./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4bba5642-f13e-41e7-9775-5768d16e23e6/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4bba5642-f13e-41e7-9775-5768d16e23e6/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4bba5642-f13e-41e7-9775-5768d16e23e6/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4bba5642-f13e-41e7-9775-5768d16e23e6/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4bba5642-f13e-41e7-9775-5768d16e23e6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4bba5642-f13e-41e7-9775-5768d16e23e6/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 23bbff91fb2bcbd238fb97db06c7d4983c05a850 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 02:59:31,506 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:59:31,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:59:31,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:59:31,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:59:31,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:59:31,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:59:31,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:59:31,622 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:59:31,629 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:59:31,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:59:31,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:59:31,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:59:31,639 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:59:31,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:59:31,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:59:31,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:59:31,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:59:31,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:59:31,662 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:59:31,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:59:31,666 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:59:31,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:59:31,669 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:59:31,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:59:31,675 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:59:31,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:59:31,677 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:59:31,678 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:59:31,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:59:31,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:59:31,687 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:59:31,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:59:31,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:59:31,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:59:31,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:59:31,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:59:31,694 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:59:31,694 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:59:31,695 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:59:31,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:59:31,699 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4bba5642-f13e-41e7-9775-5768d16e23e6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 02:59:31,742 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:59:31,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:59:31,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:59:31,744 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:59:31,745 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:59:31,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:59:31,745 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 02:59:31,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 02:59:31,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 02:59:31,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:59:31,748 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 02:59:31,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 02:59:31,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 02:59:31,749 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 02:59:31,749 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 02:59:31,749 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:59:31,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 02:59:31,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:59:31,750 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:59:31,750 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 02:59:31,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 02:59:31,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:59:31,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:59:31,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 02:59:31,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 02:59:31,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 02:59:31,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 02:59:31,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 02:59:31,753 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:59:31,754 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_4bba5642-f13e-41e7-9775-5768d16e23e6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4bba5642-f13e-41e7-9775-5768d16e23e6/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bbff91fb2bcbd238fb97db06c7d4983c05a850 [2020-11-28 02:59:32,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:59:32,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:59:32,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:59:32,128 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:59:32,130 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:59:32,132 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4bba5642-f13e-41e7-9775-5768d16e23e6/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2020-11-28 02:59:32,206 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4bba5642-f13e-41e7-9775-5768d16e23e6/bin/uautomizer/data/05a388be6/a89afc887f2844bcbc93a37be6566527/FLAGe634fe3b9 [2020-11-28 02:59:32,750 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:59:32,751 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4bba5642-f13e-41e7-9775-5768d16e23e6/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2020-11-28 02:59:32,758 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4bba5642-f13e-41e7-9775-5768d16e23e6/bin/uautomizer/data/05a388be6/a89afc887f2844bcbc93a37be6566527/FLAGe634fe3b9 [2020-11-28 02:59:33,139 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4bba5642-f13e-41e7-9775-5768d16e23e6/bin/uautomizer/data/05a388be6/a89afc887f2844bcbc93a37be6566527 [2020-11-28 02:59:33,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:59:33,143 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 02:59:33,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:59:33,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:59:33,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:59:33,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:59:33" (1/1) ... [2020-11-28 02:59:33,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d9d72a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33, skipping insertion in model container [2020-11-28 02:59:33,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:59:33" (1/1) ... [2020-11-28 02:59:33,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:59:33,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:59:33,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:59:33,387 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:59:33,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:59:33,469 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:59:33,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33 WrapperNode [2020-11-28 02:59:33,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:59:33,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 02:59:33,473 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 02:59:33,473 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 02:59:33,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33" (1/1) ... [2020-11-28 02:59:33,493 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33" (1/1) ... [2020-11-28 02:59:33,512 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 02:59:33,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:59:33,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:59:33,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:59:33,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33" (1/1) ... [2020-11-28 02:59:33,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33" (1/1) ... [2020-11-28 02:59:33,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33" (1/1) ... [2020-11-28 02:59:33,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33" (1/1) ... [2020-11-28 02:59:33,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33" (1/1) ... [2020-11-28 02:59:33,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33" (1/1) ... [2020-11-28 02:59:33,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33" (1/1) ... [2020-11-28 02:59:33,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:59:33,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:59:33,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:59:33,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:59:33,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4bba5642-f13e-41e7-9775-5768d16e23e6/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:59:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 02:59:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-11-28 02:59:33,647 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-11-28 02:59:33,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 02:59:33,649 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-11-28 02:59:33,649 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-11-28 02:59:33,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:59:33,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:59:34,118 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:59:34,120 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 02:59:34,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:59:34 BoogieIcfgContainer [2020-11-28 02:59:34,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:59:34,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 02:59:34,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 02:59:34,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 02:59:34,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:59:33" (1/3) ... [2020-11-28 02:59:34,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fccdddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:59:34, skipping insertion in model container [2020-11-28 02:59:34,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:59:33" (2/3) ... [2020-11-28 02:59:34,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fccdddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:59:34, skipping insertion in model container [2020-11-28 02:59:34,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:59:34" (3/3) ... [2020-11-28 02:59:34,134 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-2.c [2020-11-28 02:59:34,151 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 02:59:34,157 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 02:59:34,168 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 02:59:34,197 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 02:59:34,197 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 02:59:34,198 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 02:59:34,198 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:59:34,199 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:59:34,199 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 02:59:34,199 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:59:34,199 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 02:59:34,217 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-11-28 02:59:34,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 02:59:34,222 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:34,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:34,224 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:34,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:34,237 INFO L82 PathProgramCache]: Analyzing trace with hash -2146840844, now seen corresponding path program 1 times [2020-11-28 02:59:34,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:34,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270994410] [2020-11-28 02:59:34,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:34,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 02:59:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:59:34,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270994410] [2020-11-28 02:59:34,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:34,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 02:59:34,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129113720] [2020-11-28 02:59:34,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:59:34,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:34,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:59:34,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:59:34,632 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-11-28 02:59:34,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:34,727 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-11-28 02:59:34,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:59:34,733 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-28 02:59:34,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:34,754 INFO L225 Difference]: With dead ends: 44 [2020-11-28 02:59:34,756 INFO L226 Difference]: Without dead ends: 27 [2020-11-28 02:59:34,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:59:34,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-28 02:59:34,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-28 02:59:34,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-28 02:59:34,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-11-28 02:59:34,856 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2020-11-28 02:59:34,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:34,860 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-11-28 02:59:34,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:59:34,861 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-11-28 02:59:34,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 02:59:34,863 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:34,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:34,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 02:59:34,877 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:34,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:34,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1412337332, now seen corresponding path program 1 times [2020-11-28 02:59:34,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:34,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906748080] [2020-11-28 02:59:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:34,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 02:59:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:59:35,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906748080] [2020-11-28 02:59:35,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:59:35,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 02:59:35,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177291397] [2020-11-28 02:59:35,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:59:35,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:35,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:59:35,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:59:35,051 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2020-11-28 02:59:35,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:35,094 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-11-28 02:59:35,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:59:35,095 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-28 02:59:35,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:35,097 INFO L225 Difference]: With dead ends: 33 [2020-11-28 02:59:35,097 INFO L226 Difference]: Without dead ends: 29 [2020-11-28 02:59:35,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:59:35,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-28 02:59:35,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-11-28 02:59:35,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-28 02:59:35,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-11-28 02:59:35,108 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2020-11-28 02:59:35,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:35,110 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-11-28 02:59:35,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:59:35,111 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-11-28 02:59:35,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 02:59:35,115 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:35,116 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:35,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 02:59:35,117 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:35,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:35,118 INFO L82 PathProgramCache]: Analyzing trace with hash -888595213, now seen corresponding path program 1 times [2020-11-28 02:59:35,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:35,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443589357] [2020-11-28 02:59:35,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:35,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 02:59:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:35,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 02:59:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:35,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 02:59:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 02:59:35,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443589357] [2020-11-28 02:59:35,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110039492] [2020-11-28 02:59:35,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4bba5642-f13e-41e7-9775-5768d16e23e6/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:35,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 02:59:35,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 02:59:35,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:59:35,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2020-11-28 02:59:35,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288551276] [2020-11-28 02:59:35,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 02:59:35,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:35,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 02:59:35,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-11-28 02:59:35,562 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 10 states. [2020-11-28 02:59:36,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:36,011 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-11-28 02:59:36,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 02:59:36,012 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-11-28 02:59:36,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:36,014 INFO L225 Difference]: With dead ends: 55 [2020-11-28 02:59:36,014 INFO L226 Difference]: Without dead ends: 31 [2020-11-28 02:59:36,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-11-28 02:59:36,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-28 02:59:36,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-11-28 02:59:36,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-28 02:59:36,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-11-28 02:59:36,027 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2020-11-28 02:59:36,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:36,027 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-11-28 02:59:36,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 02:59:36,028 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-11-28 02:59:36,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 02:59:36,030 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:36,030 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:36,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 02:59:36,237 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:36,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:36,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1502460051, now seen corresponding path program 1 times [2020-11-28 02:59:36,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:36,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775891291] [2020-11-28 02:59:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:36,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 02:59:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:36,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 02:59:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:36,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 02:59:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 02:59:36,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775891291] [2020-11-28 02:59:36,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547240859] [2020-11-28 02:59:36,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4bba5642-f13e-41e7-9775-5768d16e23e6/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:36,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 02:59:36,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 02:59:36,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:59:36,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-11-28 02:59:36,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145050802] [2020-11-28 02:59:36,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 02:59:36,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:36,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 02:59:36,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-28 02:59:36,545 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 9 states. [2020-11-28 02:59:36,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:36,782 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2020-11-28 02:59:36,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 02:59:36,782 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-11-28 02:59:36,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:36,785 INFO L225 Difference]: With dead ends: 51 [2020-11-28 02:59:36,786 INFO L226 Difference]: Without dead ends: 47 [2020-11-28 02:59:36,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-28 02:59:36,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-28 02:59:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-11-28 02:59:36,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-28 02:59:36,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-11-28 02:59:36,805 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2020-11-28 02:59:36,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:36,806 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-11-28 02:59:36,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 02:59:36,807 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-11-28 02:59:36,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-28 02:59:36,813 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:36,814 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:37,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:37,016 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:37,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:37,017 INFO L82 PathProgramCache]: Analyzing trace with hash -801267146, now seen corresponding path program 1 times [2020-11-28 02:59:37,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:37,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551510684] [2020-11-28 02:59:37,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:37,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 02:59:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:37,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 02:59:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:37,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 02:59:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:37,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 02:59:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:37,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-28 02:59:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-28 02:59:37,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551510684] [2020-11-28 02:59:37,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590836047] [2020-11-28 02:59:37,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4bba5642-f13e-41e7-9775-5768d16e23e6/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:37,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 02:59:37,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 02:59:37,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:59:37,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-11-28 02:59:37,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082599279] [2020-11-28 02:59:37,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 02:59:37,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:37,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 02:59:37,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-11-28 02:59:37,379 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 11 states. [2020-11-28 02:59:37,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:37,750 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2020-11-28 02:59:37,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 02:59:37,751 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-11-28 02:59:37,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:37,753 INFO L225 Difference]: With dead ends: 105 [2020-11-28 02:59:37,753 INFO L226 Difference]: Without dead ends: 63 [2020-11-28 02:59:37,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-11-28 02:59:37,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-28 02:59:37,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-28 02:59:37,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-28 02:59:37,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2020-11-28 02:59:37,785 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2020-11-28 02:59:37,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:37,786 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2020-11-28 02:59:37,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 02:59:37,791 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2020-11-28 02:59:37,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-28 02:59:37,795 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:37,795 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:37,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:37,996 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:37,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:37,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1583643682, now seen corresponding path program 1 times [2020-11-28 02:59:37,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:37,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614820146] [2020-11-28 02:59:37,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:38,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 02:59:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:38,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 02:59:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:38,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 02:59:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:38,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 02:59:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:38,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 02:59:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-28 02:59:38,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614820146] [2020-11-28 02:59:38,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504956322] [2020-11-28 02:59:38,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4bba5642-f13e-41e7-9775-5768d16e23e6/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:38,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 02:59:38,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-28 02:59:38,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:59:38,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2020-11-28 02:59:38,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049573801] [2020-11-28 02:59:38,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 02:59:38,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:38,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 02:59:38,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-11-28 02:59:38,405 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand 13 states. [2020-11-28 02:59:39,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:39,013 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2020-11-28 02:59:39,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-28 02:59:39,014 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-11-28 02:59:39,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:39,017 INFO L225 Difference]: With dead ends: 177 [2020-11-28 02:59:39,018 INFO L226 Difference]: Without dead ends: 117 [2020-11-28 02:59:39,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-11-28 02:59:39,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-11-28 02:59:39,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2020-11-28 02:59:39,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-28 02:59:39,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2020-11-28 02:59:39,074 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2020-11-28 02:59:39,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:39,074 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2020-11-28 02:59:39,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 02:59:39,074 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2020-11-28 02:59:39,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-28 02:59:39,076 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:39,076 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:39,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:39,300 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:39,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:39,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1063158393, now seen corresponding path program 1 times [2020-11-28 02:59:39,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:39,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533498434] [2020-11-28 02:59:39,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:39,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 02:59:39,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:39,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 02:59:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:39,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 02:59:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:39,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 02:59:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:39,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 02:59:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:39,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 02:59:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:39,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-28 02:59:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-28 02:59:39,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533498434] [2020-11-28 02:59:39,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214671358] [2020-11-28 02:59:39,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4bba5642-f13e-41e7-9775-5768d16e23e6/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:39,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 02:59:39,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-28 02:59:39,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:59:39,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-11-28 02:59:39,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676658487] [2020-11-28 02:59:39,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-28 02:59:39,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:39,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 02:59:39,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-11-28 02:59:39,804 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand 14 states. [2020-11-28 02:59:40,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:40,522 INFO L93 Difference]: Finished difference Result 255 states and 495 transitions. [2020-11-28 02:59:40,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-28 02:59:40,524 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-11-28 02:59:40,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:40,528 INFO L225 Difference]: With dead ends: 255 [2020-11-28 02:59:40,528 INFO L226 Difference]: Without dead ends: 155 [2020-11-28 02:59:40,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-11-28 02:59:40,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-11-28 02:59:40,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2020-11-28 02:59:40,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-28 02:59:40,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 177 transitions. [2020-11-28 02:59:40,593 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 177 transitions. Word has length 51 [2020-11-28 02:59:40,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:40,594 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 177 transitions. [2020-11-28 02:59:40,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-28 02:59:40,594 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 177 transitions. [2020-11-28 02:59:40,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-11-28 02:59:40,603 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:40,603 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:40,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-28 02:59:40,812 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:40,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:40,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1732889556, now seen corresponding path program 1 times [2020-11-28 02:59:40,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:40,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524598926] [2020-11-28 02:59:40,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:40,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 02:59:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:40,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 02:59:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:40,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 02:59:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:41,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 02:59:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:41,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 02:59:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:41,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 02:59:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:41,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 02:59:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:41,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-28 02:59:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:41,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-28 02:59:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:41,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 02:59:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:41,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 02:59:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:41,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 02:59:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:41,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 02:59:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:41,199 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-11-28 02:59:41,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524598926] [2020-11-28 02:59:41,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462639322] [2020-11-28 02:59:41,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4bba5642-f13e-41e7-9775-5768d16e23e6/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:41,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:41,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 02:59:41,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-11-28 02:59:41,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:59:41,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2020-11-28 02:59:41,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926724546] [2020-11-28 02:59:41,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-28 02:59:41,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:41,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 02:59:41,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-11-28 02:59:41,425 INFO L87 Difference]: Start difference. First operand 109 states and 177 transitions. Second operand 14 states. [2020-11-28 02:59:41,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:41,992 INFO L93 Difference]: Finished difference Result 241 states and 471 transitions. [2020-11-28 02:59:41,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-28 02:59:41,997 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 93 [2020-11-28 02:59:41,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:42,000 INFO L225 Difference]: With dead ends: 241 [2020-11-28 02:59:42,000 INFO L226 Difference]: Without dead ends: 120 [2020-11-28 02:59:42,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-11-28 02:59:42,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-11-28 02:59:42,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 98. [2020-11-28 02:59:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-28 02:59:42,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 151 transitions. [2020-11-28 02:59:42,021 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 151 transitions. Word has length 93 [2020-11-28 02:59:42,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:42,021 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 151 transitions. [2020-11-28 02:59:42,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-28 02:59:42,021 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 151 transitions. [2020-11-28 02:59:42,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-11-28 02:59:42,023 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:42,024 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:42,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:42,236 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:42,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:42,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1676450270, now seen corresponding path program 2 times [2020-11-28 02:59:42,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:42,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56846531] [2020-11-28 02:59:42,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:42,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 02:59:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:42,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 02:59:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:42,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 02:59:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:42,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 02:59:42,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:42,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 02:59:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:42,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 02:59:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:42,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 02:59:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:42,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-28 02:59:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:42,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 02:59:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:42,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 02:59:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:42,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-28 02:59:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:42,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 02:59:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:42,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 02:59:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:59:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 77 proven. 24 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-11-28 02:59:42,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56846531] [2020-11-28 02:59:42,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124619016] [2020-11-28 02:59:42,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4bba5642-f13e-41e7-9775-5768d16e23e6/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:42,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 02:59:42,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:59:42,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 02:59:42,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:59:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-11-28 02:59:42,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:59:42,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2020-11-28 02:59:42,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376882825] [2020-11-28 02:59:42,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-28 02:59:42,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:59:42,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 02:59:42,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-11-28 02:59:42,722 INFO L87 Difference]: Start difference. First operand 98 states and 151 transitions. Second operand 14 states. [2020-11-28 02:59:43,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:59:43,211 INFO L93 Difference]: Finished difference Result 212 states and 383 transitions. [2020-11-28 02:59:43,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-28 02:59:43,212 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 92 [2020-11-28 02:59:43,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:59:43,214 INFO L225 Difference]: With dead ends: 212 [2020-11-28 02:59:43,214 INFO L226 Difference]: Without dead ends: 123 [2020-11-28 02:59:43,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-11-28 02:59:43,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-28 02:59:43,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2020-11-28 02:59:43,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-11-28 02:59:43,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 183 transitions. [2020-11-28 02:59:43,233 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 183 transitions. Word has length 92 [2020-11-28 02:59:43,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:59:43,234 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 183 transitions. [2020-11-28 02:59:43,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-28 02:59:43,234 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 183 transitions. [2020-11-28 02:59:43,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-28 02:59:43,236 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:59:43,237 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:59:43,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:59:43,453 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:59:43,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:59:43,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1836149343, now seen corresponding path program 3 times [2020-11-28 02:59:43,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:59:43,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699010196] [2020-11-28 02:59:43,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:59:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:59:43,471 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:59:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:59:43,488 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:59:43,535 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:59:43,535 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 02:59:43,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 02:59:43,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:59:43 BoogieIcfgContainer [2020-11-28 02:59:43,630 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 02:59:43,631 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:59:43,631 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:59:43,631 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:59:43,632 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:59:34" (3/4) ... [2020-11-28 02:59:43,634 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 02:59:43,748 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4bba5642-f13e-41e7-9775-5768d16e23e6/bin/uautomizer/witness.graphml [2020-11-28 02:59:43,748 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:59:43,750 INFO L168 Benchmark]: Toolchain (without parser) took 10606.51 ms. Allocated memory was 111.1 MB in the beginning and 172.0 MB in the end (delta: 60.8 MB). Free memory was 81.1 MB in the beginning and 86.3 MB in the end (delta: -5.1 MB). Peak memory consumption was 55.2 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:43,751 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 79.7 MB. Free memory was 38.2 MB in the beginning and 38.1 MB in the end (delta: 33.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:59:43,752 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.00 ms. Allocated memory is still 111.1 MB. Free memory was 81.1 MB in the beginning and 88.9 MB in the end (delta: -7.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:43,752 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.01 ms. Allocated memory is still 111.1 MB. Free memory was 88.9 MB in the beginning and 87.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:59:43,753 INFO L168 Benchmark]: Boogie Preprocessor took 42.66 ms. Allocated memory is still 111.1 MB. Free memory was 87.8 MB in the beginning and 86.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:43,753 INFO L168 Benchmark]: RCFGBuilder took 564.67 ms. Allocated memory is still 111.1 MB. Free memory was 86.4 MB in the beginning and 73.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:43,753 INFO L168 Benchmark]: TraceAbstraction took 9505.22 ms. Allocated memory was 111.1 MB in the beginning and 172.0 MB in the end (delta: 60.8 MB). Free memory was 73.4 MB in the beginning and 91.5 MB in the end (delta: -18.1 MB). Peak memory consumption was 45.5 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:43,754 INFO L168 Benchmark]: Witness Printer took 117.97 ms. Allocated memory is still 172.0 MB. Free memory was 91.5 MB in the beginning and 86.3 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 02:59:43,756 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 79.7 MB. Free memory was 38.2 MB in the beginning and 38.1 MB in the end (delta: 33.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 323.00 ms. Allocated memory is still 111.1 MB. Free memory was 81.1 MB in the beginning and 88.9 MB in the end (delta: -7.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.01 ms. Allocated memory is still 111.1 MB. Free memory was 88.9 MB in the beginning and 87.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.66 ms. Allocated memory is still 111.1 MB. Free memory was 87.8 MB in the beginning and 86.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 564.67 ms. Allocated memory is still 111.1 MB. Free memory was 86.4 MB in the beginning and 73.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9505.22 ms. Allocated memory was 111.1 MB in the beginning and 172.0 MB in the end (delta: 60.8 MB). Free memory was 73.4 MB in the beginning and 91.5 MB in the end (delta: -18.1 MB). Peak memory consumption was 45.5 MB. Max. memory is 16.1 GB. * Witness Printer took 117.97 ms. Allocated memory is still 172.0 MB. Free memory was 91.5 MB in the beginning and 86.3 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L38] int x = 5; [L39] CALL, EXPR fibo1(x) VAL [\old(n)=5] [L10] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L12] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) [L39] int result = fibo1(x); [L40] COND TRUE result == 5 [L4] __assert_fail("0", "fibo_2calls_5-2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.3s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 246 SDtfs, 330 SDslu, 1293 SDs, 0 SdLazy, 1911 SolverSat, 332 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 586 GetRequests, 458 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 94 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 839 NumberOfCodeBlocks, 839 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 717 ConstructedInterpolants, 0 QuantifiedInterpolants, 75121 SizeOfPredicates, 27 NumberOfNonLiveVariables, 999 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 729/932 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 incorrect! Received shutdown request...