./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Ackermann04.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_a8b17740-305c-4bdd-92df-0203ab300b53/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann04.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/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 5e57a3ac5bdb229178b6e3922e8ce89677cf2614 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 19:32:09,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:32:09,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:32:09,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:32:09,608 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:32:09,614 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:32:09,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:32:09,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:32:09,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:32:09,637 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:32:09,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:32:09,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:32:09,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:32:09,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:32:09,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:32:09,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:32:09,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:32:09,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:32:09,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:32:09,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:32:09,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:32:09,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:32:09,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:32:09,669 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:32:09,673 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:32:09,673 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:32:09,674 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:32:09,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:32:09,675 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:32:09,677 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:32:09,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:32:09,678 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:32:09,679 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:32:09,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:32:09,681 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:32:09,682 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:32:09,682 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:32:09,683 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:32:09,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:32:09,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:32:09,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:32:09,686 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 19:32:09,709 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:32:09,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:32:09,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:32:09,711 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:32:09,711 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:32:09,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:32:09,712 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:32:09,712 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:32:09,712 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:32:09,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:32:09,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:32:09,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:32:09,713 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:32:09,713 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:32:09,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:32:09,714 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:32:09,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:32:09,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:32:09,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:32:09,715 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:32:09,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:32:09,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:32:09,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:32:09,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:32:09,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:32:09,716 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:32:09,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:32:09,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:32:09,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:32:09,717 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_a8b17740-305c-4bdd-92df-0203ab300b53/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5e57a3ac5bdb229178b6e3922e8ce89677cf2614 [2020-11-29 19:32:09,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:32:10,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:32:10,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:32:10,006 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:32:10,008 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:32:10,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/bin/uautomizer/../../sv-benchmarks/c/recursive/Ackermann04.c [2020-11-29 19:32:10,091 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/bin/uautomizer/data/5a195c7b4/348444ed44a04306a8b7103757f0062c/FLAG85b41dfaa [2020-11-29 19:32:10,629 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:32:10,629 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/sv-benchmarks/c/recursive/Ackermann04.c [2020-11-29 19:32:10,640 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/bin/uautomizer/data/5a195c7b4/348444ed44a04306a8b7103757f0062c/FLAG85b41dfaa [2020-11-29 19:32:10,992 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/bin/uautomizer/data/5a195c7b4/348444ed44a04306a8b7103757f0062c [2020-11-29 19:32:10,994 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:32:10,995 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:32:10,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:32:10,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:32:11,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:32:11,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:32:10" (1/1) ... [2020-11-29 19:32:11,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45245b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:32:11, skipping insertion in model container [2020-11-29 19:32:11,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:32:10" (1/1) ... [2020-11-29 19:32:11,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:32:11,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:32:11,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:32:11,211 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:32:11,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:32:11,241 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:32:11,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:32:11 WrapperNode [2020-11-29 19:32:11,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:32:11,243 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:32:11,244 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:32:11,244 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:32:11,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:32:11" (1/1) ... [2020-11-29 19:32:11,259 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:32:11" (1/1) ... [2020-11-29 19:32:11,275 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:32:11,276 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:32:11,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:32:11,277 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:32:11,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:32:11" (1/1) ... [2020-11-29 19:32:11,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:32:11" (1/1) ... [2020-11-29 19:32:11,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:32:11" (1/1) ... [2020-11-29 19:32:11,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:32:11" (1/1) ... [2020-11-29 19:32:11,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:32:11" (1/1) ... [2020-11-29 19:32:11,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:32:11" (1/1) ... [2020-11-29 19:32:11,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:32:11" (1/1) ... [2020-11-29 19:32:11,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:32:11,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:32:11,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:32:11,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:32:11,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:32:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/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 [2020-11-29 19:32:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:32:11,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:32:11,361 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-11-29 19:32:11,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-11-29 19:32:11,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:32:11,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:32:11,573 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:32:11,575 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 19:32:11,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:32:11 BoogieIcfgContainer [2020-11-29 19:32:11,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:32:11,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:32:11,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:32:11,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:32:11,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:32:10" (1/3) ... [2020-11-29 19:32:11,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d3c688c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:32:11, skipping insertion in model container [2020-11-29 19:32:11,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:32:11" (2/3) ... [2020-11-29 19:32:11,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d3c688c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:32:11, skipping insertion in model container [2020-11-29 19:32:11,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:32:11" (3/3) ... [2020-11-29 19:32:11,608 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2020-11-29 19:32:11,619 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:32:11,635 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 19:32:11,667 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 19:32:11,705 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:32:11,705 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:32:11,706 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:32:11,706 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:32:11,706 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:32:11,706 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:32:11,706 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:32:11,706 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:32:11,724 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-11-29 19:32:11,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 19:32:11,744 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:11,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:11,745 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:11,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:11,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1799437593, now seen corresponding path program 1 times [2020-11-29 19:32:11,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:11,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797813024] [2020-11-29 19:32:11,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:11,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 19:32:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:32:12,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797813024] [2020-11-29 19:32:12,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:32:12,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 19:32:12,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714470080] [2020-11-29 19:32:12,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:32:12,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:12,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:32:12,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:32:12,053 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-11-29 19:32:12,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:12,214 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2020-11-29 19:32:12,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:32:12,216 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-29 19:32:12,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:12,229 INFO L225 Difference]: With dead ends: 52 [2020-11-29 19:32:12,239 INFO L226 Difference]: Without dead ends: 25 [2020-11-29 19:32:12,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:32:12,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-29 19:32:12,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-29 19:32:12,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-29 19:32:12,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2020-11-29 19:32:12,281 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 12 [2020-11-29 19:32:12,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:12,282 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2020-11-29 19:32:12,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:32:12,282 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2020-11-29 19:32:12,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 19:32:12,284 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:12,284 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:12,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:32:12,285 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:12,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:12,286 INFO L82 PathProgramCache]: Analyzing trace with hash 335222435, now seen corresponding path program 1 times [2020-11-29 19:32:12,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:12,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935885579] [2020-11-29 19:32:12,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:12,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 19:32:12,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:12,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:12,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 19:32:12,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935885579] [2020-11-29 19:32:12,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386702972] [2020-11-29 19:32:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/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 [2020-11-29 19:32:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:12,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:32:12,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 19:32:12,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:12,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-11-29 19:32:12,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047671520] [2020-11-29 19:32:12,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 19:32:12,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:12,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:32:12,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:32:12,606 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand 8 states. [2020-11-29 19:32:12,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:12,729 INFO L93 Difference]: Finished difference Result 49 states and 74 transitions. [2020-11-29 19:32:12,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:32:12,731 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-11-29 19:32:12,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:12,733 INFO L225 Difference]: With dead ends: 49 [2020-11-29 19:32:12,733 INFO L226 Difference]: Without dead ends: 27 [2020-11-29 19:32:12,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:32:12,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-29 19:32:12,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-29 19:32:12,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 19:32:12,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2020-11-29 19:32:12,751 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 19 [2020-11-29 19:32:12,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:12,753 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2020-11-29 19:32:12,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 19:32:12,753 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2020-11-29 19:32:12,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-29 19:32:12,756 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:12,757 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:12,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 19:32:12,959 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:12,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:12,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1209780356, now seen corresponding path program 1 times [2020-11-29 19:32:12,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:12,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651116037] [2020-11-29 19:32:12,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:13,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 19:32:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:13,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:13,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:13,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 19:32:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-29 19:32:13,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651116037] [2020-11-29 19:32:13,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833428322] [2020-11-29 19:32:13,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/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 [2020-11-29 19:32:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:13,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:32:13,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-29 19:32:13,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:13,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-11-29 19:32:13,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654181024] [2020-11-29 19:32:13,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 19:32:13,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:13,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:32:13,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:32:13,299 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand 8 states. [2020-11-29 19:32:13,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:13,491 INFO L93 Difference]: Finished difference Result 74 states and 134 transitions. [2020-11-29 19:32:13,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 19:32:13,494 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-11-29 19:32:13,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:13,497 INFO L225 Difference]: With dead ends: 74 [2020-11-29 19:32:13,497 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 19:32:13,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:32:13,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 19:32:13,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-11-29 19:32:13,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-29 19:32:13,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 76 transitions. [2020-11-29 19:32:13,521 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 76 transitions. Word has length 32 [2020-11-29 19:32:13,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:13,522 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 76 transitions. [2020-11-29 19:32:13,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 19:32:13,522 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 76 transitions. [2020-11-29 19:32:13,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-29 19:32:13,528 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:13,528 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:13,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:13,745 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:13,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:13,746 INFO L82 PathProgramCache]: Analyzing trace with hash 578809375, now seen corresponding path program 2 times [2020-11-29 19:32:13,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:13,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423504092] [2020-11-29 19:32:13,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:13,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 19:32:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:13,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:13,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:13,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:13,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 19:32:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:13,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 19:32:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-29 19:32:13,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423504092] [2020-11-29 19:32:13,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296024511] [2020-11-29 19:32:13,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/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 [2020-11-29 19:32:14,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:32:14,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:14,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 19:32:14,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:14,103 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-29 19:32:14,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:14,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-11-29 19:32:14,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057942399] [2020-11-29 19:32:14,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 19:32:14,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:14,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:32:14,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:32:14,106 INFO L87 Difference]: Start difference. First operand 50 states and 76 transitions. Second operand 8 states. [2020-11-29 19:32:14,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:14,261 INFO L93 Difference]: Finished difference Result 120 states and 227 transitions. [2020-11-29 19:32:14,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 19:32:14,262 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-11-29 19:32:14,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:14,264 INFO L225 Difference]: With dead ends: 120 [2020-11-29 19:32:14,265 INFO L226 Difference]: Without dead ends: 53 [2020-11-29 19:32:14,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:32:14,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-29 19:32:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-11-29 19:32:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-29 19:32:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 76 transitions. [2020-11-29 19:32:14,286 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 76 transitions. Word has length 45 [2020-11-29 19:32:14,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:14,287 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 76 transitions. [2020-11-29 19:32:14,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 19:32:14,287 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 76 transitions. [2020-11-29 19:32:14,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-11-29 19:32:14,296 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:14,297 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:14,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:14,523 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:14,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:14,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1534840636, now seen corresponding path program 3 times [2020-11-29 19:32:14,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:14,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011605120] [2020-11-29 19:32:14,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:14,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 19:32:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:14,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:14,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:14,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:14,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:14,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:14,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:14,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 19:32:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:14,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-29 19:32:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:15,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:15,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-11-29 19:32:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:15,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:15,046 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 101 proven. 59 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-11-29 19:32:15,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011605120] [2020-11-29 19:32:15,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344998831] [2020-11-29 19:32:15,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/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 [2020-11-29 19:32:15,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-29 19:32:15,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:15,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 19:32:15,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 98 proven. 19 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-11-29 19:32:15,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:15,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 18 [2020-11-29 19:32:15,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056161668] [2020-11-29 19:32:15,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 19:32:15,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:15,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 19:32:15,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-11-29 19:32:15,266 INFO L87 Difference]: Start difference. First operand 53 states and 76 transitions. Second operand 18 states. [2020-11-29 19:32:16,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:16,076 INFO L93 Difference]: Finished difference Result 119 states and 222 transitions. [2020-11-29 19:32:16,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-29 19:32:16,077 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-11-29 19:32:16,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:16,081 INFO L225 Difference]: With dead ends: 119 [2020-11-29 19:32:16,081 INFO L226 Difference]: Without dead ends: 71 [2020-11-29 19:32:16,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=261, Invalid=999, Unknown=0, NotChecked=0, Total=1260 [2020-11-29 19:32:16,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-29 19:32:16,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2020-11-29 19:32:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-29 19:32:16,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2020-11-29 19:32:16,109 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 79 [2020-11-29 19:32:16,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:16,110 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2020-11-29 19:32:16,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 19:32:16,110 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2020-11-29 19:32:16,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-29 19:32:16,115 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:16,115 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:16,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:16,324 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:16,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:16,325 INFO L82 PathProgramCache]: Analyzing trace with hash -113129588, now seen corresponding path program 4 times [2020-11-29 19:32:16,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:16,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511294577] [2020-11-29 19:32:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:16,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 19:32:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:16,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:16,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:16,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:16,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:16,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:16,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 19:32:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:16,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-29 19:32:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:16,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:16,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:16,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:16,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:16,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 19:32:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:16,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 19:32:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:16,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-11-29 19:32:16,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:16,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:16,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:16,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:16,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 19:32:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:16,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 19:32:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:16,855 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 153 proven. 289 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2020-11-29 19:32:16,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511294577] [2020-11-29 19:32:16,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668899259] [2020-11-29 19:32:16,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/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 [2020-11-29 19:32:16,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:32:16,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:16,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 19:32:16,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 475 proven. 114 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2020-11-29 19:32:17,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:17,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 18 [2020-11-29 19:32:17,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678299313] [2020-11-29 19:32:17,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 19:32:17,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:17,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 19:32:17,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-11-29 19:32:17,189 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand 18 states. [2020-11-29 19:32:18,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:18,265 INFO L93 Difference]: Finished difference Result 135 states and 257 transitions. [2020-11-29 19:32:18,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-29 19:32:18,265 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 131 [2020-11-29 19:32:18,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:18,268 INFO L225 Difference]: With dead ends: 135 [2020-11-29 19:32:18,268 INFO L226 Difference]: Without dead ends: 74 [2020-11-29 19:32:18,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=450, Invalid=1712, Unknown=0, NotChecked=0, Total=2162 [2020-11-29 19:32:18,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-29 19:32:18,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2020-11-29 19:32:18,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-29 19:32:18,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 93 transitions. [2020-11-29 19:32:18,286 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 93 transitions. Word has length 131 [2020-11-29 19:32:18,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:18,286 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 93 transitions. [2020-11-29 19:32:18,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 19:32:18,287 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 93 transitions. [2020-11-29 19:32:18,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-11-29 19:32:18,289 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:18,290 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:18,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 19:32:18,516 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:18,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:18,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1068197804, now seen corresponding path program 5 times [2020-11-29 19:32:18,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:18,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984174585] [2020-11-29 19:32:18,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:18,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 19:32:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:18,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:18,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:18,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:18,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:18,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:18,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 19:32:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:18,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-29 19:32:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:18,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:19,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:19,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:19,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:19,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:19,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 19:32:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:19,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 19:32:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:19,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 19:32:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:19,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-29 19:32:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:19,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-11-29 19:32:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:19,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:19,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:19,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:19,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:19,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:19,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:19,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 19:32:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:19,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 19:32:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:19,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 19:32:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:19,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-29 19:32:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 258 proven. 609 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2020-11-29 19:32:19,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984174585] [2020-11-29 19:32:19,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75827062] [2020-11-29 19:32:19,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/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 [2020-11-29 19:32:19,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-29 19:32:19,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:19,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 45 conjunts are in the unsatisfiable core [2020-11-29 19:32:19,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:19,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 972 proven. 226 refuted. 0 times theorem prover too weak. 543 trivial. 0 not checked. [2020-11-29 19:32:19,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:19,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2020-11-29 19:32:19,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035211141] [2020-11-29 19:32:19,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-29 19:32:19,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:19,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-29 19:32:19,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2020-11-29 19:32:19,702 INFO L87 Difference]: Start difference. First operand 67 states and 93 transitions. Second operand 30 states. [2020-11-29 19:32:21,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:21,098 INFO L93 Difference]: Finished difference Result 176 states and 323 transitions. [2020-11-29 19:32:21,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-29 19:32:21,098 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 183 [2020-11-29 19:32:21,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:21,101 INFO L225 Difference]: With dead ends: 176 [2020-11-29 19:32:21,101 INFO L226 Difference]: Without dead ends: 110 [2020-11-29 19:32:21,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=460, Invalid=2732, Unknown=0, NotChecked=0, Total=3192 [2020-11-29 19:32:21,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-11-29 19:32:21,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-11-29 19:32:21,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-11-29 19:32:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 160 transitions. [2020-11-29 19:32:21,127 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 160 transitions. Word has length 183 [2020-11-29 19:32:21,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:21,128 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 160 transitions. [2020-11-29 19:32:21,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-29 19:32:21,128 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 160 transitions. [2020-11-29 19:32:21,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-11-29 19:32:21,132 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:21,132 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 18, 13, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:21,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:21,360 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:21,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:21,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1103077029, now seen corresponding path program 6 times [2020-11-29 19:32:21,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:21,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558904416] [2020-11-29 19:32:21,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 19:32:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 19:32:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-29 19:32:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-11-29 19:32:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:21,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 19:32:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 19:32:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 19:32:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-29 19:32:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-11-29 19:32:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 19:32:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-29 19:32:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-11-29 19:32:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-11-29 19:32:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:21,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 192 proven. 575 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2020-11-29 19:32:21,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558904416] [2020-11-29 19:32:21,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106156047] [2020-11-29 19:32:21,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/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 [2020-11-29 19:32:22,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-29 19:32:22,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:22,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 19:32:22,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:22,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 952 proven. 18 refuted. 0 times theorem prover too weak. 1337 trivial. 0 not checked. [2020-11-29 19:32:22,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:22,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-11-29 19:32:22,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876078156] [2020-11-29 19:32:22,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 19:32:22,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:22,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 19:32:22,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:32:22,173 INFO L87 Difference]: Start difference. First operand 107 states and 160 transitions. Second operand 11 states. [2020-11-29 19:32:22,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:22,382 INFO L93 Difference]: Finished difference Result 216 states and 392 transitions. [2020-11-29 19:32:22,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 19:32:22,383 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 210 [2020-11-29 19:32:22,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:22,385 INFO L225 Difference]: With dead ends: 216 [2020-11-29 19:32:22,385 INFO L226 Difference]: Without dead ends: 114 [2020-11-29 19:32:22,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-11-29 19:32:22,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-29 19:32:22,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2020-11-29 19:32:22,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-29 19:32:22,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 156 transitions. [2020-11-29 19:32:22,416 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 156 transitions. Word has length 210 [2020-11-29 19:32:22,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:22,417 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 156 transitions. [2020-11-29 19:32:22,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 19:32:22,417 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 156 transitions. [2020-11-29 19:32:22,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-11-29 19:32:22,422 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:22,422 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:22,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:22,636 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:22,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:22,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1207590662, now seen corresponding path program 7 times [2020-11-29 19:32:22,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:22,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242567914] [2020-11-29 19:32:22,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:22,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 19:32:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:22,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:22,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:22,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:22,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:22,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:22,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:22,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 19:32:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:22,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-29 19:32:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:22,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:22,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:22,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:22,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:22,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 19:32:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:22,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 19:32:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:22,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 19:32:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:22,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-11-29 19:32:22,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:22,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:23,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:23,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:23,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:23,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:23,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:23,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 19:32:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:23,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 19:32:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:23,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 19:32:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:23,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-29 19:32:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:23,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-11-29 19:32:23,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:23,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 686 proven. 70 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2020-11-29 19:32:23,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242567914] [2020-11-29 19:32:23,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29315407] [2020-11-29 19:32:23,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:23,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-29 19:32:23,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2020-11-29 19:32:23,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:23,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 26 [2020-11-29 19:32:23,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188927562] [2020-11-29 19:32:23,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-29 19:32:23,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:23,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-29 19:32:23,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-11-29 19:32:23,904 INFO L87 Difference]: Start difference. First operand 106 states and 156 transitions. Second operand 26 states. [2020-11-29 19:32:25,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:25,708 INFO L93 Difference]: Finished difference Result 183 states and 348 transitions. [2020-11-29 19:32:25,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-29 19:32:25,709 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 183 [2020-11-29 19:32:25,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:25,714 INFO L225 Difference]: With dead ends: 183 [2020-11-29 19:32:25,714 INFO L226 Difference]: Without dead ends: 179 [2020-11-29 19:32:25,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=739, Invalid=3043, Unknown=0, NotChecked=0, Total=3782 [2020-11-29 19:32:25,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-29 19:32:25,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 120. [2020-11-29 19:32:25,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-11-29 19:32:25,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 192 transitions. [2020-11-29 19:32:25,750 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 192 transitions. Word has length 183 [2020-11-29 19:32:25,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:25,751 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 192 transitions. [2020-11-29 19:32:25,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-29 19:32:25,751 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 192 transitions. [2020-11-29 19:32:25,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-11-29 19:32:25,754 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:25,754 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:25,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-29 19:32:25,968 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:25,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:25,969 INFO L82 PathProgramCache]: Analyzing trace with hash -290564854, now seen corresponding path program 8 times [2020-11-29 19:32:25,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:25,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130338095] [2020-11-29 19:32:25,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 19:32:26,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:26,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:26,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 19:32:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-29 19:32:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 19:32:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 19:32:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 19:32:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-11-29 19:32:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:26,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 19:32:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 19:32:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 19:32:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 446 proven. 274 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2020-11-29 19:32:26,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130338095] [2020-11-29 19:32:26,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615524322] [2020-11-29 19:32:26,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:26,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:32:26,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:26,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-29 19:32:26,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2020-11-29 19:32:27,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:27,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 24 [2020-11-29 19:32:27,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035134252] [2020-11-29 19:32:27,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-29 19:32:27,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:27,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 19:32:27,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2020-11-29 19:32:27,081 INFO L87 Difference]: Start difference. First operand 120 states and 192 transitions. Second operand 24 states. [2020-11-29 19:32:28,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:28,402 INFO L93 Difference]: Finished difference Result 248 states and 452 transitions. [2020-11-29 19:32:28,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-29 19:32:28,403 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 157 [2020-11-29 19:32:28,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:28,405 INFO L225 Difference]: With dead ends: 248 [2020-11-29 19:32:28,406 INFO L226 Difference]: Without dead ends: 137 [2020-11-29 19:32:28,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=543, Invalid=2649, Unknown=0, NotChecked=0, Total=3192 [2020-11-29 19:32:28,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-11-29 19:32:28,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 120. [2020-11-29 19:32:28,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-11-29 19:32:28,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 183 transitions. [2020-11-29 19:32:28,430 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 183 transitions. Word has length 157 [2020-11-29 19:32:28,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:28,430 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 183 transitions. [2020-11-29 19:32:28,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-29 19:32:28,430 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 183 transitions. [2020-11-29 19:32:28,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-11-29 19:32:28,434 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:32:28,434 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:32:28,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:28,652 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:32:28,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:32:28,653 INFO L82 PathProgramCache]: Analyzing trace with hash 810495023, now seen corresponding path program 9 times [2020-11-29 19:32:28,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:32:28,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834597046] [2020-11-29 19:32:28,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:32:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:28,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 19:32:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:28,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:28,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:28,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:28,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:28,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:28,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 19:32:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:28,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-29 19:32:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:28,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:28,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:29,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:29,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:29,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 19:32:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:29,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 19:32:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:29,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 19:32:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:29,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-11-29 19:32:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:29,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:29,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:29,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:29,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:29,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:32:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:29,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 19:32:29,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:29,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-29 19:32:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:29,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-29 19:32:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:29,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-29 19:32:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:32:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 503 proven. 360 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2020-11-29 19:32:29,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834597046] [2020-11-29 19:32:29,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044932602] [2020-11-29 19:32:29,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:29,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-11-29 19:32:29,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:32:29,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-29 19:32:29,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:32:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-11-29 19:32:29,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:32:29,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 25 [2020-11-29 19:32:29,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37853477] [2020-11-29 19:32:29,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-29 19:32:29,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:32:29,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-29 19:32:29,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2020-11-29 19:32:29,896 INFO L87 Difference]: Start difference. First operand 120 states and 183 transitions. Second operand 25 states. [2020-11-29 19:32:31,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:32:31,666 INFO L93 Difference]: Finished difference Result 241 states and 414 transitions. [2020-11-29 19:32:31,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-29 19:32:31,667 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 170 [2020-11-29 19:32:31,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:32:31,668 INFO L225 Difference]: With dead ends: 241 [2020-11-29 19:32:31,668 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 19:32:31,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=670, Invalid=3236, Unknown=0, NotChecked=0, Total=3906 [2020-11-29 19:32:31,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 19:32:31,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 19:32:31,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 19:32:31,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 19:32:31,674 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 170 [2020-11-29 19:32:31,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:32:31,674 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 19:32:31,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-29 19:32:31,674 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 19:32:31,674 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 19:32:31,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:32:31,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 19:32:33,892 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 10 [2020-11-29 19:32:35,361 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 130 DAG size of output: 50 [2020-11-29 19:32:35,502 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 10 [2020-11-29 19:32:35,519 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 19:32:35,519 INFO L274 CegarLoopResult]: For program point L29(lines 29 33) no Hoare annotation was computed. [2020-11-29 19:32:35,520 INFO L277 CegarLoopResult]: At program point L27(lines 27 47) the Hoare annotation is: true [2020-11-29 19:32:35,520 INFO L274 CegarLoopResult]: For program point L42(lines 42 46) no Hoare annotation was computed. [2020-11-29 19:32:35,520 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-11-29 19:32:35,520 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 19:32:35,520 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 19:32:35,520 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 19:32:35,520 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-29 19:32:35,520 INFO L274 CegarLoopResult]: For program point L45(line 45) no Hoare annotation was computed. [2020-11-29 19:32:35,520 INFO L277 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: true [2020-11-29 19:32:35,521 INFO L274 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-11-29 19:32:35,521 INFO L274 CegarLoopResult]: For program point L35(lines 35 40) no Hoare annotation was computed. [2020-11-29 19:32:35,521 INFO L274 CegarLoopResult]: For program point ackermannEXIT(lines 16 24) no Hoare annotation was computed. [2020-11-29 19:32:35,521 INFO L270 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (not (= |ackermann_#in~n| 0)) (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2020-11-29 19:32:35,521 INFO L274 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-11-29 19:32:35,521 INFO L277 CegarLoopResult]: At program point ackermannENTRY(lines 16 24) the Hoare annotation is: true [2020-11-29 19:32:35,521 INFO L270 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2020-11-29 19:32:35,522 INFO L270 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (<= 5 |ackermann_#t~ret8|)) (.cse6 (<= |ackermann_#in~n| 1)) (.cse5 (<= |ackermann_#in~m| 1)) (.cse1 (not (<= 1 |ackermann_#in~m|))) (.cse2 (<= 2 |ackermann_#in~m|)) (.cse7 (= |ackermann_#in~m| 0))) (and (or (and .cse0 (<= |ackermann_#in~n| 4)) (<= 6 |ackermann_#t~ret8|) (and (<= |ackermann_#in~n| 3) (<= 4 |ackermann_#t~ret8|)) (<= |ackermann_#in~n| 2) .cse1 .cse2) (let ((.cse3 (= ackermann_~m |ackermann_#in~m|)) (.cse4 (= ackermann_~n |ackermann_#in~n|))) (or (and .cse3 .cse0 .cse4) (and .cse5 .cse3 .cse4) (and .cse6 .cse3 .cse4))) (or (and .cse0 .cse2) (and .cse6 (<= 3 |ackermann_#t~ret8|)) (= |ackermann_#t~ret8| 3) (and .cse6 .cse5) (<= 3 |ackermann_#in~n|) .cse1) (or (= |ackermann_#t~ret8| 2) (<= 2 |ackermann_#in~n|) .cse1 .cse2) (or (not (<= |ackermann_#in~n| 0)) .cse7) (or (not (<= |ackermann_#in~m| 0)) .cse7))) [2020-11-29 19:32:35,522 INFO L274 CegarLoopResult]: For program point L20(lines 20 22) no Hoare annotation was computed. [2020-11-29 19:32:35,522 INFO L274 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-11-29 19:32:35,522 INFO L274 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-11-29 19:32:35,522 INFO L274 CegarLoopResult]: For program point L17(lines 17 19) no Hoare annotation was computed. [2020-11-29 19:32:35,522 INFO L274 CegarLoopResult]: For program point ackermannFINAL(lines 16 24) no Hoare annotation was computed. [2020-11-29 19:32:35,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:32:35 BoogieIcfgContainer [2020-11-29 19:32:35,530 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:32:35,531 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:32:35,531 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:32:35,531 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:32:35,531 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:32:11" (3/4) ... [2020-11-29 19:32:35,535 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 19:32:35,543 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2020-11-29 19:32:35,548 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-29 19:32:35,549 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-29 19:32:35,549 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 19:32:35,549 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 19:32:35,605 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a8b17740-305c-4bdd-92df-0203ab300b53/bin/uautomizer/witness.graphml [2020-11-29 19:32:35,605 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:32:35,606 INFO L168 Benchmark]: Toolchain (without parser) took 24610.16 ms. Allocated memory was 92.3 MB in the beginning and 369.1 MB in the end (delta: 276.8 MB). Free memory was 61.3 MB in the beginning and 224.7 MB in the end (delta: -163.4 MB). Peak memory consumption was 115.2 MB. Max. memory is 16.1 GB. [2020-11-29 19:32:35,607 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 92.3 MB. Free memory is still 49.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:32:35,607 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.48 ms. Allocated memory is still 92.3 MB. Free memory was 61.3 MB in the beginning and 69.3 MB in the end (delta: -8.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 19:32:35,608 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.27 ms. Allocated memory is still 92.3 MB. Free memory was 69.3 MB in the beginning and 68.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:32:35,608 INFO L168 Benchmark]: Boogie Preprocessor took 19.39 ms. Allocated memory is still 92.3 MB. Free memory was 68.1 MB in the beginning and 67.2 MB in the end (delta: 879.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:32:35,609 INFO L168 Benchmark]: RCFGBuilder took 281.00 ms. Allocated memory is still 92.3 MB. Free memory was 66.8 MB in the beginning and 54.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-29 19:32:35,609 INFO L168 Benchmark]: TraceAbstraction took 23937.49 ms. Allocated memory was 92.3 MB in the beginning and 369.1 MB in the end (delta: 276.8 MB). Free memory was 53.9 MB in the beginning and 226.8 MB in the end (delta: -172.9 MB). Peak memory consumption was 206.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:32:35,610 INFO L168 Benchmark]: Witness Printer took 74.54 ms. Allocated memory is still 369.1 MB. Free memory was 226.8 MB in the beginning and 224.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 19:32:35,618 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 92.3 MB. Free memory is still 49.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 245.48 ms. Allocated memory is still 92.3 MB. Free memory was 61.3 MB in the beginning and 69.3 MB in the end (delta: -8.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.27 ms. Allocated memory is still 92.3 MB. Free memory was 69.3 MB in the beginning and 68.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.39 ms. Allocated memory is still 92.3 MB. Free memory was 68.1 MB in the beginning and 67.2 MB in the end (delta: 879.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 281.00 ms. Allocated memory is still 92.3 MB. Free memory was 66.8 MB in the beginning and 54.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 23937.49 ms. Allocated memory was 92.3 MB in the beginning and 369.1 MB in the end (delta: 276.8 MB). Free memory was 53.9 MB in the beginning and 226.8 MB in the end (delta: -172.9 MB). Peak memory consumption was 206.4 MB. Max. memory is 16.1 GB. * Witness Printer took 74.54 ms. Allocated memory is still 369.1 MB. Free memory was 226.8 MB in the beginning and 224.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20.2s, OverallIterations: 11, TraceHistogramMax: 31, AutomataDifference: 9.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 285 SDtfs, 383 SDslu, 1418 SDs, 0 SdLazy, 3971 SolverSat, 901 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1916 GetRequests, 1564 SyntacticMatches, 0 SemanticMatches, 352 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3707 ImplicationChecksByTransitivity, 7.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred 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, 11 MinimizatonAttempts, 112 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 534 PreInvPairs, 1234 NumberOfFragments, 146 HoareAnnotationTreeSize, 534 FomulaSimplifications, 81035 FormulaSimplificationTreeSizeReduction, 1.8s HoareSimplificationTime, 6 FomulaSimplificationsInter, 3599 FormulaSimplificationTreeSizeReductionInter, 1.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 6.6s InterpolantComputationTime, 2430 NumberOfCodeBlocks, 2228 NumberOfCodeBlocksAsserted, 59 NumberOfCheckSat, 2409 ConstructedInterpolants, 0 QuantifiedInterpolants, 639829 SizeOfPredicates, 68 NumberOfNonLiveVariables, 3227 ConjunctsInSsa, 219 ConjunctsInUnsatCore, 21 InterpolantComputations, 1 PerfectInterpolantSequences, 16007/19428 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...