./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY --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 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:40:41,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:40:41,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:40:41,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:40:41,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:40:41,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:40:41,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:40:41,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:40:41,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:40:41,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:40:41,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:40:41,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:40:41,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:40:41,297 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:40:41,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:40:41,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:40:41,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:40:41,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:40:41,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:40:41,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:40:41,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:40:41,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:40:41,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:40:41,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:40:41,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:40:41,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:40:41,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:40:41,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:40:41,340 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:40:41,342 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:40:41,343 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:40:41,344 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:40:41,346 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:40:41,347 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:40:41,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:40:41,349 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:40:41,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:40:41,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:40:41,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:40:41,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:40:41,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:40:41,353 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:40:41,392 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:40:41,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:40:41,402 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:40:41,402 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:40:41,407 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:40:41,407 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:40:41,407 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:40:41,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:40:41,408 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:40:41,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:40:41,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:40:41,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:40:41,410 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:40:41,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:40:41,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:40:41,411 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:40:41,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:40:41,411 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:40:41,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:40:41,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:40:41,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:40:41,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:40:41,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:40:41,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:40:41,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:40:41,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:40:41,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:40:41,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:40:41,414 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:40:41,416 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:40:41,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:40:41,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:40:41,417 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_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 [2021-11-07 07:40:41,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:40:41,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:40:41,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:40:41,687 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:40:41,688 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:40:41,689 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-11-07 07:40:41,785 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/data/5858e368a/af9c8b36fad14b60a4c02552e7b416db/FLAGe825aa70c [2021-11-07 07:40:42,253 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:40:42,254 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-11-07 07:40:42,265 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/data/5858e368a/af9c8b36fad14b60a4c02552e7b416db/FLAGe825aa70c [2021-11-07 07:40:42,640 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/data/5858e368a/af9c8b36fad14b60a4c02552e7b416db [2021-11-07 07:40:42,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:40:42,644 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:40:42,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:40:42,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:40:42,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:40:42,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:40:42" (1/1) ... [2021-11-07 07:40:42,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6047f838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:42, skipping insertion in model container [2021-11-07 07:40:42,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:40:42" (1/1) ... [2021-11-07 07:40:42,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:40:42,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:40:42,846 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2021-11-07 07:40:42,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:40:42,860 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:40:42,875 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2021-11-07 07:40:42,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:40:42,895 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:40:42,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:42 WrapperNode [2021-11-07 07:40:42,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:40:42,900 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:40:42,900 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:40:42,900 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:40:42,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:42" (1/1) ... [2021-11-07 07:40:42,918 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:42" (1/1) ... [2021-11-07 07:40:42,932 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:40:42,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:40:42,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:40:42,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:40:42,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:42" (1/1) ... [2021-11-07 07:40:42,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:42" (1/1) ... [2021-11-07 07:40:42,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:42" (1/1) ... [2021-11-07 07:40:42,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:42" (1/1) ... [2021-11-07 07:40:42,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:42" (1/1) ... [2021-11-07 07:40:42,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:42" (1/1) ... [2021-11-07 07:40:42,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:42" (1/1) ... [2021-11-07 07:40:42,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:40:42,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:40:42,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:40:42,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:40:42,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:42" (1/1) ... [2021-11-07 07:40:42,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:40:42,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:40:42,989 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:40:42,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:40:43,023 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2021-11-07 07:40:43,024 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2021-11-07 07:40:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:40:43,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:40:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:40:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:40:43,249 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:40:43,249 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 07:40:43,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:40:43 BoogieIcfgContainer [2021-11-07 07:40:43,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:40:43,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:40:43,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:40:43,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:40:43,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:40:42" (1/3) ... [2021-11-07 07:40:43,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6106b00f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:40:43, skipping insertion in model container [2021-11-07 07:40:43,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:42" (2/3) ... [2021-11-07 07:40:43,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6106b00f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:40:43, skipping insertion in model container [2021-11-07 07:40:43,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:40:43" (3/3) ... [2021-11-07 07:40:43,273 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2021-11-07 07:40:43,278 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:40:43,278 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:40:43,345 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:40:43,351 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 07:40:43,351 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 07:40:43,366 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 07:40:43,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 07:40:43,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:40:43,371 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:40:43,372 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:40:43,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:40:43,377 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2021-11-07 07:40:43,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:40:43,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641555936] [2021-11-07 07:40:43,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:40:43,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:40:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:40:43,497 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 07:40:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:40:43,549 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 07:40:43,551 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 07:40:43,552 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 07:40:43,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:40:43,558 INFO L731 BasicCegarLoop]: Path program histogram: [1] [2021-11-07 07:40:43,561 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 07:40:43,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 07:40:43 BoogieIcfgContainer [2021-11-07 07:40:43,583 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 07:40:43,584 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 07:40:43,584 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 07:40:43,584 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 07:40:43,585 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:40:43" (3/4) ... [2021-11-07 07:40:43,587 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 07:40:43,588 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 07:40:43,590 INFO L168 Benchmark]: Toolchain (without parser) took 944.60 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 61.2 MB in the beginning and 62.8 MB in the end (delta: -1.6 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. [2021-11-07 07:40:43,591 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 94.4 MB. Free memory was 52.2 MB in the beginning and 52.2 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 07:40:43,592 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.17 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 61.0 MB in the beginning and 89.2 MB in the end (delta: -28.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 07:40:43,593 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.93 ms. Allocated memory is still 113.2 MB. Free memory was 89.2 MB in the beginning and 87.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 07:40:43,593 INFO L168 Benchmark]: Boogie Preprocessor took 19.37 ms. Allocated memory is still 113.2 MB. Free memory was 87.8 MB in the beginning and 87.0 MB in the end (delta: 892.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 07:40:43,594 INFO L168 Benchmark]: RCFGBuilder took 298.34 ms. Allocated memory is still 113.2 MB. Free memory was 87.0 MB in the beginning and 77.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 07:40:43,595 INFO L168 Benchmark]: TraceAbstraction took 329.52 ms. Allocated memory is still 113.2 MB. Free memory was 77.0 MB in the beginning and 63.5 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 07:40:43,596 INFO L168 Benchmark]: Witness Printer took 4.30 ms. Allocated memory is still 113.2 MB. Free memory was 63.3 MB in the beginning and 62.8 MB in the end (delta: 447.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 07:40:43,599 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 94.4 MB. Free memory was 52.2 MB in the beginning and 52.2 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 251.17 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 61.0 MB in the beginning and 89.2 MB in the end (delta: -28.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.93 ms. Allocated memory is still 113.2 MB. Free memory was 89.2 MB in the beginning and 87.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.37 ms. Allocated memory is still 113.2 MB. Free memory was 87.8 MB in the beginning and 87.0 MB in the end (delta: 892.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 298.34 ms. Allocated memory is still 113.2 MB. Free memory was 87.0 MB in the beginning and 77.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 329.52 ms. Allocated memory is still 113.2 MB. Free memory was 77.0 MB in the beginning and 63.5 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 4.30 ms. Allocated memory is still 113.2 MB. Free memory was 63.3 MB in the beginning and 62.8 MB in the end (delta: 447.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 36]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 33. Possible FailurePath: [L27] int n = __VERIFIER_nondet_int(); [L28] COND FALSE !(n < 1) [L31] CALL, EXPR hanoi(n) VAL [\old(n)=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L31] RET, EXPR hanoi(n) [L31] unsigned result = hanoi(n); [L33] COND FALSE !(result+1>0 && result+1 == 1< main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY 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 -> 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 [2021-11-07 07:40:46,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:40:46,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:40:46,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:40:46,563 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:40:46,564 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:40:46,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-11-07 07:40:46,643 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/data/b32f921fb/f40650b02b084574a4a26767f235ae58/FLAG57dfc4294 [2021-11-07 07:40:47,192 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:40:47,193 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-11-07 07:40:47,198 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/data/b32f921fb/f40650b02b084574a4a26767f235ae58/FLAG57dfc4294 [2021-11-07 07:40:47,568 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/data/b32f921fb/f40650b02b084574a4a26767f235ae58 [2021-11-07 07:40:47,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:40:47,572 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:40:47,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:40:47,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:40:47,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:40:47,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:40:47" (1/1) ... [2021-11-07 07:40:47,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c2bcedd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:47, skipping insertion in model container [2021-11-07 07:40:47,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:40:47" (1/1) ... [2021-11-07 07:40:47,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:40:47,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:40:47,744 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2021-11-07 07:40:47,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:40:47,759 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:40:47,774 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2021-11-07 07:40:47,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:40:47,790 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:40:47,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:47 WrapperNode [2021-11-07 07:40:47,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:40:47,792 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:40:47,792 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:40:47,792 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:40:47,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:47" (1/1) ... [2021-11-07 07:40:47,808 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:47" (1/1) ... [2021-11-07 07:40:47,861 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:40:47,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:40:47,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:40:47,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:40:47,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:47" (1/1) ... [2021-11-07 07:40:47,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:47" (1/1) ... [2021-11-07 07:40:47,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:47" (1/1) ... [2021-11-07 07:40:47,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:47" (1/1) ... [2021-11-07 07:40:47,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:47" (1/1) ... [2021-11-07 07:40:47,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:47" (1/1) ... [2021-11-07 07:40:47,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:47" (1/1) ... [2021-11-07 07:40:47,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:40:47,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:40:47,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:40:47,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:40:47,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:47" (1/1) ... [2021-11-07 07:40:47,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:40:47,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:40:47,941 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:40:47,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:40:47,996 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2021-11-07 07:40:47,996 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2021-11-07 07:40:47,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:40:47,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:40:47,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 07:40:47,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:40:48,238 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:40:48,239 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 07:40:48,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:40:48 BoogieIcfgContainer [2021-11-07 07:40:48,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:40:48,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:40:48,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:40:48,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:40:48,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:40:47" (1/3) ... [2021-11-07 07:40:48,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d03a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:40:48, skipping insertion in model container [2021-11-07 07:40:48,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:40:47" (2/3) ... [2021-11-07 07:40:48,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d03a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:40:48, skipping insertion in model container [2021-11-07 07:40:48,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:40:48" (3/3) ... [2021-11-07 07:40:48,249 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2021-11-07 07:40:48,255 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:40:48,255 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:40:48,349 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:40:48,355 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 07:40:48,356 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 07:40:48,371 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 07:40:48,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 07:40:48,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:40:48,378 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:40:48,378 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:40:48,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:40:48,384 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2021-11-07 07:40:48,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:40:48,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142407631] [2021-11-07 07:40:48,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:40:48,396 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:40:48,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:40:48,400 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:40:48,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 07:40:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:40:48,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:40:48,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:40:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:48,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:40:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:49,111 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:40:49,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142407631] [2021-11-07 07:40:49,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142407631] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:40:49,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:40:49,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2021-11-07 07:40:49,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006679082] [2021-11-07 07:40:49,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 07:40:49,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:40:49,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 07:40:49,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:40:49,135 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 07:40:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:40:49,322 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-11-07 07:40:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:40:49,324 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 11 [2021-11-07 07:40:49,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:40:49,333 INFO L225 Difference]: With dead ends: 32 [2021-11-07 07:40:49,333 INFO L226 Difference]: Without dead ends: 16 [2021-11-07 07:40:49,336 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:40:49,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-07 07:40:49,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-07 07:40:49,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 07:40:49,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-07 07:40:49,372 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2021-11-07 07:40:49,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:40:49,372 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-07 07:40:49,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 07:40:49,373 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-07 07:40:49,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 07:40:49,374 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:40:49,374 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:40:49,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:40:49,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:40:49,584 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:40:49,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:40:49,585 INFO L85 PathProgramCache]: Analyzing trace with hash -2053638732, now seen corresponding path program 1 times [2021-11-07 07:40:49,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:40:49,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060781199] [2021-11-07 07:40:49,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:40:49,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:40:49,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:40:49,589 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:40:49,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 07:40:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:40:49,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:40:49,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:40:49,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:40:49,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:40:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:40:50,707 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:40:50,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060781199] [2021-11-07 07:40:50,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060781199] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:40:50,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:40:50,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-07 07:40:50,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964170084] [2021-11-07 07:40:50,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 07:40:50,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:40:50,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 07:40:50,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:40:50,712 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:40:51,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:40:51,106 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-11-07 07:40:51,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 07:40:51,107 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 17 [2021-11-07 07:40:51,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:40:51,108 INFO L225 Difference]: With dead ends: 28 [2021-11-07 07:40:51,108 INFO L226 Difference]: Without dead ends: 22 [2021-11-07 07:40:51,109 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:40:51,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-07 07:40:51,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-07 07:40:51,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-07 07:40:51,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-07 07:40:51,114 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2021-11-07 07:40:51,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:40:51,115 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-07 07:40:51,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:40:51,115 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-07 07:40:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 07:40:51,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:40:51,117 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:40:51,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:40:51,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:40:51,324 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:40:51,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:40:51,325 INFO L85 PathProgramCache]: Analyzing trace with hash -491101836, now seen corresponding path program 2 times [2021-11-07 07:40:51,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:40:51,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880306224] [2021-11-07 07:40:51,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:40:51,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:40:51,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:40:51,328 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:40:51,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 07:40:51,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:40:51,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:40:51,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:40:51,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:40:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 07:40:51,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:40:53,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 07:40:53,883 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:40:53,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880306224] [2021-11-07 07:40:53,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880306224] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:40:53,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:40:53,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-11-07 07:40:53,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139107338] [2021-11-07 07:40:53,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 07:40:53,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:40:53,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 07:40:53,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-11-07 07:40:53,887 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-07 07:40:54,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:40:54,571 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-11-07 07:40:54,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 07:40:54,576 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 29 [2021-11-07 07:40:54,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:40:54,578 INFO L225 Difference]: With dead ends: 34 [2021-11-07 07:40:54,578 INFO L226 Difference]: Without dead ends: 28 [2021-11-07 07:40:54,579 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 07:40:54,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-07 07:40:54,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-07 07:40:54,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-07 07:40:54,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-11-07 07:40:54,585 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 29 [2021-11-07 07:40:54,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:40:54,586 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-11-07 07:40:54,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-07 07:40:54,586 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-11-07 07:40:54,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 07:40:54,588 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:40:54,588 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:40:54,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:40:54,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:40:54,799 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:40:54,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:40:54,800 INFO L85 PathProgramCache]: Analyzing trace with hash -492655308, now seen corresponding path program 3 times [2021-11-07 07:40:54,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:40:54,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402462663] [2021-11-07 07:40:54,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:40:54,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:40:54,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:40:54,815 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:40:54,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 07:40:54,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-07 07:40:54,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:40:54,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 07:40:54,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:40:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-07 07:40:55,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:40:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 07:40:59,191 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:40:59,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402462663] [2021-11-07 07:40:59,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402462663] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:40:59,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:40:59,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2021-11-07 07:40:59,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764270829] [2021-11-07 07:40:59,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-07 07:40:59,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:40:59,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-07 07:40:59,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 07:40:59,195 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2021-11-07 07:41:00,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:00,211 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-11-07 07:41:00,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 07:41:00,212 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) Word has length 41 [2021-11-07 07:41:00,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:00,213 INFO L225 Difference]: With dead ends: 40 [2021-11-07 07:41:00,213 INFO L226 Difference]: Without dead ends: 34 [2021-11-07 07:41:00,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=290, Invalid=2260, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 07:41:00,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-07 07:41:00,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-07 07:41:00,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-07 07:41:00,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-11-07 07:41:00,223 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 41 [2021-11-07 07:41:00,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:00,223 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-11-07 07:41:00,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2021-11-07 07:41:00,224 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-11-07 07:41:00,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 07:41:00,226 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:00,226 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:00,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 07:41:00,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:41:00,438 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:00,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:00,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1906255628, now seen corresponding path program 4 times [2021-11-07 07:41:00,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:41:00,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491258304] [2021-11-07 07:41:00,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:41:00,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:41:00,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:41:00,440 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:41:00,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 07:41:00,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:41:00,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:41:00,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-07 07:41:00,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-07 07:41:01,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:41:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 07:41:06,431 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:41:06,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491258304] [2021-11-07 07:41:06,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491258304] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:41:06,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:06,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 46 [2021-11-07 07:41:06,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632094023] [2021-11-07 07:41:06,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-07 07:41:06,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:41:06,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-07 07:41:06,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 07:41:06,438 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2021-11-07 07:41:07,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:07,974 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-11-07 07:41:07,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 07:41:07,974 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) Word has length 53 [2021-11-07 07:41:07,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:07,976 INFO L225 Difference]: With dead ends: 46 [2021-11-07 07:41:07,976 INFO L226 Difference]: Without dead ends: 40 [2021-11-07 07:41:07,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=414, Invalid=3746, Unknown=0, NotChecked=0, Total=4160 [2021-11-07 07:41:07,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-07 07:41:07,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-07 07:41:07,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-07 07:41:07,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-11-07 07:41:07,985 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 53 [2021-11-07 07:41:07,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:07,986 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-11-07 07:41:07,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2021-11-07 07:41:07,987 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-11-07 07:41:07,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 07:41:07,989 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:07,989 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:07,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:41:08,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:41:08,192 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:08,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:08,192 INFO L85 PathProgramCache]: Analyzing trace with hash 788849844, now seen corresponding path program 5 times [2021-11-07 07:41:08,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:41:08,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996749703] [2021-11-07 07:41:08,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:41:08,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:41:08,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:41:08,196 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:41:08,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 07:41:08,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-07 07:41:08,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:41:08,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-07 07:41:08,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-07 07:41:09,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:41:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-07 07:41:16,132 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:41:16,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996749703] [2021-11-07 07:41:16,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996749703] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:41:16,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:16,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33] total 56 [2021-11-07 07:41:16,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326521114] [2021-11-07 07:41:16,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-07 07:41:16,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:41:16,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-07 07:41:16,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2885, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 07:41:16,144 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-07 07:41:18,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:18,244 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-11-07 07:41:18,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 07:41:18,245 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) Word has length 65 [2021-11-07 07:41:18,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:18,246 INFO L225 Difference]: With dead ends: 52 [2021-11-07 07:41:18,246 INFO L226 Difference]: Without dead ends: 46 [2021-11-07 07:41:18,249 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=554, Invalid=5608, Unknown=0, NotChecked=0, Total=6162 [2021-11-07 07:41:18,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-07 07:41:18,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-07 07:41:18,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-07 07:41:18,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-11-07 07:41:18,256 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 65 [2021-11-07 07:41:18,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:18,257 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-11-07 07:41:18,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-07 07:41:18,258 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-11-07 07:41:18,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 07:41:18,259 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:18,260 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:18,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:41:18,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:41:18,471 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:18,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:18,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1302253684, now seen corresponding path program 6 times [2021-11-07 07:41:18,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:41:18,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434558299] [2021-11-07 07:41:18,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:41:18,473 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:41:18,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:41:18,474 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:41:18,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 07:41:18,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-11-07 07:41:18,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:41:18,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-07 07:41:18,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:19,612 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-07 07:41:19,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:41:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-07 07:41:28,880 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:41:28,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434558299] [2021-11-07 07:41:28,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434558299] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:41:28,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:28,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 39] total 66 [2021-11-07 07:41:28,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339317461] [2021-11-07 07:41:28,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-07 07:41:28,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:41:28,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-07 07:41:28,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=4057, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 07:41:28,884 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) [2021-11-07 07:41:31,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:31,921 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-11-07 07:41:31,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 07:41:31,921 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) Word has length 77 [2021-11-07 07:41:31,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:31,923 INFO L225 Difference]: With dead ends: 58 [2021-11-07 07:41:31,923 INFO L226 Difference]: Without dead ends: 52 [2021-11-07 07:41:31,926 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=710, Invalid=7846, Unknown=0, NotChecked=0, Total=8556 [2021-11-07 07:41:31,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-07 07:41:31,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-07 07:41:31,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-07 07:41:31,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-11-07 07:41:31,934 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 77 [2021-11-07 07:41:31,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:31,935 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-11-07 07:41:31,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) [2021-11-07 07:41:31,936 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-11-07 07:41:31,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 07:41:31,938 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:31,938 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:31,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 07:41:32,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:41:32,144 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:32,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:32,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1287742412, now seen corresponding path program 7 times [2021-11-07 07:41:32,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:41:32,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498801172] [2021-11-07 07:41:32,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:41:32,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:41:32,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:41:32,152 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:41:32,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 07:41:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:32,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-07 07:41:32,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:33,538 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-07 07:41:33,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:41:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-07 07:41:46,284 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:41:46,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498801172] [2021-11-07 07:41:46,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498801172] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:41:46,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:46,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 45] total 76 [2021-11-07 07:41:46,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818036358] [2021-11-07 07:41:46,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-07 07:41:46,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:41:46,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-07 07:41:46,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5429, Unknown=0, NotChecked=0, Total=5700 [2021-11-07 07:41:46,289 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) [2021-11-07 07:41:49,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:49,822 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2021-11-07 07:41:49,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-07 07:41:49,823 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) Word has length 89 [2021-11-07 07:41:49,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:49,825 INFO L225 Difference]: With dead ends: 64 [2021-11-07 07:41:49,825 INFO L226 Difference]: Without dead ends: 58 [2021-11-07 07:41:49,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=882, Invalid=10460, Unknown=0, NotChecked=0, Total=11342 [2021-11-07 07:41:49,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-07 07:41:49,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-07 07:41:49,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 40 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-07 07:41:49,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-11-07 07:41:49,837 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 89 [2021-11-07 07:41:49,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:49,838 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-11-07 07:41:49,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) [2021-11-07 07:41:49,838 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-11-07 07:41:49,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 07:41:49,840 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:49,841 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:49,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 07:41:50,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:41:50,048 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:50,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:50,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1760839668, now seen corresponding path program 8 times [2021-11-07 07:41:50,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:41:50,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532250388] [2021-11-07 07:41:50,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:41:50,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:41:50,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:41:50,051 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:41:50,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 07:41:50,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:41:50,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:41:50,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-07 07:41:50,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:51,777 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-11-07 07:41:51,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:42:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-07 07:42:08,161 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:42:08,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532250388] [2021-11-07 07:42:08,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532250388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:42:08,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:42:08,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 51] total 86 [2021-11-07 07:42:08,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941344110] [2021-11-07 07:42:08,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-07 07:42:08,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:42:08,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-07 07:42:08,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=7001, Unknown=0, NotChecked=0, Total=7310 [2021-11-07 07:42:08,167 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) [2021-11-07 07:42:12,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:12,844 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-11-07 07:42:12,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-07 07:42:12,845 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) Word has length 101 [2021-11-07 07:42:12,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:12,846 INFO L225 Difference]: With dead ends: 70 [2021-11-07 07:42:12,847 INFO L226 Difference]: Without dead ends: 64 [2021-11-07 07:42:12,850 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=1070, Invalid=13450, Unknown=0, NotChecked=0, Total=14520 [2021-11-07 07:42:12,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-07 07:42:12,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-07 07:42:12,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 44 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-07 07:42:12,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2021-11-07 07:42:12,859 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 101 [2021-11-07 07:42:12,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:12,860 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2021-11-07 07:42:12,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) [2021-11-07 07:42:12,860 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2021-11-07 07:42:12,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 07:42:12,863 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:12,863 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:42:12,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:42:13,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:42:13,076 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:13,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:13,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1211116620, now seen corresponding path program 9 times [2021-11-07 07:42:13,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:42:13,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179487354] [2021-11-07 07:42:13,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:42:13,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:42:13,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:42:13,078 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:42:13,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 07:42:13,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-07 07:42:13,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:42:13,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-07 07:42:13,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:42:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-07 07:42:15,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:42:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-07 07:42:35,020 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:42:35,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179487354] [2021-11-07 07:42:35,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179487354] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:42:35,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:42:35,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 57] total 96 [2021-11-07 07:42:35,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518160345] [2021-11-07 07:42:35,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-07 07:42:35,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:42:35,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-07 07:42:35,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=8773, Unknown=0, NotChecked=0, Total=9120 [2021-11-07 07:42:35,022 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) [2021-11-07 07:42:40,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:40,887 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2021-11-07 07:42:40,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-07 07:42:40,888 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) Word has length 113 [2021-11-07 07:42:40,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:40,889 INFO L225 Difference]: With dead ends: 76 [2021-11-07 07:42:40,889 INFO L226 Difference]: Without dead ends: 70 [2021-11-07 07:42:40,892 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=1274, Invalid=16816, Unknown=0, NotChecked=0, Total=18090 [2021-11-07 07:42:40,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-07 07:42:40,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-11-07 07:42:40,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 48 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-07 07:42:40,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-11-07 07:42:40,900 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 113 [2021-11-07 07:42:40,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:40,901 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-11-07 07:42:40,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) [2021-11-07 07:42:40,901 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-11-07 07:42:40,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-07 07:42:40,904 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:40,904 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:42:40,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-07 07:42:41,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:42:41,108 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:41,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:41,108 INFO L85 PathProgramCache]: Analyzing trace with hash 685850484, now seen corresponding path program 10 times [2021-11-07 07:42:41,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:42:41,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250831270] [2021-11-07 07:42:41,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:42:41,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:42:41,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:42:41,110 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:42:41,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 07:42:41,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:42:41,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:42:41,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-07 07:42:41,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:42:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-11-07 07:42:43,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:43:09,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-07 07:43:09,172 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:43:09,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250831270] [2021-11-07 07:43:09,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250831270] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:43:09,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:43:09,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 63] total 106 [2021-11-07 07:43:09,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194714207] [2021-11-07 07:43:09,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-11-07 07:43:09,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:43:09,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-11-07 07:43:09,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=10745, Unknown=0, NotChecked=0, Total=11130 [2021-11-07 07:43:09,176 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 106 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 66 states have internal predecessors, (130), 22 states have call successors, (22), 1 states have call predecessors, (22), 40 states have return successors, (40), 40 states have call predecessors, (40), 22 states have call successors, (40) [2021-11-07 07:43:16,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:16,733 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2021-11-07 07:43:16,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-07 07:43:16,734 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 66 states have internal predecessors, (130), 22 states have call successors, (22), 1 states have call predecessors, (22), 40 states have return successors, (40), 40 states have call predecessors, (40), 22 states have call successors, (40) Word has length 125 [2021-11-07 07:43:16,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:16,736 INFO L225 Difference]: With dead ends: 82 [2021-11-07 07:43:16,736 INFO L226 Difference]: Without dead ends: 76 [2021-11-07 07:43:16,739 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=1494, Invalid=20558, Unknown=0, NotChecked=0, Total=22052 [2021-11-07 07:43:16,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-07 07:43:16,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-07 07:43:16,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 52 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-07 07:43:16,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2021-11-07 07:43:16,748 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 125 [2021-11-07 07:43:16,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:16,749 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2021-11-07 07:43:16,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 66 states have internal predecessors, (130), 22 states have call successors, (22), 1 states have call predecessors, (22), 40 states have return successors, (40), 40 states have call predecessors, (40), 22 states have call successors, (40) [2021-11-07 07:43:16,750 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2021-11-07 07:43:16,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 07:43:16,752 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:16,753 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:16,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 07:43:16,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:43:16,981 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:16,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:16,981 INFO L85 PathProgramCache]: Analyzing trace with hash -2059891916, now seen corresponding path program 11 times [2021-11-07 07:43:16,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:43:16,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650420285] [2021-11-07 07:43:16,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:43:16,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:43:16,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:43:16,984 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:43:16,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 07:43:18,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-11-07 07:43:18,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:18,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-07 07:43:18,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-11-07 07:43:20,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:43:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-07 07:43:50,620 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:43:50,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650420285] [2021-11-07 07:43:50,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650420285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:43:50,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:43:50,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 69] total 116 [2021-11-07 07:43:50,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302582777] [2021-11-07 07:43:50,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-11-07 07:43:50,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:43:50,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-11-07 07:43:50,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=12917, Unknown=0, NotChecked=0, Total=13340 [2021-11-07 07:43:50,624 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 116 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 72 states have internal predecessors, (142), 24 states have call successors, (24), 1 states have call predecessors, (24), 44 states have return successors, (44), 44 states have call predecessors, (44), 24 states have call successors, (44) [2021-11-07 07:43:58,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:58,011 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2021-11-07 07:43:58,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-07 07:43:58,016 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 72 states have internal predecessors, (142), 24 states have call successors, (24), 1 states have call predecessors, (24), 44 states have return successors, (44), 44 states have call predecessors, (44), 24 states have call successors, (44) Word has length 137 [2021-11-07 07:43:58,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:58,017 INFO L225 Difference]: With dead ends: 88 [2021-11-07 07:43:58,017 INFO L226 Difference]: Without dead ends: 82 [2021-11-07 07:43:58,018 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3475 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=1730, Invalid=24676, Unknown=0, NotChecked=0, Total=26406 [2021-11-07 07:43:58,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-07 07:43:58,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-11-07 07:43:58,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.018181818181818) internal successors, (56), 56 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (25), 24 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-07 07:43:58,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2021-11-07 07:43:58,028 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 137 [2021-11-07 07:43:58,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:58,029 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2021-11-07 07:43:58,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 72 states have internal predecessors, (142), 24 states have call successors, (24), 1 states have call predecessors, (24), 44 states have return successors, (44), 44 states have call predecessors, (44), 24 states have call successors, (44) [2021-11-07 07:43:58,029 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2021-11-07 07:43:58,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:43:58,032 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:58,032 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:58,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:58,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:43:58,247 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:58,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:58,248 INFO L85 PathProgramCache]: Analyzing trace with hash -706365708, now seen corresponding path program 12 times [2021-11-07 07:43:58,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:43:58,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70793967] [2021-11-07 07:43:58,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:43:58,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:43:58,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:43:58,250 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:43:58,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 07:43:59,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-11-07 07:43:59,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:59,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-07 07:43:59,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-11-07 07:44:01,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:44:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-07 07:44:32,193 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:44:32,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70793967] [2021-11-07 07:44:32,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [70793967] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:44:32,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:32,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 75] total 126 [2021-11-07 07:44:32,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897155454] [2021-11-07 07:44:32,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-11-07 07:44:32,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:44:32,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-11-07 07:44:32,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=15289, Unknown=0, NotChecked=0, Total=15750 [2021-11-07 07:44:32,197 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 126 states, 125 states have (on average 1.232) internal successors, (154), 78 states have internal predecessors, (154), 26 states have call successors, (26), 1 states have call predecessors, (26), 48 states have return successors, (48), 48 states have call predecessors, (48), 26 states have call successors, (48) [2021-11-07 07:44:40,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:40,334 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2021-11-07 07:44:40,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-07 07:44:40,335 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 1.232) internal successors, (154), 78 states have internal predecessors, (154), 26 states have call successors, (26), 1 states have call predecessors, (26), 48 states have return successors, (48), 48 states have call predecessors, (48), 26 states have call successors, (48) Word has length 149 [2021-11-07 07:44:40,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:40,336 INFO L225 Difference]: With dead ends: 94 [2021-11-07 07:44:40,336 INFO L226 Difference]: Without dead ends: 88 [2021-11-07 07:44:40,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4102 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=1982, Invalid=29170, Unknown=0, NotChecked=0, Total=31152 [2021-11-07 07:44:40,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-07 07:44:40,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-11-07 07:44:40,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 60 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (27), 26 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-07 07:44:40,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2021-11-07 07:44:40,345 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 149 [2021-11-07 07:44:40,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:40,346 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2021-11-07 07:44:40,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 1.232) internal successors, (154), 78 states have internal predecessors, (154), 26 states have call successors, (26), 1 states have call predecessors, (26), 48 states have return successors, (48), 48 states have call predecessors, (48), 26 states have call successors, (48) [2021-11-07 07:44:40,347 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2021-11-07 07:44:40,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-07 07:44:40,349 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:40,349 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:40,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:40,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:44:40,564 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:40,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:40,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1677247156, now seen corresponding path program 13 times [2021-11-07 07:44:40,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:44:40,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247166161] [2021-11-07 07:44:40,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:44:40,565 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:44:40,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:44:40,566 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:44:40,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 07:44:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:41,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-07 07:44:41,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2021-11-07 07:44:44,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:45:18,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-07 07:45:18,903 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:45:18,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247166161] [2021-11-07 07:45:18,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247166161] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:45:18,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:18,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 81] total 136 [2021-11-07 07:45:18,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457959350] [2021-11-07 07:45:18,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2021-11-07 07:45:18,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:45:18,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-11-07 07:45:18,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=17861, Unknown=0, NotChecked=0, Total=18360 [2021-11-07 07:45:18,907 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 136 states, 135 states have (on average 1.2296296296296296) internal successors, (166), 84 states have internal predecessors, (166), 28 states have call successors, (28), 1 states have call predecessors, (28), 52 states have return successors, (52), 52 states have call predecessors, (52), 28 states have call successors, (52) [2021-11-07 07:45:28,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:28,691 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-11-07 07:45:28,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-07 07:45:28,692 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 135 states have (on average 1.2296296296296296) internal successors, (166), 84 states have internal predecessors, (166), 28 states have call successors, (28), 1 states have call predecessors, (28), 52 states have return successors, (52), 52 states have call predecessors, (52), 28 states have call successors, (52) Word has length 161 [2021-11-07 07:45:28,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:28,704 INFO L225 Difference]: With dead ends: 100 [2021-11-07 07:45:28,704 INFO L226 Difference]: Without dead ends: 94 [2021-11-07 07:45:28,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4781 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=2250, Invalid=34040, Unknown=0, NotChecked=0, Total=36290 [2021-11-07 07:45:28,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-07 07:45:28,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-11-07 07:45:28,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 64 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 28 states have return successors, (29), 28 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-07 07:45:28,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2021-11-07 07:45:28,717 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 161 [2021-11-07 07:45:28,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:28,718 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2021-11-07 07:45:28,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 135 states have (on average 1.2296296296296296) internal successors, (166), 84 states have internal predecessors, (166), 28 states have call successors, (28), 1 states have call predecessors, (28), 52 states have return successors, (52), 52 states have call predecessors, (52), 28 states have call successors, (52) [2021-11-07 07:45:28,719 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2021-11-07 07:45:28,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-07 07:45:28,720 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:28,721 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:28,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:28,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:45:28,949 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:28,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:28,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1199460748, now seen corresponding path program 14 times [2021-11-07 07:45:28,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:45:28,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1399503933] [2021-11-07 07:45:28,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:45:28,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:45:28,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:45:28,952 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:45:28,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 07:45:30,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:45:30,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:30,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-07 07:45:30,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2021-11-07 07:45:33,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:46:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1836 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-07 07:46:13,782 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:46:13,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1399503933] [2021-11-07 07:46:13,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1399503933] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:46:13,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:46:13,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 87] total 146 [2021-11-07 07:46:13,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359135172] [2021-11-07 07:46:13,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2021-11-07 07:46:13,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:46:13,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2021-11-07 07:46:13,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=20633, Unknown=0, NotChecked=0, Total=21170 [2021-11-07 07:46:13,786 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 146 states, 145 states have (on average 1.2275862068965517) internal successors, (178), 90 states have internal predecessors, (178), 30 states have call successors, (30), 1 states have call predecessors, (30), 56 states have return successors, (56), 56 states have call predecessors, (56), 30 states have call successors, (56) [2021-11-07 07:46:24,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:24,113 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2021-11-07 07:46:24,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-07 07:46:24,113 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 145 states have (on average 1.2275862068965517) internal successors, (178), 90 states have internal predecessors, (178), 30 states have call successors, (30), 1 states have call predecessors, (30), 56 states have return successors, (56), 56 states have call predecessors, (56), 30 states have call successors, (56) Word has length 173 [2021-11-07 07:46:24,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:24,115 INFO L225 Difference]: With dead ends: 106 [2021-11-07 07:46:24,115 INFO L226 Difference]: Without dead ends: 100 [2021-11-07 07:46:24,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=2534, Invalid=39286, Unknown=0, NotChecked=0, Total=41820 [2021-11-07 07:46:24,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-07 07:46:24,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-11-07 07:46:24,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 68 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 30 states have return successors, (31), 30 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-07 07:46:24,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2021-11-07 07:46:24,124 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 173 [2021-11-07 07:46:24,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:24,124 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2021-11-07 07:46:24,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 145 states have (on average 1.2275862068965517) internal successors, (178), 90 states have internal predecessors, (178), 30 states have call successors, (30), 1 states have call predecessors, (30), 56 states have return successors, (56), 56 states have call predecessors, (56), 30 states have call successors, (56) [2021-11-07 07:46:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2021-11-07 07:46:24,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-07 07:46:24,127 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:24,127 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:24,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 07:46:24,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:46:24,327 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:24,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:24,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1668253132, now seen corresponding path program 15 times [2021-11-07 07:46:24,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:46:24,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860917490] [2021-11-07 07:46:24,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:46:24,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:46:24,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:46:24,329 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:46:24,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 07:46:26,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-11-07 07:46:26,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:46:26,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-07 07:46:26,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-11-07 07:46:28,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:47:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-07 07:47:17,567 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:47:17,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860917490] [2021-11-07 07:47:17,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860917490] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:47:17,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:47:17,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 93] total 156 [2021-11-07 07:47:17,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848901424] [2021-11-07 07:47:17,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2021-11-07 07:47:17,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:47:17,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2021-11-07 07:47:17,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=23605, Unknown=0, NotChecked=0, Total=24180 [2021-11-07 07:47:17,570 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 156 states, 155 states have (on average 1.2258064516129032) internal successors, (190), 96 states have internal predecessors, (190), 32 states have call successors, (32), 1 states have call predecessors, (32), 60 states have return successors, (60), 60 states have call predecessors, (60), 32 states have call successors, (60) [2021-11-07 07:47:30,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:30,478 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2021-11-07 07:47:30,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-07 07:47:30,479 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 155 states have (on average 1.2258064516129032) internal successors, (190), 96 states have internal predecessors, (190), 32 states have call successors, (32), 1 states have call predecessors, (32), 60 states have return successors, (60), 60 states have call predecessors, (60), 32 states have call successors, (60) Word has length 185 [2021-11-07 07:47:30,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:30,480 INFO L225 Difference]: With dead ends: 112 [2021-11-07 07:47:30,480 INFO L226 Difference]: Without dead ends: 106 [2021-11-07 07:47:30,483 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6295 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=2834, Invalid=44908, Unknown=0, NotChecked=0, Total=47742 [2021-11-07 07:47:30,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-07 07:47:30,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-11-07 07:47:30,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 72 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (33), 32 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-07 07:47:30,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2021-11-07 07:47:30,491 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 185 [2021-11-07 07:47:30,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:30,491 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2021-11-07 07:47:30,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 155 states have (on average 1.2258064516129032) internal successors, (190), 96 states have internal predecessors, (190), 32 states have call successors, (32), 1 states have call predecessors, (32), 60 states have return successors, (60), 60 states have call predecessors, (60), 32 states have call successors, (60) [2021-11-07 07:47:30,492 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2021-11-07 07:47:30,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-07 07:47:30,494 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:30,494 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:47:30,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:30,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:47:30,704 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:47:30,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:30,704 INFO L85 PathProgramCache]: Analyzing trace with hash 422913524, now seen corresponding path program 16 times [2021-11-07 07:47:30,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:47:30,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322111026] [2021-11-07 07:47:30,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:47:30,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:47:30,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:47:30,706 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:47:30,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 07:47:32,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:47:32,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-07 07:47:32,798 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 07:47:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:47:33,162 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-11-07 07:47:33,163 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 07:47:33,164 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 07:47:33,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:33,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:47:33,396 INFO L731 BasicCegarLoop]: Path program histogram: [16, 1] [2021-11-07 07:47:33,404 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 07:47:33,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 07:47:33 BoogieIcfgContainer [2021-11-07 07:47:33,602 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 07:47:33,602 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 07:47:33,603 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 07:47:33,603 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 07:47:33,603 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:40:48" (3/4) ... [2021-11-07 07:47:33,606 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-07 07:47:33,716 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d6b1fc-43e0-48e7-8b38-89bd1efbb00c/bin/uautomizer-AkOaLMaTGY/witness.graphml [2021-11-07 07:47:33,716 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 07:47:33,718 INFO L168 Benchmark]: Toolchain (without parser) took 406144.66 ms. Allocated memory was 50.3 MB in the beginning and 195.0 MB in the end (delta: 144.7 MB). Free memory was 27.3 MB in the beginning and 82.1 MB in the end (delta: -54.8 MB). Peak memory consumption was 89.8 MB. Max. memory is 16.1 GB. [2021-11-07 07:47:33,719 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 50.3 MB. Free memory was 31.8 MB in the beginning and 31.8 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 07:47:33,720 INFO L168 Benchmark]: CACSL2BoogieTranslator took 217.13 ms. Allocated memory is still 50.3 MB. Free memory was 27.1 MB in the beginning and 28.7 MB in the end (delta: -1.7 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2021-11-07 07:47:33,720 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.28 ms. Allocated memory was 50.3 MB in the beginning and 62.9 MB in the end (delta: 12.6 MB). Free memory was 28.7 MB in the beginning and 46.6 MB in the end (delta: -17.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 07:47:33,721 INFO L168 Benchmark]: Boogie Preprocessor took 39.59 ms. Allocated memory is still 62.9 MB. Free memory was 46.6 MB in the beginning and 45.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 07:47:33,721 INFO L168 Benchmark]: RCFGBuilder took 337.49 ms. Allocated memory is still 62.9 MB. Free memory was 45.5 MB in the beginning and 36.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 07:47:33,722 INFO L168 Benchmark]: TraceAbstraction took 405359.54 ms. Allocated memory was 62.9 MB in the beginning and 195.0 MB in the end (delta: 132.1 MB). Free memory was 35.7 MB in the beginning and 90.5 MB in the end (delta: -54.7 MB). Peak memory consumption was 79.6 MB. Max. memory is 16.1 GB. [2021-11-07 07:47:33,723 INFO L168 Benchmark]: Witness Printer took 113.94 ms. Allocated memory is still 195.0 MB. Free memory was 90.5 MB in the beginning and 82.1 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 07:47:33,725 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 50.3 MB. Free memory was 31.8 MB in the beginning and 31.8 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 217.13 ms. Allocated memory is still 50.3 MB. Free memory was 27.1 MB in the beginning and 28.7 MB in the end (delta: -1.7 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 69.28 ms. Allocated memory was 50.3 MB in the beginning and 62.9 MB in the end (delta: 12.6 MB). Free memory was 28.7 MB in the beginning and 46.6 MB in the end (delta: -17.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.59 ms. Allocated memory is still 62.9 MB. Free memory was 46.6 MB in the beginning and 45.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 337.49 ms. Allocated memory is still 62.9 MB. Free memory was 45.5 MB in the beginning and 36.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 405359.54 ms. Allocated memory was 62.9 MB in the beginning and 195.0 MB in the end (delta: 132.1 MB). Free memory was 35.7 MB in the beginning and 90.5 MB in the end (delta: -54.7 MB). Peak memory consumption was 79.6 MB. Max. memory is 16.1 GB. * Witness Printer took 113.94 ms. Allocated memory is still 195.0 MB. Free memory was 90.5 MB in the beginning and 82.1 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 36]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L27] int n = __VERIFIER_nondet_int(); [L28] COND FALSE !(n < 1) [L31] CALL, EXPR hanoi(n) VAL [\old(n)=32] [L19] COND FALSE !(n == 1) VAL [\old(n)=32, n=32] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=31] [L19] COND FALSE !(n == 1) VAL [\old(n)=31, n=31] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=30] [L19] COND FALSE !(n == 1) VAL [\old(n)=30, n=30] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=29] [L19] COND FALSE !(n == 1) VAL [\old(n)=29, n=29] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=28] [L19] COND FALSE !(n == 1) VAL [\old(n)=28, n=28] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=27] [L19] COND FALSE !(n == 1) VAL [\old(n)=27, n=27] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=26] [L19] COND FALSE !(n == 1) VAL [\old(n)=26, n=26] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=25] [L19] COND FALSE !(n == 1) VAL [\old(n)=25, n=25] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=24] [L19] COND FALSE !(n == 1) VAL [\old(n)=24, n=24] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=23] [L19] COND FALSE !(n == 1) VAL [\old(n)=23, n=23] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=22] [L19] COND FALSE !(n == 1) VAL [\old(n)=22, n=22] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=21] [L19] COND FALSE !(n == 1) VAL [\old(n)=21, n=21] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=20] [L19] COND FALSE !(n == 1) VAL [\old(n)=20, n=20] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=19] [L19] COND FALSE !(n == 1) VAL [\old(n)=19, n=19] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=18] [L19] COND FALSE !(n == 1) VAL [\old(n)=18, n=18] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=17] [L19] COND FALSE !(n == 1) VAL [\old(n)=17, n=17] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=16] [L19] COND FALSE !(n == 1) VAL [\old(n)=16, n=16] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=15] [L19] COND FALSE !(n == 1) VAL [\old(n)=15, n=15] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=14] [L19] COND FALSE !(n == 1) VAL [\old(n)=14, n=14] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=13] [L19] COND FALSE !(n == 1) VAL [\old(n)=13, n=13] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=12] [L19] COND FALSE !(n == 1) VAL [\old(n)=12, n=12] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=11] [L19] COND FALSE !(n == 1) VAL [\old(n)=11, n=11] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=10] [L19] COND FALSE !(n == 1) VAL [\old(n)=10, n=10] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=9] [L19] COND FALSE !(n == 1) VAL [\old(n)=9, n=9] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=8] [L19] COND FALSE !(n == 1) VAL [\old(n)=8, n=8] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=7] [L19] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=6] [L19] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=5] [L19] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=4] [L19] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=3] [L19] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=2, hanoi(n-1)=1, n=2] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=3, hanoi(n-1)=3, n=3] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=4, hanoi(n-1)=7, n=4] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=5, hanoi(n-1)=15, n=5] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=6, hanoi(n-1)=31, n=6] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=7, hanoi(n-1)=63, n=7] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=8, hanoi(n-1)=127, n=8] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=9, hanoi(n-1)=255, n=9] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=10, hanoi(n-1)=511, n=10] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=11, hanoi(n-1)=1023, n=11] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=12, hanoi(n-1)=2047, n=12] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=13, hanoi(n-1)=4095, n=13] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=14, hanoi(n-1)=8191, n=14] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=15, hanoi(n-1)=16383, n=15] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=16, hanoi(n-1)=32767, n=16] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=17, hanoi(n-1)=65535, n=17] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=18, hanoi(n-1)=131071, n=18] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=19, hanoi(n-1)=262143, n=19] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=20, hanoi(n-1)=524287, n=20] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=21, hanoi(n-1)=1048575, n=21] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=22, hanoi(n-1)=2097151, n=22] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=23, hanoi(n-1)=4194303, n=23] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=24, hanoi(n-1)=8388607, n=24] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=25, hanoi(n-1)=16777215, n=25] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=26, hanoi(n-1)=33554431, n=26] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=27, hanoi(n-1)=67108863, n=27] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=28, hanoi(n-1)=134217727, n=28] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=29, hanoi(n-1)=268435455, n=29] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=30, hanoi(n-1)=536870911, n=30] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=31, hanoi(n-1)=1073741823, n=31] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=32, hanoi(n-1)=2147483647, n=32] [L22] return 2 * (hanoi(n-1)) + 1; [L31] RET, EXPR hanoi(n) [L31] unsigned result = hanoi(n); [L33] COND FALSE !(result+1>0 && result+1 == 1<