./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ --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 2467b918f90fe26ead39772ec36304202be3f16a6c04dfdd5844d39d05599b5a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:53:27,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:53:27,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:53:27,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:53:27,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:53:27,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:53:27,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:53:27,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:53:27,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:53:27,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:53:27,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:53:27,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:53:27,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:53:27,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:53:27,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:53:27,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:53:27,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:53:27,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:53:27,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:53:27,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:53:27,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:53:27,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:53:27,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:53:27,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:53:27,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:53:27,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:53:27,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:53:27,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:53:27,455 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:53:27,457 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:53:27,457 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:53:27,459 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:53:27,461 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:53:27,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:53:27,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:53:27,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:53:27,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:53:27,466 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:53:27,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:53:27,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:53:27,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:53:27,469 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:53:27,516 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:53:27,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:53:27,517 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:53:27,517 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:53:27,518 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:53:27,518 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:53:27,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:53:27,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:53:27,519 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:53:27,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:53:27,520 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:53:27,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:53:27,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:53:27,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:53:27,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:53:27,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:53:27,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:53:27,522 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:53:27,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:53:27,522 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:53:27,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:53:27,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:53:27,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:53:27,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:53:27,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:53:27,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:53:27,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:53:27,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:53:27,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:53:27,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:53:27,525 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:53:27,526 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:53:27,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:53:27,526 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_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2467b918f90fe26ead39772ec36304202be3f16a6c04dfdd5844d39d05599b5a [2022-10-17 10:53:27,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:53:27,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:53:27,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:53:27,861 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:53:27,862 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:53:27,864 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2022-10-17 10:53:27,930 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/data/6313c5b63/0f08ab0cda524c579aaa6cc92a4da945/FLAGd680ced90 [2022-10-17 10:53:28,377 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:53:28,378 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2022-10-17 10:53:28,384 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/data/6313c5b63/0f08ab0cda524c579aaa6cc92a4da945/FLAGd680ced90 [2022-10-17 10:53:28,795 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/data/6313c5b63/0f08ab0cda524c579aaa6cc92a4da945 [2022-10-17 10:53:28,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:53:28,799 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:53:28,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:53:28,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:53:28,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:53:28,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:53:28" (1/1) ... [2022-10-17 10:53:28,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46ae434a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:53:28, skipping insertion in model container [2022-10-17 10:53:28,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:53:28" (1/1) ... [2022-10-17 10:53:28,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:53:28,827 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:53:29,056 WARN L230 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_9b69b254-99a2-4a2e-901d-90c632909649/sv-benchmarks/c/recursive-simple/sum_20x0-2.c[481,494] [2022-10-17 10:53:29,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:53:29,069 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:53:29,083 WARN L230 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_9b69b254-99a2-4a2e-901d-90c632909649/sv-benchmarks/c/recursive-simple/sum_20x0-2.c[481,494] [2022-10-17 10:53:29,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:53:29,097 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:53:29,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:53:29 WrapperNode [2022-10-17 10:53:29,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:53:29,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:53:29,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:53:29,100 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:53:29,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:53:29" (1/1) ... [2022-10-17 10:53:29,114 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:53:29" (1/1) ... [2022-10-17 10:53:29,130 INFO L138 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-10-17 10:53:29,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:53:29,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:53:29,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:53:29,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:53:29,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:53:29" (1/1) ... [2022-10-17 10:53:29,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:53:29" (1/1) ... [2022-10-17 10:53:29,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:53:29" (1/1) ... [2022-10-17 10:53:29,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:53:29" (1/1) ... [2022-10-17 10:53:29,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:53:29" (1/1) ... [2022-10-17 10:53:29,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:53:29" (1/1) ... [2022-10-17 10:53:29,154 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:53:29" (1/1) ... [2022-10-17 10:53:29,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:53:29" (1/1) ... [2022-10-17 10:53:29,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:53:29,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:53:29,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:53:29,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:53:29,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:53:29" (1/1) ... [2022-10-17 10:53:29,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:53:29,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:53:29,201 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:53:29,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:53:29,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:53:29,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:53:29,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:53:29,251 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2022-10-17 10:53:29,251 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2022-10-17 10:53:29,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:53:29,319 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:53:29,321 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:53:29,424 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:53:29,431 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:53:29,431 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 10:53:29,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:53:29 BoogieIcfgContainer [2022-10-17 10:53:29,434 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:53:29,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:53:29,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:53:29,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:53:29,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:53:28" (1/3) ... [2022-10-17 10:53:29,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277ded91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:53:29, skipping insertion in model container [2022-10-17 10:53:29,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:53:29" (2/3) ... [2022-10-17 10:53:29,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277ded91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:53:29, skipping insertion in model container [2022-10-17 10:53:29,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:53:29" (3/3) ... [2022-10-17 10:53:29,444 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_20x0-2.c [2022-10-17 10:53:29,464 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:53:29,464 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:53:29,517 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:53:29,525 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@418c49d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:53:29,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:53:29,529 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 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) [2022-10-17 10:53:29,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 10:53:29,538 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:53:29,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:53:29,539 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:53:29,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:53:29,545 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2022-10-17 10:53:29,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:53:29,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130486560] [2022-10-17 10:53:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:53:29,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:53:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:29,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:29,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:53:29,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:53:29,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130486560] [2022-10-17 10:53:29,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130486560] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:53:29,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:53:29,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:53:29,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331661026] [2022-10-17 10:53:29,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:53:29,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:53:29,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:53:29,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:53:29,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:53:29,876 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 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 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:53:30,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:53:30,086 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-10-17 10:53:30,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:53:30,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-10-17 10:53:30,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:53:30,111 INFO L225 Difference]: With dead ends: 25 [2022-10-17 10:53:30,111 INFO L226 Difference]: Without dead ends: 15 [2022-10-17 10:53:30,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:53:30,118 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:53:30,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 29 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:53:30,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-10-17 10:53:30,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-10-17 10:53:30,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 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) [2022-10-17 10:53:30,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-10-17 10:53:30,160 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-10-17 10:53:30,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:53:30,160 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-10-17 10:53:30,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:53:30,161 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-10-17 10:53:30,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 10:53:30,162 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:53:30,163 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:53:30,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:53:30,163 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:53:30,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:53:30,164 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2022-10-17 10:53:30,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:53:30,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076648398] [2022-10-17 10:53:30,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:53:30,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:53:30,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:30,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:30,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:53:30,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:53:30,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076648398] [2022-10-17 10:53:30,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076648398] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:53:30,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095498814] [2022-10-17 10:53:30,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:53:30,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:53:30,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:53:30,514 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:53:30,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:53:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:30,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:53:30,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:53:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:53:30,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:53:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:53:31,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095498814] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:53:31,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:53:31,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2022-10-17 10:53:31,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900514159] [2022-10-17 10:53:31,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:53:31,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:53:31,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:53:31,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:53:31,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:53:31,020 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-17 10:53:31,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:53:31,074 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-10-17 10:53:31,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:53:31,075 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 16 [2022-10-17 10:53:31,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:53:31,076 INFO L225 Difference]: With dead ends: 22 [2022-10-17 10:53:31,076 INFO L226 Difference]: Without dead ends: 18 [2022-10-17 10:53:31,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:53:31,079 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:53:31,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 25 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:53:31,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-10-17 10:53:31,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-10-17 10:53:31,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:53:31,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-10-17 10:53:31,086 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-10-17 10:53:31,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:53:31,087 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-10-17 10:53:31,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-17 10:53:31,087 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-10-17 10:53:31,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-17 10:53:31,088 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:53:31,089 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:53:31,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:53:31,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:53:31,314 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:53:31,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:53:31,315 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2022-10-17 10:53:31,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:53:31,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669424812] [2022-10-17 10:53:31,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:53:31,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:53:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:31,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:31,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:31,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:31,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:31,638 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 10:53:31,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:53:31,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669424812] [2022-10-17 10:53:31,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669424812] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:53:31,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649603178] [2022-10-17 10:53:31,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:53:31,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:53:31,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:53:31,641 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:53:31,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:53:31,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:53:31,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:53:31,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 10:53:31,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:53:31,771 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 10:53:31,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:53:32,121 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-17 10:53:32,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649603178] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:53:32,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:53:32,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2022-10-17 10:53:32,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579676197] [2022-10-17 10:53:32,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:53:32,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 10:53:32,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:53:32,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 10:53:32,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:53:32,130 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-10-17 10:53:32,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:53:32,217 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-10-17 10:53:32,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:53:32,218 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2022-10-17 10:53:32,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:53:32,220 INFO L225 Difference]: With dead ends: 25 [2022-10-17 10:53:32,220 INFO L226 Difference]: Without dead ends: 21 [2022-10-17 10:53:32,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:53:32,225 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:53:32,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 35 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:53:32,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-10-17 10:53:32,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-10-17 10:53:32,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 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) [2022-10-17 10:53:32,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-10-17 10:53:32,246 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2022-10-17 10:53:32,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:53:32,247 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-10-17 10:53:32,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-10-17 10:53:32,248 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-10-17 10:53:32,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-17 10:53:32,249 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:53:32,249 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:53:32,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:53:32,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:53:32,472 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:53:32,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:53:32,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2022-10-17 10:53:32,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:53:32,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361589264] [2022-10-17 10:53:32,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:53:32,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:53:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:32,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:32,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:32,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:32,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:32,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:53:32,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:53:32,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361589264] [2022-10-17 10:53:32,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361589264] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:53:32,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974171800] [2022-10-17 10:53:32,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:53:32,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:53:32,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:53:32,824 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:53:32,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:53:32,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-17 10:53:32,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:53:32,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-17 10:53:32,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:53:32,928 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:53:32,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:53:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:53:33,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974171800] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:53:33,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:53:33,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 14 [2022-10-17 10:53:33,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792663715] [2022-10-17 10:53:33,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:53:33,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:53:33,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:53:33,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:53:33,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:53:33,450 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2022-10-17 10:53:33,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:53:33,526 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-10-17 10:53:33,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:53:33,527 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 28 [2022-10-17 10:53:33,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:53:33,528 INFO L225 Difference]: With dead ends: 28 [2022-10-17 10:53:33,529 INFO L226 Difference]: Without dead ends: 24 [2022-10-17 10:53:33,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:53:33,531 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:53:33,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 41 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:53:33,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-10-17 10:53:33,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-10-17 10:53:33,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 10:53:33,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-10-17 10:53:33,538 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2022-10-17 10:53:33,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:53:33,538 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-10-17 10:53:33,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2022-10-17 10:53:33,539 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-10-17 10:53:33,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-17 10:53:33,540 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:53:33,540 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:53:33,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:53:33,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:53:33,755 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:53:33,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:53:33,756 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2022-10-17 10:53:33,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:53:33,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257699748] [2022-10-17 10:53:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:53:33,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:53:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:33,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:33,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:33,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:33,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:34,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-10-17 10:53:34,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:53:34,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257699748] [2022-10-17 10:53:34,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257699748] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:53:34,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670172606] [2022-10-17 10:53:34,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 10:53:34,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:53:34,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:53:34,056 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:53:34,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:53:34,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 10:53:34,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:53:34,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 10:53:34,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:53:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-10-17 10:53:34,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:53:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 10:53:34,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670172606] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:53:34,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:53:34,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2022-10-17 10:53:34,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401601425] [2022-10-17 10:53:34,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:53:34,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-17 10:53:34,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:53:34,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-17 10:53:34,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-10-17 10:53:34,996 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2022-10-17 10:53:35,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:53:35,073 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-10-17 10:53:35,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:53:35,074 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 34 [2022-10-17 10:53:35,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:53:35,075 INFO L225 Difference]: With dead ends: 31 [2022-10-17 10:53:35,076 INFO L226 Difference]: Without dead ends: 27 [2022-10-17 10:53:35,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2022-10-17 10:53:35,078 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:53:35,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 47 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:53:35,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-10-17 10:53:35,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-10-17 10:53:35,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 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) [2022-10-17 10:53:35,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-10-17 10:53:35,094 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2022-10-17 10:53:35,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:53:35,095 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-10-17 10:53:35,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2022-10-17 10:53:35,095 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-10-17 10:53:35,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-10-17 10:53:35,099 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:53:35,100 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:53:35,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:53:35,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:53:35,323 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:53:35,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:53:35,324 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2022-10-17 10:53:35,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:53:35,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747582835] [2022-10-17 10:53:35,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:53:35,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:53:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:35,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:35,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:35,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:35,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:35,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:35,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:35,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-10-17 10:53:35,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:53:35,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747582835] [2022-10-17 10:53:35,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747582835] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:53:35,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787196566] [2022-10-17 10:53:35,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-17 10:53:35,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:53:35,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:53:35,679 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:53:35,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:53:35,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-10-17 10:53:35,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:53:35,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-17 10:53:35,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:53:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-10-17 10:53:35,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:53:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:53:36,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787196566] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:53:36,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:53:36,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 18 [2022-10-17 10:53:36,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664440722] [2022-10-17 10:53:36,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:53:36,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-17 10:53:36,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:53:36,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-17 10:53:36,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:53:36,979 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2022-10-17 10:53:37,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:53:37,114 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-10-17 10:53:37,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:53:37,116 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 40 [2022-10-17 10:53:37,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:53:37,118 INFO L225 Difference]: With dead ends: 34 [2022-10-17 10:53:37,120 INFO L226 Difference]: Without dead ends: 30 [2022-10-17 10:53:37,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2022-10-17 10:53:37,123 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:53:37,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 57 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:53:37,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-10-17 10:53:37,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-10-17 10:53:37,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-17 10:53:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-10-17 10:53:37,134 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2022-10-17 10:53:37,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:53:37,137 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-10-17 10:53:37,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2022-10-17 10:53:37,138 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-10-17 10:53:37,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-10-17 10:53:37,140 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:53:37,140 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:53:37,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:53:37,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:53:37,348 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:53:37,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:53:37,348 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2022-10-17 10:53:37,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:53:37,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429926967] [2022-10-17 10:53:37,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:53:37,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:53:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:37,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:37,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:37,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:37,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:37,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:37,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:37,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:37,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:37,812 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-10-17 10:53:37,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:53:37,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429926967] [2022-10-17 10:53:37,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429926967] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:53:37,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55991750] [2022-10-17 10:53:37,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-10-17 10:53:37,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:53:37,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:53:37,815 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:53:37,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:53:37,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-10-17 10:53:37,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:53:37,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-17 10:53:37,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:53:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-10-17 10:53:37,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:53:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-17 10:53:39,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55991750] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:53:39,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:53:39,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 20 [2022-10-17 10:53:39,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398132620] [2022-10-17 10:53:39,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:53:39,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-10-17 10:53:39,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:53:39,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-10-17 10:53:39,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-10-17 10:53:39,566 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2022-10-17 10:53:39,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:53:39,711 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-10-17 10:53:39,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 10:53:39,712 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 46 [2022-10-17 10:53:39,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:53:39,714 INFO L225 Difference]: With dead ends: 37 [2022-10-17 10:53:39,714 INFO L226 Difference]: Without dead ends: 33 [2022-10-17 10:53:39,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2022-10-17 10:53:39,716 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 97 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:53:39,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 67 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:53:39,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-10-17 10:53:39,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-10-17 10:53:39,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 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) [2022-10-17 10:53:39,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-10-17 10:53:39,722 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2022-10-17 10:53:39,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:53:39,723 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-10-17 10:53:39,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2022-10-17 10:53:39,724 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-10-17 10:53:39,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-10-17 10:53:39,725 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:53:39,725 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:53:39,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:53:39,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:53:39,943 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:53:39,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:53:39,944 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2022-10-17 10:53:39,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:53:39,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718078408] [2022-10-17 10:53:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:53:39,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:53:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:40,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:40,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:40,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:40,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:40,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:40,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:40,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:40,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:40,501 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-10-17 10:53:40,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:53:40,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718078408] [2022-10-17 10:53:40,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718078408] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:53:40,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431949624] [2022-10-17 10:53:40,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-10-17 10:53:40,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:53:40,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:53:40,504 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:53:40,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 10:53:40,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:40,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-17 10:53:40,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:53:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-10-17 10:53:40,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:53:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-10-17 10:53:42,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431949624] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:53:42,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:53:42,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 22 [2022-10-17 10:53:42,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228714918] [2022-10-17 10:53:42,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:53:42,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-10-17 10:53:42,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:53:42,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-10-17 10:53:42,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-10-17 10:53:42,889 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2022-10-17 10:53:43,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:53:43,039 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-10-17 10:53:43,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 10:53:43,040 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 52 [2022-10-17 10:53:43,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:53:43,043 INFO L225 Difference]: With dead ends: 40 [2022-10-17 10:53:43,043 INFO L226 Difference]: Without dead ends: 36 [2022-10-17 10:53:43,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2022-10-17 10:53:43,045 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 150 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:53:43,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 61 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:53:43,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-10-17 10:53:43,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-10-17 10:53:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2022-10-17 10:53:43,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-10-17 10:53:43,056 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2022-10-17 10:53:43,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:53:43,056 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-10-17 10:53:43,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2022-10-17 10:53:43,057 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-10-17 10:53:43,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-10-17 10:53:43,060 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:53:43,061 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:53:43,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-10-17 10:53:43,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-10-17 10:53:43,281 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:53:43,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:53:43,282 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2022-10-17 10:53:43,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:53:43,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644146169] [2022-10-17 10:53:43,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:53:43,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:53:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:43,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:43,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:43,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:43,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:43,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:43,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:43,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:43,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:43,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:43,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-10-17 10:53:43,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:53:43,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644146169] [2022-10-17 10:53:43,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644146169] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:53:43,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163294917] [2022-10-17 10:53:43,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:53:43,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:53:43,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:53:43,899 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:53:43,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 10:53:44,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:53:44,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:53:44,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 20 conjunts are in the unsatisfiable core [2022-10-17 10:53:44,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:53:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-10-17 10:53:44,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:53:46,854 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-10-17 10:53:46,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163294917] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:53:46,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:53:46,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 24 [2022-10-17 10:53:46,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725645321] [2022-10-17 10:53:46,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:53:46,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-17 10:53:46,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:53:46,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-17 10:53:46,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2022-10-17 10:53:46,863 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2022-10-17 10:53:47,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:53:47,005 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2022-10-17 10:53:47,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 10:53:47,005 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 58 [2022-10-17 10:53:47,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:53:47,010 INFO L225 Difference]: With dead ends: 43 [2022-10-17 10:53:47,011 INFO L226 Difference]: Without dead ends: 39 [2022-10-17 10:53:47,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2022-10-17 10:53:47,014 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 63 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:53:47,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 79 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:53:47,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-10-17 10:53:47,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-10-17 10:53:47,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 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) [2022-10-17 10:53:47,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-10-17 10:53:47,033 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2022-10-17 10:53:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:53:47,033 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-10-17 10:53:47,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2022-10-17 10:53:47,034 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-10-17 10:53:47,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-10-17 10:53:47,039 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:53:47,039 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:53:47,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-10-17 10:53:47,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:53:47,253 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:53:47,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:53:47,253 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2022-10-17 10:53:47,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:53:47,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370901212] [2022-10-17 10:53:47,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:53:47,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:53:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:47,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:47,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:47,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:47,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:47,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:47,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:47,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:47,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:47,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:47,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:47,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:47,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:47,978 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-10-17 10:53:47,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:53:47,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370901212] [2022-10-17 10:53:47,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370901212] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:53:47,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002465065] [2022-10-17 10:53:47,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:53:47,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:53:47,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:53:47,983 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:53:47,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-17 10:53:48,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-10-17 10:53:48,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:53:48,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 22 conjunts are in the unsatisfiable core [2022-10-17 10:53:48,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:53:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-10-17 10:53:48,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:53:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-10-17 10:53:51,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002465065] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:53:51,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:53:51,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 26 [2022-10-17 10:53:51,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165135958] [2022-10-17 10:53:51,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:53:51,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-10-17 10:53:51,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:53:51,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-10-17 10:53:51,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2022-10-17 10:53:51,649 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2022-10-17 10:53:51,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:53:51,819 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-10-17 10:53:51,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:53:51,820 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) Word has length 64 [2022-10-17 10:53:51,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:53:51,821 INFO L225 Difference]: With dead ends: 46 [2022-10-17 10:53:51,821 INFO L226 Difference]: Without dead ends: 42 [2022-10-17 10:53:51,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 125 SyntacticMatches, 10 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=411, Invalid=849, Unknown=0, NotChecked=0, Total=1260 [2022-10-17 10:53:51,823 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 174 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:53:51,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 89 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:53:51,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-10-17 10:53:51,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-10-17 10:53:51,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2022-10-17 10:53:51,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-10-17 10:53:51,829 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2022-10-17 10:53:51,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:53:51,829 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-10-17 10:53:51,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2022-10-17 10:53:51,830 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-10-17 10:53:51,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-10-17 10:53:51,831 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:53:51,831 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:53:51,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-17 10:53:52,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-17 10:53:52,047 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:53:52,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:53:52,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2022-10-17 10:53:52,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:53:52,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343732153] [2022-10-17 10:53:52,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:53:52,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:53:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:52,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:52,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:52,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:52,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:52,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:52,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:52,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:52,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:52,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:52,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:52,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-10-17 10:53:52,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:53:52,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343732153] [2022-10-17 10:53:52,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343732153] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:53:52,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921659362] [2022-10-17 10:53:52,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 10:53:52,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:53:52,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:53:52,851 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:53:52,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-17 10:53:53,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 10:53:53,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:53:53,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-17 10:53:53,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:53:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-10-17 10:53:53,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:53:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-10-17 10:53:57,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921659362] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:53:57,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:53:57,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 28 [2022-10-17 10:53:57,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516333937] [2022-10-17 10:53:57,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:53:57,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-10-17 10:53:57,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:53:57,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-10-17 10:53:57,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2022-10-17 10:53:57,462 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2022-10-17 10:53:57,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:53:57,626 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2022-10-17 10:53:57,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-17 10:53:57,627 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) Word has length 70 [2022-10-17 10:53:57,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:53:57,628 INFO L225 Difference]: With dead ends: 49 [2022-10-17 10:53:57,628 INFO L226 Difference]: Without dead ends: 45 [2022-10-17 10:53:57,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 137 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=484, Invalid=998, Unknown=0, NotChecked=0, Total=1482 [2022-10-17 10:53:57,630 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 78 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:53:57,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 91 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:53:57,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-10-17 10:53:57,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-10-17 10:53:57,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 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) [2022-10-17 10:53:57,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-10-17 10:53:57,635 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2022-10-17 10:53:57,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:53:57,636 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-10-17 10:53:57,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2022-10-17 10:53:57,637 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-10-17 10:53:57,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-10-17 10:53:57,637 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:53:57,638 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:53:57,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-17 10:53:57,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-17 10:53:57,862 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:53:57,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:53:57,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2022-10-17 10:53:57,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:53:57,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28438391] [2022-10-17 10:53:57,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:53:57,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:53:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:57,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:58,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:58,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:58,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:58,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:58,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:58,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:58,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:58,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:58,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:58,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:58,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:53:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:53:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-10-17 10:53:58,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:53:58,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28438391] [2022-10-17 10:53:58,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28438391] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:53:58,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647469295] [2022-10-17 10:53:58,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-17 10:53:58,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:53:58,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:53:58,791 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:53:58,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b69b254-99a2-4a2e-901d-90c632909649/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process