./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_5a.c.cil.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_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/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_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/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_dc06daef-9637-4617-8544-9d5e69647758/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 f6c91769726962c1478685c30d57ac239987d5f8a5f6832d1d60b9c031f35855 --- 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 10:46:48,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:46:48,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:46:48,386 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:46:48,386 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:46:48,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:46:48,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:46:48,400 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:46:48,403 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:46:48,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:46:48,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:46:48,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:46:48,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:46:48,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:46:48,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:46:48,420 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:46:48,421 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:46:48,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:46:48,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:46:48,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:46:48,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:46:48,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:46:48,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:46:48,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:46:48,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:46:48,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:46:48,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:46:48,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:46:48,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:46:48,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:46:48,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:46:48,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:46:48,459 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:46:48,460 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:46:48,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:46:48,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:46:48,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:46:48,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:46:48,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:46:48,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:46:48,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:46:48,466 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:46:48,506 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:46:48,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:46:48,507 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:46:48,507 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:46:48,508 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:46:48,508 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:46:48,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:46:48,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:46:48,510 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:46:48,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:46:48,511 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:46:48,511 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:46:48,511 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:46:48,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:46:48,512 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:46:48,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:46:48,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:46:48,513 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:46:48,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:46:48,513 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:46:48,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:46:48,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:46:48,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:46:48,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:46:48,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:46:48,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:46:48,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:46:48,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:46:48,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:46:48,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:46:48,518 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:46:48,518 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:46:48,518 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:46:48,518 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_dc06daef-9637-4617-8544-9d5e69647758/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6c91769726962c1478685c30d57ac239987d5f8a5f6832d1d60b9c031f35855 [2022-10-17 10:46:48,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:46:48,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:46:48,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:46:48,821 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:46:48,822 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:46:48,823 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c [2022-10-17 10:46:48,910 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/data/62fc097fa/471255fab4024bcdb2b9344640bbd4f9/FLAG635885dc0 [2022-10-17 10:46:49,352 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:46:49,353 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c [2022-10-17 10:46:49,362 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/data/62fc097fa/471255fab4024bcdb2b9344640bbd4f9/FLAG635885dc0 [2022-10-17 10:46:49,744 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/data/62fc097fa/471255fab4024bcdb2b9344640bbd4f9 [2022-10-17 10:46:49,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:46:49,748 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:46:49,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:46:49,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:46:49,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:46:49,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:46:49" (1/1) ... [2022-10-17 10:46:49,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27cd5c55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:46:49, skipping insertion in model container [2022-10-17 10:46:49,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:46:49" (1/1) ... [2022-10-17 10:46:49,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:46:49,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:46:49,966 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_dc06daef-9637-4617-8544-9d5e69647758/sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c[728,741] [2022-10-17 10:46:50,028 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:46:50,041 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:46:50,064 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_dc06daef-9637-4617-8544-9d5e69647758/sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c[728,741] [2022-10-17 10:46:50,131 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:46:50,147 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:46:50,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:46:50 WrapperNode [2022-10-17 10:46:50,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:46:50,149 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:46:50,149 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:46:50,149 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:46:50,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:46:50" (1/1) ... [2022-10-17 10:46:50,170 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:46:50" (1/1) ... [2022-10-17 10:46:50,196 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 178 [2022-10-17 10:46:50,196 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:46:50,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:46:50,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:46:50,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:46:50,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:46:50" (1/1) ... [2022-10-17 10:46:50,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:46:50" (1/1) ... [2022-10-17 10:46:50,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:46:50" (1/1) ... [2022-10-17 10:46:50,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:46:50" (1/1) ... [2022-10-17 10:46:50,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:46:50" (1/1) ... [2022-10-17 10:46:50,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:46:50" (1/1) ... [2022-10-17 10:46:50,224 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:46:50" (1/1) ... [2022-10-17 10:46:50,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:46:50" (1/1) ... [2022-10-17 10:46:50,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:46:50,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:46:50,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:46:50,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:46:50,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:46:50" (1/1) ... [2022-10-17 10:46:50,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:46:50,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:46:50,263 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:46:50,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:46:50,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:46:50,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:46:50,329 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-10-17 10:46:50,330 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-10-17 10:46:50,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:46:50,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:46:50,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 10:46:50,331 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 10:46:50,442 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:46:50,444 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:46:50,954 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:46:50,967 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:46:50,969 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 10:46:50,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:46:50 BoogieIcfgContainer [2022-10-17 10:46:50,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:46:50,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:46:50,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:46:50,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:46:50,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:46:49" (1/3) ... [2022-10-17 10:46:50,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b060a0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:46:50, skipping insertion in model container [2022-10-17 10:46:50,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:46:50" (2/3) ... [2022-10-17 10:46:50,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b060a0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:46:50, skipping insertion in model container [2022-10-17 10:46:50,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:46:50" (3/3) ... [2022-10-17 10:46:50,985 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2022-10-17 10:46:51,008 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:46:51,008 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:46:51,081 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:46:51,088 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;@3c4e9e5a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:46:51,089 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:46:51,095 INFO L276 IsEmpty]: Start isEmpty. Operand has 88 states, 79 states have (on average 1.7088607594936709) internal successors, (135), 81 states have internal predecessors, (135), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-17 10:46:51,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-10-17 10:46:51,106 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:46:51,107 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:46:51,107 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:46:51,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:46:51,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1735976372, now seen corresponding path program 1 times [2022-10-17 10:46:51,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:46:51,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180248148] [2022-10-17 10:46:51,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:46:51,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:46:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:51,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:46:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:51,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:46:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:51,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:46:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:51,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:46:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-10-17 10:46:51,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:46:51,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180248148] [2022-10-17 10:46:51,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180248148] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:46:51,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:46:51,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:46:51,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519848408] [2022-10-17 10:46:51,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:46:51,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:46:51,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:46:51,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:46:51,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:46:51,616 INFO L87 Difference]: Start difference. First operand has 88 states, 79 states have (on average 1.7088607594936709) internal successors, (135), 81 states have internal predecessors, (135), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:46:51,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:46:51,740 INFO L93 Difference]: Finished difference Result 225 states and 381 transitions. [2022-10-17 10:46:51,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:46:51,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2022-10-17 10:46:51,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:46:51,753 INFO L225 Difference]: With dead ends: 225 [2022-10-17 10:46:51,753 INFO L226 Difference]: Without dead ends: 90 [2022-10-17 10:46:51,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:46:51,767 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 96 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:46:51,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 338 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:46:51,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-10-17 10:46:51,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2022-10-17 10:46:51,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 75 states have (on average 1.5066666666666666) internal successors, (113), 75 states have internal predecessors, (113), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-17 10:46:51,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 122 transitions. [2022-10-17 10:46:51,813 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 122 transitions. Word has length 42 [2022-10-17 10:46:51,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:46:51,814 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 122 transitions. [2022-10-17 10:46:51,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:46:51,814 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 122 transitions. [2022-10-17 10:46:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-17 10:46:51,817 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:46:51,818 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:46:51,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:46:51,818 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:46:51,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:46:51,819 INFO L85 PathProgramCache]: Analyzing trace with hash 235851622, now seen corresponding path program 1 times [2022-10-17 10:46:51,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:46:51,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919252918] [2022-10-17 10:46:51,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:46:51,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:46:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:51,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:46:51,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:51,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:46:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:51,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:46:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:51,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:46:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-10-17 10:46:52,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:46:52,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919252918] [2022-10-17 10:46:52,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919252918] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:46:52,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:46:52,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:46:52,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836983175] [2022-10-17 10:46:52,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:46:52,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:46:52,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:46:52,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:46:52,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:46:52,016 INFO L87 Difference]: Start difference. First operand 82 states and 122 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:46:52,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:46:52,069 INFO L93 Difference]: Finished difference Result 139 states and 208 transitions. [2022-10-17 10:46:52,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:46:52,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-10-17 10:46:52,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:46:52,073 INFO L225 Difference]: With dead ends: 139 [2022-10-17 10:46:52,073 INFO L226 Difference]: Without dead ends: 90 [2022-10-17 10:46:52,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 10:46:52,075 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 151 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:46:52,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 437 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:46:52,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-10-17 10:46:52,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2022-10-17 10:46:52,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 75 states have (on average 1.4933333333333334) internal successors, (112), 75 states have internal predecessors, (112), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-17 10:46:52,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 121 transitions. [2022-10-17 10:46:52,089 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 121 transitions. Word has length 44 [2022-10-17 10:46:52,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:46:52,090 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 121 transitions. [2022-10-17 10:46:52,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:46:52,091 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 121 transitions. [2022-10-17 10:46:52,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-17 10:46:52,093 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:46:52,093 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:46:52,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:46:52,094 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:46:52,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:46:52,094 INFO L85 PathProgramCache]: Analyzing trace with hash -350954392, now seen corresponding path program 1 times [2022-10-17 10:46:52,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:46:52,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29194070] [2022-10-17 10:46:52,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:46:52,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:46:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:52,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:46:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:52,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:46:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:52,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:46:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:52,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:46:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-17 10:46:52,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:46:52,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29194070] [2022-10-17 10:46:52,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29194070] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:46:52,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612964106] [2022-10-17 10:46:52,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:46:52,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:46:52,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:46:52,352 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:46:52,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:46:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:52,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-17 10:46:52,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:46:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:46:52,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:46:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-17 10:46:52,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612964106] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:46:52,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:46:52,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 9] total 16 [2022-10-17 10:46:52,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060372409] [2022-10-17 10:46:52,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:46:52,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:46:52,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:46:52,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:46:52,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-10-17 10:46:52,841 INFO L87 Difference]: Start difference. First operand 82 states and 121 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:46:52,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:46:52,966 INFO L93 Difference]: Finished difference Result 138 states and 202 transitions. [2022-10-17 10:46:52,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:46:52,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-10-17 10:46:52,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:46:52,974 INFO L225 Difference]: With dead ends: 138 [2022-10-17 10:46:52,974 INFO L226 Difference]: Without dead ends: 133 [2022-10-17 10:46:52,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:46:52,979 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 129 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:46:52,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 668 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:46:52,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-10-17 10:46:53,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 130. [2022-10-17 10:46:53,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 122 states have (on average 1.4754098360655739) internal successors, (180), 122 states have internal predecessors, (180), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-10-17 10:46:53,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 193 transitions. [2022-10-17 10:46:53,024 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 193 transitions. Word has length 44 [2022-10-17 10:46:53,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:46:53,025 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 193 transitions. [2022-10-17 10:46:53,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:46:53,025 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 193 transitions. [2022-10-17 10:46:53,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-10-17 10:46:53,028 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:46:53,031 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:46:53,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-17 10:46:53,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:46:53,245 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:46:53,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:46:53,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1438229074, now seen corresponding path program 1 times [2022-10-17 10:46:53,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:46:53,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781709383] [2022-10-17 10:46:53,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:46:53,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:46:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:53,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:46:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:53,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:46:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:53,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:46:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:53,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:46:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-17 10:46:53,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:46:53,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781709383] [2022-10-17 10:46:53,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781709383] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:46:53,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470639464] [2022-10-17 10:46:53,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:46:53,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:46:53,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:46:53,412 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:46:53,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:46:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:53,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 10:46:53,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:46:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-17 10:46:53,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:46:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-10-17 10:46:53,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470639464] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:46:53,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:46:53,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 7] total 13 [2022-10-17 10:46:53,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341744524] [2022-10-17 10:46:53,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:46:53,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:46:53,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:46:53,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:46:53,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-10-17 10:46:53,699 INFO L87 Difference]: Start difference. First operand 130 states and 193 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:46:53,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:46:53,766 INFO L93 Difference]: Finished difference Result 147 states and 211 transitions. [2022-10-17 10:46:53,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:46:53,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2022-10-17 10:46:53,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:46:53,770 INFO L225 Difference]: With dead ends: 147 [2022-10-17 10:46:53,770 INFO L226 Difference]: Without dead ends: 141 [2022-10-17 10:46:53,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:46:53,778 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 16 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:46:53,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 461 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:46:53,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-10-17 10:46:53,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2022-10-17 10:46:53,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 131 states have (on average 1.450381679389313) internal successors, (190), 131 states have internal predecessors, (190), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-10-17 10:46:53,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 203 transitions. [2022-10-17 10:46:53,806 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 203 transitions. Word has length 46 [2022-10-17 10:46:53,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:46:53,806 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 203 transitions. [2022-10-17 10:46:53,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:46:53,807 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 203 transitions. [2022-10-17 10:46:53,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-10-17 10:46:53,813 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:46:53,813 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:46:53,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:46:54,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:46:54,014 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:46:54,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:46:54,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1380970772, now seen corresponding path program 1 times [2022-10-17 10:46:54,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:46:54,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624016177] [2022-10-17 10:46:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:46:54,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:46:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:54,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:46:54,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:54,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:46:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:54,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:46:54,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:54,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:46:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-10-17 10:46:54,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:46:54,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624016177] [2022-10-17 10:46:54,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624016177] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:46:54,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:46:54,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:46:54,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627459560] [2022-10-17 10:46:54,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:46:54,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:46:54,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:46:54,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:46:54,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:46:54,185 INFO L87 Difference]: Start difference. First operand 139 states and 203 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:46:54,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:46:54,261 INFO L93 Difference]: Finished difference Result 153 states and 223 transitions. [2022-10-17 10:46:54,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:46:54,261 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2022-10-17 10:46:54,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:46:54,264 INFO L225 Difference]: With dead ends: 153 [2022-10-17 10:46:54,264 INFO L226 Difference]: Without dead ends: 142 [2022-10-17 10:46:54,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:46:54,265 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 38 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:46:54,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 662 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:46:54,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-10-17 10:46:54,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2022-10-17 10:46:54,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 126 states have (on average 1.4365079365079365) internal successors, (181), 126 states have internal predecessors, (181), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-10-17 10:46:54,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 194 transitions. [2022-10-17 10:46:54,286 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 194 transitions. Word has length 46 [2022-10-17 10:46:54,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:46:54,287 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 194 transitions. [2022-10-17 10:46:54,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:46:54,287 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 194 transitions. [2022-10-17 10:46:54,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-10-17 10:46:54,289 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:46:54,289 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:46:54,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:46:54,289 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:46:54,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:46:54,290 INFO L85 PathProgramCache]: Analyzing trace with hash -553271399, now seen corresponding path program 1 times [2022-10-17 10:46:54,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:46:54,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438172405] [2022-10-17 10:46:54,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:46:54,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:46:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:54,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:46:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:54,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:46:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:54,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:46:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:54,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:46:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-17 10:46:54,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:46:54,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438172405] [2022-10-17 10:46:54,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438172405] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:46:54,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256577695] [2022-10-17 10:46:54,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:46:54,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:46:54,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:46:54,493 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:46:54,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:46:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:54,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-17 10:46:54,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:46:54,676 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-17 10:46:54,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:46:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-17 10:46:54,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256577695] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:46:54,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:46:54,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 14 [2022-10-17 10:46:54,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216499630] [2022-10-17 10:46:54,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:46:54,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:46:54,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:46:54,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:46:54,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:46:54,864 INFO L87 Difference]: Start difference. First operand 134 states and 194 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 11 states have internal predecessors, (68), 4 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2022-10-17 10:46:56,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:46:56,000 INFO L93 Difference]: Finished difference Result 563 states and 915 transitions. [2022-10-17 10:46:56,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-10-17 10:46:56,001 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 11 states have internal predecessors, (68), 4 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 48 [2022-10-17 10:46:56,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:46:56,010 INFO L225 Difference]: With dead ends: 563 [2022-10-17 10:46:56,010 INFO L226 Difference]: Without dead ends: 423 [2022-10-17 10:46:56,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=425, Invalid=1555, Unknown=0, NotChecked=0, Total=1980 [2022-10-17 10:46:56,021 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 496 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:46:56,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 862 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:46:56,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-10-17 10:46:56,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 173. [2022-10-17 10:46:56,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 159 states have (on average 1.4465408805031446) internal successors, (230), 160 states have internal predecessors, (230), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (23), 8 states have call predecessors, (23), 7 states have call successors, (23) [2022-10-17 10:46:56,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 261 transitions. [2022-10-17 10:46:56,061 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 261 transitions. Word has length 48 [2022-10-17 10:46:56,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:46:56,062 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 261 transitions. [2022-10-17 10:46:56,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 11 states have internal predecessors, (68), 4 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2022-10-17 10:46:56,063 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 261 transitions. [2022-10-17 10:46:56,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-10-17 10:46:56,065 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:46:56,065 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:46:56,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:46:56,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:46:56,285 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:46:56,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:46:56,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1980264638, now seen corresponding path program 1 times [2022-10-17 10:46:56,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:46:56,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114903213] [2022-10-17 10:46:56,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:46:56,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:46:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:56,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:46:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:56,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:46:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:56,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:46:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:56,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-10-17 10:46:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:56,383 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-10-17 10:46:56,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:46:56,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114903213] [2022-10-17 10:46:56,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114903213] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:46:56,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888155919] [2022-10-17 10:46:56,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:46:56,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:46:56,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:46:56,389 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:46:56,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:46:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:56,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:46:56,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:46:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 10:46:56,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:46:56,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888155919] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:46:56,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:46:56,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-10-17 10:46:56,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786622352] [2022-10-17 10:46:56,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:46:56,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:46:56,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:46:56,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:46:56,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:46:56,492 INFO L87 Difference]: Start difference. First operand 173 states and 261 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:46:56,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:46:56,589 INFO L93 Difference]: Finished difference Result 344 states and 521 transitions. [2022-10-17 10:46:56,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:46:56,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-10-17 10:46:56,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:46:56,595 INFO L225 Difference]: With dead ends: 344 [2022-10-17 10:46:56,595 INFO L226 Difference]: Without dead ends: 189 [2022-10-17 10:46:56,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:46:56,597 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 27 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:46:56,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 298 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:46:56,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-10-17 10:46:56,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 177. [2022-10-17 10:46:56,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 162 states have (on average 1.4444444444444444) internal successors, (234), 164 states have internal predecessors, (234), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2022-10-17 10:46:56,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 269 transitions. [2022-10-17 10:46:56,618 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 269 transitions. Word has length 55 [2022-10-17 10:46:56,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:46:56,618 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 269 transitions. [2022-10-17 10:46:56,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:46:56,619 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 269 transitions. [2022-10-17 10:46:56,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-10-17 10:46:56,621 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:46:56,621 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:46:56,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:46:56,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:46:56,839 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:46:56,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:46:56,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1886415845, now seen corresponding path program 1 times [2022-10-17 10:46:56,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:46:56,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887933240] [2022-10-17 10:46:56,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:46:56,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:46:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:56,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:46:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:56,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-10-17 10:46:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:56,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-10-17 10:46:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:56,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-10-17 10:46:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-10-17 10:46:56,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:46:56,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887933240] [2022-10-17 10:46:56,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887933240] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:46:56,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852162185] [2022-10-17 10:46:56,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:46:56,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:46:56,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:46:56,933 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:46:56,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:46:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:57,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 10:46:57,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:46:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-10-17 10:46:57,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:46:57,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852162185] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:46:57,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:46:57,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-10-17 10:46:57,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383510277] [2022-10-17 10:46:57,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:46:57,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:46:57,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:46:57,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:46:57,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:46:57,028 INFO L87 Difference]: Start difference. First operand 177 states and 269 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:46:57,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:46:57,082 INFO L93 Difference]: Finished difference Result 356 states and 560 transitions. [2022-10-17 10:46:57,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:46:57,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-10-17 10:46:57,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:46:57,085 INFO L225 Difference]: With dead ends: 356 [2022-10-17 10:46:57,085 INFO L226 Difference]: Without dead ends: 193 [2022-10-17 10:46:57,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:46:57,087 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 10 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:46:57,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 216 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:46:57,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-10-17 10:46:57,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 178. [2022-10-17 10:46:57,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 163 states have (on average 1.4417177914110428) internal successors, (235), 165 states have internal predecessors, (235), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2022-10-17 10:46:57,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 270 transitions. [2022-10-17 10:46:57,106 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 270 transitions. Word has length 57 [2022-10-17 10:46:57,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:46:57,106 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 270 transitions. [2022-10-17 10:46:57,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:46:57,107 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 270 transitions. [2022-10-17 10:46:57,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-10-17 10:46:57,108 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:46:57,108 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:46:57,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:46:57,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:46:57,337 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:46:57,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:46:57,338 INFO L85 PathProgramCache]: Analyzing trace with hash -119632198, now seen corresponding path program 1 times [2022-10-17 10:46:57,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:46:57,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821962063] [2022-10-17 10:46:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:46:57,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:46:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:57,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:46:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:57,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:46:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:57,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-10-17 10:46:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:57,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-10-17 10:46:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-10-17 10:46:57,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:46:57,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821962063] [2022-10-17 10:46:57,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821962063] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:46:57,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882135111] [2022-10-17 10:46:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:46:57,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:46:57,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:46:57,469 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:46:57,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:46:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:57,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:46:57,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:46:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:46:57,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:46:57,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882135111] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:46:57,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:46:57,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-10-17 10:46:57,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541112660] [2022-10-17 10:46:57,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:46:57,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:46:57,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:46:57,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:46:57,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:46:57,575 INFO L87 Difference]: Start difference. First operand 178 states and 270 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:46:57,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:46:57,653 INFO L93 Difference]: Finished difference Result 371 states and 568 transitions. [2022-10-17 10:46:57,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:46:57,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2022-10-17 10:46:57,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:46:57,657 INFO L225 Difference]: With dead ends: 371 [2022-10-17 10:46:57,657 INFO L226 Difference]: Without dead ends: 202 [2022-10-17 10:46:57,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:46:57,660 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 28 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:46:57,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 308 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:46:57,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-10-17 10:46:57,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2022-10-17 10:46:57,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 182 states have (on average 1.445054945054945) internal successors, (263), 186 states have internal predecessors, (263), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2022-10-17 10:46:57,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 303 transitions. [2022-10-17 10:46:57,681 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 303 transitions. Word has length 58 [2022-10-17 10:46:57,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:46:57,681 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 303 transitions. [2022-10-17 10:46:57,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:46:57,681 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 303 transitions. [2022-10-17 10:46:57,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-10-17 10:46:57,683 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:46:57,683 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:46:57,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:46:57,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-10-17 10:46:57,898 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:46:57,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:46:57,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1669233391, now seen corresponding path program 1 times [2022-10-17 10:46:57,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:46:57,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745652658] [2022-10-17 10:46:57,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:46:57,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:46:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:57,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:46:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:58,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-10-17 10:46:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:58,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-10-17 10:46:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:58,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-10-17 10:46:58,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-17 10:46:58,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:46:58,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745652658] [2022-10-17 10:46:58,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745652658] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:46:58,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526095474] [2022-10-17 10:46:58,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:46:58,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:46:58,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:46:58,059 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:46:58,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 10:46:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:58,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:46:58,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:46:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-17 10:46:58,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:46:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-17 10:46:58,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526095474] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:46:58,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:46:58,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-10-17 10:46:58,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90118204] [2022-10-17 10:46:58,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:46:58,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 10:46:58,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:46:58,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 10:46:58,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:46:58,284 INFO L87 Difference]: Start difference. First operand 199 states and 303 transitions. Second operand has 12 states, 12 states have (on average 6.75) internal successors, (81), 11 states have internal predecessors, (81), 2 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 10:46:58,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:46:58,681 INFO L93 Difference]: Finished difference Result 507 states and 815 transitions. [2022-10-17 10:46:58,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-17 10:46:58,682 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 11 states have internal predecessors, (81), 2 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 61 [2022-10-17 10:46:58,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:46:58,686 INFO L225 Difference]: With dead ends: 507 [2022-10-17 10:46:58,686 INFO L226 Difference]: Without dead ends: 341 [2022-10-17 10:46:58,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2022-10-17 10:46:58,688 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 564 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:46:58,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 546 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:46:58,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-10-17 10:46:58,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 208. [2022-10-17 10:46:58,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 191 states have (on average 1.455497382198953) internal successors, (278), 195 states have internal predecessors, (278), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2022-10-17 10:46:58,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 318 transitions. [2022-10-17 10:46:58,720 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 318 transitions. Word has length 61 [2022-10-17 10:46:58,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:46:58,720 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 318 transitions. [2022-10-17 10:46:58,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 11 states have internal predecessors, (81), 2 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 10:46:58,720 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 318 transitions. [2022-10-17 10:46:58,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-10-17 10:46:58,722 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:46:58,722 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:46:58,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 10:46:58,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-17 10:46:58,945 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:46:58,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:46:58,945 INFO L85 PathProgramCache]: Analyzing trace with hash -466980042, now seen corresponding path program 1 times [2022-10-17 10:46:58,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:46:58,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365808066] [2022-10-17 10:46:58,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:46:58,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:46:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:59,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:46:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:59,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-17 10:46:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:59,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-10-17 10:46:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:59,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-10-17 10:46:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-17 10:46:59,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:46:59,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365808066] [2022-10-17 10:46:59,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365808066] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:46:59,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116307761] [2022-10-17 10:46:59,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:46:59,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:46:59,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:46:59,074 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:46:59,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 10:46:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:46:59,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:46:59,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:46:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:46:59,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:46:59,270 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-10-17 10:46:59,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116307761] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:46:59,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:46:59,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-10-17 10:46:59,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965425410] [2022-10-17 10:46:59,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:46:59,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 10:46:59,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:46:59,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 10:46:59,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:46:59,274 INFO L87 Difference]: Start difference. First operand 208 states and 318 transitions. Second operand has 12 states, 12 states have (on average 6.75) internal successors, (81), 11 states have internal predecessors, (81), 2 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 10:46:59,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:46:59,687 INFO L93 Difference]: Finished difference Result 636 states and 1037 transitions. [2022-10-17 10:46:59,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-17 10:46:59,688 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 11 states have internal predecessors, (81), 2 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 62 [2022-10-17 10:46:59,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:46:59,692 INFO L225 Difference]: With dead ends: 636 [2022-10-17 10:46:59,692 INFO L226 Difference]: Without dead ends: 433 [2022-10-17 10:46:59,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2022-10-17 10:46:59,695 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 450 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:46:59,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 543 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:46:59,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-10-17 10:46:59,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 241. [2022-10-17 10:46:59,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 224 states have (on average 1.4776785714285714) internal successors, (331), 228 states have internal predecessors, (331), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2022-10-17 10:46:59,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 371 transitions. [2022-10-17 10:46:59,727 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 371 transitions. Word has length 62 [2022-10-17 10:46:59,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:46:59,728 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 371 transitions. [2022-10-17 10:46:59,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 11 states have internal predecessors, (81), 2 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 10:46:59,728 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 371 transitions. [2022-10-17 10:46:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-10-17 10:46:59,730 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:46:59,730 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:46:59,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-10-17 10:46:59,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:46:59,945 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:46:59,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:46:59,945 INFO L85 PathProgramCache]: Analyzing trace with hash -893343291, now seen corresponding path program 1 times [2022-10-17 10:46:59,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:46:59,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795451418] [2022-10-17 10:46:59,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:46:59,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:46:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:00,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:47:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:00,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-10-17 10:47:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:00,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-10-17 10:47:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:00,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-10-17 10:47:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-10-17 10:47:00,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:00,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795451418] [2022-10-17 10:47:00,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795451418] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:00,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214293998] [2022-10-17 10:47:00,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:00,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:00,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:00,253 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:00,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-17 10:47:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:00,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 10:47:00,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:47:00,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:47:00,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214293998] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:47:00,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:47:00,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-10-17 10:47:00,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909308124] [2022-10-17 10:47:00,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:47:00,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:47:00,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:00,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:47:00,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:47:00,382 INFO L87 Difference]: Start difference. First operand 241 states and 371 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:47:00,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:00,601 INFO L93 Difference]: Finished difference Result 512 states and 810 transitions. [2022-10-17 10:47:00,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:47:00,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-10-17 10:47:00,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:00,605 INFO L225 Difference]: With dead ends: 512 [2022-10-17 10:47:00,605 INFO L226 Difference]: Without dead ends: 288 [2022-10-17 10:47:00,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:47:00,607 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 49 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:00,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 404 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:47:00,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-10-17 10:47:00,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 253. [2022-10-17 10:47:00,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 236 states have (on average 1.4745762711864407) internal successors, (348), 240 states have internal predecessors, (348), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2022-10-17 10:47:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 388 transitions. [2022-10-17 10:47:00,639 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 388 transitions. Word has length 67 [2022-10-17 10:47:00,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:00,640 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 388 transitions. [2022-10-17 10:47:00,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:47:00,640 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 388 transitions. [2022-10-17 10:47:00,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-10-17 10:47:00,643 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:00,643 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:00,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-17 10:47:00,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-10-17 10:47:00,857 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:47:00,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:00,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1890690419, now seen corresponding path program 1 times [2022-10-17 10:47:00,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:00,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153313297] [2022-10-17 10:47:00,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:00,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:00,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:47:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:01,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-10-17 10:47:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:01,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-10-17 10:47:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:01,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-10-17 10:47:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-10-17 10:47:01,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:01,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153313297] [2022-10-17 10:47:01,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153313297] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:01,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863833925] [2022-10-17 10:47:01,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:01,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:01,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:01,143 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:01,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-17 10:47:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:01,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 10:47:01,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-10-17 10:47:01,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:47:01,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863833925] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:47:01,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:47:01,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-10-17 10:47:01,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890791798] [2022-10-17 10:47:01,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:47:01,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:47:01,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:01,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:47:01,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:47:01,311 INFO L87 Difference]: Start difference. First operand 253 states and 388 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:47:01,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:01,455 INFO L93 Difference]: Finished difference Result 486 states and 761 transitions. [2022-10-17 10:47:01,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:47:01,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 70 [2022-10-17 10:47:01,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:01,458 INFO L225 Difference]: With dead ends: 486 [2022-10-17 10:47:01,458 INFO L226 Difference]: Without dead ends: 280 [2022-10-17 10:47:01,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:47:01,460 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 44 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:01,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 307 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:47:01,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-10-17 10:47:01,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 249. [2022-10-17 10:47:01,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 232 states have (on average 1.4698275862068966) internal successors, (341), 236 states have internal predecessors, (341), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2022-10-17 10:47:01,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 381 transitions. [2022-10-17 10:47:01,486 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 381 transitions. Word has length 70 [2022-10-17 10:47:01,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:01,487 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 381 transitions. [2022-10-17 10:47:01,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:47:01,487 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 381 transitions. [2022-10-17 10:47:01,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-10-17 10:47:01,489 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:01,489 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:01,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-17 10:47:01,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-17 10:47:01,716 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:47:01,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:01,716 INFO L85 PathProgramCache]: Analyzing trace with hash -355472767, now seen corresponding path program 1 times [2022-10-17 10:47:01,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:01,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875249147] [2022-10-17 10:47:01,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:01,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:01,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:47:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:01,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:47:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:01,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-10-17 10:47:01,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:01,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-10-17 10:47:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-10-17 10:47:01,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:01,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875249147] [2022-10-17 10:47:01,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875249147] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:47:01,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:47:01,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:47:01,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477860489] [2022-10-17 10:47:01,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:47:01,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:47:01,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:01,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:47:01,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:47:01,822 INFO L87 Difference]: Start difference. First operand 249 states and 381 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:47:01,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:01,915 INFO L93 Difference]: Finished difference Result 384 states and 586 transitions. [2022-10-17 10:47:01,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:47:01,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 73 [2022-10-17 10:47:01,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:01,918 INFO L225 Difference]: With dead ends: 384 [2022-10-17 10:47:01,918 INFO L226 Difference]: Without dead ends: 305 [2022-10-17 10:47:01,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:47:01,919 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 50 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:01,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 302 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:47:01,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-10-17 10:47:01,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 251. [2022-10-17 10:47:01,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 234 states have (on average 1.4572649572649572) internal successors, (341), 238 states have internal predecessors, (341), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2022-10-17 10:47:01,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 381 transitions. [2022-10-17 10:47:01,945 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 381 transitions. Word has length 73 [2022-10-17 10:47:01,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:01,945 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 381 transitions. [2022-10-17 10:47:01,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:47:01,946 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 381 transitions. [2022-10-17 10:47:01,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-10-17 10:47:01,948 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:01,948 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:01,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-10-17 10:47:01,948 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:47:01,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:01,949 INFO L85 PathProgramCache]: Analyzing trace with hash -488263672, now seen corresponding path program 1 times [2022-10-17 10:47:01,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:01,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730919854] [2022-10-17 10:47:01,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:01,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:02,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:47:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:02,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-10-17 10:47:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:02,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-10-17 10:47:02,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:02,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-10-17 10:47:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-10-17 10:47:02,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:02,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730919854] [2022-10-17 10:47:02,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730919854] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:02,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146414266] [2022-10-17 10:47:02,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:02,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:02,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:02,169 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:02,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-17 10:47:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:02,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 10:47:02,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-10-17 10:47:02,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:47:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-10-17 10:47:02,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146414266] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:47:02,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:47:02,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-10-17 10:47:02,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532668602] [2022-10-17 10:47:02,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:47:02,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:47:02,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:02,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:47:02,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:47:02,699 INFO L87 Difference]: Start difference. First operand 251 states and 381 transitions. Second operand has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 13 states have internal predecessors, (108), 2 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 10:47:03,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:03,542 INFO L93 Difference]: Finished difference Result 501 states and 764 transitions. [2022-10-17 10:47:03,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-17 10:47:03,543 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 13 states have internal predecessors, (108), 2 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2022-10-17 10:47:03,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:03,545 INFO L225 Difference]: With dead ends: 501 [2022-10-17 10:47:03,546 INFO L226 Difference]: Without dead ends: 244 [2022-10-17 10:47:03,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2022-10-17 10:47:03,549 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 419 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:03,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 841 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 10:47:03,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-10-17 10:47:03,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 135. [2022-10-17 10:47:03,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 126 states have (on average 1.4682539682539681) internal successors, (185), 126 states have internal predecessors, (185), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-10-17 10:47:03,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 198 transitions. [2022-10-17 10:47:03,570 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 198 transitions. Word has length 73 [2022-10-17 10:47:03,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:03,570 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 198 transitions. [2022-10-17 10:47:03,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 13 states have internal predecessors, (108), 2 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-17 10:47:03,570 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 198 transitions. [2022-10-17 10:47:03,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-10-17 10:47:03,571 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:03,572 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:03,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-17 10:47:03,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:03,785 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:47:03,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:03,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1607504626, now seen corresponding path program 1 times [2022-10-17 10:47:03,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:03,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473830817] [2022-10-17 10:47:03,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:03,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:03,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:47:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:03,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:47:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:03,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-10-17 10:47:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:03,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-10-17 10:47:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:47:03,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:03,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473830817] [2022-10-17 10:47:03,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473830817] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:47:03,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:47:03,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 10:47:03,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417063349] [2022-10-17 10:47:03,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:47:03,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 10:47:03,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:03,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 10:47:03,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:47:03,970 INFO L87 Difference]: Start difference. First operand 135 states and 198 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 7 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:47:04,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:04,095 INFO L93 Difference]: Finished difference Result 243 states and 353 transitions. [2022-10-17 10:47:04,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:47:04,095 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 7 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 76 [2022-10-17 10:47:04,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:04,098 INFO L225 Difference]: With dead ends: 243 [2022-10-17 10:47:04,098 INFO L226 Difference]: Without dead ends: 189 [2022-10-17 10:47:04,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:47:04,100 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 82 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:04,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 813 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:47:04,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-10-17 10:47:04,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 141. [2022-10-17 10:47:04,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 130 states have (on average 1.4538461538461538) internal successors, (189), 132 states have internal predecessors, (189), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-10-17 10:47:04,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 204 transitions. [2022-10-17 10:47:04,117 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 204 transitions. Word has length 76 [2022-10-17 10:47:04,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:04,117 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 204 transitions. [2022-10-17 10:47:04,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 7 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:47:04,118 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 204 transitions. [2022-10-17 10:47:04,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-10-17 10:47:04,119 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:04,119 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:04,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-10-17 10:47:04,120 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:47:04,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:04,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1656623811, now seen corresponding path program 1 times [2022-10-17 10:47:04,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:04,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724558125] [2022-10-17 10:47:04,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:04,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:04,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:47:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:04,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:47:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:04,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-10-17 10:47:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:04,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-10-17 10:47:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:04,200 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-10-17 10:47:04,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:04,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724558125] [2022-10-17 10:47:04,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724558125] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:47:04,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:47:04,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:47:04,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731569082] [2022-10-17 10:47:04,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:47:04,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:47:04,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:04,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:47:04,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:47:04,202 INFO L87 Difference]: Start difference. First operand 141 states and 204 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:47:04,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:04,242 INFO L93 Difference]: Finished difference Result 193 states and 282 transitions. [2022-10-17 10:47:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:47:04,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 80 [2022-10-17 10:47:04,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:04,244 INFO L225 Difference]: With dead ends: 193 [2022-10-17 10:47:04,244 INFO L226 Difference]: Without dead ends: 160 [2022-10-17 10:47:04,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:47:04,245 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 35 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:04,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 305 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:47:04,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-10-17 10:47:04,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 141. [2022-10-17 10:47:04,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 130 states have (on average 1.4461538461538461) internal successors, (188), 132 states have internal predecessors, (188), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-10-17 10:47:04,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 203 transitions. [2022-10-17 10:47:04,263 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 203 transitions. Word has length 80 [2022-10-17 10:47:04,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:04,263 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 203 transitions. [2022-10-17 10:47:04,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:47:04,264 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 203 transitions. [2022-10-17 10:47:04,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-10-17 10:47:04,265 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:04,265 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:04,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-10-17 10:47:04,265 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:47:04,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:04,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1819933303, now seen corresponding path program 1 times [2022-10-17 10:47:04,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:04,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091620255] [2022-10-17 10:47:04,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:04,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:04,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:47:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:04,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:47:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:04,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-10-17 10:47:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:04,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-10-17 10:47:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:04,450 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-10-17 10:47:04,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:04,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091620255] [2022-10-17 10:47:04,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091620255] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:04,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857252008] [2022-10-17 10:47:04,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:04,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:04,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:04,453 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:04,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-17 10:47:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:04,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 10:47:04,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:04,635 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-10-17 10:47:04,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:47:04,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857252008] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:47:04,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:47:04,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-10-17 10:47:04,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516287552] [2022-10-17 10:47:04,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:47:04,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:47:04,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:04,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:47:04,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:47:04,638 INFO L87 Difference]: Start difference. First operand 141 states and 203 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:47:04,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:04,766 INFO L93 Difference]: Finished difference Result 278 states and 388 transitions. [2022-10-17 10:47:04,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:47:04,767 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 83 [2022-10-17 10:47:04,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:04,769 INFO L225 Difference]: With dead ends: 278 [2022-10-17 10:47:04,769 INFO L226 Difference]: Without dead ends: 236 [2022-10-17 10:47:04,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:47:04,770 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 225 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:04,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 949 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:47:04,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-10-17 10:47:04,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 169. [2022-10-17 10:47:04,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 157 states have (on average 1.3885350318471337) internal successors, (218), 159 states have internal predecessors, (218), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-10-17 10:47:04,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 235 transitions. [2022-10-17 10:47:04,791 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 235 transitions. Word has length 83 [2022-10-17 10:47:04,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:04,792 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 235 transitions. [2022-10-17 10:47:04,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:47:04,792 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 235 transitions. [2022-10-17 10:47:04,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-10-17 10:47:04,794 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:04,794 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:04,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-17 10:47:05,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-10-17 10:47:05,021 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:47:05,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:05,021 INFO L85 PathProgramCache]: Analyzing trace with hash 551805959, now seen corresponding path program 1 times [2022-10-17 10:47:05,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:05,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344661193] [2022-10-17 10:47:05,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:05,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:05,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:47:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:05,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:47:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:05,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-10-17 10:47:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:05,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-10-17 10:47:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-10-17 10:47:05,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:05,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344661193] [2022-10-17 10:47:05,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344661193] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:05,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59815060] [2022-10-17 10:47:05,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:05,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:05,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:05,208 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:05,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-17 10:47:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:05,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-17 10:47:05,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-10-17 10:47:05,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:47:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-10-17 10:47:05,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59815060] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:47:05,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:47:05,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-10-17 10:47:05,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867024837] [2022-10-17 10:47:05,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:47:05,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-17 10:47:05,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:05,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-17 10:47:05,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-10-17 10:47:05,539 INFO L87 Difference]: Start difference. First operand 169 states and 235 transitions. Second operand has 16 states, 16 states have (on average 5.5625) internal successors, (89), 13 states have internal predecessors, (89), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-17 10:47:05,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:05,762 INFO L93 Difference]: Finished difference Result 375 states and 521 transitions. [2022-10-17 10:47:05,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 10:47:05,762 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 13 states have internal predecessors, (89), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 83 [2022-10-17 10:47:05,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:05,766 INFO L225 Difference]: With dead ends: 375 [2022-10-17 10:47:05,766 INFO L226 Difference]: Without dead ends: 290 [2022-10-17 10:47:05,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 161 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-10-17 10:47:05,767 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 180 mSDsluCounter, 2256 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 2500 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:05,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 2500 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:47:05,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-10-17 10:47:05,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 166. [2022-10-17 10:47:05,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 155 states have (on average 1.367741935483871) internal successors, (212), 156 states have internal predecessors, (212), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-10-17 10:47:05,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 226 transitions. [2022-10-17 10:47:05,786 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 226 transitions. Word has length 83 [2022-10-17 10:47:05,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:05,787 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 226 transitions. [2022-10-17 10:47:05,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 13 states have internal predecessors, (89), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-17 10:47:05,787 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 226 transitions. [2022-10-17 10:47:05,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-10-17 10:47:05,789 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:05,789 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:05,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-10-17 10:47:06,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:06,006 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:47:06,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:06,006 INFO L85 PathProgramCache]: Analyzing trace with hash -66223114, now seen corresponding path program 2 times [2022-10-17 10:47:06,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:06,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034187065] [2022-10-17 10:47:06,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:06,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:06,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:47:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:06,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:47:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:06,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-10-17 10:47:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:06,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-10-17 10:47:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-10-17 10:47:06,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:06,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034187065] [2022-10-17 10:47:06,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034187065] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:06,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710529025] [2022-10-17 10:47:06,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:47:06,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:06,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:06,249 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:06,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-10-17 10:47:06,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-17 10:47:06,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:47:06,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 10:47:06,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:06,423 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-10-17 10:47:06,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:47:06,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710529025] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:47:06,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:47:06,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2022-10-17 10:47:06,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113400857] [2022-10-17 10:47:06,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:47:06,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 10:47:06,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:06,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 10:47:06,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:47:06,425 INFO L87 Difference]: Start difference. First operand 166 states and 226 transitions. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:47:06,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:06,678 INFO L93 Difference]: Finished difference Result 320 states and 435 transitions. [2022-10-17 10:47:06,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 10:47:06,679 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 87 [2022-10-17 10:47:06,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:06,681 INFO L225 Difference]: With dead ends: 320 [2022-10-17 10:47:06,681 INFO L226 Difference]: Without dead ends: 279 [2022-10-17 10:47:06,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-10-17 10:47:06,682 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 295 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:06,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 1075 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:47:06,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-10-17 10:47:06,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 176. [2022-10-17 10:47:06,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 165 states have (on average 1.3454545454545455) internal successors, (222), 166 states have internal predecessors, (222), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-10-17 10:47:06,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 236 transitions. [2022-10-17 10:47:06,723 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 236 transitions. Word has length 87 [2022-10-17 10:47:06,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:06,723 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 236 transitions. [2022-10-17 10:47:06,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:47:06,724 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 236 transitions. [2022-10-17 10:47:06,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-10-17 10:47:06,725 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:06,725 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:06,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-10-17 10:47:06,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:06,933 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:47:06,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:06,934 INFO L85 PathProgramCache]: Analyzing trace with hash 152631604, now seen corresponding path program 1 times [2022-10-17 10:47:06,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:06,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327725689] [2022-10-17 10:47:06,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:06,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:07,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:47:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:07,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:47:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:07,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-10-17 10:47:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:07,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-10-17 10:47:07,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-10-17 10:47:07,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:07,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327725689] [2022-10-17 10:47:07,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327725689] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:07,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819439931] [2022-10-17 10:47:07,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:07,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:07,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:07,168 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:07,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-10-17 10:47:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:07,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 10:47:07,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 10:47:07,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:47:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-10-17 10:47:07,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819439931] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:47:07,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:47:07,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-10-17 10:47:07,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825578887] [2022-10-17 10:47:07,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:47:07,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:47:07,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:07,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:47:07,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:47:07,430 INFO L87 Difference]: Start difference. First operand 176 states and 236 transitions. Second operand has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 13 states have internal predecessors, (102), 2 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 10:47:08,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:08,226 INFO L93 Difference]: Finished difference Result 486 states and 688 transitions. [2022-10-17 10:47:08,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-10-17 10:47:08,227 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 13 states have internal predecessors, (102), 2 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2022-10-17 10:47:08,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:08,230 INFO L225 Difference]: With dead ends: 486 [2022-10-17 10:47:08,230 INFO L226 Difference]: Without dead ends: 319 [2022-10-17 10:47:08,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=301, Invalid=755, Unknown=0, NotChecked=0, Total=1056 [2022-10-17 10:47:08,233 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 366 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:08,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 594 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:47:08,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-10-17 10:47:08,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 172. [2022-10-17 10:47:08,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 161 states have (on average 1.329192546583851) internal successors, (214), 162 states have internal predecessors, (214), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-10-17 10:47:08,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 228 transitions. [2022-10-17 10:47:08,258 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 228 transitions. Word has length 87 [2022-10-17 10:47:08,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:08,258 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 228 transitions. [2022-10-17 10:47:08,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 13 states have internal predecessors, (102), 2 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 10:47:08,259 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 228 transitions. [2022-10-17 10:47:08,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-10-17 10:47:08,260 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:08,261 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:08,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-10-17 10:47:08,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-10-17 10:47:08,489 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:47:08,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:08,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1886336854, now seen corresponding path program 1 times [2022-10-17 10:47:08,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:08,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723147842] [2022-10-17 10:47:08,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:08,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:08,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:47:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:08,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:47:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:08,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-10-17 10:47:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:08,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-10-17 10:47:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-10-17 10:47:08,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:08,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723147842] [2022-10-17 10:47:08,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723147842] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:08,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784703435] [2022-10-17 10:47:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:08,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:08,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:08,703 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:08,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-10-17 10:47:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:08,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 10:47:08,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 10:47:08,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:47:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-10-17 10:47:09,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784703435] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:47:09,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:47:09,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2022-10-17 10:47:09,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966670213] [2022-10-17 10:47:09,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:47:09,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-10-17 10:47:09,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:09,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-10-17 10:47:09,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-10-17 10:47:09,080 INFO L87 Difference]: Start difference. First operand 172 states and 228 transitions. Second operand has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 20 states have internal predecessors, (116), 2 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-17 10:47:09,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:09,906 INFO L93 Difference]: Finished difference Result 636 states and 914 transitions. [2022-10-17 10:47:09,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-10-17 10:47:09,907 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 20 states have internal predecessors, (116), 2 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 89 [2022-10-17 10:47:09,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:09,911 INFO L225 Difference]: With dead ends: 636 [2022-10-17 10:47:09,911 INFO L226 Difference]: Without dead ends: 467 [2022-10-17 10:47:09,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=629, Invalid=1263, Unknown=0, NotChecked=0, Total=1892 [2022-10-17 10:47:09,914 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 1195 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1195 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:09,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1195 Valid, 954 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:47:09,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-10-17 10:47:09,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 194. [2022-10-17 10:47:09,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 183 states have (on average 1.3442622950819672) internal successors, (246), 184 states have internal predecessors, (246), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-10-17 10:47:09,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 260 transitions. [2022-10-17 10:47:09,948 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 260 transitions. Word has length 89 [2022-10-17 10:47:09,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:09,948 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 260 transitions. [2022-10-17 10:47:09,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 20 states have internal predecessors, (116), 2 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-17 10:47:09,949 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 260 transitions. [2022-10-17 10:47:09,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-10-17 10:47:09,950 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:09,951 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:09,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-10-17 10:47:10,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:10,173 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:47:10,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:10,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1033497780, now seen corresponding path program 2 times [2022-10-17 10:47:10,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:10,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190683877] [2022-10-17 10:47:10,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:10,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:10,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:47:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:10,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:47:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:10,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-10-17 10:47:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:10,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-10-17 10:47:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-10-17 10:47:10,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:10,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190683877] [2022-10-17 10:47:10,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190683877] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:10,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051807725] [2022-10-17 10:47:10,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:47:10,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:10,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:10,546 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:10,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-10-17 10:47:10,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-17 10:47:10,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:47:10,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 10:47:10,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:10,756 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-10-17 10:47:10,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:47:10,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051807725] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:47:10,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:47:10,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2022-10-17 10:47:10,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997308228] [2022-10-17 10:47:10,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:47:10,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:47:10,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:10,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:47:10,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-10-17 10:47:10,760 INFO L87 Difference]: Start difference. First operand 194 states and 260 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:47:10,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:10,861 INFO L93 Difference]: Finished difference Result 236 states and 315 transitions. [2022-10-17 10:47:10,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:47:10,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 99 [2022-10-17 10:47:10,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:10,863 INFO L225 Difference]: With dead ends: 236 [2022-10-17 10:47:10,863 INFO L226 Difference]: Without dead ends: 164 [2022-10-17 10:47:10,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:47:10,865 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 93 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:10,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 652 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:47:10,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-10-17 10:47:10,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-10-17 10:47:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 153 states have (on average 1.392156862745098) internal successors, (213), 155 states have internal predecessors, (213), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-10-17 10:47:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 226 transitions. [2022-10-17 10:47:10,889 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 226 transitions. Word has length 99 [2022-10-17 10:47:10,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:10,889 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 226 transitions. [2022-10-17 10:47:10,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:47:10,890 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 226 transitions. [2022-10-17 10:47:10,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-10-17 10:47:10,891 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:10,891 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:10,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-10-17 10:47:11,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:11,107 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:47:11,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:11,108 INFO L85 PathProgramCache]: Analyzing trace with hash -439667758, now seen corresponding path program 1 times [2022-10-17 10:47:11,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:11,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115223179] [2022-10-17 10:47:11,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:11,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:11,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:47:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:11,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:47:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:11,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-10-17 10:47:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:11,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-10-17 10:47:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-10-17 10:47:11,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:11,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115223179] [2022-10-17 10:47:11,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115223179] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:47:11,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:47:11,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-10-17 10:47:11,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135845815] [2022-10-17 10:47:11,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:47:11,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:47:11,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:11,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:47:11,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:47:11,388 INFO L87 Difference]: Start difference. First operand 164 states and 226 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 8 states have internal predecessors, (66), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:47:11,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:11,670 INFO L93 Difference]: Finished difference Result 462 states and 644 transitions. [2022-10-17 10:47:11,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-10-17 10:47:11,671 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 8 states have internal predecessors, (66), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 102 [2022-10-17 10:47:11,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:11,674 INFO L225 Difference]: With dead ends: 462 [2022-10-17 10:47:11,674 INFO L226 Difference]: Without dead ends: 420 [2022-10-17 10:47:11,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-10-17 10:47:11,676 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 519 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:11,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 1036 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:47:11,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-10-17 10:47:11,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 202. [2022-10-17 10:47:11,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 189 states have (on average 1.3333333333333333) internal successors, (252), 192 states have internal predecessors, (252), 5 states have call successors, (5), 4 states have call predecessors, (5), 7 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-10-17 10:47:11,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 270 transitions. [2022-10-17 10:47:11,709 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 270 transitions. Word has length 102 [2022-10-17 10:47:11,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:11,710 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 270 transitions. [2022-10-17 10:47:11,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 8 states have internal predecessors, (66), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:47:11,710 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 270 transitions. [2022-10-17 10:47:11,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-10-17 10:47:11,712 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:11,712 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:11,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-10-17 10:47:11,712 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:47:11,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:11,713 INFO L85 PathProgramCache]: Analyzing trace with hash -2144041074, now seen corresponding path program 1 times [2022-10-17 10:47:11,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:11,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452919460] [2022-10-17 10:47:11,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:11,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:11,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:47:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:11,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:47:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:12,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-10-17 10:47:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:12,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-10-17 10:47:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:12,102 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-17 10:47:12,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:12,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452919460] [2022-10-17 10:47:12,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452919460] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:12,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858930805] [2022-10-17 10:47:12,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:12,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:12,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:12,104 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:12,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-10-17 10:47:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:12,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 10:47:12,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-10-17 10:47:12,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:47:12,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858930805] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:47:12,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:47:12,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 19 [2022-10-17 10:47:12,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340019877] [2022-10-17 10:47:12,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:47:12,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:47:12,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:12,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:47:12,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-10-17 10:47:12,346 INFO L87 Difference]: Start difference. First operand 202 states and 270 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:47:12,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:12,560 INFO L93 Difference]: Finished difference Result 439 states and 592 transitions. [2022-10-17 10:47:12,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-17 10:47:12,560 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 102 [2022-10-17 10:47:12,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:12,563 INFO L225 Difference]: With dead ends: 439 [2022-10-17 10:47:12,563 INFO L226 Difference]: Without dead ends: 392 [2022-10-17 10:47:12,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-10-17 10:47:12,565 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 367 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:12,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 1124 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:47:12,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-10-17 10:47:12,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 216. [2022-10-17 10:47:12,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 201 states have (on average 1.3134328358208955) internal successors, (264), 205 states have internal predecessors, (264), 5 states have call successors, (5), 4 states have call predecessors, (5), 9 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2022-10-17 10:47:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 287 transitions. [2022-10-17 10:47:12,601 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 287 transitions. Word has length 102 [2022-10-17 10:47:12,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:12,601 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 287 transitions. [2022-10-17 10:47:12,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:47:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 287 transitions. [2022-10-17 10:47:12,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-10-17 10:47:12,603 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:12,604 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:12,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-10-17 10:47:12,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-10-17 10:47:12,820 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:47:12,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:12,821 INFO L85 PathProgramCache]: Analyzing trace with hash -164908144, now seen corresponding path program 1 times [2022-10-17 10:47:12,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:12,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023784245] [2022-10-17 10:47:12,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:12,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:12,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:47:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:12,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:47:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:13,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-10-17 10:47:13,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:13,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-10-17 10:47:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-10-17 10:47:13,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:13,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023784245] [2022-10-17 10:47:13,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023784245] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:47:13,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:47:13,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-10-17 10:47:13,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822149216] [2022-10-17 10:47:13,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:47:13,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:47:13,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:13,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:47:13,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:47:13,046 INFO L87 Difference]: Start difference. First operand 216 states and 287 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 8 states have internal predecessors, (66), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:47:13,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:13,248 INFO L93 Difference]: Finished difference Result 332 states and 450 transitions. [2022-10-17 10:47:13,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-17 10:47:13,249 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 8 states have internal predecessors, (66), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 102 [2022-10-17 10:47:13,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:13,251 INFO L225 Difference]: With dead ends: 332 [2022-10-17 10:47:13,251 INFO L226 Difference]: Without dead ends: 274 [2022-10-17 10:47:13,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-10-17 10:47:13,253 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 161 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:13,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 1092 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:47:13,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-10-17 10:47:13,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 207. [2022-10-17 10:47:13,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 193 states have (on average 1.3264248704663213) internal successors, (256), 197 states have internal predecessors, (256), 5 states have call successors, (5), 4 states have call predecessors, (5), 8 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-10-17 10:47:13,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 276 transitions. [2022-10-17 10:47:13,284 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 276 transitions. Word has length 102 [2022-10-17 10:47:13,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:13,285 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 276 transitions. [2022-10-17 10:47:13,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 8 states have internal predecessors, (66), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:47:13,285 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 276 transitions. [2022-10-17 10:47:13,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-10-17 10:47:13,287 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:13,287 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:13,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-10-17 10:47:13,287 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:47:13,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:13,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1424103864, now seen corresponding path program 1 times [2022-10-17 10:47:13,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:13,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931339570] [2022-10-17 10:47:13,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:13,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:13,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:47:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:13,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:47:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:13,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-10-17 10:47:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:13,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-10-17 10:47:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:13,458 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-10-17 10:47:13,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:13,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931339570] [2022-10-17 10:47:13,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931339570] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:47:13,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:47:13,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 10:47:13,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059761452] [2022-10-17 10:47:13,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:47:13,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 10:47:13,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:13,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 10:47:13,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:47:13,460 INFO L87 Difference]: Start difference. First operand 207 states and 276 transitions. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 7 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:47:13,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:13,649 INFO L93 Difference]: Finished difference Result 467 states and 637 transitions. [2022-10-17 10:47:13,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:47:13,650 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 7 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 103 [2022-10-17 10:47:13,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:13,652 INFO L225 Difference]: With dead ends: 467 [2022-10-17 10:47:13,652 INFO L226 Difference]: Without dead ends: 269 [2022-10-17 10:47:13,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-10-17 10:47:13,654 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 61 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:13,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 866 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:47:13,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-10-17 10:47:13,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 211. [2022-10-17 10:47:13,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 197 states have (on average 1.3350253807106598) internal successors, (263), 201 states have internal predecessors, (263), 5 states have call successors, (5), 4 states have call predecessors, (5), 8 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-10-17 10:47:13,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 283 transitions. [2022-10-17 10:47:13,686 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 283 transitions. Word has length 103 [2022-10-17 10:47:13,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:13,687 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 283 transitions. [2022-10-17 10:47:13,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 7 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:47:13,687 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 283 transitions. [2022-10-17 10:47:13,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-10-17 10:47:13,693 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:13,694 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:13,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-10-17 10:47:13,694 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:47:13,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:13,694 INFO L85 PathProgramCache]: Analyzing trace with hash 39479401, now seen corresponding path program 1 times [2022-10-17 10:47:13,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:13,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613699771] [2022-10-17 10:47:13,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:13,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:13,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:47:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:13,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:47:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:14,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-10-17 10:47:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:14,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-10-17 10:47:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 4 proven. 61 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-17 10:47:14,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:14,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613699771] [2022-10-17 10:47:14,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613699771] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:14,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756613646] [2022-10-17 10:47:14,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:14,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:14,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:14,039 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:14,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-10-17 10:47:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:14,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 27 conjunts are in the unsatisfiable core [2022-10-17 10:47:14,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-10-17 10:47:14,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:47:14,590 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-10-17 10:47:14,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756613646] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:47:14,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:47:14,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 24 [2022-10-17 10:47:14,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014082289] [2022-10-17 10:47:14,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:47:14,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-17 10:47:14,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:14,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-17 10:47:14,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-10-17 10:47:14,593 INFO L87 Difference]: Start difference. First operand 211 states and 283 transitions. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 20 states have internal predecessors, (114), 4 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 7 states have call predecessors, (12), 4 states have call successors, (12) [2022-10-17 10:47:16,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:16,410 INFO L93 Difference]: Finished difference Result 476 states and 661 transitions. [2022-10-17 10:47:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-10-17 10:47:16,411 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 20 states have internal predecessors, (114), 4 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 7 states have call predecessors, (12), 4 states have call successors, (12) Word has length 104 [2022-10-17 10:47:16,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:16,411 INFO L225 Difference]: With dead ends: 476 [2022-10-17 10:47:16,411 INFO L226 Difference]: Without dead ends: 0 [2022-10-17 10:47:16,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 209 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=769, Invalid=3521, Unknown=0, NotChecked=0, Total=4290 [2022-10-17 10:47:16,415 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 679 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:16,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 333 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 10:47:16,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-10-17 10:47:16,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-10-17 10:47:16,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:47:16,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-10-17 10:47:16,416 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 104 [2022-10-17 10:47:16,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:16,417 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-10-17 10:47:16,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 20 states have internal predecessors, (114), 4 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 7 states have call predecessors, (12), 4 states have call successors, (12) [2022-10-17 10:47:16,417 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-10-17 10:47:16,417 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-10-17 10:47:16,420 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-10-17 10:47:16,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-10-17 10:47:16,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc06daef-9637-4617-8544-9d5e69647758/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:16,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.