./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/duplets.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/duplets.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN --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 ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 --- 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-6b4ec56 [2022-11-20 11:03:59,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:03:59,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:03:59,502 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:03:59,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:03:59,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:03:59,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:03:59,516 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:03:59,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:03:59,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:03:59,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:03:59,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:03:59,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:03:59,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:03:59,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:03:59,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:03:59,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:03:59,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:03:59,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:03:59,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:03:59,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:03:59,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:03:59,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:03:59,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:03:59,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:03:59,568 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:03:59,568 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:03:59,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:03:59,570 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:03:59,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:03:59,572 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:03:59,573 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:03:59,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:03:59,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:03:59,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:03:59,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:03:59,582 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:03:59,583 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:03:59,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:03:59,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:03:59,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:03:59,587 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:03:59,628 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:03:59,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:03:59,639 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:03:59,639 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:03:59,640 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:03:59,641 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:03:59,642 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:03:59,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:03:59,643 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:03:59,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:03:59,644 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:03:59,645 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:03:59,645 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:03:59,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:03:59,646 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:03:59,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:03:59,646 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:03:59,646 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:03:59,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:03:59,647 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:03:59,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:03:59,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:03:59,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:03:59,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:03:59,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:03:59,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:03:59,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:03:59,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:03:59,649 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:03:59,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:03:59,650 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:03:59,650 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:03:59,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:03:59,651 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_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 [2022-11-20 11:03:59,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:04:00,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:04:00,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:04:00,007 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:04:00,007 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:04:00,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/verifythis/duplets.c [2022-11-20 11:04:03,429 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:04:03,749 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:04:03,750 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/sv-benchmarks/c/verifythis/duplets.c [2022-11-20 11:04:03,758 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/data/80fe66e69/d952ca8d89fa4248b118c3ba236cfbeb/FLAG082575b01 [2022-11-20 11:04:03,778 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/data/80fe66e69/d952ca8d89fa4248b118c3ba236cfbeb [2022-11-20 11:04:03,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:04:03,783 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:04:03,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:04:03,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:04:03,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:04:03,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:04:03" (1/1) ... [2022-11-20 11:04:03,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f741d48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:03, skipping insertion in model container [2022-11-20 11:04:03,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:04:03" (1/1) ... [2022-11-20 11:04:03,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:04:03,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:04:03,987 WARN L237 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_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/sv-benchmarks/c/verifythis/duplets.c[485,498] [2022-11-20 11:04:04,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:04:04,047 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:04:04,058 WARN L237 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_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/sv-benchmarks/c/verifythis/duplets.c[485,498] [2022-11-20 11:04:04,071 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:04:04,084 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:04:04,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:04 WrapperNode [2022-11-20 11:04:04,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:04:04,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:04:04,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:04:04,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:04:04,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:04" (1/1) ... [2022-11-20 11:04:04,116 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:04" (1/1) ... [2022-11-20 11:04:04,149 INFO L138 Inliner]: procedures = 21, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 120 [2022-11-20 11:04:04,149 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:04:04,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:04:04,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:04:04,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:04:04,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:04" (1/1) ... [2022-11-20 11:04:04,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:04" (1/1) ... [2022-11-20 11:04:04,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:04" (1/1) ... [2022-11-20 11:04:04,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:04" (1/1) ... [2022-11-20 11:04:04,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:04" (1/1) ... [2022-11-20 11:04:04,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:04" (1/1) ... [2022-11-20 11:04:04,212 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:04" (1/1) ... [2022-11-20 11:04:04,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:04" (1/1) ... [2022-11-20 11:04:04,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:04:04,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:04:04,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:04:04,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:04:04,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:04" (1/1) ... [2022-11-20 11:04:04,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:04:04,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:04,263 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:04:04,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:04:04,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:04:04,327 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 11:04:04,328 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 11:04:04,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:04:04,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:04:04,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:04:04,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:04:04,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:04:04,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:04:04,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:04:04,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 11:04:04,330 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 11:04:04,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:04:04,442 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:04:04,444 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:04:04,674 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:04:04,687 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:04:04,700 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 11:04:04,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:04:04 BoogieIcfgContainer [2022-11-20 11:04:04,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:04:04,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:04:04,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:04:04,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:04:04,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:04:03" (1/3) ... [2022-11-20 11:04:04,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d8f3716 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:04:04, skipping insertion in model container [2022-11-20 11:04:04,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:04" (2/3) ... [2022-11-20 11:04:04,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d8f3716 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:04:04, skipping insertion in model container [2022-11-20 11:04:04,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:04:04" (3/3) ... [2022-11-20 11:04:04,728 INFO L112 eAbstractionObserver]: Analyzing ICFG duplets.c [2022-11-20 11:04:04,757 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:04:04,760 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:04:04,832 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:04:04,841 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;@61a08306, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:04:04,841 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:04:04,846 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 30 states have internal predecessors, (39), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 11:04:04,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 11:04:04,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:04,856 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:04:04,857 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:04:04,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:04,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1761765480, now seen corresponding path program 1 times [2022-11-20 11:04:04,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:04,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677725848] [2022-11-20 11:04:04,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:04,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:05,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:04:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:05,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:04:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:05,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:04:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:05,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:04:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 11:04:05,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:05,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677725848] [2022-11-20 11:04:05,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677725848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:04:05,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:04:05,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:04:05,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959400562] [2022-11-20 11:04:05,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:04:05,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:04:05,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:05,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:04:05,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:04:05,177 INFO L87 Difference]: Start difference. First operand has 42 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 30 states have internal predecessors, (39), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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) [2022-11-20 11:04:05,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:04:05,219 INFO L93 Difference]: Finished difference Result 81 states and 119 transitions. [2022-11-20 11:04:05,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:04:05,222 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 33 [2022-11-20 11:04:05,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:04:05,261 INFO L225 Difference]: With dead ends: 81 [2022-11-20 11:04:05,261 INFO L226 Difference]: Without dead ends: 38 [2022-11-20 11:04:05,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:04:05,280 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:04:05,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:04:05,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-20 11:04:05,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-20 11:04:05,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 11:04:05,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2022-11-20 11:04:05,369 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 33 [2022-11-20 11:04:05,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:04:05,370 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2022-11-20 11:04:05,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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) [2022-11-20 11:04:05,373 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2022-11-20 11:04:05,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 11:04:05,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:05,377 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:04:05,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:04:05,378 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:04:05,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:05,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1486889832, now seen corresponding path program 1 times [2022-11-20 11:04:05,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:05,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895951419] [2022-11-20 11:04:05,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:05,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:06,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:04:06,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:06,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:04:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:06,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:04:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:06,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:04:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:04:06,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:06,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895951419] [2022-11-20 11:04:06,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895951419] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:06,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664659432] [2022-11-20 11:04:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:06,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:06,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:06,174 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:06,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:04:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:06,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 11:04:06,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:04:06,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:04:06,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664659432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:06,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:04:06,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-11-20 11:04:06,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566287203] [2022-11-20 11:04:06,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:06,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:04:06,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:06,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:04:06,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:04:06,838 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 13 states, 9 states have (on average 2.888888888888889) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-20 11:04:07,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:04:07,229 INFO L93 Difference]: Finished difference Result 86 states and 117 transitions. [2022-11-20 11:04:07,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:04:07,230 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 2.888888888888889) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 33 [2022-11-20 11:04:07,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:04:07,232 INFO L225 Difference]: With dead ends: 86 [2022-11-20 11:04:07,232 INFO L226 Difference]: Without dead ends: 67 [2022-11-20 11:04:07,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:04:07,234 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 169 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:04:07,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 244 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:04:07,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-20 11:04:07,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 39. [2022-11-20 11:04:07,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 11:04:07,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2022-11-20 11:04:07,250 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 33 [2022-11-20 11:04:07,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:04:07,251 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2022-11-20 11:04:07,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 2.888888888888889) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-20 11:04:07,251 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2022-11-20 11:04:07,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 11:04:07,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:07,253 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:04:07,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:07,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-20 11:04:07,461 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:04:07,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:07,461 INFO L85 PathProgramCache]: Analyzing trace with hash -534242288, now seen corresponding path program 1 times [2022-11-20 11:04:07,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:07,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585437595] [2022-11-20 11:04:07,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:07,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:07,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:04:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:07,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:04:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:07,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:04:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:07,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:04:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 11:04:07,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:07,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585437595] [2022-11-20 11:04:07,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585437595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:04:07,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:04:07,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:04:07,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145835454] [2022-11-20 11:04:07,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:04:07,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:04:07,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:07,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:04:07,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:04:07,611 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-11-20 11:04:07,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:04:07,703 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-11-20 11:04:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:04:07,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 34 [2022-11-20 11:04:07,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:04:07,706 INFO L225 Difference]: With dead ends: 57 [2022-11-20 11:04:07,706 INFO L226 Difference]: Without dead ends: 55 [2022-11-20 11:04:07,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:04:07,708 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 22 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:04:07,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 234 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:04:07,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-20 11:04:07,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2022-11-20 11:04:07,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 11:04:07,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-11-20 11:04:07,732 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 34 [2022-11-20 11:04:07,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:04:07,733 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-11-20 11:04:07,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-11-20 11:04:07,734 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-11-20 11:04:07,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 11:04:07,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:07,739 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:04:07,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:04:07,740 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:04:07,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:07,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1697931955, now seen corresponding path program 1 times [2022-11-20 11:04:07,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:07,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660033871] [2022-11-20 11:04:07,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:07,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:08,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:04:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:08,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:04:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:08,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:04:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:08,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:04:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:08,358 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:04:08,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:08,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660033871] [2022-11-20 11:04:08,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660033871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:04:08,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:04:08,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 11:04:08,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308417517] [2022-11-20 11:04:08,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:04:08,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:04:08,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:08,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:04:08,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:04:08,368 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 11 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 11:04:09,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:04:09,029 INFO L93 Difference]: Finished difference Result 92 states and 120 transitions. [2022-11-20 11:04:09,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:04:09,030 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-11-20 11:04:09,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:04:09,033 INFO L225 Difference]: With dead ends: 92 [2022-11-20 11:04:09,033 INFO L226 Difference]: Without dead ends: 62 [2022-11-20 11:04:09,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:04:09,035 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 178 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:04:09,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 215 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:04:09,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-20 11:04:09,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2022-11-20 11:04:09,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.1875) internal successors, (38), 34 states have internal predecessors, (38), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 11:04:09,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2022-11-20 11:04:09,055 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 36 [2022-11-20 11:04:09,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:04:09,055 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2022-11-20 11:04:09,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 11:04:09,056 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2022-11-20 11:04:09,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 11:04:09,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:09,057 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:04:09,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:04:09,058 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:04:09,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:09,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1519460479, now seen corresponding path program 1 times [2022-11-20 11:04:09,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:09,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342753752] [2022-11-20 11:04:09,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:09,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:09,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:04:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:09,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:04:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:09,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:04:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:09,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:04:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 11:04:09,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:09,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342753752] [2022-11-20 11:04:09,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342753752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:09,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56863970] [2022-11-20 11:04:09,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:09,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:09,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:09,175 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:09,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:04:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:09,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:04:09,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 11:04:09,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 11:04:09,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56863970] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:09,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:04:09,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-11-20 11:04:09,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724136682] [2022-11-20 11:04:09,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:09,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:04:09,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:09,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:04:09,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:04:09,399 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 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) [2022-11-20 11:04:09,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:04:09,506 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2022-11-20 11:04:09,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:04:09,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 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 39 [2022-11-20 11:04:09,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:04:09,513 INFO L225 Difference]: With dead ends: 78 [2022-11-20 11:04:09,513 INFO L226 Difference]: Without dead ends: 59 [2022-11-20 11:04:09,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:04:09,517 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 39 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:04:09,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 128 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:04:09,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-20 11:04:09,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2022-11-20 11:04:09,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 11:04:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-11-20 11:04:09,548 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 39 [2022-11-20 11:04:09,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:04:09,548 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-11-20 11:04:09,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 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) [2022-11-20 11:04:09,549 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-11-20 11:04:09,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 11:04:09,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:09,550 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-20 11:04:09,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:09,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:09,757 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:04:09,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:09,758 INFO L85 PathProgramCache]: Analyzing trace with hash 764415265, now seen corresponding path program 1 times [2022-11-20 11:04:09,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:09,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98333987] [2022-11-20 11:04:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:09,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:10,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:04:10,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:10,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:04:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:10,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:04:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:10,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:04:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:10,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-20 11:04:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:10,587 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 11:04:10,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:10,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98333987] [2022-11-20 11:04:10,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98333987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:10,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323596162] [2022-11-20 11:04:10,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:10,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:10,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:10,591 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:10,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:04:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:10,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-20 11:04:10,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:10,993 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:04:10,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2022-11-20 11:04:11,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-20 11:04:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 11:04:11,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:11,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 150 [2022-11-20 11:04:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 11:04:11,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323596162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:11,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:04:11,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 28 [2022-11-20 11:04:11,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252568611] [2022-11-20 11:04:11,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:11,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 11:04:11,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:11,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 11:04:11,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2022-11-20 11:04:11,977 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 28 states, 24 states have (on average 1.625) internal successors, (39), 26 states have internal predecessors, (39), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-20 11:04:13,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:04:13,937 INFO L93 Difference]: Finished difference Result 118 states and 156 transitions. [2022-11-20 11:04:13,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:04:13,939 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 1.625) internal successors, (39), 26 states have internal predecessors, (39), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 41 [2022-11-20 11:04:13,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:04:13,941 INFO L225 Difference]: With dead ends: 118 [2022-11-20 11:04:13,941 INFO L226 Difference]: Without dead ends: 104 [2022-11-20 11:04:13,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=314, Invalid=1666, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 11:04:13,943 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 194 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:04:13,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 383 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 11:04:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-20 11:04:13,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 75. [2022-11-20 11:04:13,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 59 states have internal predecessors, (69), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-20 11:04:13,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2022-11-20 11:04:13,997 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 41 [2022-11-20 11:04:13,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:04:13,998 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2022-11-20 11:04:13,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 1.625) internal successors, (39), 26 states have internal predecessors, (39), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-20 11:04:13,998 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2022-11-20 11:04:14,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 11:04:14,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:14,005 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-20 11:04:14,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:14,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:14,211 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:04:14,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:14,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1347467836, now seen corresponding path program 2 times [2022-11-20 11:04:14,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:14,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247246711] [2022-11-20 11:04:14,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:14,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:15,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:04:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:15,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:04:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:15,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:04:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:15,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:04:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 11:04:15,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:15,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247246711] [2022-11-20 11:04:15,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247246711] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:15,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965606925] [2022-11-20 11:04:15,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:04:15,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:15,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:15,584 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:15,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:04:15,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:04:15,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:04:15,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-20 11:04:15,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:16,029 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-20 11:04:16,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-11-20 11:04:19,793 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-20 11:04:19,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 62 [2022-11-20 11:04:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 11:04:20,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:21,343 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:04:21,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 503 treesize of output 435 [2022-11-20 11:04:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 11:04:23,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965606925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:23,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:04:23,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2022-11-20 11:04:23,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163473588] [2022-11-20 11:04:23,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:23,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 11:04:23,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:23,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 11:04:23,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1139, Unknown=3, NotChecked=0, Total=1260 [2022-11-20 11:04:23,971 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 36 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:04:26,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:04:26,059 INFO L93 Difference]: Finished difference Result 138 states and 178 transitions. [2022-11-20 11:04:26,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:04:26,060 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 42 [2022-11-20 11:04:26,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:04:26,061 INFO L225 Difference]: With dead ends: 138 [2022-11-20 11:04:26,061 INFO L226 Difference]: Without dead ends: 90 [2022-11-20 11:04:26,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=239, Invalid=1920, Unknown=3, NotChecked=0, Total=2162 [2022-11-20 11:04:26,063 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 32 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:04:26,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 656 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 296 Invalid, 0 Unknown, 65 Unchecked, 0.3s Time] [2022-11-20 11:04:26,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-20 11:04:26,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2022-11-20 11:04:26,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 62 states have internal predecessors, (73), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-20 11:04:26,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 98 transitions. [2022-11-20 11:04:26,088 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 98 transitions. Word has length 42 [2022-11-20 11:04:26,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:04:26,088 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 98 transitions. [2022-11-20 11:04:26,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 11:04:26,089 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 98 transitions. [2022-11-20 11:04:26,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 11:04:26,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:26,090 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-20 11:04:26,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:26,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:26,296 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:04:26,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:26,296 INFO L85 PathProgramCache]: Analyzing trace with hash 236785912, now seen corresponding path program 3 times [2022-11-20 11:04:26,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:26,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884989332] [2022-11-20 11:04:26,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:26,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:26,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:04:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:26,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:04:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:26,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:04:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:26,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:04:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 11:04:26,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:26,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884989332] [2022-11-20 11:04:26,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884989332] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:26,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47893549] [2022-11-20 11:04:26,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:04:26,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:26,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:26,392 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:26,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:04:26,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 11:04:26,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:04:26,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:04:26,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 11:04:26,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 11:04:26,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47893549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:26,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:04:26,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-11-20 11:04:26,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180836112] [2022-11-20 11:04:26,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:26,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:04:26,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:26,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:04:26,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:04:26,589 INFO L87 Difference]: Start difference. First operand 78 states and 98 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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) [2022-11-20 11:04:26,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:04:26,851 INFO L93 Difference]: Finished difference Result 159 states and 210 transitions. [2022-11-20 11:04:26,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:04:26,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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 45 [2022-11-20 11:04:26,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:04:26,860 INFO L225 Difference]: With dead ends: 159 [2022-11-20 11:04:26,860 INFO L226 Difference]: Without dead ends: 119 [2022-11-20 11:04:26,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:04:26,865 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 76 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:04:26,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 222 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:04:26,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-20 11:04:26,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 87. [2022-11-20 11:04:26,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 68 states have (on average 1.25) internal successors, (85), 71 states have internal predecessors, (85), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-20 11:04:26,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2022-11-20 11:04:26,919 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 45 [2022-11-20 11:04:26,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:04:26,920 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2022-11-20 11:04:26,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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) [2022-11-20 11:04:26,920 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2022-11-20 11:04:26,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 11:04:26,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:26,926 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] [2022-11-20 11:04:26,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:27,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:27,132 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:04:27,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:27,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1486891216, now seen corresponding path program 1 times [2022-11-20 11:04:27,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:27,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022929557] [2022-11-20 11:04:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:27,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:27,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:27,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:04:27,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:27,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:04:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:27,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:04:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:27,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:04:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:27,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-20 11:04:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:27,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 11:04:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 11:04:27,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:27,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022929557] [2022-11-20 11:04:27,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022929557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:04:27,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:04:27,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:04:27,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475382321] [2022-11-20 11:04:27,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:04:27,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:04:27,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:27,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:04:27,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:04:27,472 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 11:04:27,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:04:27,689 INFO L93 Difference]: Finished difference Result 106 states and 135 transitions. [2022-11-20 11:04:27,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:04:27,690 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2022-11-20 11:04:27,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:04:27,692 INFO L225 Difference]: With dead ends: 106 [2022-11-20 11:04:27,692 INFO L226 Difference]: Without dead ends: 104 [2022-11-20 11:04:27,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:04:27,695 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 49 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:04:27,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 224 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:04:27,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-20 11:04:27,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2022-11-20 11:04:27,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 79 states have internal predecessors, (94), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-20 11:04:27,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 125 transitions. [2022-11-20 11:04:27,726 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 125 transitions. Word has length 48 [2022-11-20 11:04:27,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:04:27,727 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 125 transitions. [2022-11-20 11:04:27,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 11:04:27,727 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 125 transitions. [2022-11-20 11:04:27,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 11:04:27,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:27,728 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] [2022-11-20 11:04:27,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:04:27,729 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:04:27,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:27,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1485044174, now seen corresponding path program 1 times [2022-11-20 11:04:27,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:27,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911735553] [2022-11-20 11:04:27,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:27,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:27,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:04:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:27,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:04:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:27,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:04:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:27,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:04:27,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:27,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-20 11:04:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:27,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 11:04:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 11:04:27,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:27,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911735553] [2022-11-20 11:04:27,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911735553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:04:27,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:04:27,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:04:27,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470067104] [2022-11-20 11:04:27,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:04:27,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:04:27,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:27,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:04:27,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:04:27,957 INFO L87 Difference]: Start difference. First operand 98 states and 125 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 11:04:28,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:04:28,106 INFO L93 Difference]: Finished difference Result 117 states and 149 transitions. [2022-11-20 11:04:28,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:04:28,107 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2022-11-20 11:04:28,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:04:28,108 INFO L225 Difference]: With dead ends: 117 [2022-11-20 11:04:28,108 INFO L226 Difference]: Without dead ends: 106 [2022-11-20 11:04:28,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:04:28,109 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 27 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:04:28,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 144 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:04:28,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-20 11:04:28,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2022-11-20 11:04:28,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 77 states have (on average 1.2467532467532467) internal successors, (96), 81 states have internal predecessors, (96), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-20 11:04:28,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 129 transitions. [2022-11-20 11:04:28,141 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 129 transitions. Word has length 48 [2022-11-20 11:04:28,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:04:28,142 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 129 transitions. [2022-11-20 11:04:28,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 11:04:28,142 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 129 transitions. [2022-11-20 11:04:28,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 11:04:28,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:28,143 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] [2022-11-20 11:04:28,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 11:04:28,144 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:04:28,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:28,144 INFO L85 PathProgramCache]: Analyzing trace with hash -2045289640, now seen corresponding path program 1 times [2022-11-20 11:04:28,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:28,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228851333] [2022-11-20 11:04:28,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:28,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:28,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:04:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:28,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:04:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:28,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:04:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:28,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:04:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:28,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:04:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 11:04:28,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:28,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228851333] [2022-11-20 11:04:28,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228851333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:28,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541518584] [2022-11-20 11:04:28,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:28,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:28,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:28,511 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:28,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:04:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:28,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:04:28,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:28,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 11:04:28,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-20 11:04:28,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:04:28,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 11:04:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 11:04:28,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:28,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:04:28,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-20 11:04:28,949 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:04:28,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-11-20 11:04:28,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 11:04:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 11:04:29,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541518584] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:29,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:04:29,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 7] total 17 [2022-11-20 11:04:29,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742163954] [2022-11-20 11:04:29,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:04:29,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:04:29,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:29,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:04:29,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:04:29,139 INFO L87 Difference]: Start difference. First operand 101 states and 129 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 11:04:29,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:04:29,294 INFO L93 Difference]: Finished difference Result 125 states and 158 transitions. [2022-11-20 11:04:29,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:04:29,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2022-11-20 11:04:29,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:04:29,296 INFO L225 Difference]: With dead ends: 125 [2022-11-20 11:04:29,296 INFO L226 Difference]: Without dead ends: 106 [2022-11-20 11:04:29,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:04:29,298 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 50 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:04:29,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 130 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:04:29,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-20 11:04:29,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2022-11-20 11:04:29,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 81 states have internal predecessors, (94), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-20 11:04:29,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 127 transitions. [2022-11-20 11:04:29,331 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 127 transitions. Word has length 50 [2022-11-20 11:04:29,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:04:29,331 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 127 transitions. [2022-11-20 11:04:29,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 11:04:29,332 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 127 transitions. [2022-11-20 11:04:29,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 11:04:29,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:29,332 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:04:29,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:29,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:29,539 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:04:29,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:29,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1688735023, now seen corresponding path program 4 times [2022-11-20 11:04:29,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:29,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076165568] [2022-11-20 11:04:29,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:29,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:34,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:04:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:34,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:04:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:34,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:04:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:34,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:04:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 11:04:34,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:34,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076165568] [2022-11-20 11:04:34,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076165568] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:34,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453519857] [2022-11-20 11:04:34,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:04:34,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:34,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:34,259 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:34,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:04:34,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:04:34,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:04:34,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-20 11:04:34,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:34,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-20 11:04:35,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-20 11:04:36,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 73 [2022-11-20 11:04:37,166 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:04:37,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:38,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453519857] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:38,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:04:38,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 37 [2022-11-20 11:04:38,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647363553] [2022-11-20 11:04:38,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:38,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 11:04:38,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:38,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 11:04:38,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2266, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 11:04:38,984 INFO L87 Difference]: Start difference. First operand 101 states and 127 transitions. Second operand has 37 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-20 11:04:40,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:04:40,125 INFO L93 Difference]: Finished difference Result 176 states and 222 transitions. [2022-11-20 11:04:40,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:04:40,126 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 51 [2022-11-20 11:04:40,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:04:40,127 INFO L225 Difference]: With dead ends: 176 [2022-11-20 11:04:40,127 INFO L226 Difference]: Without dead ends: 112 [2022-11-20 11:04:40,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=372, Invalid=2820, Unknown=0, NotChecked=0, Total=3192 [2022-11-20 11:04:40,130 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:04:40,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 487 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 165 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-11-20 11:04:40,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-20 11:04:40,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-11-20 11:04:40,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 87 states have (on average 1.2183908045977012) internal successors, (106), 91 states have internal predecessors, (106), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-20 11:04:40,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 139 transitions. [2022-11-20 11:04:40,184 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 139 transitions. Word has length 51 [2022-11-20 11:04:40,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:04:40,184 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 139 transitions. [2022-11-20 11:04:40,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-20 11:04:40,185 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 139 transitions. [2022-11-20 11:04:40,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-20 11:04:40,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:40,186 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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] [2022-11-20 11:04:40,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:40,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:40,391 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:04:40,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:40,391 INFO L85 PathProgramCache]: Analyzing trace with hash 80194579, now seen corresponding path program 1 times [2022-11-20 11:04:40,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:40,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738552121] [2022-11-20 11:04:40,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:40,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:40,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:04:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:40,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:04:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:40,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:04:40,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:40,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:04:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:40,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-20 11:04:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:40,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 11:04:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:40,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 11:04:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 11:04:40,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:40,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738552121] [2022-11-20 11:04:40,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738552121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:40,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268655325] [2022-11-20 11:04:40,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:40,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:40,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:40,937 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:40,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:04:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:41,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-20 11:04:41,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:41,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 11:04:41,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:04:41,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-20 11:04:41,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-11-20 11:04:41,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 11:04:41,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 11:04:41,715 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:04:41,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 11:04:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 11:04:41,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:42,005 INFO L321 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2022-11-20 11:04:42,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 94 treesize of output 87 [2022-11-20 11:04:42,019 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:04:42,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 59 [2022-11-20 11:04:42,070 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:04:42,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 183 treesize of output 211 [2022-11-20 11:04:42,107 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:04:42,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 153 treesize of output 167 [2022-11-20 11:04:43,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-20 11:04:43,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-20 11:04:43,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-11-20 11:04:43,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-20 11:04:43,823 INFO L321 Elim1Store]: treesize reduction 20, result has 64.9 percent of original size [2022-11-20 11:04:43,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 408 treesize of output 417 [2022-11-20 11:04:44,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-11-20 11:04:44,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:04:44,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-20 11:04:44,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 11:04:44,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:04:44,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2022-11-20 11:04:44,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:04:44,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-20 11:04:44,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:04:44,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 189 treesize of output 187 [2022-11-20 11:04:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 11:04:45,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268655325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:45,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:04:45,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 27 [2022-11-20 11:04:45,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293591221] [2022-11-20 11:04:45,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:45,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 11:04:45,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:45,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 11:04:45,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-11-20 11:04:45,558 INFO L87 Difference]: Start difference. First operand 112 states and 139 transitions. Second operand has 27 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 26 states have internal predecessors, (52), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-20 11:04:47,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:04:47,076 INFO L93 Difference]: Finished difference Result 182 states and 227 transitions. [2022-11-20 11:04:47,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 11:04:47,083 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 26 states have internal predecessors, (52), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) Word has length 54 [2022-11-20 11:04:47,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:04:47,085 INFO L225 Difference]: With dead ends: 182 [2022-11-20 11:04:47,086 INFO L226 Difference]: Without dead ends: 180 [2022-11-20 11:04:47,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=314, Invalid=1666, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 11:04:47,090 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 196 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:04:47,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 369 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 606 Invalid, 0 Unknown, 128 Unchecked, 0.6s Time] [2022-11-20 11:04:47,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-20 11:04:47,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 157. [2022-11-20 11:04:47,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 117 states have (on average 1.170940170940171) internal successors, (137), 124 states have internal predecessors, (137), 29 states have call successors, (29), 11 states have call predecessors, (29), 10 states have return successors, (28), 21 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-20 11:04:47,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 194 transitions. [2022-11-20 11:04:47,151 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 194 transitions. Word has length 54 [2022-11-20 11:04:47,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:04:47,152 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 194 transitions. [2022-11-20 11:04:47,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 26 states have internal predecessors, (52), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-20 11:04:47,153 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 194 transitions. [2022-11-20 11:04:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-20 11:04:47,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:47,154 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:04:47,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:47,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 11:04:47,360 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:04:47,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:47,361 INFO L85 PathProgramCache]: Analyzing trace with hash -864445317, now seen corresponding path program 5 times [2022-11-20 11:04:47,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:47,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048421550] [2022-11-20 11:04:47,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:47,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:47,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:04:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:47,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:04:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:47,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:04:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:47,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:04:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 11:04:47,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:47,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048421550] [2022-11-20 11:04:47,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048421550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:47,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534589842] [2022-11-20 11:04:47,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:04:47,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:47,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:47,524 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:47,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:04:47,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 11:04:47,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:04:47,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:04:47,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:47,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:04:47,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-20 11:04:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 11:04:47,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 11:04:48,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534589842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:48,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:04:48,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 20 [2022-11-20 11:04:48,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113319094] [2022-11-20 11:04:48,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:48,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 11:04:48,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:48,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 11:04:48,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:04:48,014 INFO L87 Difference]: Start difference. First operand 157 states and 194 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 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) [2022-11-20 11:04:48,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:04:48,977 INFO L93 Difference]: Finished difference Result 282 states and 364 transitions. [2022-11-20 11:04:48,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:04:48,978 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 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 54 [2022-11-20 11:04:48,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:04:48,980 INFO L225 Difference]: With dead ends: 282 [2022-11-20 11:04:48,980 INFO L226 Difference]: Without dead ends: 215 [2022-11-20 11:04:48,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=319, Invalid=1087, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 11:04:48,981 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 224 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:04:48,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 869 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:04:48,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-11-20 11:04:49,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 169. [2022-11-20 11:04:49,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 129 states have (on average 1.186046511627907) internal successors, (153), 136 states have internal predecessors, (153), 29 states have call successors, (29), 11 states have call predecessors, (29), 10 states have return successors, (28), 21 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-20 11:04:49,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 210 transitions. [2022-11-20 11:04:49,048 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 210 transitions. Word has length 54 [2022-11-20 11:04:49,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:04:49,048 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 210 transitions. [2022-11-20 11:04:49,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 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) [2022-11-20 11:04:49,049 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 210 transitions. [2022-11-20 11:04:49,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-20 11:04:49,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:49,050 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2022-11-20 11:04:49,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:49,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 11:04:49,255 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:04:49,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:49,255 INFO L85 PathProgramCache]: Analyzing trace with hash -692170403, now seen corresponding path program 1 times [2022-11-20 11:04:49,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:49,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631469316] [2022-11-20 11:04:49,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:49,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:49,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:04:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:49,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:04:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:49,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:04:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:49,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:04:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:49,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:04:49,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:49,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-20 11:04:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 11:04:49,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:49,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631469316] [2022-11-20 11:04:49,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631469316] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:49,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438156] [2022-11-20 11:04:49,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:49,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:49,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:49,541 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:49,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:04:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:49,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:04:49,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:49,859 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-20 11:04:49,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-20 11:04:49,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 11:04:49,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-20 11:04:49,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 15 [2022-11-20 11:04:49,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-20 11:04:49,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 11:04:50,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 11:04:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 11:04:50,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:50,141 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:04:50,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 112 [2022-11-20 11:04:50,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 124 [2022-11-20 11:04:50,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2022-11-20 11:04:50,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 11:04:50,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 65 [2022-11-20 11:04:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 11:04:50,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438156] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:50,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:04:50,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2022-11-20 11:04:50,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348391602] [2022-11-20 11:04:50,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:50,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:04:50,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:50,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:04:50,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:04:50,439 INFO L87 Difference]: Start difference. First operand 169 states and 210 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-20 11:04:50,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:04:50,942 INFO L93 Difference]: Finished difference Result 206 states and 252 transitions. [2022-11-20 11:04:50,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:04:50,943 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 57 [2022-11-20 11:04:50,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:04:50,945 INFO L225 Difference]: With dead ends: 206 [2022-11-20 11:04:50,945 INFO L226 Difference]: Without dead ends: 190 [2022-11-20 11:04:50,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:04:50,946 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 100 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:04:50,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 393 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 241 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-11-20 11:04:50,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-11-20 11:04:51,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 172. [2022-11-20 11:04:51,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 131 states have (on average 1.1755725190839694) internal successors, (154), 139 states have internal predecessors, (154), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (27), 19 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-20 11:04:51,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 209 transitions. [2022-11-20 11:04:51,045 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 209 transitions. Word has length 57 [2022-11-20 11:04:51,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:04:51,046 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 209 transitions. [2022-11-20 11:04:51,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-20 11:04:51,047 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 209 transitions. [2022-11-20 11:04:51,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 11:04:51,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:51,048 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 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, 1, 1, 1, 1, 1] [2022-11-20 11:04:51,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:51,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 11:04:51,250 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:04:51,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:51,251 INFO L85 PathProgramCache]: Analyzing trace with hash 229495732, now seen corresponding path program 1 times [2022-11-20 11:04:51,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:51,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136800797] [2022-11-20 11:04:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:51,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:52,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:04:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:52,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:04:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:52,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:04:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:52,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:04:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:52,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-20 11:04:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:52,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 11:04:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:52,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 11:04:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:52,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-20 11:04:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:52,379 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-20 11:04:52,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:52,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136800797] [2022-11-20 11:04:52,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136800797] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:52,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438208805] [2022-11-20 11:04:52,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:52,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:52,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:52,383 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:52,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:04:52,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:52,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-20 11:04:52,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:52,603 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-20 11:04:52,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 31 [2022-11-20 11:04:52,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 11:04:52,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:04:52,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:04:53,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:04:53,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 37 [2022-11-20 11:04:53,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 11:04:53,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:04:53,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:04:53,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:04:53,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2022-11-20 11:04:54,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:04:54,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:04:54,181 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-20 11:04:54,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 36 [2022-11-20 11:04:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-20 11:04:54,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:54,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:04:54,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 11:04:55,224 INFO L321 Elim1Store]: treesize reduction 397, result has 40.8 percent of original size [2022-11-20 11:04:55,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 770 treesize of output 822 [2022-11-20 11:04:55,395 INFO L321 Elim1Store]: treesize reduction 87, result has 29.3 percent of original size [2022-11-20 11:04:55,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 765 treesize of output 756 [2022-11-20 11:04:55,508 INFO L321 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2022-11-20 11:04:55,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 326 treesize of output 338 [2022-11-20 11:04:57,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 73 [2022-11-20 11:04:58,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:04:58,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 11:04:58,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:04:58,707 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:04:58,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 57 [2022-11-20 11:04:58,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-20 11:04:58,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 66 [2022-11-20 11:04:59,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:04:59,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-20 11:04:59,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2022-11-20 11:04:59,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2022-11-20 11:04:59,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:04:59,124 INFO L321 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2022-11-20 11:04:59,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 20 [2022-11-20 11:04:59,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:04:59,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 24 [2022-11-20 11:04:59,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:04:59,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:04:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-20 11:04:59,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438208805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:59,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:04:59,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 38 [2022-11-20 11:04:59,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043397502] [2022-11-20 11:04:59,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:59,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 11:04:59,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:59,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 11:04:59,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 11:04:59,319 INFO L87 Difference]: Start difference. First operand 172 states and 209 transitions. Second operand has 38 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 36 states have internal predecessors, (62), 10 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 7 states have call predecessors, (19), 9 states have call successors, (19) [2022-11-20 11:05:01,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:01,636 INFO L93 Difference]: Finished difference Result 200 states and 242 transitions. [2022-11-20 11:05:01,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 11:05:01,636 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 36 states have internal predecessors, (62), 10 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 7 states have call predecessors, (19), 9 states have call successors, (19) Word has length 60 [2022-11-20 11:05:01,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:01,638 INFO L225 Difference]: With dead ends: 200 [2022-11-20 11:05:01,638 INFO L226 Difference]: Without dead ends: 152 [2022-11-20 11:05:01,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 112 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=445, Invalid=2525, Unknown=0, NotChecked=0, Total=2970 [2022-11-20 11:05:01,640 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 227 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 422 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:01,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 423 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 630 Invalid, 0 Unknown, 422 Unchecked, 0.7s Time] [2022-11-20 11:05:01,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-20 11:05:01,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-11-20 11:05:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 117 states have (on average 1.1794871794871795) internal successors, (138), 123 states have internal predecessors, (138), 25 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (22), 18 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-20 11:05:01,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 185 transitions. [2022-11-20 11:05:01,707 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 185 transitions. Word has length 60 [2022-11-20 11:05:01,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:01,708 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 185 transitions. [2022-11-20 11:05:01,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 36 states have internal predecessors, (62), 10 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 7 states have call predecessors, (19), 9 states have call successors, (19) [2022-11-20 11:05:01,708 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 185 transitions. [2022-11-20 11:05:01,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 11:05:01,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:01,709 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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] [2022-11-20 11:05:01,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-20 11:05:01,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 11:05:01,914 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:05:01,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:01,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1459498899, now seen corresponding path program 1 times [2022-11-20 11:05:01,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:01,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808582026] [2022-11-20 11:05:01,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:01,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:02,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:05:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:02,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:05:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:02,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:05:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:02,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:05:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:02,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 11:05:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:02,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 11:05:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:02,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-20 11:05:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 11:05:02,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:02,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808582026] [2022-11-20 11:05:02,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808582026] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:02,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850287072] [2022-11-20 11:05:02,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:02,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:02,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:02,531 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:02,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:05:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:02,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-20 11:05:02,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:02,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 11:05:03,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-20 11:05:03,548 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:05:03,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 11:05:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 11:05:03,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:03,779 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:05:03,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 706 treesize of output 654 [2022-11-20 11:05:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 11:05:04,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850287072] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:04,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:05:04,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 33 [2022-11-20 11:05:04,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413108598] [2022-11-20 11:05:04,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:04,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 11:05:04,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:04,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 11:05:04,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 11:05:04,994 INFO L87 Difference]: Start difference. First operand 152 states and 185 transitions. Second operand has 33 states, 28 states have (on average 2.5) internal successors, (70), 32 states have internal predecessors, (70), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-20 11:05:08,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:08,509 INFO L93 Difference]: Finished difference Result 220 states and 268 transitions. [2022-11-20 11:05:08,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 11:05:08,510 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 28 states have (on average 2.5) internal successors, (70), 32 states have internal predecessors, (70), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) Word has length 60 [2022-11-20 11:05:08,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:08,511 INFO L225 Difference]: With dead ends: 220 [2022-11-20 11:05:08,511 INFO L226 Difference]: Without dead ends: 182 [2022-11-20 11:05:08,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=521, Invalid=2671, Unknown=0, NotChecked=0, Total=3192 [2022-11-20 11:05:08,513 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 234 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:08,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 426 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 797 Invalid, 0 Unknown, 160 Unchecked, 0.8s Time] [2022-11-20 11:05:08,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-20 11:05:08,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 140. [2022-11-20 11:05:08,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.2) internal successors, (132), 115 states have internal predecessors, (132), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (19), 15 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-20 11:05:08,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 172 transitions. [2022-11-20 11:05:08,572 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 172 transitions. Word has length 60 [2022-11-20 11:05:08,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:08,572 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 172 transitions. [2022-11-20 11:05:08,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 28 states have (on average 2.5) internal successors, (70), 32 states have internal predecessors, (70), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-20 11:05:08,573 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 172 transitions. [2022-11-20 11:05:08,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-20 11:05:08,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:08,574 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2022-11-20 11:05:08,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:08,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 11:05:08,777 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:05:08,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:08,777 INFO L85 PathProgramCache]: Analyzing trace with hash 855301133, now seen corresponding path program 1 times [2022-11-20 11:05:08,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:08,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558836768] [2022-11-20 11:05:08,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:08,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:08,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:09,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:05:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:09,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:05:09,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:09,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:05:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:09,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:05:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:09,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 11:05:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 44 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 11:05:09,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:09,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558836768] [2022-11-20 11:05:09,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558836768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:09,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447275832] [2022-11-20 11:05:09,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:09,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:09,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:09,336 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:09,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:05:09,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:09,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-20 11:05:09,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:09,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 11:05:10,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-20 11:05:10,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:05:10,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-20 11:05:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 11:05:10,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:10,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:05:10,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-20 11:05:10,318 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:05:10,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2022-11-20 11:05:10,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 11:05:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 11:05:10,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447275832] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:10,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:05:10,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 16] total 35 [2022-11-20 11:05:10,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179125347] [2022-11-20 11:05:10,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:10,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 11:05:10,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:10,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 11:05:10,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 11:05:10,865 INFO L87 Difference]: Start difference. First operand 140 states and 172 transitions. Second operand has 35 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 33 states have internal predecessors, (83), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-20 11:05:12,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:12,716 INFO L93 Difference]: Finished difference Result 196 states and 246 transitions. [2022-11-20 11:05:12,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 11:05:12,717 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 33 states have internal predecessors, (83), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 62 [2022-11-20 11:05:12,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:12,722 INFO L225 Difference]: With dead ends: 196 [2022-11-20 11:05:12,722 INFO L226 Difference]: Without dead ends: 194 [2022-11-20 11:05:12,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=848, Invalid=2934, Unknown=0, NotChecked=0, Total=3782 [2022-11-20 11:05:12,725 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 204 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:12,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 472 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:05:12,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-20 11:05:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 113. [2022-11-20 11:05:12,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 88 states have (on average 1.1704545454545454) internal successors, (103), 91 states have internal predecessors, (103), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-20 11:05:12,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 135 transitions. [2022-11-20 11:05:12,799 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 135 transitions. Word has length 62 [2022-11-20 11:05:12,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:12,799 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 135 transitions. [2022-11-20 11:05:12,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 33 states have internal predecessors, (83), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-20 11:05:12,800 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 135 transitions. [2022-11-20 11:05:12,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 11:05:12,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:12,801 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 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] [2022-11-20 11:05:12,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:13,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 11:05:13,007 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:05:13,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:13,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1469994072, now seen corresponding path program 6 times [2022-11-20 11:05:13,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:13,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634670801] [2022-11-20 11:05:13,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:13,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:21,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:05:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:21,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:05:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:21,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:05:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:21,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:05:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 37 proven. 51 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 11:05:21,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:21,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634670801] [2022-11-20 11:05:21,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634670801] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:21,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007597603] [2022-11-20 11:05:21,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:05:21,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:21,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:21,659 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:21,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 11:05:21,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-20 11:05:21,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:05:21,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-20 11:05:21,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:21,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-20 11:05:23,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-20 11:05:27,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 71 [2022-11-20 11:05:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 18 proven. 81 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 11:05:56,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:06:19,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007597603] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:06:19,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:06:19,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 32] total 57 [2022-11-20 11:06:19,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598914813] [2022-11-20 11:06:19,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:06:19,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-20 11:06:19,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:06:19,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-20 11:06:19,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=6087, Unknown=14, NotChecked=0, Total=6642 [2022-11-20 11:06:19,559 INFO L87 Difference]: Start difference. First operand 113 states and 135 transitions. Second operand has 57 states, 54 states have (on average 1.4814814814814814) internal successors, (80), 53 states have internal predecessors, (80), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-20 11:08:01,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:01,931 INFO L93 Difference]: Finished difference Result 195 states and 236 transitions. [2022-11-20 11:08:01,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-20 11:08:01,931 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.4814814814814814) internal successors, (80), 53 states have internal predecessors, (80), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 63 [2022-11-20 11:08:01,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:08:01,932 INFO L225 Difference]: With dead ends: 195 [2022-11-20 11:08:01,932 INFO L226 Difference]: Without dead ends: 115 [2022-11-20 11:08:01,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4156 ImplicationChecksByTransitivity, 160.2s TimeCoverageRelationStatistics Valid=1587, Invalid=12667, Unknown=26, NotChecked=0, Total=14280 [2022-11-20 11:08:01,936 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:08:01,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 882 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 216 Invalid, 0 Unknown, 226 Unchecked, 0.5s Time] [2022-11-20 11:08:01,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-20 11:08:01,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2022-11-20 11:08:01,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 80 states have (on average 1.15) internal successors, (92), 81 states have internal predecessors, (92), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-20 11:08:01,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2022-11-20 11:08:01,983 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 63 [2022-11-20 11:08:01,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:08:01,984 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2022-11-20 11:08:01,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.4814814814814814) internal successors, (80), 53 states have internal predecessors, (80), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-20 11:08:01,984 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2022-11-20 11:08:01,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-20 11:08:01,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:01,985 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1] [2022-11-20 11:08:01,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 11:08:02,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:08:02,190 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:08:02,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:02,191 INFO L85 PathProgramCache]: Analyzing trace with hash -589711777, now seen corresponding path program 1 times [2022-11-20 11:08:02,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:08:02,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702644882] [2022-11-20 11:08:02,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:02,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:08:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:04,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:08:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:04,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:08:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:04,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:08:04,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:04,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:08:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:04,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:08:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:04,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-20 11:08:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:04,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:08:04,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:04,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-20 11:08:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 11:08:04,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:08:04,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702644882] [2022-11-20 11:08:04,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702644882] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:08:04,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499687210] [2022-11-20 11:08:04,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:04,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:08:04,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:08:04,687 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:08:04,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 11:08:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:04,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 126 conjunts are in the unsatisfiable core [2022-11-20 11:08:04,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:08:04,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-20 11:08:05,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-20 11:08:05,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 11:08:20,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:08:20,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 64 [2022-11-20 11:08:20,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:08:20,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:08:20,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 64 [2022-11-20 11:08:20,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 11:08:20,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 11:09:13,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:13,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:13,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:13,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:13,817 INFO L321 Elim1Store]: treesize reduction 16, result has 82.0 percent of original size [2022-11-20 11:09:13,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 95 treesize of output 147 [2022-11-20 11:09:13,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-11-20 11:09:13,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-11-20 11:09:14,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-11-20 11:09:14,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2022-11-20 11:09:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 24 proven. 31 refuted. 5 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 11:09:14,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:09:16,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:09:16,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 11:09:18,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499687210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:09:18,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:09:18,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 32] total 43 [2022-11-20 11:09:18,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629811916] [2022-11-20 11:09:18,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:09:18,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 11:09:18,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:18,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 11:09:18,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=3010, Unknown=19, NotChecked=0, Total=3422 [2022-11-20 11:09:18,703 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 43 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 41 states have internal predecessors, (76), 11 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (15), 8 states have call predecessors, (15), 10 states have call successors, (15) [2022-11-20 11:09:26,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:26,531 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2022-11-20 11:09:26,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-20 11:09:26,532 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 41 states have internal predecessors, (76), 11 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (15), 8 states have call predecessors, (15), 10 states have call successors, (15) Word has length 69 [2022-11-20 11:09:26,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:26,533 INFO L225 Difference]: With dead ends: 131 [2022-11-20 11:09:26,533 INFO L226 Difference]: Without dead ends: 80 [2022-11-20 11:09:26,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 90 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1716 ImplicationChecksByTransitivity, 77.5s TimeCoverageRelationStatistics Valid=523, Invalid=4150, Unknown=19, NotChecked=0, Total=4692 [2022-11-20 11:09:26,535 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:26,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 305 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 173 Invalid, 0 Unknown, 288 Unchecked, 0.2s Time] [2022-11-20 11:09:26,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-20 11:09:26,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-20 11:09:26,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 66 states have internal predecessors, (71), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 11:09:26,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2022-11-20 11:09:26,568 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 69 [2022-11-20 11:09:26,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:26,568 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2022-11-20 11:09:26,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 41 states have internal predecessors, (76), 11 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (15), 8 states have call predecessors, (15), 10 states have call successors, (15) [2022-11-20 11:09:26,569 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2022-11-20 11:09:26,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-20 11:09:26,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:26,570 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 3, 3, 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] [2022-11-20 11:09:26,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 11:09:26,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:09:26,777 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:09:26,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:26,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1913317232, now seen corresponding path program 1 times [2022-11-20 11:09:26,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:26,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372437900] [2022-11-20 11:09:26,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:26,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:26,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:09:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:26,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:09:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:26,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:09:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:26,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:09:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:26,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 11:09:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:26,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-20 11:09:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:26,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-20 11:09:26,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 11:09:26,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:26,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372437900] [2022-11-20 11:09:26,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372437900] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:09:26,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935830181] [2022-11-20 11:09:26,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:26,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:09:26,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:09:26,959 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:09:26,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 11:09:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:27,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:09:27,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 11:09:27,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:09:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 34 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 11:09:27,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935830181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:09:27,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:09:27,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-11-20 11:09:27,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329345760] [2022-11-20 11:09:27,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:09:27,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:09:27,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:27,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:09:27,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:09:27,224 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:09:27,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:27,461 INFO L93 Difference]: Finished difference Result 150 states and 162 transitions. [2022-11-20 11:09:27,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:09:27,461 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 75 [2022-11-20 11:09:27,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:27,462 INFO L225 Difference]: With dead ends: 150 [2022-11-20 11:09:27,462 INFO L226 Difference]: Without dead ends: 96 [2022-11-20 11:09:27,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 155 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:09:27,463 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 33 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:27,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 231 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:09:27,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-20 11:09:27,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 73. [2022-11-20 11:09:27,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 11:09:27,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2022-11-20 11:09:27,500 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 75 [2022-11-20 11:09:27,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:27,500 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2022-11-20 11:09:27,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:09:27,500 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2022-11-20 11:09:27,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-20 11:09:27,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:27,502 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 4, 3, 3, 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] [2022-11-20 11:09:27,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 11:09:27,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 11:09:27,707 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:09:27,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:27,707 INFO L85 PathProgramCache]: Analyzing trace with hash -264875332, now seen corresponding path program 2 times [2022-11-20 11:09:27,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:27,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790242562] [2022-11-20 11:09:27,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:27,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:27,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:09:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:27,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:09:27,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:27,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:09:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:27,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:09:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:27,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-20 11:09:27,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:27,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-20 11:09:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:27,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-20 11:09:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 26 proven. 66 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 11:09:27,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:27,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790242562] [2022-11-20 11:09:27,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790242562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:09:27,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472453955] [2022-11-20 11:09:27,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:09:27,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:09:27,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:09:27,943 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:09:27,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 11:09:28,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:09:28,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:28,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:09:28,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 11:09:28,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:09:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 26 proven. 66 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 11:09:28,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472453955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:09:28,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:09:28,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2022-11-20 11:09:28,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482893372] [2022-11-20 11:09:28,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:09:28,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:09:28,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:28,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:09:28,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:09:28,297 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:09:28,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:28,536 INFO L93 Difference]: Finished difference Result 156 states and 171 transitions. [2022-11-20 11:09:28,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:09:28,537 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 78 [2022-11-20 11:09:28,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:28,538 INFO L225 Difference]: With dead ends: 156 [2022-11-20 11:09:28,538 INFO L226 Difference]: Without dead ends: 103 [2022-11-20 11:09:28,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 159 SyntacticMatches, 11 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:09:28,539 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 56 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:28,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 203 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:09:28,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-20 11:09:28,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 79. [2022-11-20 11:09:28,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 11:09:28,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2022-11-20 11:09:28,578 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 78 [2022-11-20 11:09:28,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:28,578 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2022-11-20 11:09:28,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:09:28,583 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2022-11-20 11:09:28,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-20 11:09:28,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:28,585 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 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] [2022-11-20 11:09:28,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 11:09:28,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 11:09:28,791 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:09:28,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:28,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1861325808, now seen corresponding path program 3 times [2022-11-20 11:09:28,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:28,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260237889] [2022-11-20 11:09:28,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:28,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:29,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:09:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:29,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:09:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:29,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:09:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:29,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:09:29,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:29,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-20 11:09:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:29,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-20 11:09:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:29,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-20 11:09:29,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 79 proven. 7 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-20 11:09:29,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:29,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260237889] [2022-11-20 11:09:29,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260237889] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:09:29,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214801330] [2022-11-20 11:09:29,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:09:29,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:09:29,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:09:29,464 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:09:29,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 11:09:29,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 11:09:29,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:29,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 11:09:29,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:29,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 11:09:30,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:30,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-20 11:09:30,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 11:09:30,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 11:09:30,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2022-11-20 11:09:30,802 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 80 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-20 11:09:30,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:09:30,901 INFO L321 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2022-11-20 11:09:30,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 92 treesize of output 84 [2022-11-20 11:09:30,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:09:30,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-11-20 11:09:30,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:09:30,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 182 treesize of output 210 [2022-11-20 11:09:30,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:09:30,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 158 [2022-11-20 11:09:31,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:09:31,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 66 [2022-11-20 11:09:31,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 11:09:31,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 11:09:31,937 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:09:31,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-11-20 11:09:31,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 11:09:32,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:09:32,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 154 [2022-11-20 11:09:32,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 125 [2022-11-20 11:09:32,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-20 11:09:32,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-20 11:09:32,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 11:09:32,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:09:32,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 167 [2022-11-20 11:09:32,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 11:09:32,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-20 11:09:32,700 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:09:32,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 71 [2022-11-20 11:09:32,929 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:09:32,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 79 [2022-11-20 11:09:32,948 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:09:32,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-11-20 11:09:33,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:33,060 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:09:33,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 37 [2022-11-20 11:09:33,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-20 11:09:33,134 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:09:33,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 99 [2022-11-20 11:09:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-20 11:09:33,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214801330] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:09:33,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:09:33,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [15, 14] total 31 [2022-11-20 11:09:33,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437119365] [2022-11-20 11:09:33,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:33,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:09:33,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:33,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:09:33,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-11-20 11:09:33,890 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 11 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 11:09:34,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:34,115 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2022-11-20 11:09:34,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:09:34,115 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 81 [2022-11-20 11:09:34,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:34,115 INFO L225 Difference]: With dead ends: 79 [2022-11-20 11:09:34,116 INFO L226 Difference]: Without dead ends: 0 [2022-11-20 11:09:34,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 154 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:09:34,117 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:34,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 147 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:09:34,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-20 11:09:34,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-20 11:09:34,118 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) [2022-11-20 11:09:34,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-20 11:09:34,119 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 81 [2022-11-20 11:09:34,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:34,119 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-20 11:09:34,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 11:09:34,120 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-20 11:09:34,120 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-20 11:09:34,123 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 11:09:34,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 11:09:34,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9f3235e-0cb7-498b-be15-ccb964bdaf1a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:09:34,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.