./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8 --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 c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a --- 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-2329fc7 [2022-12-13 19:54:20,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:54:20,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:54:20,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:54:20,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:54:20,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:54:20,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:54:20,724 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:54:20,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:54:20,726 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:54:20,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:54:20,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:54:20,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:54:20,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:54:20,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:54:20,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:54:20,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:54:20,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:54:20,735 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:54:20,737 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:54:20,738 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:54:20,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:54:20,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:54:20,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:54:20,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:54:20,745 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:54:20,745 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:54:20,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:54:20,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:54:20,747 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:54:20,747 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:54:20,748 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:54:20,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:54:20,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:54:20,750 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:54:20,750 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:54:20,751 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:54:20,751 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:54:20,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:54:20,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:54:20,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:54:20,753 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 19:54:20,772 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:54:20,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:54:20,772 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:54:20,773 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:54:20,773 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:54:20,773 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:54:20,774 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:54:20,774 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:54:20,774 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:54:20,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:54:20,775 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:54:20,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:54:20,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:54:20,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:54:20,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 19:54:20,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:54:20,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 19:54:20,776 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:54:20,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 19:54:20,776 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:54:20,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 19:54:20,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:54:20,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:54:20,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:54:20,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:54:20,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:54:20,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:54:20,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 19:54:20,777 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:54:20,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:54:20,777 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:54:20,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 19:54:20,778 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:54:20,778 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:54:20,778 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:54:20,778 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a [2022-12-13 19:54:20,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:54:20,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:54:20,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:54:21,000 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:54:21,000 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:54:21,002 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2022-12-13 19:54:23,528 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:54:23,689 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:54:23,690 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2022-12-13 19:54:23,695 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/data/6383701fc/a351b7f2a5b34f9c9f3a7642fbe57b01/FLAGc636402ca [2022-12-13 19:54:23,705 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/data/6383701fc/a351b7f2a5b34f9c9f3a7642fbe57b01 [2022-12-13 19:54:23,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:54:23,708 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:54:23,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:54:23,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:54:23,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:54:23,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:54:23" (1/1) ... [2022-12-13 19:54:23,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46f9fd6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:54:23, skipping insertion in model container [2022-12-13 19:54:23,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:54:23" (1/1) ... [2022-12-13 19:54:23,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:54:23,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:54:23,848 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_5a752cad-a80a-4dd2-9318-f976dbfee7f7/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c[730,743] [2022-12-13 19:54:23,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:54:23,901 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:54:23,910 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_5a752cad-a80a-4dd2-9318-f976dbfee7f7/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c[730,743] [2022-12-13 19:54:23,930 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:54:23,940 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:54:23,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:54:23 WrapperNode [2022-12-13 19:54:23,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:54:23,941 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:54:23,941 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:54:23,942 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:54:23,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:54:23" (1/1) ... [2022-12-13 19:54:23,954 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:54:23" (1/1) ... [2022-12-13 19:54:23,968 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2022-12-13 19:54:23,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:54:23,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:54:23,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:54:23,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:54:23,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:54:23" (1/1) ... [2022-12-13 19:54:23,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:54:23" (1/1) ... [2022-12-13 19:54:23,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:54:23" (1/1) ... [2022-12-13 19:54:23,981 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:54:23" (1/1) ... [2022-12-13 19:54:23,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:54:23" (1/1) ... [2022-12-13 19:54:23,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:54:23" (1/1) ... [2022-12-13 19:54:23,995 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:54:23" (1/1) ... [2022-12-13 19:54:23,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:54:23" (1/1) ... [2022-12-13 19:54:23,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:54:24,000 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:54:24,000 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:54:24,000 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:54:24,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:54:23" (1/1) ... [2022-12-13 19:54:24,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:54:24,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:54:24,028 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:54:24,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:54:24,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:54:24,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 19:54:24,065 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-12-13 19:54:24,065 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-12-13 19:54:24,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:54:24,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:54:24,065 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2022-12-13 19:54:24,065 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2022-12-13 19:54:24,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 19:54:24,065 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 19:54:24,124 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:54:24,125 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:54:24,338 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:54:24,344 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:54:24,344 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 19:54:24,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:54:24 BoogieIcfgContainer [2022-12-13 19:54:24,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:54:24,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:54:24,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:54:24,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:54:24,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:54:23" (1/3) ... [2022-12-13 19:54:24,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@617880a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:54:24, skipping insertion in model container [2022-12-13 19:54:24,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:54:23" (2/3) ... [2022-12-13 19:54:24,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@617880a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:54:24, skipping insertion in model container [2022-12-13 19:54:24,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:54:24" (3/3) ... [2022-12-13 19:54:24,352 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2022-12-13 19:54:24,366 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:54:24,366 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 19:54:24,401 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:54:24,406 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;@1e9f0460, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:54:24,406 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 19:54:24,409 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 62 states have (on average 1.564516129032258) internal successors, (97), 63 states have internal predecessors, (97), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 19:54:24,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 19:54:24,416 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:24,416 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-12-13 19:54:24,417 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:24,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:24,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1494196714, now seen corresponding path program 1 times [2022-12-13 19:54:24,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:24,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089646848] [2022-12-13 19:54:24,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:24,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:24,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:24,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:24,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:54:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 19:54:24,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:24,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089646848] [2022-12-13 19:54:24,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089646848] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:54:24,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101446842] [2022-12-13 19:54:24,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:24,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:24,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:54:24,880 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:54:24,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 19:54:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:24,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 19:54:24,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 19:54:25,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:54:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 19:54:25,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101446842] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:54:25,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:54:25,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9, 5] total 13 [2022-12-13 19:54:25,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631703811] [2022-12-13 19:54:25,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:54:25,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:54:25,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:25,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:54:25,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-12-13 19:54:25,115 INFO L87 Difference]: Start difference. First operand has 76 states, 62 states have (on average 1.564516129032258) internal successors, (97), 63 states have internal predecessors, (97), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 19:54:25,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:25,160 INFO L93 Difference]: Finished difference Result 152 states and 239 transitions. [2022-12-13 19:54:25,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:54:25,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-12-13 19:54:25,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:25,171 INFO L225 Difference]: With dead ends: 152 [2022-12-13 19:54:25,171 INFO L226 Difference]: Without dead ends: 75 [2022-12-13 19:54:25,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-12-13 19:54:25,178 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 33 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:25,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 173 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:54:25,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-13 19:54:25,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2022-12-13 19:54:25,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 60 states have internal predecessors, (86), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 19:54:25,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 103 transitions. [2022-12-13 19:54:25,213 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 103 transitions. Word has length 39 [2022-12-13 19:54:25,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:25,213 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 103 transitions. [2022-12-13 19:54:25,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 19:54:25,214 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 103 transitions. [2022-12-13 19:54:25,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 19:54:25,215 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:25,215 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:54:25,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 19:54:25,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-13 19:54:25,418 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:25,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:25,421 INFO L85 PathProgramCache]: Analyzing trace with hash 237309308, now seen corresponding path program 1 times [2022-12-13 19:54:25,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:25,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831090796] [2022-12-13 19:54:25,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:25,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:25,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:25,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:25,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:54:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 19:54:25,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:25,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831090796] [2022-12-13 19:54:25,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831090796] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:54:25,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647228287] [2022-12-13 19:54:25,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:25,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:25,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:54:25,681 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:54:25,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 19:54:25,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:25,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 19:54:25,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 19:54:25,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:54:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 19:54:25,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647228287] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:54:25,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:54:25,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-12-13 19:54:25,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035344467] [2022-12-13 19:54:25,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:54:25,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 19:54:25,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:25,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 19:54:25,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-12-13 19:54:25,955 INFO L87 Difference]: Start difference. First operand 72 states and 103 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 17 states have internal predecessors, (55), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 19:54:26,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:26,125 INFO L93 Difference]: Finished difference Result 193 states and 282 transitions. [2022-12-13 19:54:26,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 19:54:26,126 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 17 states have internal predecessors, (55), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 40 [2022-12-13 19:54:26,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:26,128 INFO L225 Difference]: With dead ends: 193 [2022-12-13 19:54:26,129 INFO L226 Difference]: Without dead ends: 148 [2022-12-13 19:54:26,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-12-13 19:54:26,131 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 178 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:26,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1213 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:54:26,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-12-13 19:54:26,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2022-12-13 19:54:26,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 91 states have (on average 1.4285714285714286) internal successors, (130), 93 states have internal predecessors, (130), 14 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2022-12-13 19:54:26,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 161 transitions. [2022-12-13 19:54:26,146 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 161 transitions. Word has length 40 [2022-12-13 19:54:26,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:26,147 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 161 transitions. [2022-12-13 19:54:26,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 17 states have internal predecessors, (55), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 19:54:26,147 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 161 transitions. [2022-12-13 19:54:26,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 19:54:26,148 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:26,149 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:54:26,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 19:54:26,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:26,350 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:26,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:26,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1042554370, now seen corresponding path program 1 times [2022-12-13 19:54:26,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:26,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204348550] [2022-12-13 19:54:26,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:26,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:26,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:26,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:26,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:54:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 19:54:26,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:26,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204348550] [2022-12-13 19:54:26,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204348550] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:54:26,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:54:26,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 19:54:26,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127995644] [2022-12-13 19:54:26,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:54:26,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 19:54:26,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:26,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 19:54:26,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:54:26,569 INFO L87 Difference]: Start difference. First operand 111 states and 161 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 19:54:26,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:26,643 INFO L93 Difference]: Finished difference Result 208 states and 297 transitions. [2022-12-13 19:54:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:54:26,644 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-12-13 19:54:26,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:26,646 INFO L225 Difference]: With dead ends: 208 [2022-12-13 19:54:26,646 INFO L226 Difference]: Without dead ends: 134 [2022-12-13 19:54:26,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:54:26,648 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 17 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:26,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 666 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:54:26,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-12-13 19:54:26,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2022-12-13 19:54:26,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 97 states have (on average 1.402061855670103) internal successors, (136), 99 states have internal predecessors, (136), 15 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2022-12-13 19:54:26,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2022-12-13 19:54:26,660 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 40 [2022-12-13 19:54:26,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:26,660 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2022-12-13 19:54:26,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 19:54:26,661 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2022-12-13 19:54:26,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 19:54:26,662 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:26,662 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-12-13 19:54:26,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 19:54:26,663 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:26,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:26,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1148734548, now seen corresponding path program 1 times [2022-12-13 19:54:26,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:26,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127477470] [2022-12-13 19:54:26,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:26,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:26,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:26,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:26,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:54:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:26,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 19:54:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:26,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-12-13 19:54:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 19:54:26,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:26,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127477470] [2022-12-13 19:54:26,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127477470] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:54:26,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:54:26,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 19:54:26,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498133028] [2022-12-13 19:54:26,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:54:26,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:54:26,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:26,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:54:26,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:54:26,901 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-13 19:54:27,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:27,066 INFO L93 Difference]: Finished difference Result 179 states and 256 transitions. [2022-12-13 19:54:27,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 19:54:27,066 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 44 [2022-12-13 19:54:27,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:27,068 INFO L225 Difference]: With dead ends: 179 [2022-12-13 19:54:27,068 INFO L226 Difference]: Without dead ends: 168 [2022-12-13 19:54:27,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-13 19:54:27,069 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 92 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:27,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 1046 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:54:27,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-12-13 19:54:27,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 153. [2022-12-13 19:54:27,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 125 states have (on average 1.416) internal successors, (177), 128 states have internal predecessors, (177), 20 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (25), 19 states have call predecessors, (25), 19 states have call successors, (25) [2022-12-13 19:54:27,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 222 transitions. [2022-12-13 19:54:27,086 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 222 transitions. Word has length 44 [2022-12-13 19:54:27,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:27,086 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 222 transitions. [2022-12-13 19:54:27,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-13 19:54:27,087 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 222 transitions. [2022-12-13 19:54:27,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 19:54:27,088 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:27,088 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-12-13 19:54:27,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 19:54:27,089 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:27,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:27,089 INFO L85 PathProgramCache]: Analyzing trace with hash -447669970, now seen corresponding path program 1 times [2022-12-13 19:54:27,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:27,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690853004] [2022-12-13 19:54:27,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:27,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:27,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:27,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:27,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:54:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:27,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 19:54:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:27,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-12-13 19:54:27,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 19:54:27,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:27,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690853004] [2022-12-13 19:54:27,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690853004] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:54:27,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:54:27,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-12-13 19:54:27,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188748535] [2022-12-13 19:54:27,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:54:27,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 19:54:27,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:27,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 19:54:27,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-12-13 19:54:27,393 INFO L87 Difference]: Start difference. First operand 153 states and 222 transitions. Second operand has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 19:54:27,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:27,642 INFO L93 Difference]: Finished difference Result 187 states and 266 transitions. [2022-12-13 19:54:27,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 19:54:27,642 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2022-12-13 19:54:27,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:27,644 INFO L225 Difference]: With dead ends: 187 [2022-12-13 19:54:27,644 INFO L226 Difference]: Without dead ends: 179 [2022-12-13 19:54:27,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-12-13 19:54:27,646 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 75 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:27,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 1685 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 19:54:27,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-12-13 19:54:27,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 161. [2022-12-13 19:54:27,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 132 states have (on average 1.4015151515151516) internal successors, (185), 134 states have internal predecessors, (185), 20 states have call successors, (20), 5 states have call predecessors, (20), 8 states have return successors, (28), 21 states have call predecessors, (28), 19 states have call successors, (28) [2022-12-13 19:54:27,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 233 transitions. [2022-12-13 19:54:27,660 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 233 transitions. Word has length 44 [2022-12-13 19:54:27,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:27,660 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 233 transitions. [2022-12-13 19:54:27,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 19:54:27,660 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 233 transitions. [2022-12-13 19:54:27,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 19:54:27,661 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:27,661 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1] [2022-12-13 19:54:27,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 19:54:27,662 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:27,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:27,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1178693971, now seen corresponding path program 1 times [2022-12-13 19:54:27,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:27,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953239615] [2022-12-13 19:54:27,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:27,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:27,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:27,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:27,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:54:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 19:54:27,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:27,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953239615] [2022-12-13 19:54:27,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953239615] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:54:27,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:54:27,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 19:54:27,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229069744] [2022-12-13 19:54:27,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:54:27,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 19:54:27,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:27,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 19:54:27,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:54:27,731 INFO L87 Difference]: Start difference. First operand 161 states and 233 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 19:54:27,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:27,830 INFO L93 Difference]: Finished difference Result 374 states and 549 transitions. [2022-12-13 19:54:27,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:54:27,831 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-12-13 19:54:27,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:27,832 INFO L225 Difference]: With dead ends: 374 [2022-12-13 19:54:27,833 INFO L226 Difference]: Without dead ends: 275 [2022-12-13 19:54:27,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:54:27,834 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 115 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:27,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 1056 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:54:27,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-12-13 19:54:27,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 241. [2022-12-13 19:54:27,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 201 states have (on average 1.407960199004975) internal successors, (283), 204 states have internal predecessors, (283), 28 states have call successors, (28), 7 states have call predecessors, (28), 11 states have return successors, (40), 29 states have call predecessors, (40), 27 states have call successors, (40) [2022-12-13 19:54:27,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 351 transitions. [2022-12-13 19:54:27,847 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 351 transitions. Word has length 44 [2022-12-13 19:54:27,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:27,848 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 351 transitions. [2022-12-13 19:54:27,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 19:54:27,848 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 351 transitions. [2022-12-13 19:54:27,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 19:54:27,849 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:27,849 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1] [2022-12-13 19:54:27,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 19:54:27,849 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:27,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:27,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1988040597, now seen corresponding path program 1 times [2022-12-13 19:54:27,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:27,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103972008] [2022-12-13 19:54:27,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:27,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:27,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:27,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:27,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:54:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:27,993 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 19:54:27,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:27,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103972008] [2022-12-13 19:54:27,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103972008] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:54:27,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723851562] [2022-12-13 19:54:27,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:27,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:27,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:54:27,995 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:54:27,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 19:54:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:28,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 19:54:28,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 19:54:28,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:54:28,176 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 19:54:28,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723851562] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 19:54:28,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:54:28,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 6] total 15 [2022-12-13 19:54:28,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961970300] [2022-12-13 19:54:28,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:54:28,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:54:28,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:28,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:54:28,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-12-13 19:54:28,178 INFO L87 Difference]: Start difference. First operand 241 states and 351 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 19:54:28,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:28,209 INFO L93 Difference]: Finished difference Result 375 states and 544 transitions. [2022-12-13 19:54:28,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:54:28,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-12-13 19:54:28,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:28,212 INFO L225 Difference]: With dead ends: 375 [2022-12-13 19:54:28,212 INFO L226 Difference]: Without dead ends: 203 [2022-12-13 19:54:28,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-12-13 19:54:28,213 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 74 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:28,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 162 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:54:28,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-12-13 19:54:28,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 181. [2022-12-13 19:54:28,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 149 states have (on average 1.3758389261744965) internal successors, (205), 152 states have internal predecessors, (205), 21 states have call successors, (21), 6 states have call predecessors, (21), 10 states have return successors, (33), 22 states have call predecessors, (33), 20 states have call successors, (33) [2022-12-13 19:54:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 259 transitions. [2022-12-13 19:54:28,230 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 259 transitions. Word has length 44 [2022-12-13 19:54:28,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:28,231 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 259 transitions. [2022-12-13 19:54:28,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 19:54:28,231 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 259 transitions. [2022-12-13 19:54:28,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 19:54:28,232 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:28,232 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-12-13 19:54:28,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 19:54:28,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 19:54:28,433 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:28,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:28,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1299374066, now seen corresponding path program 1 times [2022-12-13 19:54:28,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:28,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033413579] [2022-12-13 19:54:28,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:28,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:28,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:28,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:28,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:54:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:28,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 19:54:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:28,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-12-13 19:54:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 19:54:28,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:28,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033413579] [2022-12-13 19:54:28,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033413579] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:54:28,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:54:28,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 19:54:28,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355239151] [2022-12-13 19:54:28,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:54:28,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:54:28,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:28,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:54:28,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:54:28,604 INFO L87 Difference]: Start difference. First operand 181 states and 259 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-13 19:54:28,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:28,633 INFO L93 Difference]: Finished difference Result 189 states and 266 transitions. [2022-12-13 19:54:28,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 19:54:28,633 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2022-12-13 19:54:28,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:28,634 INFO L225 Difference]: With dead ends: 189 [2022-12-13 19:54:28,634 INFO L226 Difference]: Without dead ends: 178 [2022-12-13 19:54:28,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:54:28,635 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 7 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:28,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 482 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:54:28,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-12-13 19:54:28,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2022-12-13 19:54:28,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 144 states have (on average 1.375) internal successors, (198), 147 states have internal predecessors, (198), 21 states have call successors, (21), 6 states have call predecessors, (21), 9 states have return successors, (30), 21 states have call predecessors, (30), 20 states have call successors, (30) [2022-12-13 19:54:28,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 249 transitions. [2022-12-13 19:54:28,644 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 249 transitions. Word has length 46 [2022-12-13 19:54:28,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:28,644 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 249 transitions. [2022-12-13 19:54:28,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-13 19:54:28,644 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 249 transitions. [2022-12-13 19:54:28,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-13 19:54:28,645 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:28,645 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:54:28,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 19:54:28,646 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:28,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:28,646 INFO L85 PathProgramCache]: Analyzing trace with hash -662590119, now seen corresponding path program 1 times [2022-12-13 19:54:28,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:28,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145145788] [2022-12-13 19:54:28,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:28,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:28,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:28,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:28,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:28,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:54:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:28,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-12-13 19:54:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:28,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-12-13 19:54:28,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 19:54:28,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:28,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145145788] [2022-12-13 19:54:28,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145145788] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:54:28,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:54:28,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 19:54:28,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293382701] [2022-12-13 19:54:28,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:54:28,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 19:54:28,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:28,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 19:54:28,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-13 19:54:28,817 INFO L87 Difference]: Start difference. First operand 175 states and 249 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 19:54:28,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:28,982 INFO L93 Difference]: Finished difference Result 229 states and 323 transitions. [2022-12-13 19:54:28,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:54:28,982 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2022-12-13 19:54:28,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:28,983 INFO L225 Difference]: With dead ends: 229 [2022-12-13 19:54:28,984 INFO L226 Difference]: Without dead ends: 218 [2022-12-13 19:54:28,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-13 19:54:28,984 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 86 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:28,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 975 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:54:28,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-12-13 19:54:29,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 182. [2022-12-13 19:54:29,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 148 states have (on average 1.364864864864865) internal successors, (202), 152 states have internal predecessors, (202), 23 states have call successors, (23), 6 states have call predecessors, (23), 10 states have return successors, (35), 23 states have call predecessors, (35), 22 states have call successors, (35) [2022-12-13 19:54:29,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 260 transitions. [2022-12-13 19:54:29,002 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 260 transitions. Word has length 48 [2022-12-13 19:54:29,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:29,003 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 260 transitions. [2022-12-13 19:54:29,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 19:54:29,003 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 260 transitions. [2022-12-13 19:54:29,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-13 19:54:29,004 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:29,004 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-13 19:54:29,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 19:54:29,004 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:29,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:29,005 INFO L85 PathProgramCache]: Analyzing trace with hash 38474459, now seen corresponding path program 1 times [2022-12-13 19:54:29,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:29,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379970950] [2022-12-13 19:54:29,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:29,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:29,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:29,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:29,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:54:29,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:29,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-12-13 19:54:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:29,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-12-13 19:54:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 19:54:29,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:29,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379970950] [2022-12-13 19:54:29,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379970950] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:54:29,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791934752] [2022-12-13 19:54:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:29,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:29,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:54:29,252 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:54:29,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 19:54:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:29,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 19:54:29,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 19:54:29,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:54:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 19:54:29,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791934752] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:54:29,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:54:29,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2022-12-13 19:54:29,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570063593] [2022-12-13 19:54:29,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:54:29,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 19:54:29,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:29,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 19:54:29,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2022-12-13 19:54:29,856 INFO L87 Difference]: Start difference. First operand 182 states and 260 transitions. Second operand has 32 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2022-12-13 19:54:31,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:31,603 INFO L93 Difference]: Finished difference Result 352 states and 515 transitions. [2022-12-13 19:54:31,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 19:54:31,604 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) Word has length 48 [2022-12-13 19:54:31,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:31,607 INFO L225 Difference]: With dead ends: 352 [2022-12-13 19:54:31,607 INFO L226 Difference]: Without dead ends: 340 [2022-12-13 19:54:31,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=404, Invalid=3502, Unknown=0, NotChecked=0, Total=3906 [2022-12-13 19:54:31,608 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 351 mSDsluCounter, 4041 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 4239 SdHoareTripleChecker+Invalid, 1969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:31,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 4239 Invalid, 1969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1880 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 19:54:31,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-12-13 19:54:31,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 221. [2022-12-13 19:54:31,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 176 states have (on average 1.3238636363636365) internal successors, (233), 184 states have internal predecessors, (233), 28 states have call successors, (28), 7 states have call predecessors, (28), 16 states have return successors, (66), 29 states have call predecessors, (66), 27 states have call successors, (66) [2022-12-13 19:54:31,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 327 transitions. [2022-12-13 19:54:31,625 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 327 transitions. Word has length 48 [2022-12-13 19:54:31,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:31,625 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 327 transitions. [2022-12-13 19:54:31,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2022-12-13 19:54:31,625 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 327 transitions. [2022-12-13 19:54:31,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-13 19:54:31,627 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:31,627 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-13 19:54:31,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 19:54:31,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 19:54:31,827 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:31,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:31,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1608873757, now seen corresponding path program 2 times [2022-12-13 19:54:31,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:31,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815297920] [2022-12-13 19:54:31,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:31,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:31,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:31,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:31,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-12-13 19:54:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:31,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-12-13 19:54:31,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:31,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-12-13 19:54:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:32,023 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 19:54:32,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:32,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815297920] [2022-12-13 19:54:32,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815297920] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:54:32,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514793622] [2022-12-13 19:54:32,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:54:32,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:32,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:54:32,024 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:54:32,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 19:54:32,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:54:32,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:54:32,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 19:54:32,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 19:54:32,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:54:32,607 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 19:54:32,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514793622] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:54:32,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:54:32,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2022-12-13 19:54:32,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382008262] [2022-12-13 19:54:32,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:54:32,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 19:54:32,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:32,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 19:54:32,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2022-12-13 19:54:32,610 INFO L87 Difference]: Start difference. First operand 221 states and 327 transitions. Second operand has 32 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 25 states have internal predecessors, (51), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-13 19:54:34,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:34,181 INFO L93 Difference]: Finished difference Result 393 states and 624 transitions. [2022-12-13 19:54:34,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 19:54:34,181 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 25 states have internal predecessors, (51), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) Word has length 48 [2022-12-13 19:54:34,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:34,183 INFO L225 Difference]: With dead ends: 393 [2022-12-13 19:54:34,183 INFO L226 Difference]: Without dead ends: 380 [2022-12-13 19:54:34,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=357, Invalid=3183, Unknown=0, NotChecked=0, Total=3540 [2022-12-13 19:54:34,184 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 351 mSDsluCounter, 4053 mSDsCounter, 0 mSdLazyCounter, 2212 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 4246 SdHoareTripleChecker+Invalid, 2296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:34,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 4246 Invalid, 2296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2212 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 19:54:34,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-12-13 19:54:34,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 241. [2022-12-13 19:54:34,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 187 states have (on average 1.304812834224599) internal successors, (244), 197 states have internal predecessors, (244), 35 states have call successors, (35), 7 states have call predecessors, (35), 18 states have return successors, (105), 36 states have call predecessors, (105), 34 states have call successors, (105) [2022-12-13 19:54:34,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 384 transitions. [2022-12-13 19:54:34,206 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 384 transitions. Word has length 48 [2022-12-13 19:54:34,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:34,206 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 384 transitions. [2022-12-13 19:54:34,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 25 states have internal predecessors, (51), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-13 19:54:34,206 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 384 transitions. [2022-12-13 19:54:34,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-13 19:54:34,207 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:34,207 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2022-12-13 19:54:34,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 19:54:34,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:34,408 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:34,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:34,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1889190333, now seen corresponding path program 1 times [2022-12-13 19:54:34,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:34,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22218281] [2022-12-13 19:54:34,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:34,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:34,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:34,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:34,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:54:34,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:34,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 19:54:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 19:54:34,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:34,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22218281] [2022-12-13 19:54:34,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22218281] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:54:34,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070184721] [2022-12-13 19:54:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:34,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:34,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:54:34,487 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:54:34,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 19:54:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:34,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 19:54:34,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 19:54:34,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:54:34,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070184721] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:54:34,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:54:34,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2022-12-13 19:54:34,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550407563] [2022-12-13 19:54:34,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:54:34,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 19:54:34,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:34,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 19:54:34,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-12-13 19:54:34,612 INFO L87 Difference]: Start difference. First operand 241 states and 384 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 19:54:34,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:34,724 INFO L93 Difference]: Finished difference Result 404 states and 615 transitions. [2022-12-13 19:54:34,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:54:34,725 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-12-13 19:54:34,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:34,727 INFO L225 Difference]: With dead ends: 404 [2022-12-13 19:54:34,727 INFO L226 Difference]: Without dead ends: 329 [2022-12-13 19:54:34,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-12-13 19:54:34,728 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 152 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:34,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 973 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:54:34,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-12-13 19:54:34,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 298. [2022-12-13 19:54:34,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 235 states have (on average 1.3148936170212766) internal successors, (309), 246 states have internal predecessors, (309), 42 states have call successors, (42), 8 states have call predecessors, (42), 20 states have return successors, (96), 43 states have call predecessors, (96), 41 states have call successors, (96) [2022-12-13 19:54:34,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 447 transitions. [2022-12-13 19:54:34,763 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 447 transitions. Word has length 49 [2022-12-13 19:54:34,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:34,763 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 447 transitions. [2022-12-13 19:54:34,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 19:54:34,763 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 447 transitions. [2022-12-13 19:54:34,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-13 19:54:34,765 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:34,765 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2022-12-13 19:54:34,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 19:54:34,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 19:54:34,966 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:34,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:34,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1079843707, now seen corresponding path program 1 times [2022-12-13 19:54:34,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:34,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183335741] [2022-12-13 19:54:34,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:34,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:35,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:35,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:35,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:54:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:35,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 19:54:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 19:54:35,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:35,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183335741] [2022-12-13 19:54:35,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183335741] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:54:35,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66060215] [2022-12-13 19:54:35,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:35,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:35,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:54:35,161 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:54:35,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 19:54:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:35,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 19:54:35,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 19:54:35,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:54:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 19:54:35,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66060215] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:54:35,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:54:35,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-12-13 19:54:35,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335436253] [2022-12-13 19:54:35,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:54:35,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 19:54:35,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:35,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 19:54:35,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-12-13 19:54:35,354 INFO L87 Difference]: Start difference. First operand 298 states and 447 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-13 19:54:35,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:35,450 INFO L93 Difference]: Finished difference Result 461 states and 667 transitions. [2022-12-13 19:54:35,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:54:35,451 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) Word has length 49 [2022-12-13 19:54:35,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:35,453 INFO L225 Difference]: With dead ends: 461 [2022-12-13 19:54:35,453 INFO L226 Difference]: Without dead ends: 309 [2022-12-13 19:54:35,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-12-13 19:54:35,455 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 27 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:35,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1158 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:54:35,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-12-13 19:54:35,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 288. [2022-12-13 19:54:35,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 227 states have (on average 1.2995594713656389) internal successors, (295), 238 states have internal predecessors, (295), 40 states have call successors, (40), 9 states have call predecessors, (40), 20 states have return successors, (90), 40 states have call predecessors, (90), 39 states have call successors, (90) [2022-12-13 19:54:35,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 425 transitions. [2022-12-13 19:54:35,476 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 425 transitions. Word has length 49 [2022-12-13 19:54:35,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:35,476 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 425 transitions. [2022-12-13 19:54:35,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-13 19:54:35,476 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 425 transitions. [2022-12-13 19:54:35,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 19:54:35,477 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:35,477 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:54:35,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 19:54:35,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:35,678 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:35,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:35,678 INFO L85 PathProgramCache]: Analyzing trace with hash 698178595, now seen corresponding path program 1 times [2022-12-13 19:54:35,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:35,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797666158] [2022-12-13 19:54:35,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:35,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:35,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:35,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:35,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:35,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:54:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:35,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-12-13 19:54:35,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:35,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-12-13 19:54:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 19:54:35,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:35,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797666158] [2022-12-13 19:54:35,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797666158] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:54:35,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493585802] [2022-12-13 19:54:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:35,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:35,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:54:35,809 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:54:35,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 19:54:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:35,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 19:54:35,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 19:54:35,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:54:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 19:54:36,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493585802] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:54:36,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:54:36,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 22 [2022-12-13 19:54:36,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603433032] [2022-12-13 19:54:36,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:54:36,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 19:54:36,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:36,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 19:54:36,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2022-12-13 19:54:36,124 INFO L87 Difference]: Start difference. First operand 288 states and 425 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 18 states have internal predecessors, (53), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2022-12-13 19:54:36,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:36,605 INFO L93 Difference]: Finished difference Result 698 states and 1051 transitions. [2022-12-13 19:54:36,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 19:54:36,606 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 18 states have internal predecessors, (53), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) Word has length 50 [2022-12-13 19:54:36,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:36,608 INFO L225 Difference]: With dead ends: 698 [2022-12-13 19:54:36,608 INFO L226 Difference]: Without dead ends: 402 [2022-12-13 19:54:36,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 19:54:36,611 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 139 mSDsluCounter, 2238 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 2383 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:36,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 2383 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 19:54:36,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-12-13 19:54:36,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 287. [2022-12-13 19:54:36,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 227 states have (on average 1.2951541850220265) internal successors, (294), 237 states have internal predecessors, (294), 39 states have call successors, (39), 10 states have call predecessors, (39), 20 states have return successors, (88), 39 states have call predecessors, (88), 38 states have call successors, (88) [2022-12-13 19:54:36,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 421 transitions. [2022-12-13 19:54:36,643 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 421 transitions. Word has length 50 [2022-12-13 19:54:36,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:36,643 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 421 transitions. [2022-12-13 19:54:36,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 18 states have internal predecessors, (53), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2022-12-13 19:54:36,643 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 421 transitions. [2022-12-13 19:54:36,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 19:54:36,644 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:36,644 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:54:36,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 19:54:36,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 19:54:36,845 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:36,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:36,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1308875237, now seen corresponding path program 2 times [2022-12-13 19:54:36,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:36,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649738433] [2022-12-13 19:54:36,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:36,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:36,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:36,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:36,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-12-13 19:54:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:36,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-12-13 19:54:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:36,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-12-13 19:54:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 19:54:36,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:36,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649738433] [2022-12-13 19:54:36,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649738433] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:54:36,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582802858] [2022-12-13 19:54:36,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:54:36,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:36,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:54:36,972 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:54:36,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 19:54:37,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:54:37,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:54:37,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 19:54:37,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 19:54:37,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:54:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 19:54:37,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582802858] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:54:37,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:54:37,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 10] total 21 [2022-12-13 19:54:37,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817010439] [2022-12-13 19:54:37,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:54:37,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 19:54:37,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:37,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 19:54:37,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-12-13 19:54:37,315 INFO L87 Difference]: Start difference. First operand 287 states and 421 transitions. Second operand has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-13 19:54:37,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:37,882 INFO L93 Difference]: Finished difference Result 572 states and 889 transitions. [2022-12-13 19:54:37,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 19:54:37,882 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) Word has length 50 [2022-12-13 19:54:37,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:37,886 INFO L225 Difference]: With dead ends: 572 [2022-12-13 19:54:37,887 INFO L226 Difference]: Without dead ends: 553 [2022-12-13 19:54:37,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 19:54:37,888 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 243 mSDsluCounter, 1895 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:37,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 2078 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 19:54:37,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-12-13 19:54:37,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 298. [2022-12-13 19:54:37,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 233 states have (on average 1.2832618025751072) internal successors, (299), 244 states have internal predecessors, (299), 43 states have call successors, (43), 10 states have call predecessors, (43), 21 states have return successors, (112), 43 states have call predecessors, (112), 42 states have call successors, (112) [2022-12-13 19:54:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 454 transitions. [2022-12-13 19:54:37,913 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 454 transitions. Word has length 50 [2022-12-13 19:54:37,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:37,913 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 454 transitions. [2022-12-13 19:54:37,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-13 19:54:37,913 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 454 transitions. [2022-12-13 19:54:37,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-13 19:54:37,914 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:37,914 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1] [2022-12-13 19:54:37,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 19:54:38,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 19:54:38,115 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:38,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:38,115 INFO L85 PathProgramCache]: Analyzing trace with hash -2061582742, now seen corresponding path program 1 times [2022-12-13 19:54:38,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:38,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891787469] [2022-12-13 19:54:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:38,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:38,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:38,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:38,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-12-13 19:54:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 19:54:38,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:38,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891787469] [2022-12-13 19:54:38,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891787469] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:54:38,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:54:38,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 19:54:38,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505482927] [2022-12-13 19:54:38,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:54:38,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 19:54:38,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:38,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 19:54:38,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-13 19:54:38,183 INFO L87 Difference]: Start difference. First operand 298 states and 454 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 19:54:38,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:38,317 INFO L93 Difference]: Finished difference Result 438 states and 659 transitions. [2022-12-13 19:54:38,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:54:38,317 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2022-12-13 19:54:38,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:38,318 INFO L225 Difference]: With dead ends: 438 [2022-12-13 19:54:38,318 INFO L226 Difference]: Without dead ends: 320 [2022-12-13 19:54:38,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:54:38,319 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 158 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:38,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 1310 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:54:38,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-12-13 19:54:38,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 298. [2022-12-13 19:54:38,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 233 states have (on average 1.2789699570815452) internal successors, (298), 244 states have internal predecessors, (298), 43 states have call successors, (43), 10 states have call predecessors, (43), 21 states have return successors, (112), 43 states have call predecessors, (112), 42 states have call successors, (112) [2022-12-13 19:54:38,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 453 transitions. [2022-12-13 19:54:38,343 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 453 transitions. Word has length 49 [2022-12-13 19:54:38,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:38,344 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 453 transitions. [2022-12-13 19:54:38,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 19:54:38,344 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 453 transitions. [2022-12-13 19:54:38,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-13 19:54:38,344 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:38,345 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1] [2022-12-13 19:54:38,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 19:54:38,345 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:38,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:38,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1646578540, now seen corresponding path program 1 times [2022-12-13 19:54:38,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:38,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163983319] [2022-12-13 19:54:38,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:38,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:38,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:38,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:38,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:38,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-12-13 19:54:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 19:54:38,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:38,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163983319] [2022-12-13 19:54:38,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163983319] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:54:38,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159200223] [2022-12-13 19:54:38,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:38,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:38,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:54:38,413 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:54:38,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 19:54:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:38,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 19:54:38,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 19:54:38,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:54:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 19:54:38,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159200223] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:54:38,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:54:38,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-13 19:54:38,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208321788] [2022-12-13 19:54:38,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:54:38,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 19:54:38,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:38,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 19:54:38,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-12-13 19:54:38,566 INFO L87 Difference]: Start difference. First operand 298 states and 453 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-13 19:54:38,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:38,707 INFO L93 Difference]: Finished difference Result 609 states and 887 transitions. [2022-12-13 19:54:38,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:54:38,707 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 49 [2022-12-13 19:54:38,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:38,709 INFO L225 Difference]: With dead ends: 609 [2022-12-13 19:54:38,709 INFO L226 Difference]: Without dead ends: 469 [2022-12-13 19:54:38,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-12-13 19:54:38,710 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 223 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:38,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 1575 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:54:38,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-12-13 19:54:38,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 419. [2022-12-13 19:54:38,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 336 states have (on average 1.2886904761904763) internal successors, (433), 352 states have internal predecessors, (433), 53 states have call successors, (53), 13 states have call predecessors, (53), 29 states have return successors, (119), 53 states have call predecessors, (119), 52 states have call successors, (119) [2022-12-13 19:54:38,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 605 transitions. [2022-12-13 19:54:38,758 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 605 transitions. Word has length 49 [2022-12-13 19:54:38,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:38,758 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 605 transitions. [2022-12-13 19:54:38,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-13 19:54:38,759 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 605 transitions. [2022-12-13 19:54:38,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-13 19:54:38,760 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:38,760 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1] [2022-12-13 19:54:38,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 19:54:38,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 19:54:38,961 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:38,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:38,961 INFO L85 PathProgramCache]: Analyzing trace with hash 837231914, now seen corresponding path program 1 times [2022-12-13 19:54:38,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:38,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722358769] [2022-12-13 19:54:38,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:38,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:39,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:39,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:39,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-12-13 19:54:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 19:54:39,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:39,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722358769] [2022-12-13 19:54:39,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722358769] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:54:39,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:54:39,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-12-13 19:54:39,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764092447] [2022-12-13 19:54:39,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:54:39,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 19:54:39,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:39,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 19:54:39,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-13 19:54:39,222 INFO L87 Difference]: Start difference. First operand 419 states and 605 transitions. Second operand has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 19:54:39,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:39,553 INFO L93 Difference]: Finished difference Result 578 states and 831 transitions. [2022-12-13 19:54:39,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 19:54:39,553 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-12-13 19:54:39,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:39,556 INFO L225 Difference]: With dead ends: 578 [2022-12-13 19:54:39,556 INFO L226 Difference]: Without dead ends: 456 [2022-12-13 19:54:39,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-12-13 19:54:39,557 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 135 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1677 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:39,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1677 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 19:54:39,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-12-13 19:54:39,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 431. [2022-12-13 19:54:39,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 347 states have (on average 1.282420749279539) internal successors, (445), 361 states have internal predecessors, (445), 54 states have call successors, (54), 15 states have call predecessors, (54), 29 states have return successors, (113), 54 states have call predecessors, (113), 53 states have call successors, (113) [2022-12-13 19:54:39,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 612 transitions. [2022-12-13 19:54:39,592 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 612 transitions. Word has length 49 [2022-12-13 19:54:39,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:39,592 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 612 transitions. [2022-12-13 19:54:39,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 19:54:39,592 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 612 transitions. [2022-12-13 19:54:39,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-13 19:54:39,593 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:39,594 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1] [2022-12-13 19:54:39,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 19:54:39,594 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:39,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:39,594 INFO L85 PathProgramCache]: Analyzing trace with hash 584790902, now seen corresponding path program 1 times [2022-12-13 19:54:39,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:39,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747282438] [2022-12-13 19:54:39,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:39,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:39,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:39,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:39,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 19:54:39,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:39,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 19:54:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:39,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-12-13 19:54:39,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 19:54:39,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:39,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747282438] [2022-12-13 19:54:39,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747282438] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:54:39,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380256351] [2022-12-13 19:54:39,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:39,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:39,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:54:39,813 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:54:39,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 19:54:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:39,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 19:54:39,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:39,927 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 19:54:39,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:54:40,203 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 19:54:40,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380256351] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:54:40,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:54:40,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-12-13 19:54:40,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128687180] [2022-12-13 19:54:40,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:54:40,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 19:54:40,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:40,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 19:54:40,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2022-12-13 19:54:40,206 INFO L87 Difference]: Start difference. First operand 431 states and 612 transitions. Second operand has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-13 19:54:40,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:40,891 INFO L93 Difference]: Finished difference Result 535 states and 785 transitions. [2022-12-13 19:54:40,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 19:54:40,891 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2022-12-13 19:54:40,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:40,893 INFO L225 Difference]: With dead ends: 535 [2022-12-13 19:54:40,893 INFO L226 Difference]: Without dead ends: 503 [2022-12-13 19:54:40,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 19:54:40,894 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 276 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 1763 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:40,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 1763 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 19:54:40,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-12-13 19:54:40,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 422. [2022-12-13 19:54:40,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 340 states have (on average 1.2882352941176471) internal successors, (438), 354 states have internal predecessors, (438), 53 states have call successors, (53), 13 states have call predecessors, (53), 28 states have return successors, (110), 54 states have call predecessors, (110), 52 states have call successors, (110) [2022-12-13 19:54:40,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 601 transitions. [2022-12-13 19:54:40,925 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 601 transitions. Word has length 53 [2022-12-13 19:54:40,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:40,926 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 601 transitions. [2022-12-13 19:54:40,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-13 19:54:40,926 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 601 transitions. [2022-12-13 19:54:40,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-13 19:54:40,926 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:40,926 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1] [2022-12-13 19:54:40,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 19:54:41,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:41,128 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:41,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:41,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1202108924, now seen corresponding path program 2 times [2022-12-13 19:54:41,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:41,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687766054] [2022-12-13 19:54:41,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:41,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:41,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:41,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:41,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 19:54:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:41,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 19:54:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:41,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-12-13 19:54:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:41,368 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 19:54:41,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:41,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687766054] [2022-12-13 19:54:41,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687766054] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:54:41,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198852679] [2022-12-13 19:54:41,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:54:41,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:41,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:54:41,370 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:54:41,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 19:54:41,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:54:41,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:54:41,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 19:54:41,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:41,491 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 19:54:41,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:54:41,748 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 19:54:41,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198852679] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:54:41,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:54:41,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-12-13 19:54:41,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663408458] [2022-12-13 19:54:41,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:54:41,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 19:54:41,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:41,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 19:54:41,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2022-12-13 19:54:41,749 INFO L87 Difference]: Start difference. First operand 422 states and 601 transitions. Second operand has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-13 19:54:42,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:42,415 INFO L93 Difference]: Finished difference Result 523 states and 761 transitions. [2022-12-13 19:54:42,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 19:54:42,415 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2022-12-13 19:54:42,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:42,417 INFO L225 Difference]: With dead ends: 523 [2022-12-13 19:54:42,417 INFO L226 Difference]: Without dead ends: 503 [2022-12-13 19:54:42,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 19:54:42,418 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 295 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:42,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 1662 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 19:54:42,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-12-13 19:54:42,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 368. [2022-12-13 19:54:42,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 298 states have (on average 1.2852348993288591) internal successors, (383), 310 states have internal predecessors, (383), 43 states have call successors, (43), 13 states have call predecessors, (43), 26 states have return successors, (83), 44 states have call predecessors, (83), 42 states have call successors, (83) [2022-12-13 19:54:42,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 509 transitions. [2022-12-13 19:54:42,450 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 509 transitions. Word has length 53 [2022-12-13 19:54:42,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:42,450 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 509 transitions. [2022-12-13 19:54:42,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 21 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-13 19:54:42,451 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 509 transitions. [2022-12-13 19:54:42,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 19:54:42,451 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:42,451 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:54:42,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 19:54:42,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:42,652 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:42,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:42,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1485657907, now seen corresponding path program 1 times [2022-12-13 19:54:42,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:42,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828514093] [2022-12-13 19:54:42,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:42,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:42,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:42,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:42,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 19:54:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 19:54:42,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:42,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828514093] [2022-12-13 19:54:42,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828514093] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:54:42,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466545457] [2022-12-13 19:54:42,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:42,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:42,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:54:42,795 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:54:42,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 19:54:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:42,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:54:42,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 19:54:42,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:54:42,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466545457] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:54:42,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:54:42,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-12-13 19:54:42,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30172580] [2022-12-13 19:54:42,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:54:42,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:54:42,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:42,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:54:42,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:54:42,860 INFO L87 Difference]: Start difference. First operand 368 states and 509 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 19:54:42,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:42,918 INFO L93 Difference]: Finished difference Result 534 states and 777 transitions. [2022-12-13 19:54:42,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:54:42,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-12-13 19:54:42,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:42,920 INFO L225 Difference]: With dead ends: 534 [2022-12-13 19:54:42,920 INFO L226 Difference]: Without dead ends: 384 [2022-12-13 19:54:42,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:54:42,922 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 2 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:42,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 293 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:54:42,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-12-13 19:54:42,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 376. [2022-12-13 19:54:42,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 306 states have (on average 1.2777777777777777) internal successors, (391), 318 states have internal predecessors, (391), 43 states have call successors, (43), 13 states have call predecessors, (43), 26 states have return successors, (83), 44 states have call predecessors, (83), 42 states have call successors, (83) [2022-12-13 19:54:42,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 517 transitions. [2022-12-13 19:54:42,952 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 517 transitions. Word has length 52 [2022-12-13 19:54:42,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:42,953 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 517 transitions. [2022-12-13 19:54:42,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 19:54:42,953 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 517 transitions. [2022-12-13 19:54:42,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 19:54:42,953 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:42,953 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:54:42,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 19:54:43,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:43,154 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:43,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:43,154 INFO L85 PathProgramCache]: Analyzing trace with hash 676311281, now seen corresponding path program 1 times [2022-12-13 19:54:43,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:43,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031879277] [2022-12-13 19:54:43,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:43,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:43,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:43,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:43,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 19:54:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 19:54:43,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:43,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031879277] [2022-12-13 19:54:43,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031879277] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:54:43,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057023387] [2022-12-13 19:54:43,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:43,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:43,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:54:43,521 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:54:43,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 19:54:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:43,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 19:54:43,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 19:54:45,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:54:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 19:54:46,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057023387] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:54:46,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:54:46,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 48 [2022-12-13 19:54:46,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965035527] [2022-12-13 19:54:46,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:54:46,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 19:54:46,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:46,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 19:54:46,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2110, Unknown=0, NotChecked=0, Total=2256 [2022-12-13 19:54:46,732 INFO L87 Difference]: Start difference. First operand 376 states and 517 transitions. Second operand has 48 states, 42 states have (on average 2.119047619047619) internal successors, (89), 37 states have internal predecessors, (89), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-13 19:54:49,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:49,695 INFO L93 Difference]: Finished difference Result 602 states and 851 transitions. [2022-12-13 19:54:49,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 19:54:49,695 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 42 states have (on average 2.119047619047619) internal successors, (89), 37 states have internal predecessors, (89), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 52 [2022-12-13 19:54:49,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:49,697 INFO L225 Difference]: With dead ends: 602 [2022-12-13 19:54:49,697 INFO L226 Difference]: Without dead ends: 501 [2022-12-13 19:54:49,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=372, Invalid=4884, Unknown=0, NotChecked=0, Total=5256 [2022-12-13 19:54:49,699 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 369 mSDsluCounter, 4362 mSDsCounter, 0 mSdLazyCounter, 2160 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 4536 SdHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:49,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 4536 Invalid, 2245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2160 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-13 19:54:49,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-12-13 19:54:49,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 432. [2022-12-13 19:54:49,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 352 states have (on average 1.2784090909090908) internal successors, (450), 367 states have internal predecessors, (450), 48 states have call successors, (48), 15 states have call predecessors, (48), 31 states have return successors, (97), 49 states have call predecessors, (97), 47 states have call successors, (97) [2022-12-13 19:54:49,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 595 transitions. [2022-12-13 19:54:49,747 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 595 transitions. Word has length 52 [2022-12-13 19:54:49,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:49,747 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 595 transitions. [2022-12-13 19:54:49,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 42 states have (on average 2.119047619047619) internal successors, (89), 37 states have internal predecessors, (89), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-13 19:54:49,748 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 595 transitions. [2022-12-13 19:54:49,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-13 19:54:49,748 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:49,748 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:54:49,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 19:54:49,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 19:54:49,949 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:49,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:49,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1341445802, now seen corresponding path program 1 times [2022-12-13 19:54:49,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:49,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133327598] [2022-12-13 19:54:49,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:49,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:50,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:50,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:50,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-12-13 19:54:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:50,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-12-13 19:54:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 19:54:50,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:50,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133327598] [2022-12-13 19:54:50,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133327598] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:54:50,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:54:50,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 19:54:50,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183672306] [2022-12-13 19:54:50,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:54:50,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 19:54:50,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:50,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 19:54:50,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-13 19:54:50,059 INFO L87 Difference]: Start difference. First operand 432 states and 595 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 19:54:50,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:50,166 INFO L93 Difference]: Finished difference Result 447 states and 610 transitions. [2022-12-13 19:54:50,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:54:50,166 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-12-13 19:54:50,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:50,167 INFO L225 Difference]: With dead ends: 447 [2022-12-13 19:54:50,167 INFO L226 Difference]: Without dead ends: 363 [2022-12-13 19:54:50,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:54:50,168 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 8 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:50,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 752 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:54:50,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-12-13 19:54:50,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2022-12-13 19:54:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 295 states have (on average 1.2881355932203389) internal successors, (380), 308 states have internal predecessors, (380), 41 states have call successors, (41), 12 states have call predecessors, (41), 26 states have return successors, (83), 42 states have call predecessors, (83), 40 states have call successors, (83) [2022-12-13 19:54:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 504 transitions. [2022-12-13 19:54:50,213 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 504 transitions. Word has length 53 [2022-12-13 19:54:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:50,213 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 504 transitions. [2022-12-13 19:54:50,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 19:54:50,213 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 504 transitions. [2022-12-13 19:54:50,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 19:54:50,214 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:50,214 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:54:50,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 19:54:50,214 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:50,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:50,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1795058933, now seen corresponding path program 1 times [2022-12-13 19:54:50,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:50,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481673140] [2022-12-13 19:54:50,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:50,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:50,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:50,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:50,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-12-13 19:54:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 19:54:50,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:50,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481673140] [2022-12-13 19:54:50,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481673140] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:54:50,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:54:50,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:54:50,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004676523] [2022-12-13 19:54:50,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:54:50,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:54:50,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:50,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:54:50,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:54:50,278 INFO L87 Difference]: Start difference. First operand 363 states and 504 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 19:54:50,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:50,350 INFO L93 Difference]: Finished difference Result 526 states and 760 transitions. [2022-12-13 19:54:50,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:54:50,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-12-13 19:54:50,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:50,352 INFO L225 Difference]: With dead ends: 526 [2022-12-13 19:54:50,352 INFO L226 Difference]: Without dead ends: 383 [2022-12-13 19:54:50,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:54:50,354 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 1 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:50,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 279 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:54:50,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-12-13 19:54:50,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 369. [2022-12-13 19:54:50,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 301 states have (on average 1.282392026578073) internal successors, (386), 314 states have internal predecessors, (386), 41 states have call successors, (41), 12 states have call predecessors, (41), 26 states have return successors, (83), 42 states have call predecessors, (83), 40 states have call successors, (83) [2022-12-13 19:54:50,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 510 transitions. [2022-12-13 19:54:50,396 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 510 transitions. Word has length 52 [2022-12-13 19:54:50,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:50,396 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 510 transitions. [2022-12-13 19:54:50,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 19:54:50,396 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 510 transitions. [2022-12-13 19:54:50,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 19:54:50,397 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:50,397 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:54:50,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 19:54:50,397 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:50,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:50,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1208252919, now seen corresponding path program 2 times [2022-12-13 19:54:50,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:50,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890557599] [2022-12-13 19:54:50,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:50,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:50,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:50,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:50,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-12-13 19:54:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 19:54:50,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:50,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890557599] [2022-12-13 19:54:50,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890557599] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:54:50,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081099296] [2022-12-13 19:54:50,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:54:50,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:50,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:54:50,488 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:54:50,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 19:54:50,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:54:50,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:54:50,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 19:54:50,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 19:54:50,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:54:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 19:54:50,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081099296] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:54:50,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:54:50,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 15 [2022-12-13 19:54:50,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7996221] [2022-12-13 19:54:50,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:54:50,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 19:54:50,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:50,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 19:54:50,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-12-13 19:54:50,745 INFO L87 Difference]: Start difference. First operand 369 states and 510 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-13 19:54:50,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:50,905 INFO L93 Difference]: Finished difference Result 480 states and 654 transitions. [2022-12-13 19:54:50,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 19:54:50,905 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2022-12-13 19:54:50,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:50,908 INFO L225 Difference]: With dead ends: 480 [2022-12-13 19:54:50,908 INFO L226 Difference]: Without dead ends: 374 [2022-12-13 19:54:50,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-12-13 19:54:50,908 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 140 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:50,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 1385 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:54:50,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-12-13 19:54:50,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 358. [2022-12-13 19:54:50,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 290 states have (on average 1.2793103448275862) internal successors, (371), 303 states have internal predecessors, (371), 41 states have call successors, (41), 12 states have call predecessors, (41), 26 states have return successors, (83), 42 states have call predecessors, (83), 40 states have call successors, (83) [2022-12-13 19:54:50,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 495 transitions. [2022-12-13 19:54:50,946 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 495 transitions. Word has length 52 [2022-12-13 19:54:50,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:50,946 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 495 transitions. [2022-12-13 19:54:50,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-13 19:54:50,946 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 495 transitions. [2022-12-13 19:54:50,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 19:54:50,947 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:50,947 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:54:50,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 19:54:51,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 19:54:51,148 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:54:51,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:51,149 INFO L85 PathProgramCache]: Analyzing trace with hash 187184565, now seen corresponding path program 1 times [2022-12-13 19:54:51,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:51,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228966507] [2022-12-13 19:54:51,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:51,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:51,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 19:54:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:51,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 19:54:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:51,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-12-13 19:54:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 19:54:51,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:51,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228966507] [2022-12-13 19:54:51,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228966507] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:54:51,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031698852] [2022-12-13 19:54:51,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:51,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:51,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:54:51,565 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:54:51,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a752cad-a80a-4dd2-9318-f976dbfee7f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 19:54:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:51,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 19:54:51,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 19:54:53,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:55:15,616 WARN L233 SmtUtils]: Spent 18.75s on a formula simplification. DAG size of input: 4489 DAG size of output: 4335 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)