./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/egcd3-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/egcd3-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc --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 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be --- 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-5e519f3 [2022-11-02 20:00:47,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:00:47,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:00:47,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:00:47,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:00:47,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:00:47,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:00:47,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:00:47,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:00:48,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:00:48,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:00:48,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:00:48,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:00:48,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:00:48,015 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:00:48,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:00:48,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:00:48,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:00:48,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:00:48,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:00:48,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:00:48,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:00:48,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:00:48,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:00:48,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:00:48,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:00:48,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:00:48,054 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:00:48,054 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:00:48,056 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:00:48,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:00:48,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:00:48,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:00:48,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:00:48,065 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:00:48,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:00:48,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:00:48,066 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:00:48,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:00:48,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:00:48,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:00:48,070 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:00:48,120 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:00:48,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:00:48,122 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:00:48,122 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:00:48,123 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:00:48,124 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:00:48,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:00:48,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:00:48,125 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:00:48,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:00:48,127 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:00:48,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:00:48,128 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:00:48,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:00:48,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:00:48,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:00:48,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:00:48,129 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:00:48,129 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:00:48,130 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:00:48,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:00:48,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:00:48,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:00:48,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:00:48,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:00:48,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:00:48,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:00:48,132 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:00:48,132 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:00:48,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:00:48,133 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:00:48,133 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:00:48,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:00:48,134 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be [2022-11-02 20:00:48,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:00:48,448 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:00:48,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:00:48,453 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:00:48,453 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:00:48,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/nla-digbench/egcd3-ll.c [2022-11-02 20:00:48,554 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/data/07b9f0de3/e8126108ef4d4e47b75c8aa8543c8a7a/FLAGa72a77dcb [2022-11-02 20:00:49,158 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:00:49,159 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2022-11-02 20:00:49,168 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/data/07b9f0de3/e8126108ef4d4e47b75c8aa8543c8a7a/FLAGa72a77dcb [2022-11-02 20:00:49,556 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/data/07b9f0de3/e8126108ef4d4e47b75c8aa8543c8a7a [2022-11-02 20:00:49,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:00:49,560 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:00:49,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:00:49,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:00:49,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:00:49,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:00:49" (1/1) ... [2022-11-02 20:00:49,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@569e3d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:00:49, skipping insertion in model container [2022-11-02 20:00:49,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:00:49" (1/1) ... [2022-11-02 20:00:49,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:00:49,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:00:49,838 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2022-11-02 20:00:49,887 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:00:49,899 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:00:49,916 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2022-11-02 20:00:49,939 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:00:49,959 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:00:49,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:00:49 WrapperNode [2022-11-02 20:00:49,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:00:49,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:00:49,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:00:49,962 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:00:49,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:00:49" (1/1) ... [2022-11-02 20:00:49,982 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:00:49" (1/1) ... [2022-11-02 20:00:50,006 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 78 [2022-11-02 20:00:50,006 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:00:50,007 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:00:50,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:00:50,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:00:50,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:00:49" (1/1) ... [2022-11-02 20:00:50,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:00:49" (1/1) ... [2022-11-02 20:00:50,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:00:49" (1/1) ... [2022-11-02 20:00:50,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:00:49" (1/1) ... [2022-11-02 20:00:50,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:00:49" (1/1) ... [2022-11-02 20:00:50,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:00:49" (1/1) ... [2022-11-02 20:00:50,046 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:00:49" (1/1) ... [2022-11-02 20:00:50,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:00:49" (1/1) ... [2022-11-02 20:00:50,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:00:50,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:00:50,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:00:50,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:00:50,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:00:49" (1/1) ... [2022-11-02 20:00:50,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:00:50,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:00:50,091 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:00:50,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:00:50,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:00:50,136 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-02 20:00:50,136 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-02 20:00:50,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:00:50,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:00:50,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:00:50,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 20:00:50,137 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 20:00:50,214 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:00:50,217 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:00:50,400 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:00:50,407 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:00:50,408 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-02 20:00:50,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:00:50 BoogieIcfgContainer [2022-11-02 20:00:50,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:00:50,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:00:50,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:00:50,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:00:50,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:00:49" (1/3) ... [2022-11-02 20:00:50,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce607fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:00:50, skipping insertion in model container [2022-11-02 20:00:50,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:00:49" (2/3) ... [2022-11-02 20:00:50,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce607fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:00:50, skipping insertion in model container [2022-11-02 20:00:50,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:00:50" (3/3) ... [2022-11-02 20:00:50,423 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2022-11-02 20:00:50,449 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:00:50,449 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:00:50,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:00:50,547 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;@13da7d27, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:00:50,548 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:00:50,554 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-02 20:00:50,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:00:50,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:00:50,568 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:00:50,569 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:00:50,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:00:50,581 INFO L85 PathProgramCache]: Analyzing trace with hash -149497031, now seen corresponding path program 1 times [2022-11-02 20:00:50,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:00:50,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447593930] [2022-11-02 20:00:50,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:00:50,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:00:50,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:00:50,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:00:50,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447593930] [2022-11-02 20:00:50,779 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:00:50,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915629504] [2022-11-02 20:00:50,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:00:50,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:00:50,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:00:50,784 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:00:50,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:00:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:00:50,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-02 20:00:50,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:00:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:00:50,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:00:50,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915629504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:00:50,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:00:50,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:00:50,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823924545] [2022-11-02 20:00:50,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:00:50,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:00:50,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:00:51,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:00:51,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:00:51,061 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:00:51,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:00:51,107 INFO L93 Difference]: Finished difference Result 61 states and 97 transitions. [2022-11-02 20:00:51,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:00:51,110 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-11-02 20:00:51,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:00:51,133 INFO L225 Difference]: With dead ends: 61 [2022-11-02 20:00:51,133 INFO L226 Difference]: Without dead ends: 28 [2022-11-02 20:00:51,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:00:51,143 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:00:51,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:00:51,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-02 20:00:51,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-02 20:00:51,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:00:51,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-11-02 20:00:51,218 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 18 [2022-11-02 20:00:51,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:00:51,219 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-11-02 20:00:51,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:00:51,220 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-11-02 20:00:51,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-02 20:00:51,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:00:51,223 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:00:51,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:00:51,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:00:51,453 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:00:51,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:00:51,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2030119444, now seen corresponding path program 1 times [2022-11-02 20:00:51,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:00:51,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529900721] [2022-11-02 20:00:51,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:00:51,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:00:51,492 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:00:51,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415559741] [2022-11-02 20:00:51,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:00:51,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:00:51,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:00:51,495 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:00:51,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:00:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:00:51,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:00:51,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:00:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:00:51,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:00:51,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:00:51,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529900721] [2022-11-02 20:00:51,732 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:00:51,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415559741] [2022-11-02 20:00:51,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415559741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:00:51,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:00:51,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:00:51,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86809241] [2022-11-02 20:00:51,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:00:51,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:00:51,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:00:51,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:00:51,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:00:51,753 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:00:51,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:00:51,907 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2022-11-02 20:00:51,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:00:51,909 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-11-02 20:00:51,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:00:51,910 INFO L225 Difference]: With dead ends: 47 [2022-11-02 20:00:51,910 INFO L226 Difference]: Without dead ends: 40 [2022-11-02 20:00:51,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:00:51,913 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 31 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:00:51,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 104 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:00:51,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-02 20:00:51,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2022-11-02 20:00:51,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:00:51,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-11-02 20:00:51,946 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2022-11-02 20:00:51,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:00:51,946 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-11-02 20:00:51,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:00:51,947 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-11-02 20:00:51,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 20:00:51,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:00:51,948 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:00:51,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:00:52,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:00:52,150 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:00:52,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:00:52,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1778657237, now seen corresponding path program 1 times [2022-11-02 20:00:52,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:00:52,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170019235] [2022-11-02 20:00:52,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:00:52,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:00:52,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:00:52,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539700422] [2022-11-02 20:00:52,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:00:52,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:00:52,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:00:52,176 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:00:52,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:00:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:00:52,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:00:52,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:00:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:00:52,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:00:52,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:00:52,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170019235] [2022-11-02 20:00:52,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:00:52,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539700422] [2022-11-02 20:00:52,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539700422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:00:52,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:00:52,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:00:52,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575852756] [2022-11-02 20:00:52,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:00:52,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:00:52,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:00:52,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:00:52,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:00:52,502 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:00:52,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:00:52,697 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-11-02 20:00:52,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:00:52,698 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-11-02 20:00:52,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:00:52,705 INFO L225 Difference]: With dead ends: 46 [2022-11-02 20:00:52,705 INFO L226 Difference]: Without dead ends: 44 [2022-11-02 20:00:52,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:00:52,712 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 53 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:00:52,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 140 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:00:52,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-02 20:00:52,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-11-02 20:00:52,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-02 20:00:52,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2022-11-02 20:00:52,735 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2022-11-02 20:00:52,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:00:52,736 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2022-11-02 20:00:52,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:00:52,737 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2022-11-02 20:00:52,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-02 20:00:52,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:00:52,739 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:00:52,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-02 20:00:52,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:00:52,956 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:00:52,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:00:52,957 INFO L85 PathProgramCache]: Analyzing trace with hash 646289443, now seen corresponding path program 1 times [2022-11-02 20:00:52,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:00:52,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942980932] [2022-11-02 20:00:52,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:00:52,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:00:52,995 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:00:53,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990369389] [2022-11-02 20:00:53,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:00:53,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:00:53,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:00:53,011 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:00:53,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:00:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:00:53,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:00:53,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:00:53,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:00:53,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:00:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:00:53,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:00:53,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942980932] [2022-11-02 20:00:53,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:00:53,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990369389] [2022-11-02 20:00:53,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990369389] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:00:53,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:00:53,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-02 20:00:53,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061350743] [2022-11-02 20:00:53,362 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:00:53,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:00:53,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:00:53,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:00:53,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:00:53,364 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:00:53,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:00:53,703 INFO L93 Difference]: Finished difference Result 96 states and 134 transitions. [2022-11-02 20:00:53,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:00:53,704 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-11-02 20:00:53,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:00:53,705 INFO L225 Difference]: With dead ends: 96 [2022-11-02 20:00:53,706 INFO L226 Difference]: Without dead ends: 89 [2022-11-02 20:00:53,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:00:53,707 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 58 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:00:53,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 193 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:00:53,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-02 20:00:53,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2022-11-02 20:00:53,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 46 states have internal predecessors, (57), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-02 20:00:53,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2022-11-02 20:00:53,732 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 24 [2022-11-02 20:00:53,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:00:53,732 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2022-11-02 20:00:53,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:00:53,733 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2022-11-02 20:00:53,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:00:53,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:00:53,734 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:00:53,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:00:53,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:00:53,949 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:00:53,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:00:53,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1194834104, now seen corresponding path program 1 times [2022-11-02 20:00:53,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:00:53,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090935794] [2022-11-02 20:00:53,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:00:53,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:00:53,981 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:00:53,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529860940] [2022-11-02 20:00:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:00:53,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:00:53,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:00:53,988 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:00:53,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:00:54,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:00:54,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:00:54,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:00:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:00:54,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:00:54,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:00:54,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090935794] [2022-11-02 20:00:54,194 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:00:54,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529860940] [2022-11-02 20:00:54,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529860940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:00:54,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:00:54,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:00:54,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924238538] [2022-11-02 20:00:54,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:00:54,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:00:54,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:00:54,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:00:54,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:00:54,197 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:00:54,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:00:54,356 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-11-02 20:00:54,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:00:54,357 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-11-02 20:00:54,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:00:54,358 INFO L225 Difference]: With dead ends: 72 [2022-11-02 20:00:54,359 INFO L226 Difference]: Without dead ends: 70 [2022-11-02 20:00:54,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:00:54,360 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 32 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:00:54,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 137 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:00:54,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-02 20:00:54,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2022-11-02 20:00:54,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.25) internal successors, (60), 49 states have internal predecessors, (60), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-02 20:00:54,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 89 transitions. [2022-11-02 20:00:54,381 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 89 transitions. Word has length 27 [2022-11-02 20:00:54,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:00:54,381 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 89 transitions. [2022-11-02 20:00:54,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:00:54,382 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 89 transitions. [2022-11-02 20:00:54,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:00:54,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:00:54,383 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:00:54,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:00:54,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:00:54,612 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:00:54,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:00:54,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1392040386, now seen corresponding path program 1 times [2022-11-02 20:00:54,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:00:54,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143614007] [2022-11-02 20:00:54,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:00:54,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:00:54,639 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:00:54,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200749854] [2022-11-02 20:00:54,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:00:54,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:00:54,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:00:54,661 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:00:54,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:00:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:00:54,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:00:54,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:00:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:00:54,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:00:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:00:55,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:00:55,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143614007] [2022-11-02 20:00:55,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:00:55,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200749854] [2022-11-02 20:00:55,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200749854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:00:55,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:00:55,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-11-02 20:00:55,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026694176] [2022-11-02 20:00:55,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:00:55,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:00:55,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:00:55,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:00:55,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:00:55,138 INFO L87 Difference]: Start difference. First operand 68 states and 89 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:00:55,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:00:55,466 INFO L93 Difference]: Finished difference Result 104 states and 138 transitions. [2022-11-02 20:00:55,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:00:55,467 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-11-02 20:00:55,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:00:55,473 INFO L225 Difference]: With dead ends: 104 [2022-11-02 20:00:55,473 INFO L226 Difference]: Without dead ends: 102 [2022-11-02 20:00:55,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:00:55,477 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 52 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:00:55,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 212 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:00:55,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-02 20:00:55,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2022-11-02 20:00:55,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 70 states have internal predecessors, (87), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-02 20:00:55,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 132 transitions. [2022-11-02 20:00:55,529 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 132 transitions. Word has length 27 [2022-11-02 20:00:55,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:00:55,529 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 132 transitions. [2022-11-02 20:00:55,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:00:55,530 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 132 transitions. [2022-11-02 20:00:55,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 20:00:55,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:00:55,540 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:00:55,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:00:55,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:00:55,760 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:00:55,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:00:55,761 INFO L85 PathProgramCache]: Analyzing trace with hash -281586315, now seen corresponding path program 1 times [2022-11-02 20:00:55,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:00:55,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456556157] [2022-11-02 20:00:55,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:00:55,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:00:55,778 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:00:55,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134448420] [2022-11-02 20:00:55,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:00:55,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:00:55,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:00:55,781 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:00:55,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:00:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:00:55,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:00:55,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:00:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 20:00:55,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:00:55,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:00:55,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456556157] [2022-11-02 20:00:55,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:00:55,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134448420] [2022-11-02 20:00:55,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134448420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:00:55,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:00:55,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:00:55,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464300281] [2022-11-02 20:00:55,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:00:55,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:00:55,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:00:55,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:00:55,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:00:55,922 INFO L87 Difference]: Start difference. First operand 98 states and 132 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:00:56,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:00:56,024 INFO L93 Difference]: Finished difference Result 144 states and 204 transitions. [2022-11-02 20:00:56,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:00:56,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-11-02 20:00:56,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:00:56,029 INFO L225 Difference]: With dead ends: 144 [2022-11-02 20:00:56,029 INFO L226 Difference]: Without dead ends: 142 [2022-11-02 20:00:56,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:00:56,031 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:00:56,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 110 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:00:56,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-02 20:00:56,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2022-11-02 20:00:56,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 87 states have internal predecessors, (111), 43 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-11-02 20:00:56,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 196 transitions. [2022-11-02 20:00:56,071 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 196 transitions. Word has length 32 [2022-11-02 20:00:56,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:00:56,071 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 196 transitions. [2022-11-02 20:00:56,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:00:56,072 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 196 transitions. [2022-11-02 20:00:56,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 20:00:56,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:00:56,073 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:00:56,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:00:56,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:00:56,297 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:00:56,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:00:56,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1215278097, now seen corresponding path program 1 times [2022-11-02 20:00:56,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:00:56,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324804290] [2022-11-02 20:00:56,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:00:56,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:00:56,312 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:00:56,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474322571] [2022-11-02 20:00:56,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:00:56,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:00:56,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:00:56,315 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:00:56,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:00:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:00:56,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-02 20:00:56,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:00:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:00:56,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:00:57,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:00:57,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:00:57,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324804290] [2022-11-02 20:00:57,216 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:00:57,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474322571] [2022-11-02 20:00:57,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474322571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:00:57,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:00:57,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2022-11-02 20:00:57,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835747767] [2022-11-02 20:00:57,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:00:57,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:00:57,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:00:57,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:00:57,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:00:57,223 INFO L87 Difference]: Start difference. First operand 136 states and 196 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:01:08,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:01:08,656 INFO L93 Difference]: Finished difference Result 258 states and 380 transitions. [2022-11-02 20:01:08,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:01:08,657 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 32 [2022-11-02 20:01:08,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:01:08,660 INFO L225 Difference]: With dead ends: 258 [2022-11-02 20:01:08,660 INFO L226 Difference]: Without dead ends: 256 [2022-11-02 20:01:08,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:01:08,662 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 197 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:01:08,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 235 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-02 20:01:08,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-11-02 20:01:08,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 204. [2022-11-02 20:01:08,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 136 states have (on average 1.2941176470588236) internal successors, (176), 137 states have internal predecessors, (176), 59 states have call successors, (59), 8 states have call predecessors, (59), 8 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-11-02 20:01:08,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 293 transitions. [2022-11-02 20:01:08,769 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 293 transitions. Word has length 32 [2022-11-02 20:01:08,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:01:08,769 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 293 transitions. [2022-11-02 20:01:08,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:01:08,770 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 293 transitions. [2022-11-02 20:01:08,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 20:01:08,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:01:08,771 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] [2022-11-02 20:01:08,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:01:08,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 20:01:08,988 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:01:08,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:01:08,988 INFO L85 PathProgramCache]: Analyzing trace with hash 492814709, now seen corresponding path program 2 times [2022-11-02 20:01:08,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:01:08,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605587088] [2022-11-02 20:01:08,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:01:08,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:01:09,008 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:01:09,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816809695] [2022-11-02 20:01:09,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:01:09,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:01:09,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:01:09,019 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:01:09,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:01:09,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:01:09,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:01:09,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:01:09,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:01:09,135 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:01:09,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:01:09,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:01:09,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605587088] [2022-11-02 20:01:09,137 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:01:09,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816809695] [2022-11-02 20:01:09,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816809695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:01:09,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:01:09,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:01:09,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024185101] [2022-11-02 20:01:09,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:01:09,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:01:09,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:01:09,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:01:09,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:01:09,144 INFO L87 Difference]: Start difference. First operand 204 states and 293 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:01:09,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:01:09,374 INFO L93 Difference]: Finished difference Result 247 states and 348 transitions. [2022-11-02 20:01:09,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:01:09,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-11-02 20:01:09,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:01:09,376 INFO L225 Difference]: With dead ends: 247 [2022-11-02 20:01:09,376 INFO L226 Difference]: Without dead ends: 127 [2022-11-02 20:01:09,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:01:09,386 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 18 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:01:09,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 119 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:01:09,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-02 20:01:09,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2022-11-02 20:01:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 76 states have internal predecessors, (91), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-02 20:01:09,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2022-11-02 20:01:09,447 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 32 [2022-11-02 20:01:09,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:01:09,448 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2022-11-02 20:01:09,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:01:09,449 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2022-11-02 20:01:09,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 20:01:09,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:01:09,454 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-02 20:01:09,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:01:09,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:01:09,668 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:01:09,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:01:09,668 INFO L85 PathProgramCache]: Analyzing trace with hash -449167720, now seen corresponding path program 1 times [2022-11-02 20:01:09,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:01:09,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024444454] [2022-11-02 20:01:09,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:01:09,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:01:09,687 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:01:09,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939450190] [2022-11-02 20:01:09,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:01:09,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:01:09,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:01:09,705 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:01:09,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:01:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:01:09,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:01:09,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:01:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 20:01:09,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:01:09,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:01:09,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024444454] [2022-11-02 20:01:09,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:01:09,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939450190] [2022-11-02 20:01:09,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939450190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:01:09,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:01:09,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:01:09,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22403811] [2022-11-02 20:01:09,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:01:09,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:01:09,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:01:09,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:01:09,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:01:09,842 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:01:10,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:01:10,010 INFO L93 Difference]: Finished difference Result 187 states and 271 transitions. [2022-11-02 20:01:10,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:01:10,010 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-11-02 20:01:10,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:01:10,012 INFO L225 Difference]: With dead ends: 187 [2022-11-02 20:01:10,012 INFO L226 Difference]: Without dead ends: 185 [2022-11-02 20:01:10,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:01:10,013 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:01:10,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 120 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:01:10,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-02 20:01:10,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 163. [2022-11-02 20:01:10,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 86 states have (on average 1.186046511627907) internal successors, (102), 95 states have internal predecessors, (102), 67 states have call successors, (67), 9 states have call predecessors, (67), 9 states have return successors, (66), 58 states have call predecessors, (66), 66 states have call successors, (66) [2022-11-02 20:01:10,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 235 transitions. [2022-11-02 20:01:10,144 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 235 transitions. Word has length 37 [2022-11-02 20:01:10,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:01:10,145 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 235 transitions. [2022-11-02 20:01:10,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:01:10,145 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 235 transitions. [2022-11-02 20:01:10,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-02 20:01:10,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:01:10,148 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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] [2022-11-02 20:01:10,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:01:10,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:01:10,364 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:01:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:01:10,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1289603446, now seen corresponding path program 1 times [2022-11-02 20:01:10,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:01:10,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198615289] [2022-11-02 20:01:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:01:10,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:01:10,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:01:10,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1273614488] [2022-11-02 20:01:10,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:01:10,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:01:10,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:01:10,380 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:01:10,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:01:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:01:10,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-02 20:01:10,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:01:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 20:01:11,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:01:12,258 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 20:01:12,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:01:12,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198615289] [2022-11-02 20:01:12,259 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:01:12,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273614488] [2022-11-02 20:01:12,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273614488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:01:12,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:01:12,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-11-02 20:01:12,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541370663] [2022-11-02 20:01:12,260 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:01:12,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:01:12,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:01:12,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:01:12,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:01:12,262 INFO L87 Difference]: Start difference. First operand 163 states and 235 transitions. Second operand has 21 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 19 states have internal predecessors, (42), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-02 20:01:22,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:01:22,482 INFO L93 Difference]: Finished difference Result 301 states and 449 transitions. [2022-11-02 20:01:22,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-02 20:01:22,486 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 19 states have internal predecessors, (42), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) Word has length 49 [2022-11-02 20:01:22,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:01:22,489 INFO L225 Difference]: With dead ends: 301 [2022-11-02 20:01:22,490 INFO L226 Difference]: Without dead ends: 297 [2022-11-02 20:01:22,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-11-02 20:01:22,492 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 113 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:01:22,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 214 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-11-02 20:01:22,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-02 20:01:22,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 245. [2022-11-02 20:01:22,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 141 states have (on average 1.2198581560283688) internal successors, (172), 148 states have internal predecessors, (172), 91 states have call successors, (91), 12 states have call predecessors, (91), 12 states have return successors, (90), 84 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-02 20:01:22,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 353 transitions. [2022-11-02 20:01:22,701 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 353 transitions. Word has length 49 [2022-11-02 20:01:22,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:01:22,701 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 353 transitions. [2022-11-02 20:01:22,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 19 states have internal predecessors, (42), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-02 20:01:22,702 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 353 transitions. [2022-11-02 20:01:22,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-02 20:01:22,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:01:22,704 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:01:22,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:01:22,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:01:22,922 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:01:22,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:01:22,922 INFO L85 PathProgramCache]: Analyzing trace with hash 982010905, now seen corresponding path program 1 times [2022-11-02 20:01:22,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:01:22,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918215087] [2022-11-02 20:01:22,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:01:22,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:01:22,932 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:01:22,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288389358] [2022-11-02 20:01:22,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:01:22,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:01:22,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:01:22,935 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:01:22,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:01:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:01:23,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:01:23,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:01:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-02 20:01:23,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:01:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-02 20:01:23,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:01:23,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918215087] [2022-11-02 20:01:23,450 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:01:23,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288389358] [2022-11-02 20:01:23,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288389358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:01:23,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:01:23,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 15 [2022-11-02 20:01:23,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604442664] [2022-11-02 20:01:23,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:01:23,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:01:23,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:01:23,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:01:23,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:01:23,454 INFO L87 Difference]: Start difference. First operand 245 states and 353 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-02 20:01:24,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:01:24,176 INFO L93 Difference]: Finished difference Result 287 states and 415 transitions. [2022-11-02 20:01:24,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:01:24,176 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 59 [2022-11-02 20:01:24,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:01:24,180 INFO L225 Difference]: With dead ends: 287 [2022-11-02 20:01:24,180 INFO L226 Difference]: Without dead ends: 285 [2022-11-02 20:01:24,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:01:24,181 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 54 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:01:24,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 137 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:01:24,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-02 20:01:24,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 249. [2022-11-02 20:01:24,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 144 states have (on average 1.2152777777777777) internal successors, (175), 151 states have internal predecessors, (175), 91 states have call successors, (91), 13 states have call predecessors, (91), 13 states have return successors, (90), 84 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-02 20:01:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 356 transitions. [2022-11-02 20:01:24,388 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 356 transitions. Word has length 59 [2022-11-02 20:01:24,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:01:24,388 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 356 transitions. [2022-11-02 20:01:24,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-02 20:01:24,389 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 356 transitions. [2022-11-02 20:01:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-02 20:01:24,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:01:24,390 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:01:24,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:01:24,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:01:24,616 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:01:24,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:01:24,616 INFO L85 PathProgramCache]: Analyzing trace with hash -70799180, now seen corresponding path program 1 times [2022-11-02 20:01:24,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:01:24,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107658571] [2022-11-02 20:01:24,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:01:24,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:01:24,633 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:01:24,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243535393] [2022-11-02 20:01:24,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:01:24,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:01:24,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:01:24,639 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:01:24,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:01:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:01:24,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-02 20:01:24,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:01:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-02 20:01:24,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:01:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-02 20:01:25,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:01:25,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107658571] [2022-11-02 20:01:25,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:01:25,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243535393] [2022-11-02 20:01:25,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243535393] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:01:25,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:01:25,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-11-02 20:01:25,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285830555] [2022-11-02 20:01:25,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:01:25,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:01:25,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:01:25,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:01:25,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:01:25,193 INFO L87 Difference]: Start difference. First operand 249 states and 356 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-02 20:01:26,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:01:26,196 INFO L93 Difference]: Finished difference Result 304 states and 430 transitions. [2022-11-02 20:01:26,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:01:26,197 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 57 [2022-11-02 20:01:26,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:01:26,200 INFO L225 Difference]: With dead ends: 304 [2022-11-02 20:01:26,200 INFO L226 Difference]: Without dead ends: 302 [2022-11-02 20:01:26,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:01:26,201 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 71 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:01:26,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 251 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:01:26,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-11-02 20:01:26,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 261. [2022-11-02 20:01:26,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 153 states have (on average 1.2026143790849673) internal successors, (184), 160 states have internal predecessors, (184), 91 states have call successors, (91), 16 states have call predecessors, (91), 16 states have return successors, (90), 84 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-02 20:01:26,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 365 transitions. [2022-11-02 20:01:26,383 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 365 transitions. Word has length 57 [2022-11-02 20:01:26,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:01:26,384 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 365 transitions. [2022-11-02 20:01:26,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-02 20:01:26,384 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 365 transitions. [2022-11-02 20:01:26,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-02 20:01:26,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:01:26,385 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:01:26,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:01:26,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:01:26,612 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:01:26,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:01:26,612 INFO L85 PathProgramCache]: Analyzing trace with hash 513336511, now seen corresponding path program 2 times [2022-11-02 20:01:26,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:01:26,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706516327] [2022-11-02 20:01:26,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:01:26,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:01:26,631 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:01:26,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1679912249] [2022-11-02 20:01:26,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:01:26,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:01:26,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:01:26,655 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:01:26,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:01:26,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:01:26,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:01:26,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:01:26,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:01:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-02 20:01:26,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:01:26,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:01:26,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706516327] [2022-11-02 20:01:26,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:01:26,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679912249] [2022-11-02 20:01:26,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679912249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:01:26,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:01:26,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:01:26,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12752232] [2022-11-02 20:01:26,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:01:26,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:01:26,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:01:26,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:01:26,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:01:26,794 INFO L87 Difference]: Start difference. First operand 261 states and 365 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 20:01:27,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:01:27,081 INFO L93 Difference]: Finished difference Result 453 states and 630 transitions. [2022-11-02 20:01:27,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:01:27,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2022-11-02 20:01:27,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:01:27,084 INFO L225 Difference]: With dead ends: 453 [2022-11-02 20:01:27,085 INFO L226 Difference]: Without dead ends: 272 [2022-11-02 20:01:27,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:01:27,087 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:01:27,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 103 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:01:27,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-02 20:01:27,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 252. [2022-11-02 20:01:27,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 152 states have (on average 1.1973684210526316) internal successors, (182), 153 states have internal predecessors, (182), 83 states have call successors, (83), 16 states have call predecessors, (83), 16 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2022-11-02 20:01:27,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 347 transitions. [2022-11-02 20:01:27,262 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 347 transitions. Word has length 62 [2022-11-02 20:01:27,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:01:27,262 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 347 transitions. [2022-11-02 20:01:27,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 20:01:27,263 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 347 transitions. [2022-11-02 20:01:27,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-02 20:01:27,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:01:27,264 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:01:27,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:01:27,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:01:27,467 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:01:27,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:01:27,467 INFO L85 PathProgramCache]: Analyzing trace with hash -420355271, now seen corresponding path program 3 times [2022-11-02 20:01:27,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:01:27,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341288531] [2022-11-02 20:01:27,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:01:27,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:01:27,500 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:01:27,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658650264] [2022-11-02 20:01:27,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:01:27,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:01:27,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:01:27,503 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:01:27,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:01:27,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:01:27,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:01:27,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-02 20:01:27,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:01:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 20:01:28,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:01:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 20:01:38,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:01:38,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341288531] [2022-11-02 20:01:38,951 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:01:38,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658650264] [2022-11-02 20:01:38,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658650264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:01:38,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:01:38,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2022-11-02 20:01:38,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178053196] [2022-11-02 20:01:38,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:01:38,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:01:38,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:01:38,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:01:38,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=638, Unknown=1, NotChecked=0, Total=756 [2022-11-02 20:01:38,955 INFO L87 Difference]: Start difference. First operand 252 states and 347 transitions. Second operand has 28 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-02 20:02:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:02:23,207 INFO L93 Difference]: Finished difference Result 347 states and 466 transitions. [2022-11-02 20:02:23,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-02 20:02:23,208 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 62 [2022-11-02 20:02:23,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:02:23,211 INFO L225 Difference]: With dead ends: 347 [2022-11-02 20:02:23,211 INFO L226 Difference]: Without dead ends: 345 [2022-11-02 20:02:23,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 36.3s TimeCoverageRelationStatistics Valid=810, Invalid=3349, Unknown=1, NotChecked=0, Total=4160 [2022-11-02 20:02:23,214 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 229 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:02:23,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 341 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 1327 Invalid, 0 Unknown, 245 Unchecked, 15.8s Time] [2022-11-02 20:02:23,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-11-02 20:02:23,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 280. [2022-11-02 20:02:23,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 173 states have (on average 1.1734104046242775) internal successors, (203), 175 states have internal predecessors, (203), 85 states have call successors, (85), 21 states have call predecessors, (85), 21 states have return successors, (84), 83 states have call predecessors, (84), 84 states have call successors, (84) [2022-11-02 20:02:23,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 372 transitions. [2022-11-02 20:02:23,410 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 372 transitions. Word has length 62 [2022-11-02 20:02:23,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:02:23,410 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 372 transitions. [2022-11-02 20:02:23,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-02 20:02:23,411 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 372 transitions. [2022-11-02 20:02:23,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-02 20:02:23,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:02:23,412 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:02:23,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:02:23,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:02:23,620 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:02:23,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:02:23,620 INFO L85 PathProgramCache]: Analyzing trace with hash -819166674, now seen corresponding path program 1 times [2022-11-02 20:02:23,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:02:23,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656735821] [2022-11-02 20:02:23,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:02:23,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:02:23,631 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:02:23,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876004526] [2022-11-02 20:02:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:02:23,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:02:23,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:02:23,637 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:02:23,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:02:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:02:23,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-02 20:02:23,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:02:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 52 proven. 28 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-02 20:02:26,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:02:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-02 20:02:33,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:02:33,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656735821] [2022-11-02 20:02:33,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:02:33,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876004526] [2022-11-02 20:02:33,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876004526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:02:33,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:02:33,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2022-11-02 20:02:33,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109961721] [2022-11-02 20:02:33,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:02:33,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 20:02:33,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:02:33,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 20:02:33,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-11-02 20:02:33,866 INFO L87 Difference]: Start difference. First operand 280 states and 372 transitions. Second operand has 27 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 10 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-11-02 20:02:47,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:02:51,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:02:57,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:03:01,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:03:03,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:03:23,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:03:24,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:03:33,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:03:36,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:03:38,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:03:47,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:03:47,770 INFO L93 Difference]: Finished difference Result 434 states and 593 transitions. [2022-11-02 20:03:47,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-02 20:03:47,771 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 10 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 76 [2022-11-02 20:03:47,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:03:47,775 INFO L225 Difference]: With dead ends: 434 [2022-11-02 20:03:47,775 INFO L226 Difference]: Without dead ends: 430 [2022-11-02 20:03:47,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 131 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=726, Invalid=3434, Unknown=0, NotChecked=0, Total=4160 [2022-11-02 20:03:47,778 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 132 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 1983 mSolverCounterSat, 365 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 2356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 1983 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:03:47,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 387 Invalid, 2356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 1983 Invalid, 8 Unknown, 0 Unchecked, 41.7s Time] [2022-11-02 20:03:47,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-11-02 20:03:48,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 386. [2022-11-02 20:03:48,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 234 states have (on average 1.1923076923076923) internal successors, (279), 236 states have internal predecessors, (279), 125 states have call successors, (125), 26 states have call predecessors, (125), 26 states have return successors, (124), 123 states have call predecessors, (124), 124 states have call successors, (124) [2022-11-02 20:03:48,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 528 transitions. [2022-11-02 20:03:48,143 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 528 transitions. Word has length 76 [2022-11-02 20:03:48,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:03:48,143 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 528 transitions. [2022-11-02 20:03:48,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 10 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-11-02 20:03:48,144 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 528 transitions. [2022-11-02 20:03:48,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-02 20:03:48,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:03:48,146 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:03:48,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:03:48,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:03:48,364 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:03:48,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:03:48,364 INFO L85 PathProgramCache]: Analyzing trace with hash 685229769, now seen corresponding path program 1 times [2022-11-02 20:03:48,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:03:48,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725804255] [2022-11-02 20:03:48,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:03:48,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:03:48,374 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:03:48,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896596210] [2022-11-02 20:03:48,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:03:48,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:03:48,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:03:48,376 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:03:48,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:03:48,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:03:48,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-02 20:03:48,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:03:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 46 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-11-02 20:03:49,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:03:51,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:03:51,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725804255] [2022-11-02 20:03:51,183 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:03:51,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896596210] [2022-11-02 20:03:51,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896596210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:03:51,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:03:51,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-11-02 20:03:51,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207495370] [2022-11-02 20:03:51,184 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:03:51,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:03:51,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:03:51,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:03:51,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=182, Unknown=1, NotChecked=0, Total=240 [2022-11-02 20:03:51,185 INFO L87 Difference]: Start difference. First operand 386 states and 528 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-02 20:03:52,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:03:52,114 INFO L93 Difference]: Finished difference Result 425 states and 581 transitions. [2022-11-02 20:03:52,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:03:52,115 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2022-11-02 20:03:52,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:03:52,118 INFO L225 Difference]: With dead ends: 425 [2022-11-02 20:03:52,118 INFO L226 Difference]: Without dead ends: 423 [2022-11-02 20:03:52,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=68, Invalid=237, Unknown=1, NotChecked=0, Total=306 [2022-11-02 20:03:52,119 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 44 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:03:52,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 178 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:03:52,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-11-02 20:03:52,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 415. [2022-11-02 20:03:52,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 249 states have (on average 1.1967871485943775) internal successors, (298), 251 states have internal predecessors, (298), 137 states have call successors, (137), 28 states have call predecessors, (137), 28 states have return successors, (136), 135 states have call predecessors, (136), 136 states have call successors, (136) [2022-11-02 20:03:52,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 571 transitions. [2022-11-02 20:03:52,465 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 571 transitions. Word has length 79 [2022-11-02 20:03:52,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:03:52,466 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 571 transitions. [2022-11-02 20:03:52,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-02 20:03:52,466 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 571 transitions. [2022-11-02 20:03:52,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-02 20:03:52,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:03:52,469 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:03:52,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:03:52,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:03:52,680 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:03:52,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:03:52,680 INFO L85 PathProgramCache]: Analyzing trace with hash -717331702, now seen corresponding path program 2 times [2022-11-02 20:03:52,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:03:52,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872476035] [2022-11-02 20:03:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:03:52,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:03:52,692 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:03:52,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193173668] [2022-11-02 20:03:52,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:03:52,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:03:52,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:03:52,694 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:03:52,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9e796c4-890c-446e-87c4-031659b8dda6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:03:52,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:03:52,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:03:52,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-02 20:03:52,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:03:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 112 proven. 50 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-11-02 20:03:57,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:04:39,887 WARN L234 SmtUtils]: Spent 20.07s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)