./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --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 fe22a831ab045bcc67da4505e3ba36b6f549cf1239b349bc9f8fd22458d7fbac --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:47:52,794 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:47:52,893 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 04:47:52,901 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:47:52,902 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:47:52,936 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:47:52,938 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:47:52,938 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:47:52,938 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:47:52,939 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:47:52,939 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:47:52,939 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:47:52,940 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:47:52,940 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:47:52,941 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:47:52,941 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:47:52,941 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:47:52,941 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:47:52,941 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:47:52,941 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:47:52,941 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:47:52,942 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:47:52,942 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:47:52,942 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:47:52,942 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:47:52,942 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:47:52,942 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:47:52,942 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:47:52,942 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:47:52,942 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:47:52,943 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:47:52,943 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:47:52,943 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:47:52,943 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:47:52,943 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:47:52,943 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:47:52,943 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:47:52,943 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:47:52,944 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:47:52,944 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:47:52,944 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:47:52,944 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:47:52,944 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:47:52,944 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:47:52,944 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:47:52,944 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:47:52,944 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:47:52,944 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:47:52,944 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness 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 -> fe22a831ab045bcc67da4505e3ba36b6f549cf1239b349bc9f8fd22458d7fbac [2024-11-28 04:47:53,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:47:53,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:47:53,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:47:53,256 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:47:53,257 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:47:53,258 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c [2024-11-28 04:47:56,193 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/data/ecca6e3ed/441db5c15859470585910d13f519e475/FLAG68b08c952 [2024-11-28 04:47:56,507 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:47:56,507 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c [2024-11-28 04:47:56,515 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/data/ecca6e3ed/441db5c15859470585910d13f519e475/FLAG68b08c952 [2024-11-28 04:47:56,769 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/data/ecca6e3ed/441db5c15859470585910d13f519e475 [2024-11-28 04:47:56,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:47:56,774 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:47:56,777 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:47:56,777 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:47:56,783 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:47:56,784 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:47:56" (1/1) ... [2024-11-28 04:47:56,785 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9c2b10e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:47:56, skipping insertion in model container [2024-11-28 04:47:56,786 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:47:56" (1/1) ... [2024-11-28 04:47:56,807 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:47:56,992 WARN L250 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_25198acf-1600-4883-ac54-c6a3d3769f60/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c[1175,1188] [2024-11-28 04:47:57,013 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:47:57,022 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:47:57,035 WARN L250 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_25198acf-1600-4883-ac54-c6a3d3769f60/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound5.c[1175,1188] [2024-11-28 04:47:57,049 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:47:57,069 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:47:57,070 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:47:57 WrapperNode [2024-11-28 04:47:57,070 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:47:57,071 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:47:57,073 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:47:57,073 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:47:57,081 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:47:57" (1/1) ... [2024-11-28 04:47:57,087 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:47:57" (1/1) ... [2024-11-28 04:47:57,106 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2024-11-28 04:47:57,108 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:47:57,108 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:47:57,109 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:47:57,109 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:47:57,119 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:47:57" (1/1) ... [2024-11-28 04:47:57,120 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:47:57" (1/1) ... [2024-11-28 04:47:57,125 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:47:57" (1/1) ... [2024-11-28 04:47:57,143 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-28 04:47:57,143 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:47:57" (1/1) ... [2024-11-28 04:47:57,143 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:47:57" (1/1) ... [2024-11-28 04:47:57,150 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:47:57" (1/1) ... [2024-11-28 04:47:57,151 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:47:57" (1/1) ... [2024-11-28 04:47:57,155 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:47:57" (1/1) ... [2024-11-28 04:47:57,158 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:47:57" (1/1) ... [2024-11-28 04:47:57,159 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:47:57" (1/1) ... [2024-11-28 04:47:57,160 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:47:57,164 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:47:57,164 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:47:57,164 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:47:57,165 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:47:57" (1/1) ... [2024-11-28 04:47:57,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:47:57,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:47:57,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:47:57,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:47:57,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:47:57,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:47:57,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:47:57,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:47:57,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 04:47:57,234 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 04:47:57,299 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:47:57,301 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:47:57,430 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-28 04:47:57,430 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:47:57,439 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:47:57,440 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-28 04:47:57,440 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:47:57 BoogieIcfgContainer [2024-11-28 04:47:57,440 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:47:57,442 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:47:57,442 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:47:57,447 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:47:57,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:47:56" (1/3) ... [2024-11-28 04:47:57,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a760fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:47:57, skipping insertion in model container [2024-11-28 04:47:57,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:47:57" (2/3) ... [2024-11-28 04:47:57,449 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a760fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:47:57, skipping insertion in model container [2024-11-28 04:47:57,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:47:57" (3/3) ... [2024-11-28 04:47:57,450 INFO L128 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound5.c [2024-11-28 04:47:57,466 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:47:57,467 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG prodbin-ll_unwindbound5.c that has 2 procedures, 21 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-28 04:47:57,528 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:47:57,543 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@75d44a06, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:47:57,543 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 04:47:57,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:47:57,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-28 04:47:57,556 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:47:57,556 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:47:57,556 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:47:57,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:47:57,564 INFO L85 PathProgramCache]: Analyzing trace with hash -572597424, now seen corresponding path program 1 times [2024-11-28 04:47:57,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:47:57,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638266362] [2024-11-28 04:47:57,572 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:47:57,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:47:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:47:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:47:57,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:47:57,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638266362] [2024-11-28 04:47:57,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638266362] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:47:57,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:47:57,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:47:57,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775703011] [2024-11-28 04:47:57,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:47:57,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 04:47:57,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:47:57,735 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 04:47:57,736 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:47:57,738 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:47:57,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:47:57,755 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2024-11-28 04:47:57,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 04:47:57,757 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-28 04:47:57,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:47:57,764 INFO L225 Difference]: With dead ends: 39 [2024-11-28 04:47:57,764 INFO L226 Difference]: Without dead ends: 17 [2024-11-28 04:47:57,767 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:47:57,770 INFO L435 NwaCegarLoop]: 24 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, 24 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 [2024-11-28 04:47:57,771 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:47:57,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-28 04:47:57,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-28 04:47:57,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 04:47:57,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-11-28 04:47:57,807 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2024-11-28 04:47:57,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:47:57,808 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-11-28 04:47:57,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:47:57,808 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-11-28 04:47:57,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 04:47:57,809 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:47:57,809 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:47:57,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:47:57,810 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:47:57,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:47:57,810 INFO L85 PathProgramCache]: Analyzing trace with hash -2015978753, now seen corresponding path program 1 times [2024-11-28 04:47:57,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:47:57,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550328578] [2024-11-28 04:47:57,811 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:47:57,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:47:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:47:57,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414563704] [2024-11-28 04:47:57,840 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:47:57,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:47:57,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:47:57,842 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:47:57,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:47:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:47:57,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:47:57,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:47:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:47:58,139 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:47:58,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:47:58,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550328578] [2024-11-28 04:47:58,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:47:58,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414563704] [2024-11-28 04:47:58,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414563704] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:47:58,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:47:58,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:47:58,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417957167] [2024-11-28 04:47:58,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:47:58,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:47:58,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:47:58,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:47:58,144 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:47:58,145 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:47:58,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:47:58,238 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2024-11-28 04:47:58,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:47:58,238 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-28 04:47:58,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:47:58,239 INFO L225 Difference]: With dead ends: 30 [2024-11-28 04:47:58,239 INFO L226 Difference]: Without dead ends: 28 [2024-11-28 04:47:58,240 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:47:58,241 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:47:58,241 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 48 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:47:58,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-28 04:47:58,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2024-11-28 04:47:58,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 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) [2024-11-28 04:47:58,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-11-28 04:47:58,270 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 10 [2024-11-28 04:47:58,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:47:58,271 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-11-28 04:47:58,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:47:58,271 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-11-28 04:47:58,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 04:47:58,273 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:47:58,273 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:47:58,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 04:47:58,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:47:58,478 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:47:58,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:47:58,478 INFO L85 PathProgramCache]: Analyzing trace with hash -2014072129, now seen corresponding path program 1 times [2024-11-28 04:47:58,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:47:58,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488866358] [2024-11-28 04:47:58,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:47:58,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:47:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:47:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:47:58,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:47:58,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488866358] [2024-11-28 04:47:58,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488866358] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:47:58,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:47:58,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:47:58,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897075539] [2024-11-28 04:47:58,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:47:58,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:47:58,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:47:58,551 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:47:58,551 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:47:58,551 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:47:58,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:47:58,575 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2024-11-28 04:47:58,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:47:58,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-28 04:47:58,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:47:58,578 INFO L225 Difference]: With dead ends: 31 [2024-11-28 04:47:58,578 INFO L226 Difference]: Without dead ends: 24 [2024-11-28 04:47:58,578 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:47:58,579 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:47:58,579 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:47:58,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-28 04:47:58,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-28 04:47:58,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 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) [2024-11-28 04:47:58,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-28 04:47:58,588 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2024-11-28 04:47:58,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:47:58,588 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-28 04:47:58,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:47:58,588 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-28 04:47:58,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-28 04:47:58,589 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:47:58,589 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:47:58,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 04:47:58,589 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:47:58,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:47:58,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1812154710, now seen corresponding path program 1 times [2024-11-28 04:47:58,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:47:58,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381474494] [2024-11-28 04:47:58,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:47:58,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:47:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:47:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:47:58,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:47:58,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381474494] [2024-11-28 04:47:58,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381474494] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:47:58,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:47:58,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:47:58,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126681325] [2024-11-28 04:47:58,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:47:58,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:47:58,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:47:58,827 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:47:58,827 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:47:58,827 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 04:47:58,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:47:58,865 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2024-11-28 04:47:58,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:47:58,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-11-28 04:47:58,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:47:58,866 INFO L225 Difference]: With dead ends: 34 [2024-11-28 04:47:58,866 INFO L226 Difference]: Without dead ends: 27 [2024-11-28 04:47:58,867 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:47:58,867 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:47:58,868 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 43 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:47:58,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-28 04:47:58,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2024-11-28 04:47:58,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:47:58,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-28 04:47:58,873 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2024-11-28 04:47:58,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:47:58,873 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-28 04:47:58,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 04:47:58,873 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-28 04:47:58,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-28 04:47:58,874 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:47:58,874 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:47:58,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 04:47:58,874 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:47:58,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:47:58,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1158688449, now seen corresponding path program 1 times [2024-11-28 04:47:58,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:47:58,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673094292] [2024-11-28 04:47:58,875 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:47:58,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:47:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:47:58,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022669693] [2024-11-28 04:47:58,913 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:47:58,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:47:58,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:47:58,921 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:47:58,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:47:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:47:58,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:47:59,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:47:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:47:59,548 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:48:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:48:00,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:48:00,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673094292] [2024-11-28 04:48:00,380 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:48:00,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022669693] [2024-11-28 04:48:00,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022669693] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:48:00,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:48:00,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2024-11-28 04:48:00,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705530200] [2024-11-28 04:48:00,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:48:00,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:48:00,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:48:00,382 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:48:00,383 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:48:00,385 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 04:48:00,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:48:00,567 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2024-11-28 04:48:00,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:48:00,567 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-11-28 04:48:00,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:48:00,568 INFO L225 Difference]: With dead ends: 39 [2024-11-28 04:48:00,568 INFO L226 Difference]: Without dead ends: 37 [2024-11-28 04:48:00,568 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:48:00,569 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:48:00,569 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 66 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:48:00,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-28 04:48:00,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-11-28 04:48:00,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 04:48:00,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2024-11-28 04:48:00,580 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 20 [2024-11-28 04:48:00,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:48:00,580 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2024-11-28 04:48:00,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 04:48:00,581 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2024-11-28 04:48:00,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-28 04:48:00,582 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:48:00,582 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:48:00,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 04:48:00,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:48:00,783 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:48:00,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:48:00,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1160595073, now seen corresponding path program 1 times [2024-11-28 04:48:00,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:48:00,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400798965] [2024-11-28 04:48:00,783 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:48:00,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:48:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:48:00,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:48:00,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:48:00,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400798965] [2024-11-28 04:48:00,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400798965] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:48:00,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161871597] [2024-11-28 04:48:00,898 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:48:00,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:48:00,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:48:00,901 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:48:00,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:48:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:48:00,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:48:00,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:48:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:48:00,997 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:48:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:48:01,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161871597] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:48:01,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:48:01,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-11-28 04:48:01,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653562006] [2024-11-28 04:48:01,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:48:01,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:48:01,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:48:01,059 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:48:01,059 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:48:01,059 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:48:01,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:48:01,165 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2024-11-28 04:48:01,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 04:48:01,166 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2024-11-28 04:48:01,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:48:01,168 INFO L225 Difference]: With dead ends: 95 [2024-11-28 04:48:01,168 INFO L226 Difference]: Without dead ends: 88 [2024-11-28 04:48:01,168 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:48:01,169 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:48:01,169 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 76 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:48:01,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-28 04:48:01,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2024-11-28 04:48:01,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 69 states have internal predecessors, (84), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 04:48:01,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2024-11-28 04:48:01,188 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 20 [2024-11-28 04:48:01,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:48:01,188 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2024-11-28 04:48:01,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:48:01,188 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2024-11-28 04:48:01,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-28 04:48:01,189 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:48:01,189 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:48:01,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 04:48:01,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:48:01,395 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:48:01,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:48:01,395 INFO L85 PathProgramCache]: Analyzing trace with hash 349341823, now seen corresponding path program 1 times [2024-11-28 04:48:01,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:48:01,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314597881] [2024-11-28 04:48:01,396 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:48:01,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:48:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:48:01,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809093261] [2024-11-28 04:48:01,429 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:48:01,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:48:01,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:48:01,433 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:48:01,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:48:01,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:48:01,491 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 04:48:01,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:48:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:48:01,826 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:48:02,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:48:02,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:48:02,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314597881] [2024-11-28 04:48:02,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:48:02,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809093261] [2024-11-28 04:48:02,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809093261] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:48:02,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:48:02,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2024-11-28 04:48:02,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299292023] [2024-11-28 04:48:02,472 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:48:02,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 04:48:02,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:48:02,473 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 04:48:02,473 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:48:02,473 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:48:02,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:48:02,930 INFO L93 Difference]: Finished difference Result 127 states and 153 transitions. [2024-11-28 04:48:02,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:48:02,931 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2024-11-28 04:48:02,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:48:02,932 INFO L225 Difference]: With dead ends: 127 [2024-11-28 04:48:02,932 INFO L226 Difference]: Without dead ends: 118 [2024-11-28 04:48:02,933 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2024-11-28 04:48:02,933 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:48:02,934 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 99 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:48:02,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-28 04:48:02,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2024-11-28 04:48:02,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 82 states have internal predecessors, (97), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-28 04:48:02,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 118 transitions. [2024-11-28 04:48:02,967 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 118 transitions. Word has length 20 [2024-11-28 04:48:02,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:48:02,967 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 118 transitions. [2024-11-28 04:48:02,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:48:02,967 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 118 transitions. [2024-11-28 04:48:02,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-28 04:48:02,968 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:48:02,968 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:48:02,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 04:48:03,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:48:03,169 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:48:03,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:48:03,169 INFO L85 PathProgramCache]: Analyzing trace with hash -453278824, now seen corresponding path program 1 times [2024-11-28 04:48:03,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:48:03,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514493320] [2024-11-28 04:48:03,169 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:48:03,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:48:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:48:03,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080686313] [2024-11-28 04:48:03,208 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:48:03,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:48:03,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:48:03,212 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:48:03,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:48:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:48:03,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 04:48:03,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:48:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:48:03,338 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:48:03,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:48:03,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:48:03,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514493320] [2024-11-28 04:48:03,417 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:48:03,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080686313] [2024-11-28 04:48:03,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080686313] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:48:03,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:48:03,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2024-11-28 04:48:03,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579313511] [2024-11-28 04:48:03,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:48:03,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:48:03,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:48:03,419 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:48:03,419 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:48:03,419 INFO L87 Difference]: Start difference. First operand 100 states and 118 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:48:03,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:48:03,566 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2024-11-28 04:48:03,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:48:03,567 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2024-11-28 04:48:03,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:48:03,568 INFO L225 Difference]: With dead ends: 114 [2024-11-28 04:48:03,568 INFO L226 Difference]: Without dead ends: 99 [2024-11-28 04:48:03,569 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:48:03,569 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:48:03,570 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 95 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:48:03,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-28 04:48:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2024-11-28 04:48:03,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 77 states have (on average 1.155844155844156) internal successors, (89), 79 states have internal predecessors, (89), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-28 04:48:03,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2024-11-28 04:48:03,594 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 26 [2024-11-28 04:48:03,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:48:03,594 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2024-11-28 04:48:03,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:48:03,594 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2024-11-28 04:48:03,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-28 04:48:03,597 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:48:03,597 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:48:03,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 04:48:03,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-28 04:48:03,798 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:48:03,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:48:03,798 INFO L85 PathProgramCache]: Analyzing trace with hash -2034249279, now seen corresponding path program 1 times [2024-11-28 04:48:03,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:48:03,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266848114] [2024-11-28 04:48:03,799 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:48:03,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:48:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:48:03,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104755487] [2024-11-28 04:48:03,840 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:48:03,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:48:03,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:48:03,844 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:48:03,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:48:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:48:03,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 04:48:03,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:48:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:48:04,474 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:48:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:48:08,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:48:08,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266848114] [2024-11-28 04:48:08,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:48:08,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104755487] [2024-11-28 04:48:08,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104755487] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:48:08,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:48:08,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2024-11-28 04:48:08,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265004554] [2024-11-28 04:48:08,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:48:08,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 04:48:08,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:48:08,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 04:48:08,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-28 04:48:08,571 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:48:12,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:48:12,532 INFO L93 Difference]: Finished difference Result 139 states and 159 transitions. [2024-11-28 04:48:12,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 04:48:12,533 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2024-11-28 04:48:12,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:48:12,535 INFO L225 Difference]: With dead ends: 139 [2024-11-28 04:48:12,535 INFO L226 Difference]: Without dead ends: 137 [2024-11-28 04:48:12,535 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:48:12,536 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:48:12,536 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 198 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 04:48:12,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-28 04:48:12,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2024-11-28 04:48:12,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 109 states have (on average 1.165137614678899) internal successors, (127), 110 states have internal predecessors, (127), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-28 04:48:12,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2024-11-28 04:48:12,570 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 30 [2024-11-28 04:48:12,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:48:12,570 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2024-11-28 04:48:12,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:48:12,571 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2024-11-28 04:48:12,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-28 04:48:12,572 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:48:12,572 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:48:12,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 04:48:12,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-28 04:48:12,778 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:48:12,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:48:12,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1342308543, now seen corresponding path program 2 times [2024-11-28 04:48:12,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:48:12,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123594439] [2024-11-28 04:48:12,779 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:48:12,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:48:12,847 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:48:12,847 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:48:12,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569188038] [2024-11-28 04:48:12,850 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:48:12,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:48:12,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:48:12,856 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:48:12,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:48:12,927 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:48:12,927 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:48:12,929 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-28 04:48:12,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:48:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:48:15,016 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:48:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:48:16,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:48:16,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123594439] [2024-11-28 04:48:16,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:48:16,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569188038] [2024-11-28 04:48:16,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569188038] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:48:16,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:48:16,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2024-11-28 04:48:16,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122162418] [2024-11-28 04:48:16,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:48:16,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 04:48:16,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:48:16,289 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 04:48:16,289 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:48:16,289 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 04:48:18,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:48:18,165 INFO L93 Difference]: Finished difference Result 181 states and 214 transitions. [2024-11-28 04:48:18,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 04:48:18,166 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 40 [2024-11-28 04:48:18,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:48:18,168 INFO L225 Difference]: With dead ends: 181 [2024-11-28 04:48:18,168 INFO L226 Difference]: Without dead ends: 179 [2024-11-28 04:48:18,169 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=197, Invalid=673, Unknown=0, NotChecked=0, Total=870 [2024-11-28 04:48:18,169 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:48:18,170 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 208 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 04:48:18,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-11-28 04:48:18,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 162. [2024-11-28 04:48:18,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 132 states have (on average 1.1893939393939394) internal successors, (157), 134 states have internal predecessors, (157), 18 states have call successors, (18), 11 states have call predecessors, (18), 11 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-28 04:48:18,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 192 transitions. [2024-11-28 04:48:18,217 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 192 transitions. Word has length 40 [2024-11-28 04:48:18,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:48:18,218 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 192 transitions. [2024-11-28 04:48:18,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 04:48:18,218 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 192 transitions. [2024-11-28 04:48:18,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 04:48:18,223 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:48:18,223 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:48:18,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 04:48:18,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 04:48:18,424 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:48:18,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:48:18,425 INFO L85 PathProgramCache]: Analyzing trace with hash 362070727, now seen corresponding path program 2 times [2024-11-28 04:48:18,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:48:18,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241902244] [2024-11-28 04:48:18,426 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:48:18,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:48:18,459 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:48:18,460 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:48:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:48:18,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:48:18,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241902244] [2024-11-28 04:48:18,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241902244] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:48:18,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471144877] [2024-11-28 04:48:18,818 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:48:18,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:48:18,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:48:18,821 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:48:18,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:48:18,917 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:48:18,917 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:48:18,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 04:48:18,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:48:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:48:19,019 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:48:19,140 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:48:19,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471144877] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:48:19,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:48:19,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 9 [2024-11-28 04:48:19,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648896665] [2024-11-28 04:48:19,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:48:19,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 04:48:19,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:48:19,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 04:48:19,144 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:48:19,145 INFO L87 Difference]: Start difference. First operand 162 states and 192 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 04:48:19,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:48:19,259 INFO L93 Difference]: Finished difference Result 218 states and 258 transitions. [2024-11-28 04:48:19,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:48:19,260 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2024-11-28 04:48:19,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:48:19,262 INFO L225 Difference]: With dead ends: 218 [2024-11-28 04:48:19,262 INFO L226 Difference]: Without dead ends: 211 [2024-11-28 04:48:19,262 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 94 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:48:19,263 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 5 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:48:19,263 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 97 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:48:19,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-11-28 04:48:19,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2024-11-28 04:48:19,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 173 states have (on average 1.1618497109826589) internal successors, (201), 175 states have internal predecessors, (201), 22 states have call successors, (22), 15 states have call predecessors, (22), 15 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-28 04:48:19,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 244 transitions. [2024-11-28 04:48:19,298 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 244 transitions. Word has length 50 [2024-11-28 04:48:19,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:48:19,298 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 244 transitions. [2024-11-28 04:48:19,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 04:48:19,299 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 244 transitions. [2024-11-28 04:48:19,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 04:48:19,300 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:48:19,301 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-28 04:48:19,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 04:48:19,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:48:19,505 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:48:19,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:48:19,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1851640067, now seen corresponding path program 3 times [2024-11-28 04:48:19,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:48:19,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909389675] [2024-11-28 04:48:19,506 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:48:19,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:48:19,596 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 04:48:19,596 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:48:19,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682107999] [2024-11-28 04:48:19,598 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:48:19,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:48:19,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:48:19,600 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:48:19,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:48:19,665 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 04:48:19,665 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:48:19,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 04:48:19,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:48:23,193 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 62 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:48:23,193 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:48:24,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:48:24,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909389675] [2024-11-28 04:48:24,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:48:24,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682107999] [2024-11-28 04:48:24,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682107999] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:48:24,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:48:24,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-11-28 04:48:24,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195463970] [2024-11-28 04:48:24,746 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:48:24,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 04:48:24,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:48:24,747 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 04:48:24,747 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:48:24,747 INFO L87 Difference]: Start difference. First operand 211 states and 244 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 04:48:27,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:48:27,081 INFO L93 Difference]: Finished difference Result 282 states and 331 transitions. [2024-11-28 04:48:27,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:48:27,082 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 50 [2024-11-28 04:48:27,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:48:27,084 INFO L225 Difference]: With dead ends: 282 [2024-11-28 04:48:27,084 INFO L226 Difference]: Without dead ends: 280 [2024-11-28 04:48:27,084 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:48:27,085 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:48:27,085 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 175 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-28 04:48:27,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2024-11-28 04:48:27,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 211. [2024-11-28 04:48:27,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 171 states have (on average 1.1637426900584795) internal successors, (199), 175 states have internal predecessors, (199), 23 states have call successors, (23), 16 states have call predecessors, (23), 16 states have return successors, (22), 19 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-28 04:48:27,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 244 transitions. [2024-11-28 04:48:27,131 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 244 transitions. Word has length 50 [2024-11-28 04:48:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:48:27,132 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 244 transitions. [2024-11-28 04:48:27,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 04:48:27,132 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 244 transitions. [2024-11-28 04:48:27,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-28 04:48:27,133 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:48:27,133 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:48:27,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 04:48:27,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:48:27,338 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:48:27,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:48:27,338 INFO L85 PathProgramCache]: Analyzing trace with hash -270537591, now seen corresponding path program 3 times [2024-11-28 04:48:27,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:48:27,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518173385] [2024-11-28 04:48:27,338 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:48:27,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:48:27,389 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 04:48:27,389 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:48:27,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137564377] [2024-11-28 04:48:27,391 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:48:27,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:48:27,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:48:27,393 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:48:27,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:48:27,488 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 04:48:27,488 INFO L230 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-28 04:48:27,488 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 04:48:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 04:48:27,552 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-28 04:48:27,552 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 04:48:27,553 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-28 04:48:27,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 04:48:27,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 04:48:27,757 INFO L422 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:48:27,793 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 04:48:27,796 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:48:27 BoogieIcfgContainer [2024-11-28 04:48:27,796 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 04:48:27,797 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 04:48:27,797 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 04:48:27,797 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 04:48:27,798 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:47:57" (3/4) ... [2024-11-28 04:48:27,798 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-28 04:48:27,856 INFO L129 tionWitnessGenerator]: Generated YAML witness of length 37. [2024-11-28 04:48:27,949 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-28 04:48:27,949 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/witness.yml [2024-11-28 04:48:27,949 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 04:48:27,950 INFO L158 Benchmark]: Toolchain (without parser) took 31176.67ms. Allocated memory was 117.4MB in the beginning and 184.5MB in the end (delta: 67.1MB). Free memory was 93.2MB in the beginning and 93.3MB in the end (delta: -89.0kB). Peak memory consumption was 55.1MB. Max. memory is 16.1GB. [2024-11-28 04:48:27,950 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 167.8MB. Free memory is still 104.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:48:27,951 INFO L158 Benchmark]: CACSL2BoogieTranslator took 294.04ms. Allocated memory is still 117.4MB. Free memory was 93.2MB in the beginning and 82.1MB in the end (delta: 11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:48:27,951 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.54ms. Allocated memory is still 117.4MB. Free memory was 82.1MB in the beginning and 81.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:48:27,951 INFO L158 Benchmark]: Boogie Preprocessor took 54.68ms. Allocated memory is still 117.4MB. Free memory was 81.0MB in the beginning and 79.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:48:27,952 INFO L158 Benchmark]: RCFGBuilder took 276.70ms. Allocated memory is still 117.4MB. Free memory was 79.9MB in the beginning and 68.8MB in the end (delta: 11.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 04:48:27,952 INFO L158 Benchmark]: TraceAbstraction took 30353.42ms. Allocated memory was 117.4MB in the beginning and 184.5MB in the end (delta: 67.1MB). Free memory was 68.1MB in the beginning and 99.5MB in the end (delta: -31.3MB). Peak memory consumption was 29.9MB. Max. memory is 16.1GB. [2024-11-28 04:48:27,952 INFO L158 Benchmark]: Witness Printer took 152.43ms. Allocated memory is still 184.5MB. Free memory was 99.5MB in the beginning and 93.3MB in the end (delta: 6.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:48:27,954 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 167.8MB. Free memory is still 104.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 294.04ms. Allocated memory is still 117.4MB. Free memory was 93.2MB in the beginning and 82.1MB in the end (delta: 11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.54ms. Allocated memory is still 117.4MB. Free memory was 82.1MB in the beginning and 81.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 54.68ms. Allocated memory is still 117.4MB. Free memory was 81.0MB in the beginning and 79.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 276.70ms. Allocated memory is still 117.4MB. Free memory was 79.9MB in the beginning and 68.8MB in the end (delta: 11.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 30353.42ms. Allocated memory was 117.4MB in the beginning and 184.5MB in the end (delta: 67.1MB). Free memory was 68.1MB in the beginning and 99.5MB in the end (delta: -31.3MB). Peak memory consumption was 29.9MB. Max. memory is 16.1GB. * Witness Printer took 152.43ms. Allocated memory is still 184.5MB. Free memory was 99.5MB in the beginning and 93.3MB in the end (delta: 6.1MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 23]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L28] int counter = 0; VAL [counter=0] [L30] int a, b; [L31] long long x, y, z; [L33] a = __VERIFIER_nondet_int() [L34] b = __VERIFIER_nondet_int() [L35] CALL assume_abort_if_not(b >= 1) [L18] COND FALSE !(!cond) VAL [counter=0] [L35] RET assume_abort_if_not(b >= 1) [L37] x = a [L38] y = b [L39] z = 0 VAL [a=-1, b=127, counter=0, x=-1, y=127, z=0] [L41] EXPR counter++ VAL [a=-1, b=127, counter=1, x=-1, y=127, z=0] [L41] COND TRUE counter++<5 [L42] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=1] [L21] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=1] [L42] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-1, b=127, counter=1, x=-1, y=127, z=0] [L43] COND FALSE !(!(y != 0)) VAL [a=-1, b=127, counter=1, x=-1, y=127, z=0] [L46] COND TRUE y % 2 == 1 [L47] z = z + x [L48] y = y - 1 VAL [a=-1, b=127, counter=1, x=-1, y=126, z=-1] [L50] x = 2 * x [L51] y = y / 2 VAL [a=-1, b=127, counter=1, x=-2, y=63, z=-1] [L41] EXPR counter++ VAL [a=-1, b=127, counter=2, x=-2, y=63, z=-1] [L41] COND TRUE counter++<5 [L42] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=2] [L21] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=2] [L42] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-1, b=127, counter=2, x=-2, y=63, z=-1] [L43] COND FALSE !(!(y != 0)) VAL [a=-1, b=127, counter=2, x=-2, y=63, z=-1] [L46] COND TRUE y % 2 == 1 [L47] z = z + x [L48] y = y - 1 VAL [a=-1, b=127, counter=2, x=-2, y=62, z=-3] [L50] x = 2 * x [L51] y = y / 2 VAL [a=-1, b=127, counter=2, x=-4, y=31, z=-3] [L41] EXPR counter++ VAL [a=-1, b=127, counter=3, x=-4, y=31, z=-3] [L41] COND TRUE counter++<5 [L42] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=3] [L21] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=3] [L42] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-1, b=127, counter=3, x=-4, y=31, z=-3] [L43] COND FALSE !(!(y != 0)) VAL [a=-1, b=127, counter=3, x=-4, y=31, z=-3] [L46] COND TRUE y % 2 == 1 [L47] z = z + x [L48] y = y - 1 VAL [a=-1, b=127, counter=3, x=-4, y=30, z=-7] [L50] x = 2 * x [L51] y = y / 2 VAL [a=-1, b=127, counter=3, x=-8, y=15, z=-7] [L41] EXPR counter++ VAL [a=-1, b=127, counter=4, x=-8, y=15, z=-7] [L41] COND TRUE counter++<5 [L42] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=4] [L21] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=4] [L42] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-1, b=127, counter=4, x=-8, y=15, z=-7] [L43] COND FALSE !(!(y != 0)) VAL [a=-1, b=127, counter=4, x=-8, y=15, z=-7] [L46] COND TRUE y % 2 == 1 [L47] z = z + x [L48] y = y - 1 VAL [a=-1, b=127, counter=4, x=-8, y=14, z=-15] [L50] x = 2 * x [L51] y = y / 2 VAL [a=-1, b=127, counter=4, x=-16, y=7, z=-15] [L41] EXPR counter++ VAL [a=-1, b=127, counter=5, x=-16, y=7, z=-15] [L41] COND TRUE counter++<5 [L42] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=5] [L21] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L42] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-1, b=127, counter=5, x=-16, y=7, z=-15] [L43] COND FALSE !(!(y != 0)) VAL [a=-1, b=127, counter=5, x=-16, y=7, z=-15] [L46] COND TRUE y % 2 == 1 [L47] z = z + x [L48] y = y - 1 VAL [a=-1, b=127, counter=5, x=-16, y=6, z=-31] [L50] x = 2 * x [L51] y = y / 2 VAL [a=-1, b=127, counter=5, x=-32, y=3, z=-31] [L41] EXPR counter++ VAL [a=-1, b=127, counter=6, x=-32, y=3, z=-31] [L41] COND FALSE !(counter++<5) [L53] CALL __VERIFIER_assert(z == (long long) a * b) VAL [\old(cond)=0, counter=6] [L21] COND TRUE !(cond) VAL [\old(cond)=0, counter=6] [L23] reach_error() VAL [\old(cond)=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 30.3s, OverallIterations: 13, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 9.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 181 SdHoareTripleChecker+Valid, 4.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 171 mSDsluCounter, 1177 SdHoareTripleChecker+Invalid, 4.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 967 mSDsCounter, 54 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1082 IncrementalHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 54 mSolverCounterUnsat, 210 mSDtfsCounter, 1082 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 535 GetRequests, 381 SyntacticMatches, 16 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 13.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=211occurred in iteration=11, InterpolantAutomatonStates: 119, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 123 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 16.9s InterpolantComputationTime, 687 NumberOfCodeBlocks, 677 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 556 ConstructedInterpolants, 28 QuantifiedInterpolants, 5543 SizeOfPredicates, 18 NumberOfNonLiveVariables, 849 ConjunctsInSsa, 176 ConjunctsInUnsatCore, 21 InterpolantComputations, 5 PerfectInterpolantSequences, 263/496 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-28 04:48:27,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25198acf-1600-4883-ac54-c6a3d3769f60/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE