./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx --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 69030034dd333d91bcd0f7615fd4a158a32a8c2c03a6334daabdaad4c77a89b5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:13:18,051 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:13:18,185 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:13:18,190 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:13:18,191 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:13:18,243 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:13:18,244 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:13:18,245 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:13:18,247 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:13:18,252 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:13:18,253 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:13:18,253 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:13:18,254 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:13:18,256 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:13:18,257 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:13:18,257 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:13:18,258 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:13:18,258 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:13:18,259 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:13:18,259 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:13:18,260 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:13:18,260 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:13:18,261 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:13:18,261 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:13:18,262 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:13:18,262 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:13:18,263 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:13:18,276 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:13:18,276 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:13:18,277 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:13:18,278 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:13:18,279 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:13:18,279 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:13:18,279 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:13:18,280 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:13:18,280 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:13:18,280 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:13:18,281 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:13:18,281 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:13:18,281 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:13:18,282 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:13:18,283 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:13:18,283 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69030034dd333d91bcd0f7615fd4a158a32a8c2c03a6334daabdaad4c77a89b5 [2023-11-21 22:13:18,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:13:18,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:13:18,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:13:18,635 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:13:18,636 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:13:18,637 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c [2023-11-21 22:13:21,690 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:13:21,966 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:13:21,967 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c [2023-11-21 22:13:21,986 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/data/c57d27d83/f9dfc6c16be44c24a181f572ebd57a2d/FLAGab056ae29 [2023-11-21 22:13:22,017 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/data/c57d27d83/f9dfc6c16be44c24a181f572ebd57a2d [2023-11-21 22:13:22,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:13:22,021 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:13:22,023 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:13:22,023 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:13:22,028 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:13:22,029 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:13:22" (1/1) ... [2023-11-21 22:13:22,030 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39155c12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:22, skipping insertion in model container [2023-11-21 22:13:22,031 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:13:22" (1/1) ... [2023-11-21 22:13:22,121 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:13:22,275 WARN L240 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_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c[646,659] [2023-11-21 22:13:22,442 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:13:22,456 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:13:22,475 WARN L240 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_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c[646,659] [2023-11-21 22:13:22,557 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:13:22,576 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:13:22,577 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:22 WrapperNode [2023-11-21 22:13:22,577 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:13:22,578 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:13:22,578 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:13:22,578 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:13:22,586 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:22" (1/1) ... [2023-11-21 22:13:22,600 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:22" (1/1) ... [2023-11-21 22:13:22,655 INFO L138 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 862 [2023-11-21 22:13:22,655 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:13:22,656 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:13:22,656 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:13:22,656 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:13:22,667 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:22" (1/1) ... [2023-11-21 22:13:22,667 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:22" (1/1) ... [2023-11-21 22:13:22,673 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:22" (1/1) ... [2023-11-21 22:13:22,746 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 22:13:22,746 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:22" (1/1) ... [2023-11-21 22:13:22,746 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:22" (1/1) ... [2023-11-21 22:13:22,771 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:22" (1/1) ... [2023-11-21 22:13:22,808 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:22" (1/1) ... [2023-11-21 22:13:22,811 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:22" (1/1) ... [2023-11-21 22:13:22,814 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:22" (1/1) ... [2023-11-21 22:13:22,820 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:13:22,821 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:13:22,821 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:13:22,821 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:13:22,822 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:22" (1/1) ... [2023-11-21 22:13:22,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:13:22,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:22,890 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:13:22,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:13:22,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:13:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-21 22:13:22,943 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-21 22:13:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:13:22,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:13:22,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:13:23,097 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:13:23,100 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:13:24,084 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:13:24,409 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:13:24,409 INFO L308 CfgBuilder]: Removed 13 assume(true) statements. [2023-11-21 22:13:24,411 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:13:24 BoogieIcfgContainer [2023-11-21 22:13:24,411 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:13:24,416 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:13:24,416 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:13:24,419 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:13:24,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:13:22" (1/3) ... [2023-11-21 22:13:24,421 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b4e5f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:13:24, skipping insertion in model container [2023-11-21 22:13:24,422 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:22" (2/3) ... [2023-11-21 22:13:24,424 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b4e5f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:13:24, skipping insertion in model container [2023-11-21 22:13:24,425 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:13:24" (3/3) ... [2023-11-21 22:13:24,426 INFO L112 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.4.cil.c [2023-11-21 22:13:24,446 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:13:24,447 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 22:13:24,512 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:13:24,519 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@ed9a55d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:13:24,520 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 22:13:24,527 INFO L276 IsEmpty]: Start isEmpty. Operand has 231 states, 223 states have (on average 1.7847533632286996) internal successors, (398), 229 states have internal predecessors, (398), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-21 22:13:24,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-21 22:13:24,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:24,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:24,551 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:24,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:24,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1835475257, now seen corresponding path program 1 times [2023-11-21 22:13:24,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:24,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622468320] [2023-11-21 22:13:24,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:24,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:24,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:24,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622468320] [2023-11-21 22:13:24,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622468320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:24,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:24,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:13:24,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648588155] [2023-11-21 22:13:24,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:24,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:24,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:24,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:24,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:24,928 INFO L87 Difference]: Start difference. First operand has 231 states, 223 states have (on average 1.7847533632286996) internal successors, (398), 229 states have internal predecessors, (398), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 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) [2023-11-21 22:13:25,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:25,381 INFO L93 Difference]: Finished difference Result 624 states and 1094 transitions. [2023-11-21 22:13:25,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:25,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 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 24 [2023-11-21 22:13:25,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:25,398 INFO L225 Difference]: With dead ends: 624 [2023-11-21 22:13:25,398 INFO L226 Difference]: Without dead ends: 391 [2023-11-21 22:13:25,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:25,406 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 226 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:25,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 558 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:13:25,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2023-11-21 22:13:25,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 384. [2023-11-21 22:13:25,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 378 states have (on average 1.5343915343915344) internal successors, (580), 382 states have internal predecessors, (580), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:25,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 585 transitions. [2023-11-21 22:13:25,474 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 585 transitions. Word has length 24 [2023-11-21 22:13:25,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:25,474 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 585 transitions. [2023-11-21 22:13:25,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 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) [2023-11-21 22:13:25,475 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 585 transitions. [2023-11-21 22:13:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-21 22:13:25,483 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:25,483 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:25,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:13:25,484 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:25,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:25,485 INFO L85 PathProgramCache]: Analyzing trace with hash 2907092, now seen corresponding path program 1 times [2023-11-21 22:13:25,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:25,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365713921] [2023-11-21 22:13:25,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:25,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:25,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:25,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365713921] [2023-11-21 22:13:25,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365713921] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:25,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:25,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:13:25,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701411534] [2023-11-21 22:13:25,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:25,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:25,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:25,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:25,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:25,636 INFO L87 Difference]: Start difference. First operand 384 states and 585 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2023-11-21 22:13:25,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:25,878 INFO L93 Difference]: Finished difference Result 997 states and 1548 transitions. [2023-11-21 22:13:25,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:25,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 36 [2023-11-21 22:13:25,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:25,883 INFO L225 Difference]: With dead ends: 997 [2023-11-21 22:13:25,884 INFO L226 Difference]: Without dead ends: 623 [2023-11-21 22:13:25,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:25,890 INFO L413 NwaCegarLoop]: 472 mSDtfsCounter, 271 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:25,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 741 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:13:25,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2023-11-21 22:13:25,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 616. [2023-11-21 22:13:25,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 610 states have (on average 1.5721311475409836) internal successors, (959), 614 states have internal predecessors, (959), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:25,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 964 transitions. [2023-11-21 22:13:25,947 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 964 transitions. Word has length 36 [2023-11-21 22:13:25,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:25,948 INFO L495 AbstractCegarLoop]: Abstraction has 616 states and 964 transitions. [2023-11-21 22:13:25,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2023-11-21 22:13:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 964 transitions. [2023-11-21 22:13:25,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-21 22:13:25,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:25,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:25,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:13:25,959 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:25,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:25,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1335310999, now seen corresponding path program 1 times [2023-11-21 22:13:25,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:25,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489957219] [2023-11-21 22:13:25,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:25,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:26,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:26,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489957219] [2023-11-21 22:13:26,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489957219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:26,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:26,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:13:26,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527406649] [2023-11-21 22:13:26,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:26,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:26,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:26,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:26,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:26,101 INFO L87 Difference]: Start difference. First operand 616 states and 964 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 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) [2023-11-21 22:13:26,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:26,255 INFO L93 Difference]: Finished difference Result 1564 states and 2449 transitions. [2023-11-21 22:13:26,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:26,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 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 37 [2023-11-21 22:13:26,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:26,263 INFO L225 Difference]: With dead ends: 1564 [2023-11-21 22:13:26,264 INFO L226 Difference]: Without dead ends: 958 [2023-11-21 22:13:26,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:26,276 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 293 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:26,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 597 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:26,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2023-11-21 22:13:26,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 947. [2023-11-21 22:13:26,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 941 states have (on average 1.5642933049946866) internal successors, (1472), 945 states have internal predecessors, (1472), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1477 transitions. [2023-11-21 22:13:26,320 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1477 transitions. Word has length 37 [2023-11-21 22:13:26,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:26,321 INFO L495 AbstractCegarLoop]: Abstraction has 947 states and 1477 transitions. [2023-11-21 22:13:26,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 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) [2023-11-21 22:13:26,327 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1477 transitions. [2023-11-21 22:13:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-21 22:13:26,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:26,331 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:26,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:13:26,331 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:26,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:26,332 INFO L85 PathProgramCache]: Analyzing trace with hash -57749169, now seen corresponding path program 1 times [2023-11-21 22:13:26,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:26,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381416726] [2023-11-21 22:13:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:26,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:26,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:26,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381416726] [2023-11-21 22:13:26,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381416726] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:26,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:26,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:13:26,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433225432] [2023-11-21 22:13:26,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:26,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:26,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:26,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:26,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:26,449 INFO L87 Difference]: Start difference. First operand 947 states and 1477 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 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) [2023-11-21 22:13:26,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:26,612 INFO L93 Difference]: Finished difference Result 2552 states and 3989 transitions. [2023-11-21 22:13:26,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:26,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 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 41 [2023-11-21 22:13:26,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:26,623 INFO L225 Difference]: With dead ends: 2552 [2023-11-21 22:13:26,623 INFO L226 Difference]: Without dead ends: 1615 [2023-11-21 22:13:26,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:26,632 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 345 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:26,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 779 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:26,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2023-11-21 22:13:26,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1483. [2023-11-21 22:13:26,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1477 states have (on average 1.5517941773865944) internal successors, (2292), 1481 states have internal predecessors, (2292), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:26,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 2297 transitions. [2023-11-21 22:13:26,699 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 2297 transitions. Word has length 41 [2023-11-21 22:13:26,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:26,700 INFO L495 AbstractCegarLoop]: Abstraction has 1483 states and 2297 transitions. [2023-11-21 22:13:26,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 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) [2023-11-21 22:13:26,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 2297 transitions. [2023-11-21 22:13:26,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-21 22:13:26,701 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:26,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:26,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:13:26,702 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:26,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:26,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1023505927, now seen corresponding path program 1 times [2023-11-21 22:13:26,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:26,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688909333] [2023-11-21 22:13:26,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:26,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:26,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:26,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688909333] [2023-11-21 22:13:26,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688909333] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:26,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:26,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:13:26,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080751421] [2023-11-21 22:13:26,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:26,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:26,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:26,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:26,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:26,755 INFO L87 Difference]: Start difference. First operand 1483 states and 2297 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2023-11-21 22:13:26,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:26,973 INFO L93 Difference]: Finished difference Result 4224 states and 6532 transitions. [2023-11-21 22:13:26,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:26,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 48 [2023-11-21 22:13:26,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:26,989 INFO L225 Difference]: With dead ends: 4224 [2023-11-21 22:13:26,990 INFO L226 Difference]: Without dead ends: 2749 [2023-11-21 22:13:26,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:26,993 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 315 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:26,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 615 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:26,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2023-11-21 22:13:27,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 2702. [2023-11-21 22:13:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2702 states, 2696 states have (on average 1.524480712166172) internal successors, (4110), 2700 states have internal predecessors, (4110), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:27,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2702 states to 2702 states and 4115 transitions. [2023-11-21 22:13:27,115 INFO L78 Accepts]: Start accepts. Automaton has 2702 states and 4115 transitions. Word has length 48 [2023-11-21 22:13:27,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:27,116 INFO L495 AbstractCegarLoop]: Abstraction has 2702 states and 4115 transitions. [2023-11-21 22:13:27,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2023-11-21 22:13:27,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2702 states and 4115 transitions. [2023-11-21 22:13:27,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-21 22:13:27,117 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:27,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:27,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:13:27,118 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:27,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:27,119 INFO L85 PathProgramCache]: Analyzing trace with hash 712043435, now seen corresponding path program 1 times [2023-11-21 22:13:27,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:27,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717928419] [2023-11-21 22:13:27,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:27,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:27,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:27,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717928419] [2023-11-21 22:13:27,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717928419] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:27,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:27,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:13:27,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169692573] [2023-11-21 22:13:27,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:27,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:27,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:27,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:27,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:27,168 INFO L87 Difference]: Start difference. First operand 2702 states and 4115 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 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) [2023-11-21 22:13:27,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:27,383 INFO L93 Difference]: Finished difference Result 6379 states and 9688 transitions. [2023-11-21 22:13:27,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:27,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 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 48 [2023-11-21 22:13:27,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:27,404 INFO L225 Difference]: With dead ends: 6379 [2023-11-21 22:13:27,405 INFO L226 Difference]: Without dead ends: 3686 [2023-11-21 22:13:27,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:27,410 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 302 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:27,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 528 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:27,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3686 states. [2023-11-21 22:13:27,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3686 to 3516. [2023-11-21 22:13:27,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3516 states, 3510 states have (on average 1.5099715099715099) internal successors, (5300), 3514 states have internal predecessors, (5300), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:27,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3516 states to 3516 states and 5305 transitions. [2023-11-21 22:13:27,616 INFO L78 Accepts]: Start accepts. Automaton has 3516 states and 5305 transitions. Word has length 48 [2023-11-21 22:13:27,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:27,616 INFO L495 AbstractCegarLoop]: Abstraction has 3516 states and 5305 transitions. [2023-11-21 22:13:27,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 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) [2023-11-21 22:13:27,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3516 states and 5305 transitions. [2023-11-21 22:13:27,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-21 22:13:27,620 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:27,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:27,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 22:13:27,620 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:27,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:27,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1078666871, now seen corresponding path program 1 times [2023-11-21 22:13:27,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:27,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629218189] [2023-11-21 22:13:27,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:27,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:27,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:27,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629218189] [2023-11-21 22:13:27,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629218189] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:27,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:27,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:13:27,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21457030] [2023-11-21 22:13:27,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:27,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:27,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:27,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:27,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:27,739 INFO L87 Difference]: Start difference. First operand 3516 states and 5305 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2023-11-21 22:13:28,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:28,170 INFO L93 Difference]: Finished difference Result 8498 states and 12873 transitions. [2023-11-21 22:13:28,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:28,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 55 [2023-11-21 22:13:28,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:28,198 INFO L225 Difference]: With dead ends: 8498 [2023-11-21 22:13:28,199 INFO L226 Difference]: Without dead ends: 4991 [2023-11-21 22:13:28,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:28,205 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 214 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:28,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 628 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:13:28,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4991 states. [2023-11-21 22:13:28,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4991 to 4297. [2023-11-21 22:13:28,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4297 states, 4291 states have (on average 1.4483803309251924) internal successors, (6215), 4295 states have internal predecessors, (6215), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:28,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4297 states to 4297 states and 6220 transitions. [2023-11-21 22:13:28,446 INFO L78 Accepts]: Start accepts. Automaton has 4297 states and 6220 transitions. Word has length 55 [2023-11-21 22:13:28,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:28,447 INFO L495 AbstractCegarLoop]: Abstraction has 4297 states and 6220 transitions. [2023-11-21 22:13:28,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2023-11-21 22:13:28,447 INFO L276 IsEmpty]: Start isEmpty. Operand 4297 states and 6220 transitions. [2023-11-21 22:13:28,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-21 22:13:28,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:28,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:28,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 22:13:28,451 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:28,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:28,452 INFO L85 PathProgramCache]: Analyzing trace with hash 345150243, now seen corresponding path program 1 times [2023-11-21 22:13:28,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:28,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254999577] [2023-11-21 22:13:28,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:28,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:28,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:28,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254999577] [2023-11-21 22:13:28,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254999577] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:28,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:28,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:13:28,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251353333] [2023-11-21 22:13:28,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:28,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:28,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:28,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:28,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:28,521 INFO L87 Difference]: Start difference. First operand 4297 states and 6220 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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) [2023-11-21 22:13:28,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:28,744 INFO L93 Difference]: Finished difference Result 8460 states and 12274 transitions. [2023-11-21 22:13:28,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:28,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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 57 [2023-11-21 22:13:28,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:28,767 INFO L225 Difference]: With dead ends: 8460 [2023-11-21 22:13:28,768 INFO L226 Difference]: Without dead ends: 4172 [2023-11-21 22:13:28,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:28,775 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 287 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:28,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 334 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:28,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2023-11-21 22:13:29,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 4172. [2023-11-21 22:13:29,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4172 states, 4166 states have (on average 1.442150744119059) internal successors, (6008), 4170 states have internal predecessors, (6008), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:29,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4172 states to 4172 states and 6013 transitions. [2023-11-21 22:13:29,041 INFO L78 Accepts]: Start accepts. Automaton has 4172 states and 6013 transitions. Word has length 57 [2023-11-21 22:13:29,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:29,042 INFO L495 AbstractCegarLoop]: Abstraction has 4172 states and 6013 transitions. [2023-11-21 22:13:29,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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) [2023-11-21 22:13:29,042 INFO L276 IsEmpty]: Start isEmpty. Operand 4172 states and 6013 transitions. [2023-11-21 22:13:29,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-21 22:13:29,045 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:29,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:29,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 22:13:29,046 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:29,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:29,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1652194200, now seen corresponding path program 1 times [2023-11-21 22:13:29,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:29,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233820719] [2023-11-21 22:13:29,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:29,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:29,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:29,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233820719] [2023-11-21 22:13:29,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233820719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:29,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:29,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:13:29,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905498916] [2023-11-21 22:13:29,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:29,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:29,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:29,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:29,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:29,111 INFO L87 Difference]: Start difference. First operand 4172 states and 6013 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2023-11-21 22:13:29,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:29,355 INFO L93 Difference]: Finished difference Result 7786 states and 11309 transitions. [2023-11-21 22:13:29,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:29,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 58 [2023-11-21 22:13:29,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:29,377 INFO L225 Difference]: With dead ends: 7786 [2023-11-21 22:13:29,377 INFO L226 Difference]: Without dead ends: 3623 [2023-11-21 22:13:29,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:29,384 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 130 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:29,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 685 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:29,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2023-11-21 22:13:29,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 3036. [2023-11-21 22:13:29,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3036 states, 3030 states have (on average 1.4656765676567656) internal successors, (4441), 3034 states have internal predecessors, (4441), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:29,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3036 states to 3036 states and 4446 transitions. [2023-11-21 22:13:29,591 INFO L78 Accepts]: Start accepts. Automaton has 3036 states and 4446 transitions. Word has length 58 [2023-11-21 22:13:29,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:29,592 INFO L495 AbstractCegarLoop]: Abstraction has 3036 states and 4446 transitions. [2023-11-21 22:13:29,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2023-11-21 22:13:29,592 INFO L276 IsEmpty]: Start isEmpty. Operand 3036 states and 4446 transitions. [2023-11-21 22:13:29,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-21 22:13:29,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:29,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:29,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 22:13:29,594 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:29,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:29,595 INFO L85 PathProgramCache]: Analyzing trace with hash -302443767, now seen corresponding path program 1 times [2023-11-21 22:13:29,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:29,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449993357] [2023-11-21 22:13:29,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:29,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:29,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:29,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449993357] [2023-11-21 22:13:29,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449993357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:29,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:29,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:13:29,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618266617] [2023-11-21 22:13:29,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:29,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:13:29,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:29,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:13:29,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:13:29,719 INFO L87 Difference]: Start difference. First operand 3036 states and 4446 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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) [2023-11-21 22:13:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:30,260 INFO L93 Difference]: Finished difference Result 8363 states and 12168 transitions. [2023-11-21 22:13:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:13:30,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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 60 [2023-11-21 22:13:30,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:30,288 INFO L225 Difference]: With dead ends: 8363 [2023-11-21 22:13:30,288 INFO L226 Difference]: Without dead ends: 5424 [2023-11-21 22:13:30,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:13:30,295 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 698 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 1869 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:30,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [698 Valid, 1869 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:13:30,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5424 states. [2023-11-21 22:13:30,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5424 to 3700. [2023-11-21 22:13:30,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3700 states, 3694 states have (on average 1.4566865186789388) internal successors, (5381), 3698 states have internal predecessors, (5381), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:30,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3700 states to 3700 states and 5386 transitions. [2023-11-21 22:13:30,537 INFO L78 Accepts]: Start accepts. Automaton has 3700 states and 5386 transitions. Word has length 60 [2023-11-21 22:13:30,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:30,538 INFO L495 AbstractCegarLoop]: Abstraction has 3700 states and 5386 transitions. [2023-11-21 22:13:30,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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) [2023-11-21 22:13:30,538 INFO L276 IsEmpty]: Start isEmpty. Operand 3700 states and 5386 transitions. [2023-11-21 22:13:30,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-21 22:13:30,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:30,540 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:30,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 22:13:30,540 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:30,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:30,541 INFO L85 PathProgramCache]: Analyzing trace with hash 477478916, now seen corresponding path program 1 times [2023-11-21 22:13:30,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:30,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560738020] [2023-11-21 22:13:30,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:30,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:30,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:30,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560738020] [2023-11-21 22:13:30,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560738020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:30,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:30,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 22:13:30,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000738716] [2023-11-21 22:13:30,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:30,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:13:30,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:30,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:13:30,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:13:30,703 INFO L87 Difference]: Start difference. First operand 3700 states and 5386 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 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) [2023-11-21 22:13:31,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:31,290 INFO L93 Difference]: Finished difference Result 9029 states and 13013 transitions. [2023-11-21 22:13:31,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:13:31,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 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 61 [2023-11-21 22:13:31,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:31,304 INFO L225 Difference]: With dead ends: 9029 [2023-11-21 22:13:31,305 INFO L226 Difference]: Without dead ends: 5426 [2023-11-21 22:13:31,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:13:31,311 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 653 mSDsluCounter, 1795 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 2195 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:31,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 2195 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:13:31,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2023-11-21 22:13:31,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 3964. [2023-11-21 22:13:31,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3964 states, 3958 states have (on average 1.443911066195048) internal successors, (5715), 3962 states have internal predecessors, (5715), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:31,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3964 states to 3964 states and 5720 transitions. [2023-11-21 22:13:31,531 INFO L78 Accepts]: Start accepts. Automaton has 3964 states and 5720 transitions. Word has length 61 [2023-11-21 22:13:31,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:31,532 INFO L495 AbstractCegarLoop]: Abstraction has 3964 states and 5720 transitions. [2023-11-21 22:13:31,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 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) [2023-11-21 22:13:31,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3964 states and 5720 transitions. [2023-11-21 22:13:31,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-21 22:13:31,535 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:31,535 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:31,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 22:13:31,535 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:31,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:31,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1556560417, now seen corresponding path program 1 times [2023-11-21 22:13:31,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:31,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611578042] [2023-11-21 22:13:31,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:31,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:31,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:31,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611578042] [2023-11-21 22:13:31,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611578042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:31,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:31,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:13:31,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739105207] [2023-11-21 22:13:31,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:31,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:31,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:31,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:31,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:31,581 INFO L87 Difference]: Start difference. First operand 3964 states and 5720 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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) [2023-11-21 22:13:31,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:31,941 INFO L93 Difference]: Finished difference Result 8363 states and 12041 transitions. [2023-11-21 22:13:31,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:31,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 72 [2023-11-21 22:13:31,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:31,957 INFO L225 Difference]: With dead ends: 8363 [2023-11-21 22:13:31,957 INFO L226 Difference]: Without dead ends: 4423 [2023-11-21 22:13:31,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:31,966 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 130 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:31,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 632 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:31,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4423 states. [2023-11-21 22:13:32,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4423 to 4015. [2023-11-21 22:13:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4015 states, 4009 states have (on average 1.4400099775505113) internal successors, (5773), 4013 states have internal predecessors, (5773), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:32,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4015 states to 4015 states and 5778 transitions. [2023-11-21 22:13:32,209 INFO L78 Accepts]: Start accepts. Automaton has 4015 states and 5778 transitions. Word has length 72 [2023-11-21 22:13:32,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:32,210 INFO L495 AbstractCegarLoop]: Abstraction has 4015 states and 5778 transitions. [2023-11-21 22:13:32,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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) [2023-11-21 22:13:32,210 INFO L276 IsEmpty]: Start isEmpty. Operand 4015 states and 5778 transitions. [2023-11-21 22:13:32,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-21 22:13:32,212 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:32,212 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:32,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 22:13:32,213 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:32,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:32,213 INFO L85 PathProgramCache]: Analyzing trace with hash -30406294, now seen corresponding path program 1 times [2023-11-21 22:13:32,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:32,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115751623] [2023-11-21 22:13:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:32,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:32,298 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:32,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:32,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115751623] [2023-11-21 22:13:32,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115751623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:32,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:32,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:13:32,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863003359] [2023-11-21 22:13:32,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:32,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:32,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:32,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:32,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:32,302 INFO L87 Difference]: Start difference. First operand 4015 states and 5778 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2023-11-21 22:13:32,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:32,666 INFO L93 Difference]: Finished difference Result 8839 states and 12760 transitions. [2023-11-21 22:13:32,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:32,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 83 [2023-11-21 22:13:32,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:32,678 INFO L225 Difference]: With dead ends: 8839 [2023-11-21 22:13:32,678 INFO L226 Difference]: Without dead ends: 4901 [2023-11-21 22:13:32,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:32,684 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 147 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:32,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 722 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:32,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4901 states. [2023-11-21 22:13:32,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4901 to 4224. [2023-11-21 22:13:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4224 states, 4218 states have (on average 1.4378852536747273) internal successors, (6065), 4222 states have internal predecessors, (6065), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:32,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4224 states to 4224 states and 6070 transitions. [2023-11-21 22:13:32,912 INFO L78 Accepts]: Start accepts. Automaton has 4224 states and 6070 transitions. Word has length 83 [2023-11-21 22:13:32,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:32,912 INFO L495 AbstractCegarLoop]: Abstraction has 4224 states and 6070 transitions. [2023-11-21 22:13:32,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2023-11-21 22:13:32,913 INFO L276 IsEmpty]: Start isEmpty. Operand 4224 states and 6070 transitions. [2023-11-21 22:13:32,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-21 22:13:32,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:32,915 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:32,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-21 22:13:32,916 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:32,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:32,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1675747969, now seen corresponding path program 1 times [2023-11-21 22:13:32,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:32,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163334112] [2023-11-21 22:13:32,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:32,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:32,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:33,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:33,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163334112] [2023-11-21 22:13:33,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163334112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:33,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:33,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:13:33,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614026247] [2023-11-21 22:13:33,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:33,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:13:33,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:33,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:13:33,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:13:33,013 INFO L87 Difference]: Start difference. First operand 4224 states and 6070 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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) [2023-11-21 22:13:33,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:33,601 INFO L93 Difference]: Finished difference Result 10236 states and 14672 transitions. [2023-11-21 22:13:33,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:13:33,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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 93 [2023-11-21 22:13:33,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:33,618 INFO L225 Difference]: With dead ends: 10236 [2023-11-21 22:13:33,618 INFO L226 Difference]: Without dead ends: 6105 [2023-11-21 22:13:33,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:13:33,625 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 484 mSDsluCounter, 1326 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 1890 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:33,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 1890 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:13:33,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6105 states. [2023-11-21 22:13:33,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6105 to 4230. [2023-11-21 22:13:33,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4230 states, 4224 states have (on average 1.4344223484848484) internal successors, (6059), 4228 states have internal predecessors, (6059), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:33,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4230 states to 4230 states and 6064 transitions. [2023-11-21 22:13:33,856 INFO L78 Accepts]: Start accepts. Automaton has 4230 states and 6064 transitions. Word has length 93 [2023-11-21 22:13:33,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:33,856 INFO L495 AbstractCegarLoop]: Abstraction has 4230 states and 6064 transitions. [2023-11-21 22:13:33,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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) [2023-11-21 22:13:33,857 INFO L276 IsEmpty]: Start isEmpty. Operand 4230 states and 6064 transitions. [2023-11-21 22:13:33,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-21 22:13:33,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:33,859 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:33,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-21 22:13:33,860 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:33,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:33,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1645632932, now seen corresponding path program 1 times [2023-11-21 22:13:33,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:33,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572619305] [2023-11-21 22:13:33,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:33,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:13:33,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:33,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572619305] [2023-11-21 22:13:33,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572619305] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:33,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:33,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:13:33,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464833018] [2023-11-21 22:13:33,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:33,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:33,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:33,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:33,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:33,918 INFO L87 Difference]: Start difference. First operand 4230 states and 6064 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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) [2023-11-21 22:13:34,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:34,125 INFO L93 Difference]: Finished difference Result 6194 states and 8936 transitions. [2023-11-21 22:13:34,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:34,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 95 [2023-11-21 22:13:34,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:34,131 INFO L225 Difference]: With dead ends: 6194 [2023-11-21 22:13:34,131 INFO L226 Difference]: Without dead ends: 1994 [2023-11-21 22:13:34,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:34,139 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 319 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:34,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 454 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:34,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2023-11-21 22:13:34,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1964. [2023-11-21 22:13:34,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1958 states have (on average 1.3820224719101124) internal successors, (2706), 1962 states have internal predecessors, (2706), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:34,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 2711 transitions. [2023-11-21 22:13:34,267 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 2711 transitions. Word has length 95 [2023-11-21 22:13:34,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:34,267 INFO L495 AbstractCegarLoop]: Abstraction has 1964 states and 2711 transitions. [2023-11-21 22:13:34,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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) [2023-11-21 22:13:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 2711 transitions. [2023-11-21 22:13:34,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-21 22:13:34,269 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:34,269 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:34,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-21 22:13:34,270 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:34,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:34,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1412739745, now seen corresponding path program 1 times [2023-11-21 22:13:34,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:34,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137319753] [2023-11-21 22:13:34,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:34,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:34,365 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:34,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:34,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137319753] [2023-11-21 22:13:34,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137319753] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:34,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710403779] [2023-11-21 22:13:34,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:34,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:34,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:34,376 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:34,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:13:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:34,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:13:34,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:13:34,695 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:13:34,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710403779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:34,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:13:34,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-21 22:13:34,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27794271] [2023-11-21 22:13:34,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:34,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:34,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:34,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:34,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:13:34,698 INFO L87 Difference]: Start difference. First operand 1964 states and 2711 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2023-11-21 22:13:34,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:34,930 INFO L93 Difference]: Finished difference Result 2346 states and 3218 transitions. [2023-11-21 22:13:34,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:34,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 95 [2023-11-21 22:13:34,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:34,936 INFO L225 Difference]: With dead ends: 2346 [2023-11-21 22:13:34,936 INFO L226 Difference]: Without dead ends: 2342 [2023-11-21 22:13:34,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:13:34,938 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 209 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:34,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 639 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2023-11-21 22:13:35,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 2314. [2023-11-21 22:13:35,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 2308 states have (on average 1.3734835355285961) internal successors, (3170), 2312 states have internal predecessors, (3170), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:35,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 3175 transitions. [2023-11-21 22:13:35,058 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 3175 transitions. Word has length 95 [2023-11-21 22:13:35,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:35,059 INFO L495 AbstractCegarLoop]: Abstraction has 2314 states and 3175 transitions. [2023-11-21 22:13:35,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2023-11-21 22:13:35,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 3175 transitions. [2023-11-21 22:13:35,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-21 22:13:35,062 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:35,062 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:35,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:35,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-21 22:13:35,276 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:35,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:35,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1361681114, now seen corresponding path program 1 times [2023-11-21 22:13:35,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:35,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777778528] [2023-11-21 22:13:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:35,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:35,416 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:35,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:35,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777778528] [2023-11-21 22:13:35,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777778528] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:35,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783996276] [2023-11-21 22:13:35,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:35,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:35,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:35,418 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:35,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:13:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:35,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:13:35,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:35,677 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:13:35,678 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:13:35,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783996276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:35,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:13:35,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-21 22:13:35,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333990473] [2023-11-21 22:13:35,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:35,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:35,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:35,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:35,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:13:35,681 INFO L87 Difference]: Start difference. First operand 2314 states and 3175 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2023-11-21 22:13:35,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:35,896 INFO L93 Difference]: Finished difference Result 4477 states and 6182 transitions. [2023-11-21 22:13:35,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:35,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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 148 [2023-11-21 22:13:35,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:35,902 INFO L225 Difference]: With dead ends: 4477 [2023-11-21 22:13:35,902 INFO L226 Difference]: Without dead ends: 2314 [2023-11-21 22:13:35,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:13:35,906 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 238 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:35,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 341 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:35,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2023-11-21 22:13:36,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2314. [2023-11-21 22:13:36,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 2308 states have (on average 1.3405545927209706) internal successors, (3094), 2312 states have internal predecessors, (3094), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:36,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 3099 transitions. [2023-11-21 22:13:36,055 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 3099 transitions. Word has length 148 [2023-11-21 22:13:36,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:36,055 INFO L495 AbstractCegarLoop]: Abstraction has 2314 states and 3099 transitions. [2023-11-21 22:13:36,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2023-11-21 22:13:36,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 3099 transitions. [2023-11-21 22:13:36,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-21 22:13:36,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:36,060 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:36,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:36,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-21 22:13:36,281 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:36,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:36,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1724478791, now seen corresponding path program 1 times [2023-11-21 22:13:36,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:36,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241152575] [2023-11-21 22:13:36,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:36,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:13:36,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:36,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241152575] [2023-11-21 22:13:36,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241152575] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:36,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052372195] [2023-11-21 22:13:36,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:36,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:36,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:36,515 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:36,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:13:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:36,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:13:36,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 22:13:36,737 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:13:36,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052372195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:36,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:13:36,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-21 22:13:36,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431005285] [2023-11-21 22:13:36,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:36,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:36,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:36,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:36,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:13:36,740 INFO L87 Difference]: Start difference. First operand 2314 states and 3099 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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) [2023-11-21 22:13:36,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:36,918 INFO L93 Difference]: Finished difference Result 4477 states and 6030 transitions. [2023-11-21 22:13:36,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:36,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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 151 [2023-11-21 22:13:36,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:36,924 INFO L225 Difference]: With dead ends: 4477 [2023-11-21 22:13:36,924 INFO L226 Difference]: Without dead ends: 2314 [2023-11-21 22:13:36,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:13:36,928 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 248 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:36,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 313 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:36,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2023-11-21 22:13:37,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2314. [2023-11-21 22:13:37,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 2308 states have (on average 1.3084922010398614) internal successors, (3020), 2312 states have internal predecessors, (3020), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:37,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 3025 transitions. [2023-11-21 22:13:37,043 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 3025 transitions. Word has length 151 [2023-11-21 22:13:37,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:37,044 INFO L495 AbstractCegarLoop]: Abstraction has 2314 states and 3025 transitions. [2023-11-21 22:13:37,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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) [2023-11-21 22:13:37,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 3025 transitions. [2023-11-21 22:13:37,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-21 22:13:37,047 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:37,047 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:37,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:37,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-21 22:13:37,269 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:37,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:37,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1161466658, now seen corresponding path program 1 times [2023-11-21 22:13:37,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:37,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779854871] [2023-11-21 22:13:37,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:37,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:13:37,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:37,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779854871] [2023-11-21 22:13:37,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779854871] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:37,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32886163] [2023-11-21 22:13:37,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:37,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:37,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:37,479 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:37,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:13:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:37,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:13:37,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 22:13:37,662 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:13:37,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32886163] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:37,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:13:37,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-21 22:13:37,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879940390] [2023-11-21 22:13:37,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:37,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:37,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:37,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:37,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:13:37,666 INFO L87 Difference]: Start difference. First operand 2314 states and 3025 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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) [2023-11-21 22:13:38,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:38,176 INFO L93 Difference]: Finished difference Result 5098 states and 6788 transitions. [2023-11-21 22:13:38,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:38,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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 152 [2023-11-21 22:13:38,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:38,184 INFO L225 Difference]: With dead ends: 5098 [2023-11-21 22:13:38,184 INFO L226 Difference]: Without dead ends: 2935 [2023-11-21 22:13:38,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:13:38,189 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 181 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:38,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 556 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:13:38,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2023-11-21 22:13:38,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 2799. [2023-11-21 22:13:38,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2799 states, 2793 states have (on average 1.2864303616183315) internal successors, (3593), 2797 states have internal predecessors, (3593), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:38,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2799 states to 2799 states and 3598 transitions. [2023-11-21 22:13:38,348 INFO L78 Accepts]: Start accepts. Automaton has 2799 states and 3598 transitions. Word has length 152 [2023-11-21 22:13:38,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:38,349 INFO L495 AbstractCegarLoop]: Abstraction has 2799 states and 3598 transitions. [2023-11-21 22:13:38,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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) [2023-11-21 22:13:38,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2799 states and 3598 transitions. [2023-11-21 22:13:38,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-11-21 22:13:38,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:38,352 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:38,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:38,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:38,574 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:38,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:38,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1791827178, now seen corresponding path program 1 times [2023-11-21 22:13:38,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:38,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563201842] [2023-11-21 22:13:38,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:38,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:13:39,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:39,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563201842] [2023-11-21 22:13:39,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563201842] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:39,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961386336] [2023-11-21 22:13:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:39,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:39,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:39,039 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:39,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:13:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:39,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-21 22:13:39,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:13:39,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:13:39,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961386336] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:13:39,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:13:39,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2023-11-21 22:13:39,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966060287] [2023-11-21 22:13:39,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:39,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 22:13:39,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:39,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 22:13:39,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:13:39,670 INFO L87 Difference]: Start difference. First operand 2799 states and 3598 transitions. Second operand has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 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) [2023-11-21 22:13:40,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:40,510 INFO L93 Difference]: Finished difference Result 7344 states and 9438 transitions. [2023-11-21 22:13:40,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-21 22:13:40,511 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 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 154 [2023-11-21 22:13:40,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:40,522 INFO L225 Difference]: With dead ends: 7344 [2023-11-21 22:13:40,523 INFO L226 Difference]: Without dead ends: 4696 [2023-11-21 22:13:40,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-11-21 22:13:40,529 INFO L413 NwaCegarLoop]: 462 mSDtfsCounter, 781 mSDsluCounter, 2780 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 3242 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:40,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [781 Valid, 3242 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:13:40,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4696 states. [2023-11-21 22:13:40,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4696 to 4110. [2023-11-21 22:13:40,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4110 states, 4104 states have (on average 1.2880116959064327) internal successors, (5286), 4108 states have internal predecessors, (5286), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:40,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4110 states to 4110 states and 5291 transitions. [2023-11-21 22:13:40,785 INFO L78 Accepts]: Start accepts. Automaton has 4110 states and 5291 transitions. Word has length 154 [2023-11-21 22:13:40,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:40,786 INFO L495 AbstractCegarLoop]: Abstraction has 4110 states and 5291 transitions. [2023-11-21 22:13:40,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 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) [2023-11-21 22:13:40,786 INFO L276 IsEmpty]: Start isEmpty. Operand 4110 states and 5291 transitions. [2023-11-21 22:13:40,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-21 22:13:40,791 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:40,791 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:40,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:41,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:41,009 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:41,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:41,009 INFO L85 PathProgramCache]: Analyzing trace with hash 107068569, now seen corresponding path program 1 times [2023-11-21 22:13:41,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:41,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983275765] [2023-11-21 22:13:41,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:41,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 10 proven. 187 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 22:13:41,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:41,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983275765] [2023-11-21 22:13:41,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983275765] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:41,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532791993] [2023-11-21 22:13:41,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:41,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:41,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:41,784 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:41,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:13:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:42,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-21 22:13:42,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 10 proven. 187 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 22:13:42,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 10 proven. 187 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 22:13:42,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532791993] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:13:42,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:13:42,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2023-11-21 22:13:42,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189232424] [2023-11-21 22:13:42,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:42,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 22:13:42,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:42,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 22:13:42,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:13:42,700 INFO L87 Difference]: Start difference. First operand 4110 states and 5291 transitions. Second operand has 11 states, 11 states have (on average 22.09090909090909) internal successors, (243), 11 states have internal predecessors, (243), 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) [2023-11-21 22:13:44,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:44,152 INFO L93 Difference]: Finished difference Result 10044 states and 12918 transitions. [2023-11-21 22:13:44,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-21 22:13:44,153 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 22.09090909090909) internal successors, (243), 11 states have internal predecessors, (243), 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 249 [2023-11-21 22:13:44,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:44,167 INFO L225 Difference]: With dead ends: 10044 [2023-11-21 22:13:44,168 INFO L226 Difference]: Without dead ends: 6085 [2023-11-21 22:13:44,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-11-21 22:13:44,175 INFO L413 NwaCegarLoop]: 865 mSDtfsCounter, 1395 mSDsluCounter, 6283 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1395 SdHoareTripleChecker+Valid, 7148 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:44,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1395 Valid, 7148 Invalid, 1233 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [41 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 22:13:44,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6085 states. [2023-11-21 22:13:44,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6085 to 5192. [2023-11-21 22:13:44,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5192 states, 5186 states have (on average 1.290782876976475) internal successors, (6694), 5190 states have internal predecessors, (6694), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:44,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5192 states to 5192 states and 6699 transitions. [2023-11-21 22:13:44,462 INFO L78 Accepts]: Start accepts. Automaton has 5192 states and 6699 transitions. Word has length 249 [2023-11-21 22:13:44,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:44,465 INFO L495 AbstractCegarLoop]: Abstraction has 5192 states and 6699 transitions. [2023-11-21 22:13:44,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.09090909090909) internal successors, (243), 11 states have internal predecessors, (243), 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) [2023-11-21 22:13:44,465 INFO L276 IsEmpty]: Start isEmpty. Operand 5192 states and 6699 transitions. [2023-11-21 22:13:44,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2023-11-21 22:13:44,472 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:44,473 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:44,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:44,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-21 22:13:44,692 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:44,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:44,693 INFO L85 PathProgramCache]: Analyzing trace with hash -620002723, now seen corresponding path program 1 times [2023-11-21 22:13:44,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:44,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263648175] [2023-11-21 22:13:44,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:44,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:44,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 122 proven. 329 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-21 22:13:45,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:45,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263648175] [2023-11-21 22:13:45,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263648175] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:45,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117865461] [2023-11-21 22:13:45,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:45,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:45,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:45,948 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:45,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 22:13:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:46,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-21 22:13:46,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 15 proven. 436 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-21 22:13:46,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 15 proven. 436 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-21 22:13:47,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117865461] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:13:47,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:13:47,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2023-11-21 22:13:47,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016762550] [2023-11-21 22:13:47,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:47,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-21 22:13:47,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:47,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-21 22:13:47,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-11-21 22:13:47,381 INFO L87 Difference]: Start difference. First operand 5192 states and 6699 transitions. Second operand has 18 states, 18 states have (on average 29.27777777777778) internal successors, (527), 18 states have internal predecessors, (527), 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) [2023-11-21 22:13:49,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:49,973 INFO L93 Difference]: Finished difference Result 12479 states and 16079 transitions. [2023-11-21 22:13:49,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-21 22:13:49,974 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 29.27777777777778) internal successors, (527), 18 states have internal predecessors, (527), 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 345 [2023-11-21 22:13:49,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:49,991 INFO L225 Difference]: With dead ends: 12479 [2023-11-21 22:13:49,992 INFO L226 Difference]: Without dead ends: 7438 [2023-11-21 22:13:49,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 689 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=1789, Unknown=0, NotChecked=0, Total=2070 [2023-11-21 22:13:50,000 INFO L413 NwaCegarLoop]: 1276 mSDtfsCounter, 2876 mSDsluCounter, 14616 mSDsCounter, 0 mSdLazyCounter, 2619 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2876 SdHoareTripleChecker+Valid, 15892 SdHoareTripleChecker+Invalid, 2709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:50,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2876 Valid, 15892 Invalid, 2709 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [90 Valid, 2619 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-21 22:13:50,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7438 states. [2023-11-21 22:13:50,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7438 to 6167. [2023-11-21 22:13:50,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6167 states, 6161 states have (on average 1.2945950332738192) internal successors, (7976), 6165 states have internal predecessors, (7976), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:50,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6167 states to 6167 states and 7981 transitions. [2023-11-21 22:13:50,360 INFO L78 Accepts]: Start accepts. Automaton has 6167 states and 7981 transitions. Word has length 345 [2023-11-21 22:13:50,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:50,361 INFO L495 AbstractCegarLoop]: Abstraction has 6167 states and 7981 transitions. [2023-11-21 22:13:50,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 29.27777777777778) internal successors, (527), 18 states have internal predecessors, (527), 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) [2023-11-21 22:13:50,362 INFO L276 IsEmpty]: Start isEmpty. Operand 6167 states and 7981 transitions. [2023-11-21 22:13:50,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2023-11-21 22:13:50,372 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:50,373 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:50,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:50,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:50,588 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:50,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:50,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1505994166, now seen corresponding path program 1 times [2023-11-21 22:13:50,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:50,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358454380] [2023-11-21 22:13:50,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:50,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2023-11-21 22:13:51,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:51,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358454380] [2023-11-21 22:13:51,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358454380] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:51,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:51,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 22:13:51,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103359250] [2023-11-21 22:13:51,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:51,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:13:51,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:51,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:13:51,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:13:51,123 INFO L87 Difference]: Start difference. First operand 6167 states and 7981 transitions. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 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) [2023-11-21 22:13:51,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:51,778 INFO L93 Difference]: Finished difference Result 13159 states and 17022 transitions. [2023-11-21 22:13:51,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 22:13:51,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 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 443 [2023-11-21 22:13:51,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:51,795 INFO L225 Difference]: With dead ends: 13159 [2023-11-21 22:13:51,796 INFO L226 Difference]: Without dead ends: 7143 [2023-11-21 22:13:51,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:13:51,805 INFO L413 NwaCegarLoop]: 442 mSDtfsCounter, 437 mSDsluCounter, 1972 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 2414 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:51,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 2414 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:13:51,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7143 states. [2023-11-21 22:13:52,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7143 to 6444. [2023-11-21 22:13:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6444 states, 6438 states have (on average 1.2948120534327432) internal successors, (8336), 6442 states have internal predecessors, (8336), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:52,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6444 states to 6444 states and 8341 transitions. [2023-11-21 22:13:52,345 INFO L78 Accepts]: Start accepts. Automaton has 6444 states and 8341 transitions. Word has length 443 [2023-11-21 22:13:52,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:52,346 INFO L495 AbstractCegarLoop]: Abstraction has 6444 states and 8341 transitions. [2023-11-21 22:13:52,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 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) [2023-11-21 22:13:52,347 INFO L276 IsEmpty]: Start isEmpty. Operand 6444 states and 8341 transitions. [2023-11-21 22:13:52,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2023-11-21 22:13:52,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:52,356 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:52,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-21 22:13:52,357 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:52,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:52,358 INFO L85 PathProgramCache]: Analyzing trace with hash 704479991, now seen corresponding path program 1 times [2023-11-21 22:13:52,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:52,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055279484] [2023-11-21 22:13:52,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:52,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2023-11-21 22:13:52,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:52,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055279484] [2023-11-21 22:13:52,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055279484] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:52,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:52,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:13:52,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535046] [2023-11-21 22:13:52,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:52,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:13:52,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:52,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:13:52,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:13:52,737 INFO L87 Difference]: Start difference. First operand 6444 states and 8341 transitions. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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) [2023-11-21 22:13:53,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:53,410 INFO L93 Difference]: Finished difference Result 14953 states and 19195 transitions. [2023-11-21 22:13:53,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:13:53,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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 444 [2023-11-21 22:13:53,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:53,434 INFO L225 Difference]: With dead ends: 14953 [2023-11-21 22:13:53,434 INFO L226 Difference]: Without dead ends: 8660 [2023-11-21 22:13:53,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:13:53,443 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 321 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:53,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 1414 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:13:53,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8660 states. [2023-11-21 22:13:53,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8660 to 6969. [2023-11-21 22:13:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6969 states, 6963 states have (on average 1.290535688639954) internal successors, (8986), 6967 states have internal predecessors, (8986), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:53,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6969 states to 6969 states and 8991 transitions. [2023-11-21 22:13:53,893 INFO L78 Accepts]: Start accepts. Automaton has 6969 states and 8991 transitions. Word has length 444 [2023-11-21 22:13:53,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:53,894 INFO L495 AbstractCegarLoop]: Abstraction has 6969 states and 8991 transitions. [2023-11-21 22:13:53,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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) [2023-11-21 22:13:53,895 INFO L276 IsEmpty]: Start isEmpty. Operand 6969 states and 8991 transitions. [2023-11-21 22:13:53,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2023-11-21 22:13:53,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:53,904 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:53,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-21 22:13:53,904 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:53,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:53,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1683790893, now seen corresponding path program 1 times [2023-11-21 22:13:53,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:53,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131391180] [2023-11-21 22:13:53,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:53,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 245 proven. 0 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2023-11-21 22:13:54,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:54,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131391180] [2023-11-21 22:13:54,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131391180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:54,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:54,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:13:54,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444949477] [2023-11-21 22:13:54,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:54,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:54,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:54,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:54,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:54,139 INFO L87 Difference]: Start difference. First operand 6969 states and 8991 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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) [2023-11-21 22:13:54,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:54,780 INFO L93 Difference]: Finished difference Result 16864 states and 21850 transitions. [2023-11-21 22:13:54,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:54,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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 482 [2023-11-21 22:13:54,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:54,807 INFO L225 Difference]: With dead ends: 16864 [2023-11-21 22:13:54,807 INFO L226 Difference]: Without dead ends: 9905 [2023-11-21 22:13:54,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:54,814 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 205 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:54,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 661 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:54,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9905 states. [2023-11-21 22:13:55,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9905 to 9900. [2023-11-21 22:13:55,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9900 states, 9894 states have (on average 1.2826965837881545) internal successors, (12691), 9898 states have internal predecessors, (12691), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:55,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9900 states to 9900 states and 12696 transitions. [2023-11-21 22:13:55,348 INFO L78 Accepts]: Start accepts. Automaton has 9900 states and 12696 transitions. Word has length 482 [2023-11-21 22:13:55,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:55,349 INFO L495 AbstractCegarLoop]: Abstraction has 9900 states and 12696 transitions. [2023-11-21 22:13:55,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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) [2023-11-21 22:13:55,350 INFO L276 IsEmpty]: Start isEmpty. Operand 9900 states and 12696 transitions. [2023-11-21 22:13:55,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2023-11-21 22:13:55,359 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:55,359 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:55,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-21 22:13:55,360 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:55,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:55,361 INFO L85 PathProgramCache]: Analyzing trace with hash 742252675, now seen corresponding path program 1 times [2023-11-21 22:13:55,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:55,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925751405] [2023-11-21 22:13:55,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:55,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2023-11-21 22:13:55,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:55,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925751405] [2023-11-21 22:13:55,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925751405] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:55,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:55,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:13:55,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075151815] [2023-11-21 22:13:55,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:55,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:55,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:55,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:55,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:55,580 INFO L87 Difference]: Start difference. First operand 9900 states and 12696 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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) [2023-11-21 22:13:56,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:56,036 INFO L93 Difference]: Finished difference Result 17345 states and 22258 transitions. [2023-11-21 22:13:56,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:56,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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 483 [2023-11-21 22:13:56,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:56,059 INFO L225 Difference]: With dead ends: 17345 [2023-11-21 22:13:56,059 INFO L226 Difference]: Without dead ends: 7582 [2023-11-21 22:13:56,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:56,069 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 34 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:56,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 528 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:56,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7582 states. [2023-11-21 22:13:56,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7582 to 6747. [2023-11-21 22:13:56,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6747 states, 6741 states have (on average 1.2796321020620085) internal successors, (8626), 6745 states have internal predecessors, (8626), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:56,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6747 states to 6747 states and 8631 transitions. [2023-11-21 22:13:56,466 INFO L78 Accepts]: Start accepts. Automaton has 6747 states and 8631 transitions. Word has length 483 [2023-11-21 22:13:56,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:56,467 INFO L495 AbstractCegarLoop]: Abstraction has 6747 states and 8631 transitions. [2023-11-21 22:13:56,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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) [2023-11-21 22:13:56,468 INFO L276 IsEmpty]: Start isEmpty. Operand 6747 states and 8631 transitions. [2023-11-21 22:13:56,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2023-11-21 22:13:56,476 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:56,476 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:56,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-21 22:13:56,477 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:56,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:56,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1833906629, now seen corresponding path program 1 times [2023-11-21 22:13:56,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:56,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157810841] [2023-11-21 22:13:56,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:56,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 281 proven. 173 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2023-11-21 22:13:56,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:56,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157810841] [2023-11-21 22:13:56,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157810841] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:56,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587249352] [2023-11-21 22:13:56,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:56,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:56,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:56,832 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:56,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 22:13:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:57,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 1419 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:13:57,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:57,444 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 432 proven. 0 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2023-11-21 22:13:57,445 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:13:57,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587249352] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:57,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:13:57,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-21 22:13:57,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841058626] [2023-11-21 22:13:57,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:57,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:57,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:57,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:57,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:13:57,449 INFO L87 Difference]: Start difference. First operand 6747 states and 8631 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 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) [2023-11-21 22:13:57,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:57,996 INFO L93 Difference]: Finished difference Result 13229 states and 16956 transitions. [2023-11-21 22:13:57,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:57,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 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 484 [2023-11-21 22:13:57,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:58,011 INFO L225 Difference]: With dead ends: 13229 [2023-11-21 22:13:58,011 INFO L226 Difference]: Without dead ends: 6619 [2023-11-21 22:13:58,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:13:58,020 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 190 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:58,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 274 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:58,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6619 states. [2023-11-21 22:13:58,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6619 to 6619. [2023-11-21 22:13:58,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6619 states, 6613 states have (on average 1.2597913201270226) internal successors, (8331), 6617 states have internal predecessors, (8331), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6619 states to 6619 states and 8336 transitions. [2023-11-21 22:13:58,440 INFO L78 Accepts]: Start accepts. Automaton has 6619 states and 8336 transitions. Word has length 484 [2023-11-21 22:13:58,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:58,441 INFO L495 AbstractCegarLoop]: Abstraction has 6619 states and 8336 transitions. [2023-11-21 22:13:58,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 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) [2023-11-21 22:13:58,441 INFO L276 IsEmpty]: Start isEmpty. Operand 6619 states and 8336 transitions. [2023-11-21 22:13:58,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2023-11-21 22:13:58,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:58,450 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:58,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:58,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-21 22:13:58,664 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:58,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:58,665 INFO L85 PathProgramCache]: Analyzing trace with hash 545782202, now seen corresponding path program 1 times [2023-11-21 22:13:58,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:58,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256986800] [2023-11-21 22:13:58,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:58,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 297 proven. 173 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2023-11-21 22:13:59,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:59,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256986800] [2023-11-21 22:13:59,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256986800] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:59,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854331129] [2023-11-21 22:13:59,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:59,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:59,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:59,028 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:59,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 22:13:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:59,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:13:59,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 273 proven. 0 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2023-11-21 22:13:59,519 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:13:59,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854331129] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:59,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:13:59,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-21 22:13:59,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392013951] [2023-11-21 22:13:59,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:59,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:59,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:59,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:59,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:13:59,522 INFO L87 Difference]: Start difference. First operand 6619 states and 8336 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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) [2023-11-21 22:13:59,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:59,938 INFO L93 Difference]: Finished difference Result 11984 states and 15131 transitions. [2023-11-21 22:13:59,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:59,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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 487 [2023-11-21 22:13:59,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:59,950 INFO L225 Difference]: With dead ends: 11984 [2023-11-21 22:13:59,950 INFO L226 Difference]: Without dead ends: 5423 [2023-11-21 22:13:59,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:13:59,959 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 47 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:59,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 549 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:59,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5423 states. [2023-11-21 22:14:00,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5423 to 5259. [2023-11-21 22:14:00,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5259 states, 5253 states have (on average 1.2470968970112317) internal successors, (6551), 5257 states have internal predecessors, (6551), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:14:00,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5259 states to 5259 states and 6556 transitions. [2023-11-21 22:14:00,309 INFO L78 Accepts]: Start accepts. Automaton has 5259 states and 6556 transitions. Word has length 487 [2023-11-21 22:14:00,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:00,310 INFO L495 AbstractCegarLoop]: Abstraction has 5259 states and 6556 transitions. [2023-11-21 22:14:00,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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) [2023-11-21 22:14:00,311 INFO L276 IsEmpty]: Start isEmpty. Operand 5259 states and 6556 transitions. [2023-11-21 22:14:00,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-21 22:14:00,317 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:00,318 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:14:00,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 22:14:00,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96f0f487-a4d3-4683-9e3f-f382a9d4c0b4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:14:00,540 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:14:00,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:00,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1882033598, now seen corresponding path program 1 times [2023-11-21 22:14:00,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:00,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809316808] [2023-11-21 22:14:00,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:00,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat