./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU --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 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:00:06,582 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:00:06,699 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:00:06,704 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:00:06,705 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:00:06,734 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:00:06,735 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:00:06,735 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:00:06,736 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:00:06,736 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:00:06,738 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:00:06,739 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:00:06,739 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:00:06,740 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:00:06,740 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:00:06,741 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:00:06,741 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:00:06,742 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:00:06,742 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:00:06,743 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:00:06,743 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:00:06,744 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:00:06,744 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:00:06,745 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:00:06,745 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:00:06,745 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:00:06,746 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:00:06,746 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:00:06,747 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:00:06,747 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:00:06,747 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:00:06,748 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:00:06,748 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:00:06,748 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:00:06,749 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:00:06,749 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:00:06,749 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:00:06,750 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:00:06,750 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:00:06,750 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:00:06,751 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:00:06,751 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:00:06,751 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_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c [2024-10-31 22:00:07,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:00:07,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:00:07,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:00:07,137 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:00:07,138 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:00:07,139 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c Unable to find full path for "g++" [2024-10-31 22:00:09,232 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:00:09,448 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:00:09,451 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2024-10-31 22:00:09,463 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/data/064c16176/6d5c405d009644cf960441daf37f9e18/FLAGdc15a4115 [2024-10-31 22:00:09,822 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/data/064c16176/6d5c405d009644cf960441daf37f9e18 [2024-10-31 22:00:09,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:00:09,830 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:00:09,832 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:00:09,832 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:00:09,842 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:00:09,843 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:00:09" (1/1) ... [2024-10-31 22:00:09,844 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e996dd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:09, skipping insertion in model container [2024-10-31 22:00:09,850 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:00:09" (1/1) ... [2024-10-31 22:00:09,879 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:00:10,207 WARN L251 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_65de54e4-f596-44e5-99dc-2deedd1bda97/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2024-10-31 22:00:10,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:00:10,241 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:00:10,255 WARN L251 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_65de54e4-f596-44e5-99dc-2deedd1bda97/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2024-10-31 22:00:10,265 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:00:10,288 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:00:10,289 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:10 WrapperNode [2024-10-31 22:00:10,289 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:00:10,290 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:00:10,290 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:00:10,291 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:00:10,299 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:10" (1/1) ... [2024-10-31 22:00:10,305 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:10" (1/1) ... [2024-10-31 22:00:10,325 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2024-10-31 22:00:10,326 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:00:10,327 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:00:10,327 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:00:10,328 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:00:10,339 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:10" (1/1) ... [2024-10-31 22:00:10,339 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:10" (1/1) ... [2024-10-31 22:00:10,342 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:10" (1/1) ... [2024-10-31 22:00:10,366 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-31 22:00:10,366 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:10" (1/1) ... [2024-10-31 22:00:10,367 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:10" (1/1) ... [2024-10-31 22:00:10,372 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:10" (1/1) ... [2024-10-31 22:00:10,380 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:10" (1/1) ... [2024-10-31 22:00:10,381 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:10" (1/1) ... [2024-10-31 22:00:10,382 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:10" (1/1) ... [2024-10-31 22:00:10,385 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:00:10,388 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:00:10,389 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:00:10,389 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:00:10,390 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:10" (1/1) ... [2024-10-31 22:00:10,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:00:10,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:10,432 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:00:10,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:00:10,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:00:10,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:00:10,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:00:10,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:00:10,542 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:00:10,544 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:00:10,720 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-10-31 22:00:10,720 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:00:10,742 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:00:10,743 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 22:00:10,743 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:00:10 BoogieIcfgContainer [2024-10-31 22:00:10,743 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:00:10,751 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:00:10,752 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:00:10,762 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:00:10,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:00:09" (1/3) ... [2024-10-31 22:00:10,767 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3467fcc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:00:10, skipping insertion in model container [2024-10-31 22:00:10,767 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:10" (2/3) ... [2024-10-31 22:00:10,772 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3467fcc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:00:10, skipping insertion in model container [2024-10-31 22:00:10,772 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:00:10" (3/3) ... [2024-10-31 22:00:10,774 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.c [2024-10-31 22:00:10,814 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:00:10,815 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:00:10,899 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:00:10,907 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6741818b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:00:10,907 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 22:00:10,912 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:10,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-31 22:00:10,921 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:00:10,922 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:10,923 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:00:10,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:10,932 INFO L85 PathProgramCache]: Analyzing trace with hash -493598204, now seen corresponding path program 1 times [2024-10-31 22:00:10,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:10,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261517926] [2024-10-31 22:00:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:10,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:11,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:11,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261517926] [2024-10-31 22:00:11,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261517926] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:11,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:11,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:00:11,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184587836] [2024-10-31 22:00:11,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:11,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 22:00:11,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:11,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 22:00:11,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:00:11,223 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:11,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:00:11,240 INFO L93 Difference]: Finished difference Result 35 states and 55 transitions. [2024-10-31 22:00:11,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 22:00:11,242 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-31 22:00:11,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:00:11,251 INFO L225 Difference]: With dead ends: 35 [2024-10-31 22:00:11,251 INFO L226 Difference]: Without dead ends: 17 [2024-10-31 22:00:11,255 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:00:11,259 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:00:11,261 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:00:11,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-10-31 22:00:11,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-10-31 22:00:11,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:11,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2024-10-31 22:00:11,295 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 12 [2024-10-31 22:00:11,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:00:11,296 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2024-10-31 22:00:11,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:11,296 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2024-10-31 22:00:11,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-31 22:00:11,299 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:00:11,300 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:11,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:00:11,301 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:00:11,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:11,302 INFO L85 PathProgramCache]: Analyzing trace with hash -2059231113, now seen corresponding path program 1 times [2024-10-31 22:00:11,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:11,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479669605] [2024-10-31 22:00:11,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:11,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:11,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:11,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479669605] [2024-10-31 22:00:11,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479669605] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:11,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:11,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:00:11,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632258284] [2024-10-31 22:00:11,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:11,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:00:11,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:11,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:00:11,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:00:11,549 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:11,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:00:11,635 INFO L93 Difference]: Finished difference Result 33 states and 47 transitions. [2024-10-31 22:00:11,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:00:11,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-31 22:00:11,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:00:11,637 INFO L225 Difference]: With dead ends: 33 [2024-10-31 22:00:11,637 INFO L226 Difference]: Without dead ends: 20 [2024-10-31 22:00:11,637 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:00:11,639 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:00:11,640 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 19 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:00:11,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-31 22:00:11,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2024-10-31 22:00:11,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:11,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2024-10-31 22:00:11,649 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 12 [2024-10-31 22:00:11,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:00:11,649 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2024-10-31 22:00:11,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:11,650 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2024-10-31 22:00:11,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-31 22:00:11,654 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:00:11,654 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:11,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:00:11,655 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:00:11,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:11,655 INFO L85 PathProgramCache]: Analyzing trace with hash 573171571, now seen corresponding path program 1 times [2024-10-31 22:00:11,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:11,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597394643] [2024-10-31 22:00:11,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:11,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:00:11,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:11,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597394643] [2024-10-31 22:00:11,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597394643] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:11,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:11,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:00:11,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500704246] [2024-10-31 22:00:11,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:11,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:00:11,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:11,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:00:11,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:00:11,762 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:11,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:00:11,800 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2024-10-31 22:00:11,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:00:11,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-31 22:00:11,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:00:11,801 INFO L225 Difference]: With dead ends: 36 [2024-10-31 22:00:11,801 INFO L226 Difference]: Without dead ends: 22 [2024-10-31 22:00:11,802 INFO L431 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 [2024-10-31 22:00:11,803 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:00:11,804 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 30 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:00:11,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-31 22:00:11,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2024-10-31 22:00:11,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:11,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2024-10-31 22:00:11,808 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 15 [2024-10-31 22:00:11,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:00:11,809 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2024-10-31 22:00:11,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:11,809 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2024-10-31 22:00:11,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-31 22:00:11,812 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:00:11,812 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:11,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:00:11,813 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:00:11,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:11,813 INFO L85 PathProgramCache]: Analyzing trace with hash 630429873, now seen corresponding path program 1 times [2024-10-31 22:00:11,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:11,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136213715] [2024-10-31 22:00:11,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:11,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:00:11,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:11,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136213715] [2024-10-31 22:00:11,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136213715] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:11,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:11,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:00:11,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93721265] [2024-10-31 22:00:11,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:11,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:00:11,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:11,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:00:11,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:00:11,964 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:11,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:00:11,997 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2024-10-31 22:00:11,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:00:11,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-31 22:00:11,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:00:12,000 INFO L225 Difference]: With dead ends: 49 [2024-10-31 22:00:12,000 INFO L226 Difference]: Without dead ends: 34 [2024-10-31 22:00:12,001 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:00:12,002 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:00:12,003 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 29 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:00:12,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-31 22:00:12,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2024-10-31 22:00:12,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:12,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2024-10-31 22:00:12,011 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 15 [2024-10-31 22:00:12,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:00:12,012 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2024-10-31 22:00:12,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:12,012 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2024-10-31 22:00:12,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-31 22:00:12,013 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:00:12,013 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:12,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:00:12,014 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:00:12,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:12,014 INFO L85 PathProgramCache]: Analyzing trace with hash 630489455, now seen corresponding path program 1 times [2024-10-31 22:00:12,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:12,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727839828] [2024-10-31 22:00:12,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:12,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:12,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:12,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:12,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727839828] [2024-10-31 22:00:12,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727839828] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:12,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692887608] [2024-10-31 22:00:12,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:12,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:12,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:12,129 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:12,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:00:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:12,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 22:00:12,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:12,327 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:12,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692887608] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:12,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:12,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-10-31 22:00:12,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510205561] [2024-10-31 22:00:12,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:12,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:00:12,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:12,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:00:12,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:00:12,402 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:12,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:00:12,539 INFO L93 Difference]: Finished difference Result 78 states and 114 transitions. [2024-10-31 22:00:12,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:00:12,540 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-31 22:00:12,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:00:12,541 INFO L225 Difference]: With dead ends: 78 [2024-10-31 22:00:12,541 INFO L226 Difference]: Without dead ends: 50 [2024-10-31 22:00:12,542 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:00:12,543 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:00:12,544 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 37 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:00:12,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-31 22:00:12,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-10-31 22:00:12,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:12,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2024-10-31 22:00:12,563 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 15 [2024-10-31 22:00:12,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:00:12,563 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2024-10-31 22:00:12,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:12,564 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2024-10-31 22:00:12,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-31 22:00:12,564 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:00:12,565 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:12,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:00:12,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:12,768 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:00:12,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:12,769 INFO L85 PathProgramCache]: Analyzing trace with hash -901646477, now seen corresponding path program 2 times [2024-10-31 22:00:12,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:12,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340005284] [2024-10-31 22:00:12,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:12,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:12,984 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:12,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:12,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340005284] [2024-10-31 22:00:12,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340005284] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:12,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760243905] [2024-10-31 22:00:12,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:00:12,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:12,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:12,988 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:12,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:00:13,078 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:00:13,079 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:00:13,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 22:00:13,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:13,314 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 22:00:13,315 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 22:00:13,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760243905] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:13,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:13,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 14 [2024-10-31 22:00:13,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130959639] [2024-10-31 22:00:13,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:13,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 22:00:13,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:13,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 22:00:13,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:00:13,453 INFO L87 Difference]: Start difference. First operand 50 states and 68 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:14,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:00:14,346 INFO L93 Difference]: Finished difference Result 199 states and 283 transitions. [2024-10-31 22:00:14,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-31 22:00:14,347 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-10-31 22:00:14,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:00:14,348 INFO L225 Difference]: With dead ends: 199 [2024-10-31 22:00:14,349 INFO L226 Difference]: Without dead ends: 153 [2024-10-31 22:00:14,350 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=381, Invalid=951, Unknown=0, NotChecked=0, Total=1332 [2024-10-31 22:00:14,354 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 225 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:00:14,355 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 64 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 22:00:14,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-10-31 22:00:14,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 142. [2024-10-31 22:00:14,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.2765957446808511) internal successors, (180), 141 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:14,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 180 transitions. [2024-10-31 22:00:14,452 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 180 transitions. Word has length 24 [2024-10-31 22:00:14,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:00:14,452 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 180 transitions. [2024-10-31 22:00:14,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:14,452 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 180 transitions. [2024-10-31 22:00:14,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-31 22:00:14,458 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:00:14,458 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:14,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:00:14,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 22:00:14,661 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:00:14,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:14,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1843449907, now seen corresponding path program 1 times [2024-10-31 22:00:14,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:14,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149463652] [2024-10-31 22:00:14,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:14,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-31 22:00:14,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:14,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149463652] [2024-10-31 22:00:14,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149463652] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:14,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:14,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:00:14,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232524062] [2024-10-31 22:00:14,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:14,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:00:14,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:14,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:00:14,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:00:14,826 INFO L87 Difference]: Start difference. First operand 142 states and 180 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:14,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:00:14,875 INFO L93 Difference]: Finished difference Result 313 states and 403 transitions. [2024-10-31 22:00:14,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:00:14,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-10-31 22:00:14,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:00:14,878 INFO L225 Difference]: With dead ends: 313 [2024-10-31 22:00:14,880 INFO L226 Difference]: Without dead ends: 175 [2024-10-31 22:00:14,881 INFO L431 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 [2024-10-31 22:00:14,882 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:00:14,882 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 38 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:00:14,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-10-31 22:00:14,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 144. [2024-10-31 22:00:14,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.2657342657342658) internal successors, (181), 143 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:14,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 181 transitions. [2024-10-31 22:00:14,926 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 181 transitions. Word has length 30 [2024-10-31 22:00:14,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:00:14,926 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 181 transitions. [2024-10-31 22:00:14,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:14,927 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 181 transitions. [2024-10-31 22:00:14,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-31 22:00:14,930 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:00:14,930 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:14,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:00:14,930 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:00:14,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:14,931 INFO L85 PathProgramCache]: Analyzing trace with hash 397594855, now seen corresponding path program 1 times [2024-10-31 22:00:14,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:14,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724512581] [2024-10-31 22:00:14,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:14,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-31 22:00:15,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:15,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724512581] [2024-10-31 22:00:15,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724512581] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:15,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:15,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:00:15,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424695896] [2024-10-31 22:00:15,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:15,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:00:15,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:15,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:00:15,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:00:15,008 INFO L87 Difference]: Start difference. First operand 144 states and 181 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:15,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:00:15,041 INFO L93 Difference]: Finished difference Result 219 states and 277 transitions. [2024-10-31 22:00:15,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:00:15,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-10-31 22:00:15,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:00:15,045 INFO L225 Difference]: With dead ends: 219 [2024-10-31 22:00:15,045 INFO L226 Difference]: Without dead ends: 148 [2024-10-31 22:00:15,046 INFO L431 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 [2024-10-31 22:00:15,048 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:00:15,051 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:00:15,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-10-31 22:00:15,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2024-10-31 22:00:15,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.2448979591836735) internal successors, (183), 147 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:15,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 183 transitions. [2024-10-31 22:00:15,073 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 183 transitions. Word has length 31 [2024-10-31 22:00:15,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:00:15,073 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 183 transitions. [2024-10-31 22:00:15,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:15,074 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 183 transitions. [2024-10-31 22:00:15,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-31 22:00:15,075 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:00:15,075 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:15,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:00:15,076 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:00:15,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:15,076 INFO L85 PathProgramCache]: Analyzing trace with hash 399501479, now seen corresponding path program 1 times [2024-10-31 22:00:15,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:15,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055388627] [2024-10-31 22:00:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:15,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:15,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:15,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055388627] [2024-10-31 22:00:15,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055388627] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:15,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116494246] [2024-10-31 22:00:15,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:15,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:15,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:15,273 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:15,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:00:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:15,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 22:00:15,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:15,544 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:15,544 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:15,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116494246] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:15,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:15,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-10-31 22:00:15,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116762004] [2024-10-31 22:00:15,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:15,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-31 22:00:15,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:15,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-31 22:00:15,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2024-10-31 22:00:15,753 INFO L87 Difference]: Start difference. First operand 148 states and 183 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:16,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:00:16,113 INFO L93 Difference]: Finished difference Result 436 states and 586 transitions. [2024-10-31 22:00:16,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-31 22:00:16,113 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-10-31 22:00:16,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:00:16,116 INFO L225 Difference]: With dead ends: 436 [2024-10-31 22:00:16,116 INFO L226 Difference]: Without dead ends: 292 [2024-10-31 22:00:16,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=392, Invalid=600, Unknown=0, NotChecked=0, Total=992 [2024-10-31 22:00:16,121 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:00:16,121 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 36 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:00:16,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2024-10-31 22:00:16,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2024-10-31 22:00:16,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.2336769759450172) internal successors, (359), 291 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:16,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 359 transitions. [2024-10-31 22:00:16,176 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 359 transitions. Word has length 31 [2024-10-31 22:00:16,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:00:16,178 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 359 transitions. [2024-10-31 22:00:16,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:16,179 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 359 transitions. [2024-10-31 22:00:16,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-31 22:00:16,181 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:00:16,181 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:16,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:00:16,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-31 22:00:16,382 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:00:16,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:16,382 INFO L85 PathProgramCache]: Analyzing trace with hash -871125337, now seen corresponding path program 2 times [2024-10-31 22:00:16,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:16,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370330168] [2024-10-31 22:00:16,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:16,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:16,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:16,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370330168] [2024-10-31 22:00:16,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370330168] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:16,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433153624] [2024-10-31 22:00:16,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:00:16,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:16,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:16,913 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:16,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:00:16,995 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:00:16,995 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:00:16,997 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-31 22:00:16,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:17,483 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:18,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433153624] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:18,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:18,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2024-10-31 22:00:18,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218226642] [2024-10-31 22:00:18,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:18,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-31 22:00:18,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:18,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-31 22:00:18,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=1325, Unknown=0, NotChecked=0, Total=2352 [2024-10-31 22:00:18,215 INFO L87 Difference]: Start difference. First operand 292 states and 359 transitions. Second operand has 49 states, 49 states have (on average 3.0) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:19,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:00:19,231 INFO L93 Difference]: Finished difference Result 868 states and 1162 transitions. [2024-10-31 22:00:19,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-31 22:00:19,232 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.0) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-10-31 22:00:19,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:00:19,235 INFO L225 Difference]: With dead ends: 868 [2024-10-31 22:00:19,235 INFO L226 Difference]: Without dead ends: 580 [2024-10-31 22:00:19,238 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1552, Invalid=2480, Unknown=0, NotChecked=0, Total=4032 [2024-10-31 22:00:19,238 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 167 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:00:19,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 48 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 22:00:19,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2024-10-31 22:00:19,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2024-10-31 22:00:19,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 1.2279792746113989) internal successors, (711), 579 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:19,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 711 transitions. [2024-10-31 22:00:19,286 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 711 transitions. Word has length 55 [2024-10-31 22:00:19,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:00:19,286 INFO L471 AbstractCegarLoop]: Abstraction has 580 states and 711 transitions. [2024-10-31 22:00:19,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.0) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:19,287 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 711 transitions. [2024-10-31 22:00:19,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-10-31 22:00:19,289 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:00:19,289 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:19,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-31 22:00:19,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 22:00:19,491 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:00:19,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:19,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1917139623, now seen corresponding path program 3 times [2024-10-31 22:00:19,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:19,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833762516] [2024-10-31 22:00:19,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:19,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:20,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:20,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:20,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833762516] [2024-10-31 22:00:20,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833762516] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:20,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999728356] [2024-10-31 22:00:20,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:00:20,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:20,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:20,791 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:20,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:00:20,860 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-31 22:00:20,861 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:00:20,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-31 22:00:20,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2024-10-31 22:00:21,507 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:00:21,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999728356] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:21,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:00:21,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [33] total 40 [2024-10-31 22:00:21,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977016470] [2024-10-31 22:00:21,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:21,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:00:21,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:21,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:00:21,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=1012, Unknown=0, NotChecked=0, Total=1560 [2024-10-31 22:00:21,510 INFO L87 Difference]: Start difference. First operand 580 states and 711 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:21,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:00:21,644 INFO L93 Difference]: Finished difference Result 867 states and 1064 transitions. [2024-10-31 22:00:21,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:00:21,645 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2024-10-31 22:00:21,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:00:21,648 INFO L225 Difference]: With dead ends: 867 [2024-10-31 22:00:21,649 INFO L226 Difference]: Without dead ends: 865 [2024-10-31 22:00:21,649 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=548, Invalid=1012, Unknown=0, NotChecked=0, Total=1560 [2024-10-31 22:00:21,650 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:00:21,650 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:00:21,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2024-10-31 22:00:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 865. [2024-10-31 22:00:21,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 1.2268518518518519) internal successors, (1060), 864 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:21,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1060 transitions. [2024-10-31 22:00:21,716 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1060 transitions. Word has length 103 [2024-10-31 22:00:21,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:00:21,717 INFO L471 AbstractCegarLoop]: Abstraction has 865 states and 1060 transitions. [2024-10-31 22:00:21,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:21,717 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1060 transitions. [2024-10-31 22:00:21,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-10-31 22:00:21,718 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:00:21,719 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:21,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-31 22:00:21,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:21,923 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:00:21,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:21,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1743203367, now seen corresponding path program 1 times [2024-10-31 22:00:21,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:21,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527859901] [2024-10-31 22:00:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:21,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:23,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:23,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527859901] [2024-10-31 22:00:23,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527859901] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:23,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489718923] [2024-10-31 22:00:23,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:23,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:23,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:23,276 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:23,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:00:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:23,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-31 22:00:23,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:24,623 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:26,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489718923] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:26,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:26,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 96 [2024-10-31 22:00:26,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390349807] [2024-10-31 22:00:26,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:26,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-10-31 22:00:26,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:26,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-10-31 22:00:26,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4099, Invalid=5213, Unknown=0, NotChecked=0, Total=9312 [2024-10-31 22:00:26,378 INFO L87 Difference]: Start difference. First operand 865 states and 1060 transitions. Second operand has 97 states, 97 states have (on average 3.0) internal successors, (291), 96 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:28,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:00:28,633 INFO L93 Difference]: Finished difference Result 2323 states and 3132 transitions. [2024-10-31 22:00:28,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-10-31 22:00:28,634 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.0) internal successors, (291), 96 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2024-10-31 22:00:28,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:00:28,641 INFO L225 Difference]: With dead ends: 2323 [2024-10-31 22:00:28,641 INFO L226 Difference]: Without dead ends: 1729 [2024-10-31 22:00:28,646 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5825 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6176, Invalid=10080, Unknown=0, NotChecked=0, Total=16256 [2024-10-31 22:00:28,646 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 414 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 22:00:28,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 36 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 22:00:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2024-10-31 22:00:28,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1729. [2024-10-31 22:00:28,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 1.224537037037037) internal successors, (2116), 1728 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:28,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2116 transitions. [2024-10-31 22:00:28,764 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2116 transitions. Word has length 103 [2024-10-31 22:00:28,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:00:28,764 INFO L471 AbstractCegarLoop]: Abstraction has 1729 states and 2116 transitions. [2024-10-31 22:00:28,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.0) internal successors, (291), 96 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:28,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2116 transitions. [2024-10-31 22:00:28,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2024-10-31 22:00:28,768 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:00:28,769 INFO L215 NwaCegarLoop]: trace histogram [62, 62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:28,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:00:28,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:28,973 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:00:28,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:28,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1216304089, now seen corresponding path program 2 times [2024-10-31 22:00:28,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:28,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320749970] [2024-10-31 22:00:28,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:28,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:32,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:32,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320749970] [2024-10-31 22:00:32,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320749970] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:32,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649676950] [2024-10-31 22:00:32,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:00:32,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:32,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:32,698 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:32,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65de54e4-f596-44e5-99dc-2deedd1bda97/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:00:32,810 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:00:32,811 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:00:32,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:00:32,820 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 305 refuted. 0 times theorem prover too weak. 5430 trivial. 0 not checked. [2024-10-31 22:00:33,611 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:34,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 305 refuted. 0 times theorem prover too weak. 5430 trivial. 0 not checked. [2024-10-31 22:00:34,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649676950] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:34,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:34,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 6, 6] total 74 [2024-10-31 22:00:34,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932487332] [2024-10-31 22:00:34,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:34,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-10-31 22:00:34,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:34,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-10-31 22:00:34,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2369, Invalid=3181, Unknown=0, NotChecked=0, Total=5550 [2024-10-31 22:00:34,214 INFO L87 Difference]: Start difference. First operand 1729 states and 2116 transitions. Second operand has 75 states, 75 states have (on average 3.0) internal successors, (225), 74 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)