./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.02.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl --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 5d56dff15b0de2a89db18b71695d59ff3710bc2ebb344dc571e9d71343d9d530 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:26:57,774 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:26:57,889 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:26:57,897 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:26:57,898 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:26:57,934 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:26:57,936 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:26:57,937 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:26:57,938 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:26:57,943 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:26:57,945 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:26:57,946 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:26:57,946 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:26:57,948 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:26:57,949 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:26:57,949 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:26:57,949 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:26:57,950 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:26:57,950 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:26:57,951 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:26:57,951 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:26:57,952 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:26:57,953 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:26:57,953 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:26:57,953 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:26:57,954 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:26:57,955 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:26:57,956 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:26:57,971 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:26:57,972 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:26:57,973 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:26:57,974 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:26:57,974 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:26:57,974 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:26:57,975 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:26:57,975 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:26:57,975 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:26:57,976 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:26:57,976 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:26:57,976 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_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5d56dff15b0de2a89db18b71695d59ff3710bc2ebb344dc571e9d71343d9d530 [2023-11-12 02:26:58,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:26:58,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:26:58,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:26:58,310 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:26:58,311 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:26:58,312 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.02.cil-2.c [2023-11-12 02:27:01,552 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:27:02,310 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:27:02,311 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/sv-benchmarks/c/combinations/Problem05_label45+token_ring.02.cil-2.c [2023-11-12 02:27:02,368 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/data/74c06f206/5486b641986e4c42946c9df337484c8a/FLAG18347b458 [2023-11-12 02:27:02,386 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/data/74c06f206/5486b641986e4c42946c9df337484c8a [2023-11-12 02:27:02,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:27:02,395 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:27:02,398 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:27:02,398 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:27:02,404 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:27:02,405 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:27:02" (1/1) ... [2023-11-12 02:27:02,406 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22dd2256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:02, skipping insertion in model container [2023-11-12 02:27:02,406 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:27:02" (1/1) ... [2023-11-12 02:27:02,723 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:27:05,161 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/sv-benchmarks/c/combinations/Problem05_label45+token_ring.02.cil-2.c[380323,380336] [2023-11-12 02:27:05,194 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/sv-benchmarks/c/combinations/Problem05_label45+token_ring.02.cil-2.c[383339,383352] [2023-11-12 02:27:05,383 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:27:05,400 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:27:06,690 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/sv-benchmarks/c/combinations/Problem05_label45+token_ring.02.cil-2.c[380323,380336] [2023-11-12 02:27:06,698 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/sv-benchmarks/c/combinations/Problem05_label45+token_ring.02.cil-2.c[383339,383352] [2023-11-12 02:27:06,723 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:27:06,803 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:27:06,804 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:06 WrapperNode [2023-11-12 02:27:06,804 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:27:06,805 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:27:06,806 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:27:06,806 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:27:06,815 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:06" (1/1) ... [2023-11-12 02:27:06,909 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:06" (1/1) ... [2023-11-12 02:27:07,357 INFO L138 Inliner]: procedures = 48, calls = 48, calls flagged for inlining = 25, calls inlined = 25, statements flattened = 12634 [2023-11-12 02:27:07,359 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:27:07,359 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:27:07,360 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:27:07,360 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:27:07,370 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:06" (1/1) ... [2023-11-12 02:27:07,370 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:06" (1/1) ... [2023-11-12 02:27:07,431 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:06" (1/1) ... [2023-11-12 02:27:07,442 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:06" (1/1) ... [2023-11-12 02:27:07,768 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:06" (1/1) ... [2023-11-12 02:27:07,897 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:06" (1/1) ... [2023-11-12 02:27:07,915 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:06" (1/1) ... [2023-11-12 02:27:07,934 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:06" (1/1) ... [2023-11-12 02:27:07,986 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:27:07,987 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:27:07,987 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:27:07,987 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:27:07,988 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:06" (1/1) ... [2023-11-12 02:27:07,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:27:08,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:08,023 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:27:08,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:27:08,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:27:08,066 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-12 02:27:08,067 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-12 02:27:08,067 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-12 02:27:08,067 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-12 02:27:08,068 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-12 02:27:08,068 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-12 02:27:08,068 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-12 02:27:08,068 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-12 02:27:08,070 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-12 02:27:08,071 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-12 02:27:08,071 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-12 02:27:08,071 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-12 02:27:08,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:27:08,071 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-12 02:27:08,071 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-12 02:27:08,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:27:08,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:27:08,185 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:27:08,187 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:27:17,645 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:27:17,680 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:27:17,680 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-12 02:27:17,687 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:27:17 BoogieIcfgContainer [2023-11-12 02:27:17,687 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:27:17,691 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:27:17,692 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:27:17,695 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:27:17,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:27:02" (1/3) ... [2023-11-12 02:27:17,698 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be2751b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:27:17, skipping insertion in model container [2023-11-12 02:27:17,698 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:06" (2/3) ... [2023-11-12 02:27:17,699 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be2751b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:27:17, skipping insertion in model container [2023-11-12 02:27:17,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:27:17" (3/3) ... [2023-11-12 02:27:17,702 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.02.cil-2.c [2023-11-12 02:27:17,723 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:27:17,723 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 02:27:17,926 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:27:17,933 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2039bce1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:27:17,933 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:27:17,947 INFO L276 IsEmpty]: Start isEmpty. Operand has 2326 states, 2298 states have (on average 1.8563968668407311) internal successors, (4266), 2303 states have internal predecessors, (4266), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-12 02:27:17,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 02:27:17,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:17,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:17,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:17,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:17,972 INFO L85 PathProgramCache]: Analyzing trace with hash 931332088, now seen corresponding path program 1 times [2023-11-12 02:27:17,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:17,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090327869] [2023-11-12 02:27:17,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:17,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:18,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:27:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:18,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:27:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:18,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-12 02:27:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:18,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-12 02:27:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:18,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-12 02:27:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:18,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:18,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090327869] [2023-11-12 02:27:18,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090327869] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:18,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:18,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:27:18,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710292740] [2023-11-12 02:27:18,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:18,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:27:18,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:18,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:27:18,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:27:18,699 INFO L87 Difference]: Start difference. First operand has 2326 states, 2298 states have (on average 1.8563968668407311) internal successors, (4266), 2303 states have internal predecessors, (4266), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:27:19,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:19,936 INFO L93 Difference]: Finished difference Result 4833 states and 8896 transitions. [2023-11-12 02:27:19,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:27:19,939 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2023-11-12 02:27:19,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:19,979 INFO L225 Difference]: With dead ends: 4833 [2023-11-12 02:27:19,979 INFO L226 Difference]: Without dead ends: 2447 [2023-11-12 02:27:19,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:27:19,999 INFO L413 NwaCegarLoop]: 4156 mSDtfsCounter, 4455 mSDsluCounter, 12455 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4464 SdHoareTripleChecker+Valid, 16611 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:20,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4464 Valid, 16611 Invalid, 667 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [76 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 02:27:20,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2023-11-12 02:27:20,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2382. [2023-11-12 02:27:20,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2338 states have (on average 1.8319076133447392) internal successors, (4283), 2342 states have internal predecessors, (4283), 29 states have call successors, (29), 13 states have call predecessors, (29), 13 states have return successors, (30), 27 states have call predecessors, (30), 27 states have call successors, (30) [2023-11-12 02:27:20,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 4342 transitions. [2023-11-12 02:27:20,170 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 4342 transitions. Word has length 69 [2023-11-12 02:27:20,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:20,170 INFO L495 AbstractCegarLoop]: Abstraction has 2382 states and 4342 transitions. [2023-11-12 02:27:20,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:27:20,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 4342 transitions. [2023-11-12 02:27:20,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 02:27:20,175 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:20,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:20,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:27:20,176 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:20,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:20,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1034046452, now seen corresponding path program 1 times [2023-11-12 02:27:20,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:20,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818327415] [2023-11-12 02:27:20,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:20,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:20,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:27:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:20,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:27:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:20,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-12 02:27:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:20,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-12 02:27:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:20,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-12 02:27:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:20,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:20,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:20,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818327415] [2023-11-12 02:27:20,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818327415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:20,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:20,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:27:20,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746783615] [2023-11-12 02:27:20,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:20,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:27:20,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:20,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:27:20,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:27:20,380 INFO L87 Difference]: Start difference. First operand 2382 states and 4342 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:27:21,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:21,762 INFO L93 Difference]: Finished difference Result 2853 states and 5045 transitions. [2023-11-12 02:27:21,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:27:21,763 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2023-11-12 02:27:21,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:21,782 INFO L225 Difference]: With dead ends: 2853 [2023-11-12 02:27:21,782 INFO L226 Difference]: Without dead ends: 2602 [2023-11-12 02:27:21,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:27:21,786 INFO L413 NwaCegarLoop]: 4178 mSDtfsCounter, 4381 mSDsluCounter, 16537 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4390 SdHoareTripleChecker+Valid, 20715 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:21,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4390 Valid, 20715 Invalid, 1014 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [45 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:27:21,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2023-11-12 02:27:21,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 2499. [2023-11-12 02:27:21,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 2437 states have (on average 1.816988100123102) internal successors, (4428), 2442 states have internal predecessors, (4428), 40 states have call successors, (40), 19 states have call predecessors, (40), 20 states have return successors, (43), 39 states have call predecessors, (43), 38 states have call successors, (43) [2023-11-12 02:27:21,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 4511 transitions. [2023-11-12 02:27:21,886 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 4511 transitions. Word has length 69 [2023-11-12 02:27:21,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:21,886 INFO L495 AbstractCegarLoop]: Abstraction has 2499 states and 4511 transitions. [2023-11-12 02:27:21,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:27:21,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 4511 transitions. [2023-11-12 02:27:21,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 02:27:21,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:21,891 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:21,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:27:21,892 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:21,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:21,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1874135434, now seen corresponding path program 1 times [2023-11-12 02:27:21,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:21,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785255868] [2023-11-12 02:27:21,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:21,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:21,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:27:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:21,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:27:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:22,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-12 02:27:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:22,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-12 02:27:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:22,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-12 02:27:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:22,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:22,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785255868] [2023-11-12 02:27:22,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785255868] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:22,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:22,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:27:22,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425594283] [2023-11-12 02:27:22,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:22,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:27:22,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:22,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:27:22,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:27:22,049 INFO L87 Difference]: Start difference. First operand 2499 states and 4511 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:27:23,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:23,339 INFO L93 Difference]: Finished difference Result 3263 states and 5648 transitions. [2023-11-12 02:27:23,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:27:23,340 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2023-11-12 02:27:23,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:23,359 INFO L225 Difference]: With dead ends: 3263 [2023-11-12 02:27:23,360 INFO L226 Difference]: Without dead ends: 2895 [2023-11-12 02:27:23,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:27:23,364 INFO L413 NwaCegarLoop]: 4096 mSDtfsCounter, 4421 mSDsluCounter, 16311 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4430 SdHoareTripleChecker+Valid, 20407 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:23,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4430 Valid, 20407 Invalid, 872 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [67 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:27:23,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2023-11-12 02:27:23,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 2734. [2023-11-12 02:27:23,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2734 states, 2636 states have (on average 1.7902124430955995) internal successors, (4719), 2643 states have internal predecessors, (4719), 62 states have call successors, (62), 31 states have call predecessors, (62), 34 states have return successors, (73), 63 states have call predecessors, (73), 60 states have call successors, (73) [2023-11-12 02:27:23,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 4854 transitions. [2023-11-12 02:27:23,476 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 4854 transitions. Word has length 69 [2023-11-12 02:27:23,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:23,476 INFO L495 AbstractCegarLoop]: Abstraction has 2734 states and 4854 transitions. [2023-11-12 02:27:23,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:27:23,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 4854 transitions. [2023-11-12 02:27:23,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 02:27:23,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:23,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:23,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:27:23,481 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:23,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:23,482 INFO L85 PathProgramCache]: Analyzing trace with hash -998116428, now seen corresponding path program 1 times [2023-11-12 02:27:23,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:23,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299040010] [2023-11-12 02:27:23,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:23,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:23,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:27:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:23,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:27:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:23,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-12 02:27:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:23,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-12 02:27:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:23,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-12 02:27:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:23,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:23,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299040010] [2023-11-12 02:27:23,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299040010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:23,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:23,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:27:23,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618387168] [2023-11-12 02:27:23,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:23,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:27:23,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:23,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:27:23,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:27:23,650 INFO L87 Difference]: Start difference. First operand 2734 states and 4854 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:27:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:25,094 INFO L93 Difference]: Finished difference Result 4155 states and 6957 transitions. [2023-11-12 02:27:25,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:27:25,095 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2023-11-12 02:27:25,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:25,122 INFO L225 Difference]: With dead ends: 4155 [2023-11-12 02:27:25,122 INFO L226 Difference]: Without dead ends: 3552 [2023-11-12 02:27:25,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:27:25,140 INFO L413 NwaCegarLoop]: 4173 mSDtfsCounter, 4391 mSDsluCounter, 16526 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4399 SdHoareTripleChecker+Valid, 20699 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:25,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4399 Valid, 20699 Invalid, 1107 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [49 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 02:27:25,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2023-11-12 02:27:25,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 3158. [2023-11-12 02:27:25,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3158 states, 2992 states have (on average 1.7483288770053476) internal successors, (5231), 3003 states have internal predecessors, (5231), 102 states have call successors, (102), 55 states have call predecessors, (102), 62 states have return successors, (135), 107 states have call predecessors, (135), 100 states have call successors, (135) [2023-11-12 02:27:25,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3158 states to 3158 states and 5468 transitions. [2023-11-12 02:27:25,315 INFO L78 Accepts]: Start accepts. Automaton has 3158 states and 5468 transitions. Word has length 69 [2023-11-12 02:27:25,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:25,316 INFO L495 AbstractCegarLoop]: Abstraction has 3158 states and 5468 transitions. [2023-11-12 02:27:25,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:27:25,316 INFO L276 IsEmpty]: Start isEmpty. Operand 3158 states and 5468 transitions. [2023-11-12 02:27:25,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 02:27:25,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:25,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:25,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:27:25,319 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:25,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:25,320 INFO L85 PathProgramCache]: Analyzing trace with hash 540223602, now seen corresponding path program 1 times [2023-11-12 02:27:25,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:25,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864188853] [2023-11-12 02:27:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:25,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:25,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:27:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:25,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:27:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:25,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-12 02:27:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:25,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-12 02:27:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:25,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-12 02:27:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:25,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:25,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:25,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864188853] [2023-11-12 02:27:25,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864188853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:25,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:25,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:27:25,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929692427] [2023-11-12 02:27:25,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:25,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:27:25,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:25,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:27:25,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:27:25,514 INFO L87 Difference]: Start difference. First operand 3158 states and 5468 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:27:26,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:26,978 INFO L93 Difference]: Finished difference Result 5589 states and 9033 transitions. [2023-11-12 02:27:26,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:27:26,979 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2023-11-12 02:27:26,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:27,012 INFO L225 Difference]: With dead ends: 5589 [2023-11-12 02:27:27,012 INFO L226 Difference]: Without dead ends: 4562 [2023-11-12 02:27:27,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:27:27,022 INFO L413 NwaCegarLoop]: 4174 mSDtfsCounter, 4393 mSDsluCounter, 16529 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4405 SdHoareTripleChecker+Valid, 20703 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:27,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4405 Valid, 20703 Invalid, 968 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [51 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:27:27,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4562 states. [2023-11-12 02:27:27,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4562 to 4039. [2023-11-12 02:27:27,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4039 states, 3741 states have (on average 1.690724405239241) internal successors, (6325), 3760 states have internal predecessors, (6325), 178 states have call successors, (178), 103 states have call predecessors, (178), 118 states have return successors, (273), 191 states have call predecessors, (273), 176 states have call successors, (273) [2023-11-12 02:27:27,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4039 states to 4039 states and 6776 transitions. [2023-11-12 02:27:27,294 INFO L78 Accepts]: Start accepts. Automaton has 4039 states and 6776 transitions. Word has length 69 [2023-11-12 02:27:27,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:27,295 INFO L495 AbstractCegarLoop]: Abstraction has 4039 states and 6776 transitions. [2023-11-12 02:27:27,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:27:27,296 INFO L276 IsEmpty]: Start isEmpty. Operand 4039 states and 6776 transitions. [2023-11-12 02:27:27,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 02:27:27,300 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:27,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:27,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:27:27,301 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:27,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:27,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1488362508, now seen corresponding path program 1 times [2023-11-12 02:27:27,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:27,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403876526] [2023-11-12 02:27:27,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:27,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:27,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:27,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:27:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:27,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:27:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:27,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-12 02:27:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:27,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-12 02:27:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:27,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-12 02:27:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:27,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:27,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403876526] [2023-11-12 02:27:27,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403876526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:27,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:27,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:27:27,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853822983] [2023-11-12 02:27:27,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:27,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:27:27,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:27,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:27:27,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:27:27,468 INFO L87 Difference]: Start difference. First operand 4039 states and 6776 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:27:28,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:28,759 INFO L93 Difference]: Finished difference Result 7501 states and 11889 transitions. [2023-11-12 02:27:28,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:27:28,760 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2023-11-12 02:27:28,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:28,799 INFO L225 Difference]: With dead ends: 7501 [2023-11-12 02:27:28,799 INFO L226 Difference]: Without dead ends: 5594 [2023-11-12 02:27:28,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:27:28,810 INFO L413 NwaCegarLoop]: 4189 mSDtfsCounter, 4523 mSDsluCounter, 12287 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4548 SdHoareTripleChecker+Valid, 16476 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:28,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4548 Valid, 16476 Invalid, 854 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [71 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:27:28,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5594 states. [2023-11-12 02:27:29,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5594 to 5007. [2023-11-12 02:27:29,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5007 states, 4551 states have (on average 1.6381015161502965) internal successors, (7455), 4587 states have internal predecessors, (7455), 274 states have call successors, (274), 157 states have call predecessors, (274), 180 states have return successors, (397), 278 states have call predecessors, (397), 272 states have call successors, (397) [2023-11-12 02:27:29,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5007 states to 5007 states and 8126 transitions. [2023-11-12 02:27:29,147 INFO L78 Accepts]: Start accepts. Automaton has 5007 states and 8126 transitions. Word has length 69 [2023-11-12 02:27:29,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:29,147 INFO L495 AbstractCegarLoop]: Abstraction has 5007 states and 8126 transitions. [2023-11-12 02:27:29,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 02:27:29,149 INFO L276 IsEmpty]: Start isEmpty. Operand 5007 states and 8126 transitions. [2023-11-12 02:27:29,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-12 02:27:29,167 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:29,167 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:29,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:27:29,168 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:29,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:29,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1912897413, now seen corresponding path program 1 times [2023-11-12 02:27:29,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:29,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708452346] [2023-11-12 02:27:29,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:29,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:29,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:27:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:29,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:27:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:29,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-12 02:27:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:29,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-12 02:27:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:29,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-12 02:27:29,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:29,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-12 02:27:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:29,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-12 02:27:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:29,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2023-11-12 02:27:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 02:27:29,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:29,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708452346] [2023-11-12 02:27:29,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708452346] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:29,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206568755] [2023-11-12 02:27:29,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:29,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:29,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:29,519 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:29,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:27:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:29,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:27:29,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:29,781 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 02:27:29,782 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:29,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206568755] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:29,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:27:29,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-12 02:27:29,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130269187] [2023-11-12 02:27:29,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:29,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:29,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:29,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:29,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:27:29,789 INFO L87 Difference]: Start difference. First operand 5007 states and 8126 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 02:27:30,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:30,089 INFO L93 Difference]: Finished difference Result 10614 states and 16300 transitions. [2023-11-12 02:27:30,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:27:30,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 112 [2023-11-12 02:27:30,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:30,156 INFO L225 Difference]: With dead ends: 10614 [2023-11-12 02:27:30,156 INFO L226 Difference]: Without dead ends: 7739 [2023-11-12 02:27:30,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:27:30,169 INFO L413 NwaCegarLoop]: 4154 mSDtfsCounter, 4113 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4113 SdHoareTripleChecker+Valid, 4328 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:30,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4113 Valid, 4328 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:27:30,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7739 states. [2023-11-12 02:27:30,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7739 to 7683. [2023-11-12 02:27:30,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7683 states, 6813 states have (on average 1.5708204902392484) internal successors, (10702), 6882 states have internal predecessors, (10702), 512 states have call successors, (512), 309 states have call predecessors, (512), 356 states have return successors, (745), 507 states have call predecessors, (745), 510 states have call successors, (745) [2023-11-12 02:27:30,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 11959 transitions. [2023-11-12 02:27:30,560 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 11959 transitions. Word has length 112 [2023-11-12 02:27:30,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:30,561 INFO L495 AbstractCegarLoop]: Abstraction has 7683 states and 11959 transitions. [2023-11-12 02:27:30,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 02:27:30,561 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 11959 transitions. [2023-11-12 02:27:30,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-12 02:27:30,574 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:30,574 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:30,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:27:30,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:27:30,781 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:30,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:30,781 INFO L85 PathProgramCache]: Analyzing trace with hash 482611867, now seen corresponding path program 1 times [2023-11-12 02:27:30,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:30,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534349043] [2023-11-12 02:27:30,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:30,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:30,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:27:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:30,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:27:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:30,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-12 02:27:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:30,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-12 02:27:30,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:30,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-12 02:27:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:30,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-12 02:27:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:30,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-12 02:27:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:30,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2023-11-12 02:27:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 02:27:30,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:30,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534349043] [2023-11-12 02:27:30,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534349043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:30,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90862720] [2023-11-12 02:27:30,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:30,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:30,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:30,932 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:30,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:27:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:31,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:27:31,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-12 02:27:31,099 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:31,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90862720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:31,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:27:31,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-11-12 02:27:31,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981112166] [2023-11-12 02:27:31,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:31,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:31,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:31,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:31,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:27:31,102 INFO L87 Difference]: Start difference. First operand 7683 states and 11959 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 02:27:31,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:31,730 INFO L93 Difference]: Finished difference Result 18369 states and 27593 transitions. [2023-11-12 02:27:31,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:27:31,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 112 [2023-11-12 02:27:31,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:31,792 INFO L225 Difference]: With dead ends: 18369 [2023-11-12 02:27:31,792 INFO L226 Difference]: Without dead ends: 12819 [2023-11-12 02:27:31,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:27:31,812 INFO L413 NwaCegarLoop]: 4317 mSDtfsCounter, 156 mSDsluCounter, 4153 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 8470 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:31,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 8470 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:27:31,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12819 states. [2023-11-12 02:27:32,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12819 to 12819. [2023-11-12 02:27:32,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12819 states, 11136 states have (on average 1.5079920977011494) internal successors, (16793), 11254 states have internal predecessors, (16793), 977 states have call successors, (977), 609 states have call predecessors, (977), 704 states have return successors, (1596), 987 states have call predecessors, (1596), 975 states have call successors, (1596) [2023-11-12 02:27:32,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12819 states to 12819 states and 19366 transitions. [2023-11-12 02:27:32,488 INFO L78 Accepts]: Start accepts. Automaton has 12819 states and 19366 transitions. Word has length 112 [2023-11-12 02:27:32,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:32,489 INFO L495 AbstractCegarLoop]: Abstraction has 12819 states and 19366 transitions. [2023-11-12 02:27:32,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 02:27:32,489 INFO L276 IsEmpty]: Start isEmpty. Operand 12819 states and 19366 transitions. [2023-11-12 02:27:32,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-12 02:27:32,528 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:32,528 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:32,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:32,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 02:27:32,735 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:32,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:32,736 INFO L85 PathProgramCache]: Analyzing trace with hash 918900513, now seen corresponding path program 1 times [2023-11-12 02:27:32,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:32,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788785062] [2023-11-12 02:27:32,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:32,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:32,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:27:32,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:32,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:27:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:32,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-12 02:27:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:32,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-12 02:27:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:32,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-12 02:27:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:32,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-12 02:27:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:32,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-12 02:27:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:32,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-11-12 02:27:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:32,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-12 02:27:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:33,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-11-12 02:27:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:33,040 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-12 02:27:33,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:33,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788785062] [2023-11-12 02:27:33,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788785062] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:33,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841840228] [2023-11-12 02:27:33,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:33,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:33,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:33,043 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:33,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:27:33,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:33,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:27:33,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-12 02:27:33,360 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:33,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841840228] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:33,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:27:33,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-12 02:27:33,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647203595] [2023-11-12 02:27:33,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:33,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:33,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:33,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:33,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:27:33,363 INFO L87 Difference]: Start difference. First operand 12819 states and 19366 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-12 02:27:34,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:34,305 INFO L93 Difference]: Finished difference Result 33751 states and 49843 transitions. [2023-11-12 02:27:34,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:27:34,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 145 [2023-11-12 02:27:34,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:34,410 INFO L225 Difference]: With dead ends: 33751 [2023-11-12 02:27:34,410 INFO L226 Difference]: Without dead ends: 23069 [2023-11-12 02:27:34,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:27:34,455 INFO L413 NwaCegarLoop]: 4175 mSDtfsCounter, 4070 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4070 SdHoareTripleChecker+Valid, 4349 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:34,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4070 Valid, 4349 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:27:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23069 states. [2023-11-12 02:27:35,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23069 to 22857. [2023-11-12 02:27:35,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22857 states, 19594 states have (on average 1.4674390119424314) internal successors, (28753), 19826 states have internal predecessors, (28753), 1871 states have call successors, (1871), 1199 states have call predecessors, (1871), 1390 states have return successors, (3038), 1863 states have call predecessors, (3038), 1869 states have call successors, (3038) [2023-11-12 02:27:36,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22857 states to 22857 states and 33662 transitions. [2023-11-12 02:27:36,033 INFO L78 Accepts]: Start accepts. Automaton has 22857 states and 33662 transitions. Word has length 145 [2023-11-12 02:27:36,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:36,034 INFO L495 AbstractCegarLoop]: Abstraction has 22857 states and 33662 transitions. [2023-11-12 02:27:36,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-12 02:27:36,034 INFO L276 IsEmpty]: Start isEmpty. Operand 22857 states and 33662 transitions. [2023-11-12 02:27:36,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-12 02:27:36,115 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:36,115 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:36,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-12 02:27:36,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:36,323 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:36,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:36,323 INFO L85 PathProgramCache]: Analyzing trace with hash -714352319, now seen corresponding path program 1 times [2023-11-12 02:27:36,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:36,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133130068] [2023-11-12 02:27:36,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:36,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:36,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:27:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:36,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:27:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:36,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-12 02:27:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:36,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-12 02:27:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:36,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-12 02:27:36,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:36,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-11-12 02:27:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:36,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-11-12 02:27:36,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:36,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-12 02:27:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:36,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-11-12 02:27:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:36,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-12 02:27:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:36,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2023-11-12 02:27:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-11-12 02:27:36,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:36,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133130068] [2023-11-12 02:27:36,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133130068] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:36,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922291345] [2023-11-12 02:27:36,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:36,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:36,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:36,646 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:36,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:27:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:36,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:27:36,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 02:27:36,933 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:36,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922291345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:36,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:27:36,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-11-12 02:27:36,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846689328] [2023-11-12 02:27:36,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:36,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:36,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:36,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:36,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:27:36,937 INFO L87 Difference]: Start difference. First operand 22857 states and 33662 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-12 02:27:38,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:38,044 INFO L93 Difference]: Finished difference Result 45933 states and 67620 transitions. [2023-11-12 02:27:38,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:27:38,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 163 [2023-11-12 02:27:38,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:38,154 INFO L225 Difference]: With dead ends: 45933 [2023-11-12 02:27:38,154 INFO L226 Difference]: Without dead ends: 25211 [2023-11-12 02:27:38,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:27:38,217 INFO L413 NwaCegarLoop]: 4151 mSDtfsCounter, 4088 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4088 SdHoareTripleChecker+Valid, 4185 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:38,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4088 Valid, 4185 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:27:38,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25211 states. [2023-11-12 02:27:39,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25211 to 25211. [2023-11-12 02:27:39,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25211 states, 21736 states have (on average 1.4132775119617225) internal successors, (30719), 21968 states have internal predecessors, (30719), 1925 states have call successors, (1925), 1357 states have call predecessors, (1925), 1548 states have return successors, (3106), 1917 states have call predecessors, (3106), 1923 states have call successors, (3106) [2023-11-12 02:27:39,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25211 states to 25211 states and 35750 transitions. [2023-11-12 02:27:39,520 INFO L78 Accepts]: Start accepts. Automaton has 25211 states and 35750 transitions. Word has length 163 [2023-11-12 02:27:39,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:39,520 INFO L495 AbstractCegarLoop]: Abstraction has 25211 states and 35750 transitions. [2023-11-12 02:27:39,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-12 02:27:39,521 INFO L276 IsEmpty]: Start isEmpty. Operand 25211 states and 35750 transitions. [2023-11-12 02:27:39,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-12 02:27:39,582 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:39,582 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:39,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:39,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:27:39,788 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:39,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:39,788 INFO L85 PathProgramCache]: Analyzing trace with hash -537824700, now seen corresponding path program 1 times [2023-11-12 02:27:39,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:39,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253840516] [2023-11-12 02:27:39,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:39,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:39,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:27:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:39,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:27:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:39,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-12 02:27:39,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:39,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-12 02:27:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:39,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-12 02:27:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:39,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-11-12 02:27:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:39,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-11-12 02:27:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:39,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-12 02:27:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:39,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-11-12 02:27:39,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:39,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-12 02:27:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:39,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2023-11-12 02:27:39,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-12 02:27:39,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:39,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253840516] [2023-11-12 02:27:39,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253840516] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:39,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506595061] [2023-11-12 02:27:39,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:39,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:39,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:39,977 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:39,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_991ca263-42bc-4963-a123-6275f9d8cabe/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:27:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:40,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:27:40,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:40,186 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-11-12 02:27:40,187 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:40,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506595061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:40,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:27:40,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-11-12 02:27:40,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084044670] [2023-11-12 02:27:40,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:40,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:40,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:40,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:40,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:27:40,192 INFO L87 Difference]: Start difference. First operand 25211 states and 35750 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 02:27:41,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:41,546 INFO L93 Difference]: Finished difference Result 42664 states and 59708 transitions. [2023-11-12 02:27:41,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:27:41,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 163 [2023-11-12 02:27:41,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:41,676 INFO L225 Difference]: With dead ends: 42664 [2023-11-12 02:27:41,676 INFO L226 Difference]: Without dead ends: 26751 [2023-11-12 02:27:41,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:27:41,708 INFO L413 NwaCegarLoop]: 4192 mSDtfsCounter, 4088 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4088 SdHoareTripleChecker+Valid, 4373 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:41,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4088 Valid, 4373 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:27:41,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26751 states.