./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.02.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9acc0970-0350-46cd-b9da-cc905554a49a/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9acc0970-0350-46cd-b9da-cc905554a49a/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9acc0970-0350-46cd-b9da-cc905554a49a/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9acc0970-0350-46cd-b9da-cc905554a49a/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.02.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9acc0970-0350-46cd-b9da-cc905554a49a/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9acc0970-0350-46cd-b9da-cc905554a49a/bin/uautomizer-verify-4GaUIPS5ZU --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c77adeba6cdfcefcbb31bf939774adeb705a38d7ca9279d598a2176e2713682c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:03:05,810 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:03:05,890 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9acc0970-0350-46cd-b9da-cc905554a49a/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:03:05,895 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:03:05,895 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:03:05,930 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:03:05,931 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:03:05,931 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:03:05,934 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:03:05,935 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:03:05,938 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:03:05,938 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:03:05,939 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:03:05,939 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:03:05,940 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:03:05,940 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:03:05,940 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:03:05,941 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:03:05,942 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:03:05,943 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:03:05,943 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:03:05,944 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:03:05,944 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:03:05,944 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:03:05,945 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:03:05,945 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:03:05,945 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:03:05,946 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:03:05,946 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:03:05,946 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:03:05,947 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:03:05,947 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:03:05,947 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:03:05,948 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:03:05,948 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:03:05,948 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:03:05,949 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:03:05,949 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:03:05,949 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:03:05,950 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:03:05,950 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:03:05,952 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:03:05,952 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_9acc0970-0350-46cd-b9da-cc905554a49a/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9acc0970-0350-46cd-b9da-cc905554a49a/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c77adeba6cdfcefcbb31bf939774adeb705a38d7ca9279d598a2176e2713682c [2024-10-31 22:03:06,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:03:06,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:03:06,294 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:03:06,295 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:03:06,296 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:03:06,297 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9acc0970-0350-46cd-b9da-cc905554a49a/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.02.cil-1.c Unable to find full path for "g++" [2024-10-31 22:03:08,363 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:03:09,049 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:03:09,052 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9acc0970-0350-46cd-b9da-cc905554a49a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.02.cil-1.c [2024-10-31 22:03:09,113 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9acc0970-0350-46cd-b9da-cc905554a49a/bin/uautomizer-verify-4GaUIPS5ZU/data/94bbfd302/d9511102bbfe4875b8d044292e0cf7e4/FLAG7702f132e [2024-10-31 22:03:09,133 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9acc0970-0350-46cd-b9da-cc905554a49a/bin/uautomizer-verify-4GaUIPS5ZU/data/94bbfd302/d9511102bbfe4875b8d044292e0cf7e4 [2024-10-31 22:03:09,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:03:09,141 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:03:09,142 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:03:09,143 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:03:09,150 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:03:09,152 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:03:09" (1/1) ... [2024-10-31 22:03:09,154 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4da33a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:09, skipping insertion in model container [2024-10-31 22:03:09,154 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:03:09" (1/1) ... [2024-10-31 22:03:09,432 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:03:11,811 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9acc0970-0350-46cd-b9da-cc905554a49a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.02.cil-1.c[381679,381692] [2024-10-31 22:03:11,840 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9acc0970-0350-46cd-b9da-cc905554a49a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.02.cil-1.c[383339,383352] [2024-10-31 22:03:12,014 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:03:12,031 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:03:13,471 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9acc0970-0350-46cd-b9da-cc905554a49a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.02.cil-1.c[381679,381692] [2024-10-31 22:03:13,477 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9acc0970-0350-46cd-b9da-cc905554a49a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.02.cil-1.c[383339,383352] [2024-10-31 22:03:13,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:03:13,574 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:03:13,575 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:13 WrapperNode [2024-10-31 22:03:13,575 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:03:13,576 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:03:13,576 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:03:13,577 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:03:13,585 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:13" (1/1) ... [2024-10-31 22:03:13,682 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:13" (1/1) ... [2024-10-31 22:03:14,181 INFO L138 Inliner]: procedures = 48, calls = 47, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 12633 [2024-10-31 22:03:14,181 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:03:14,182 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:03:14,182 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:03:14,182 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:03:14,195 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:13" (1/1) ... [2024-10-31 22:03:14,196 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:13" (1/1) ... [2024-10-31 22:03:14,265 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:13" (1/1) ... [2024-10-31 22:03:14,365 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-31 22:03:14,365 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:13" (1/1) ... [2024-10-31 22:03:14,365 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:13" (1/1) ... [2024-10-31 22:03:14,699 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:13" (1/1) ... [2024-10-31 22:03:14,741 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:13" (1/1) ... [2024-10-31 22:03:14,795 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:13" (1/1) ... [2024-10-31 22:03:14,814 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:13" (1/1) ... [2024-10-31 22:03:14,893 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:03:14,896 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:03:14,896 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:03:14,897 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:03:14,898 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:13" (1/1) ... [2024-10-31 22:03:14,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:03:14,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9acc0970-0350-46cd-b9da-cc905554a49a/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:03:14,958 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9acc0970-0350-46cd-b9da-cc905554a49a/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:03:15,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9acc0970-0350-46cd-b9da-cc905554a49a/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:03:15,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:03:15,077 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-10-31 22:03:15,077 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-10-31 22:03:15,077 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-10-31 22:03:15,079 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-10-31 22:03:15,079 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-10-31 22:03:15,079 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-10-31 22:03:15,080 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-10-31 22:03:15,080 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-10-31 22:03:15,080 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-10-31 22:03:15,080 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-10-31 22:03:15,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:03:15,080 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-10-31 22:03:15,081 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-10-31 22:03:15,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:03:15,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:03:15,224 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:03:15,229 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:03:26,073 INFO L? ?]: Removed 1695 outVars from TransFormulas that were not future-live. [2024-10-31 22:03:26,074 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:03:26,161 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:03:26,162 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-31 22:03:26,163 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:03:26 BoogieIcfgContainer [2024-10-31 22:03:26,163 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:03:26,167 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:03:26,167 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:03:26,172 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:03:26,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:03:09" (1/3) ... [2024-10-31 22:03:26,174 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47acb667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:03:26, skipping insertion in model container [2024-10-31 22:03:26,174 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:13" (2/3) ... [2024-10-31 22:03:26,174 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47acb667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:03:26, skipping insertion in model container [2024-10-31 22:03:26,175 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:03:26" (3/3) ... [2024-10-31 22:03:26,176 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.02.cil-1.c [2024-10-31 22:03:26,196 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:03:26,196 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-10-31 22:03:26,379 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:03:26,387 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5d4f2311, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:03:26,388 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-31 22:03:26,406 INFO L276 IsEmpty]: Start isEmpty. Operand has 2318 states, 2293 states have (on average 1.8560837331007414) internal successors, (4256), 2296 states have internal predecessors, (4256), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-31 22:03:26,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-31 22:03:26,421 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:03:26,422 INFO L215 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] [2024-10-31 22:03:26,423 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:03:26,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:26,430 INFO L85 PathProgramCache]: Analyzing trace with hash -257117409, now seen corresponding path program 1 times [2024-10-31 22:03:26,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:26,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691522495] [2024-10-31 22:03:26,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:26,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:26,900 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 22:03:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:26,954 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-31 22:03:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:27,025 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-31 22:03:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:27,043 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-31 22:03:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:27,065 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-10-31 22:03:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:03:27,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:27,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691522495] [2024-10-31 22:03:27,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691522495] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:03:27,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:03:27,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:03:27,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560606398] [2024-10-31 22:03:27,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:03:27,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:03:27,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:27,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:03:27,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:03:27,139 INFO L87 Difference]: Start difference. First operand has 2318 states, 2293 states have (on average 1.8560837331007414) internal successors, (4256), 2296 states have internal predecessors, (4256), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 22:03:28,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:03:28,715 INFO L93 Difference]: Finished difference Result 4811 states and 8854 transitions. [2024-10-31 22:03:28,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:03:28,721 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2024-10-31 22:03:28,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:03:28,784 INFO L225 Difference]: With dead ends: 4811 [2024-10-31 22:03:28,789 INFO L226 Difference]: Without dead ends: 2433 [2024-10-31 22:03:28,814 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:03:28,823 INFO L432 NwaCegarLoop]: 4145 mSDtfsCounter, 4439 mSDsluCounter, 12417 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4448 SdHoareTripleChecker+Valid, 16562 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:03:28,825 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4448 Valid, 16562 Invalid, 654 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [68 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-31 22:03:28,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2024-10-31 22:03:29,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 2370. [2024-10-31 22:03:29,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2370 states, 2328 states have (on average 1.8311855670103092) internal successors, (4263), 2331 states have internal predecessors, (4263), 27 states have call successors, (27), 12 states have call predecessors, (27), 13 states have return successors, (30), 27 states have call predecessors, (30), 27 states have call successors, (30) [2024-10-31 22:03:29,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2370 states to 2370 states and 4320 transitions. [2024-10-31 22:03:29,052 INFO L78 Accepts]: Start accepts. Automaton has 2370 states and 4320 transitions. Word has length 68 [2024-10-31 22:03:29,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:03:29,054 INFO L471 AbstractCegarLoop]: Abstraction has 2370 states and 4320 transitions. [2024-10-31 22:03:29,054 INFO L472 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 22:03:29,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2370 states and 4320 transitions. [2024-10-31 22:03:29,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-31 22:03:29,060 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:03:29,061 INFO L215 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] [2024-10-31 22:03:29,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:03:29,061 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:03:29,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:29,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1270216611, now seen corresponding path program 1 times [2024-10-31 22:03:29,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:29,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793661683] [2024-10-31 22:03:29,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:29,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:29,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:29,239 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 22:03:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:29,261 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-31 22:03:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:29,340 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-31 22:03:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:29,361 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-31 22:03:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:29,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-10-31 22:03:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:29,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:03:29,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:29,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793661683] [2024-10-31 22:03:29,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793661683] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:03:29,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:03:29,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-31 22:03:29,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558793323] [2024-10-31 22:03:29,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:03:29,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:03:29,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:29,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:03:29,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:03:29,405 INFO L87 Difference]: Start difference. First operand 2370 states and 4320 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 22:03:30,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:03:30,996 INFO L93 Difference]: Finished difference Result 2822 states and 4989 transitions. [2024-10-31 22:03:30,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 22:03:30,998 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2024-10-31 22:03:30,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:03:31,011 INFO L225 Difference]: With dead ends: 2822 [2024-10-31 22:03:31,012 INFO L226 Difference]: Without dead ends: 2583 [2024-10-31 22:03:31,015 INFO L431 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 [2024-10-31 22:03:31,017 INFO L432 NwaCegarLoop]: 4156 mSDtfsCounter, 4367 mSDsluCounter, 16454 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4376 SdHoareTripleChecker+Valid, 20610 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:03:31,018 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4376 Valid, 20610 Invalid, 995 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [41 Valid, 954 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-31 22:03:31,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2024-10-31 22:03:31,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 2482. [2024-10-31 22:03:31,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2482 states, 2422 states have (on average 1.8158546655656482) internal successors, (4398), 2426 states have internal predecessors, (4398), 38 states have call successors, (38), 18 states have call predecessors, (38), 20 states have return successors, (43), 39 states have call predecessors, (43), 38 states have call successors, (43) [2024-10-31 22:03:31,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 4479 transitions. [2024-10-31 22:03:31,126 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 4479 transitions. Word has length 68 [2024-10-31 22:03:31,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:03:31,127 INFO L471 AbstractCegarLoop]: Abstraction has 2482 states and 4479 transitions. [2024-10-31 22:03:31,128 INFO L472 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 22:03:31,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 4479 transitions. [2024-10-31 22:03:31,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-31 22:03:31,131 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:03:31,131 INFO L215 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] [2024-10-31 22:03:31,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:03:31,132 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:03:31,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:31,137 INFO L85 PathProgramCache]: Analyzing trace with hash 2146235617, now seen corresponding path program 1 times [2024-10-31 22:03:31,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:31,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355407080] [2024-10-31 22:03:31,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:31,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:31,286 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 22:03:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:31,307 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-31 22:03:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:31,369 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-31 22:03:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:31,379 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-31 22:03:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:31,385 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-10-31 22:03:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:03:31,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:31,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355407080] [2024-10-31 22:03:31,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355407080] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:03:31,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:03:31,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-31 22:03:31,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661539228] [2024-10-31 22:03:31,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:03:31,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:03:31,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:31,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:03:31,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:03:31,393 INFO L87 Difference]: Start difference. First operand 2482 states and 4479 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 22:03:32,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:03:32,884 INFO L93 Difference]: Finished difference Result 3217 states and 5562 transitions. [2024-10-31 22:03:32,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 22:03:32,886 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2024-10-31 22:03:32,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:03:32,907 INFO L225 Difference]: With dead ends: 3217 [2024-10-31 22:03:32,908 INFO L226 Difference]: Without dead ends: 2866 [2024-10-31 22:03:32,910 INFO L431 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 [2024-10-31 22:03:32,913 INFO L432 NwaCegarLoop]: 4085 mSDtfsCounter, 4405 mSDsluCounter, 16264 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4414 SdHoareTripleChecker+Valid, 20349 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-31 22:03:32,917 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4414 Valid, 20349 Invalid, 856 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [59 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-31 22:03:32,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2024-10-31 22:03:33,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2707. [2024-10-31 22:03:33,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2707 states, 2611 states have (on average 1.7882037533512065) internal successors, (4669), 2617 states have internal predecessors, (4669), 60 states have call successors, (60), 30 states have call predecessors, (60), 34 states have return successors, (73), 63 states have call predecessors, (73), 60 states have call successors, (73) [2024-10-31 22:03:33,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 4802 transitions. [2024-10-31 22:03:33,119 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 4802 transitions. Word has length 68 [2024-10-31 22:03:33,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:03:33,119 INFO L471 AbstractCegarLoop]: Abstraction has 2707 states and 4802 transitions. [2024-10-31 22:03:33,120 INFO L472 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 22:03:33,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 4802 transitions. [2024-10-31 22:03:33,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-31 22:03:33,123 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:03:33,123 INFO L215 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] [2024-10-31 22:03:33,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:03:33,124 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:03:33,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:33,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1704831005, now seen corresponding path program 1 times [2024-10-31 22:03:33,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:33,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128379595] [2024-10-31 22:03:33,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:33,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:33,299 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 22:03:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:33,328 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-31 22:03:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:33,386 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-31 22:03:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:33,401 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-31 22:03:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:33,411 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-10-31 22:03:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:03:33,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:33,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128379595] [2024-10-31 22:03:33,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128379595] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:03:33,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:03:33,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-31 22:03:33,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831860315] [2024-10-31 22:03:33,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:03:33,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:03:33,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:33,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:03:33,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:03:33,425 INFO L87 Difference]: Start difference. First operand 2707 states and 4802 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)