./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 38a1f42f3cb7a9f66fd0bd1b473ab60f2efbe0fc9c998d9f18da86c331297566 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:22:22,100 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:22:22,168 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:22:22,174 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:22:22,174 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:22:22,200 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:22:22,201 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:22:22,201 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:22:22,202 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:22:22,203 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:22:22,203 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:22:22,204 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:22:22,205 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:22:22,206 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:22:22,206 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:22:22,207 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:22:22,208 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:22:22,208 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:22:22,209 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:22:22,210 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:22:22,210 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:22:22,211 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:22:22,212 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:22:22,212 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:22:22,213 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:22:22,213 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:22:22,214 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:22:22,222 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:22:22,222 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:22:22,223 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:22:22,223 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:22:22,224 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:22:22,225 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:22:22,225 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:22:22,226 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:22:22,226 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:22:22,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:22:22,227 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:22:22,228 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:22:22,228 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:22:22,229 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:22:22,232 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:22:22,232 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_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38a1f42f3cb7a9f66fd0bd1b473ab60f2efbe0fc9c998d9f18da86c331297566 [2023-11-21 22:22:22,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:22:22,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:22:22,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:22:22,659 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:22:22,660 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:22:22,661 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c [2023-11-21 22:22:25,791 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:22:26,599 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:22:26,601 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c [2023-11-21 22:22:26,668 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/data/6fb1fd104/912287cf2c5845cdb5ca6ddc3a9355d9/FLAG09f796e9e [2023-11-21 22:22:26,687 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/data/6fb1fd104/912287cf2c5845cdb5ca6ddc3a9355d9 [2023-11-21 22:22:26,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:22:26,692 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:22:26,694 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:22:26,694 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:22:26,702 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:22:26,705 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:22:26" (1/1) ... [2023-11-21 22:22:26,707 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10632fbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:26, skipping insertion in model container [2023-11-21 22:22:26,707 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:22:26" (1/1) ... [2023-11-21 22:22:27,070 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:22:29,615 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_8ab6a85a-b676-4463-807d-62fb87e97f9d/sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c[380593,380606] [2023-11-21 22:22:29,652 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_8ab6a85a-b676-4463-807d-62fb87e97f9d/sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c[383339,383352] [2023-11-21 22:22:30,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:22:30,129 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:22:31,400 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_8ab6a85a-b676-4463-807d-62fb87e97f9d/sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c[380593,380606] [2023-11-21 22:22:31,406 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_8ab6a85a-b676-4463-807d-62fb87e97f9d/sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c[383339,383352] [2023-11-21 22:22:31,431 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:22:31,513 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:22:31,514 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:31 WrapperNode [2023-11-21 22:22:31,514 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:22:31,515 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:22:31,515 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:22:31,516 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:22:31,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:31" (1/1) ... [2023-11-21 22:22:31,610 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:31" (1/1) ... [2023-11-21 22:22:32,020 INFO L138 Inliner]: procedures = 68, calls = 78, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 13232 [2023-11-21 22:22:32,021 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:22:32,021 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:22:32,022 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:22:32,022 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:22:32,036 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:31" (1/1) ... [2023-11-21 22:22:32,036 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:31" (1/1) ... [2023-11-21 22:22:32,200 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:31" (1/1) ... [2023-11-21 22:22:32,292 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 22:22:32,293 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:31" (1/1) ... [2023-11-21 22:22:32,293 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:31" (1/1) ... [2023-11-21 22:22:32,485 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:31" (1/1) ... [2023-11-21 22:22:32,543 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:31" (1/1) ... [2023-11-21 22:22:32,564 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:31" (1/1) ... [2023-11-21 22:22:32,585 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:31" (1/1) ... [2023-11-21 22:22:32,638 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:22:32,639 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:22:32,639 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:22:32,639 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:22:32,640 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:31" (1/1) ... [2023-11-21 22:22:32,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:22:32,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:22:32,672 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:22:32,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:22:32,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:22:32,816 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-21 22:22:32,817 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-21 22:22:32,817 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-21 22:22:32,817 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-21 22:22:32,817 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-21 22:22:32,817 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-21 22:22:32,817 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-21 22:22:32,817 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-21 22:22:32,818 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-21 22:22:32,818 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-21 22:22:32,818 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-21 22:22:32,818 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-21 22:22:32,818 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-21 22:22:32,818 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-21 22:22:32,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:22:32,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:22:32,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:22:32,962 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:22:32,964 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:22:42,723 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:22:58,381 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:22:58,382 INFO L308 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-21 22:22:58,384 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:22:58 BoogieIcfgContainer [2023-11-21 22:22:58,384 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:22:58,387 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:22:58,387 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:22:58,390 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:22:58,391 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:22:26" (1/3) ... [2023-11-21 22:22:58,392 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bac13c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:22:58, skipping insertion in model container [2023-11-21 22:22:58,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:22:31" (2/3) ... [2023-11-21 22:22:58,392 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bac13c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:22:58, skipping insertion in model container [2023-11-21 22:22:58,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:22:58" (3/3) ... [2023-11-21 22:22:58,394 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.14.cil.c [2023-11-21 22:22:58,421 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:22:58,422 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-21 22:22:58,533 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:22:58,541 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;@2e0ab823, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:22:58,542 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-21 22:22:58,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 1850 states, 1812 states have (on average 1.9492273730684326) internal successors, (3532), 1817 states have internal predecessors, (3532), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-21 22:22:58,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-21 22:22:58,577 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:22:58,578 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] [2023-11-21 22:22:58,579 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:22:58,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:22:58,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1199914159, now seen corresponding path program 1 times [2023-11-21 22:22:58,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:22:58,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931435287] [2023-11-21 22:22:58,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:22:58,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:22:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:59,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:22:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:59,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:22:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:59,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:22:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:59,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-21 22:22:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:59,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-21 22:22:59,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:22:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:22:59,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:22:59,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931435287] [2023-11-21 22:22:59,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931435287] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:22:59,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:22:59,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:22:59,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031866988] [2023-11-21 22:22:59,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:22:59,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:22:59,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:22:59,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:22:59,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:22:59,615 INFO L87 Difference]: Start difference. First operand has 1850 states, 1812 states have (on average 1.9492273730684326) internal successors, (3532), 1817 states have internal predecessors, (3532), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 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) [2023-11-21 22:23:03,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:23:03,782 INFO L93 Difference]: Finished difference Result 3883 states and 7470 transitions. [2023-11-21 22:23:03,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 22:23:03,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 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 68 [2023-11-21 22:23:03,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:23:03,820 INFO L225 Difference]: With dead ends: 3883 [2023-11-21 22:23:03,820 INFO L226 Difference]: Without dead ends: 2032 [2023-11-21 22:23:03,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:23:03,840 INFO L413 NwaCegarLoop]: 3410 mSDtfsCounter, 3947 mSDsluCounter, 9840 mSDsCounter, 0 mSdLazyCounter, 1912 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3991 SdHoareTripleChecker+Valid, 13250 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-21 22:23:03,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3991 Valid, 13250 Invalid, 2028 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [116 Valid, 1912 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-21 22:23:03,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2023-11-21 22:23:04,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2031. [2023-11-21 22:23:04,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 1967 states have (on average 1.9084900864260295) internal successors, (3754), 1971 states have internal predecessors, (3754), 50 states have call successors, (50), 13 states have call predecessors, (50), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2023-11-21 22:23:04,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 3852 transitions. [2023-11-21 22:23:04,023 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 3852 transitions. Word has length 68 [2023-11-21 22:23:04,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:23:04,024 INFO L495 AbstractCegarLoop]: Abstraction has 2031 states and 3852 transitions. [2023-11-21 22:23:04,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 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) [2023-11-21 22:23:04,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 3852 transitions. [2023-11-21 22:23:04,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-21 22:23:04,034 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:23:04,034 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, 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] [2023-11-21 22:23:04,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:23:04,035 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:23:04,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:04,036 INFO L85 PathProgramCache]: Analyzing trace with hash 915582303, now seen corresponding path program 1 times [2023-11-21 22:23:04,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:04,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816190339] [2023-11-21 22:23:04,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:04,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:04,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:23:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:04,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:23:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:04,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:23:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:04,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-21 22:23:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:04,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-21 22:23:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:04,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-21 22:23:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:04,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:23:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:04,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-21 22:23:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 22:23:04,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:04,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816190339] [2023-11-21 22:23:04,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816190339] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:23:04,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641028775] [2023-11-21 22:23:04,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:04,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:23:04,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:23:04,691 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:23:04,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:23:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:04,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:23:04,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:23:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-21 22:23:05,079 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:23:05,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641028775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:23:05,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:23:05,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 22:23:05,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419378645] [2023-11-21 22:23:05,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:23:05,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:23:05,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:05,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:23:05,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:23:05,084 INFO L87 Difference]: Start difference. First operand 2031 states and 3852 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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) [2023-11-21 22:23:05,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:23:05,678 INFO L93 Difference]: Finished difference Result 2794 states and 5023 transitions. [2023-11-21 22:23:05,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:23:05,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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 138 [2023-11-21 22:23:05,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:23:05,699 INFO L225 Difference]: With dead ends: 2794 [2023-11-21 22:23:05,700 INFO L226 Difference]: Without dead ends: 2409 [2023-11-21 22:23:05,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:23:05,705 INFO L413 NwaCegarLoop]: 3373 mSDtfsCounter, 3529 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3529 SdHoareTripleChecker+Valid, 3620 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:23:05,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3529 Valid, 3620 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:23:05,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2409 states. [2023-11-21 22:23:05,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2409 to 2403. [2023-11-21 22:23:05,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2403 states, 2285 states have (on average 1.8490153172866521) internal successors, (4225), 2290 states have internal predecessors, (4225), 92 states have call successors, (92), 25 states have call predecessors, (92), 24 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2023-11-21 22:23:05,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 4407 transitions. [2023-11-21 22:23:05,848 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 4407 transitions. Word has length 138 [2023-11-21 22:23:05,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:23:05,851 INFO L495 AbstractCegarLoop]: Abstraction has 2403 states and 4407 transitions. [2023-11-21 22:23:05,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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) [2023-11-21 22:23:05,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 4407 transitions. [2023-11-21 22:23:05,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-21 22:23:05,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:23:05,864 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, 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] [2023-11-21 22:23:05,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:23:06,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:23:06,087 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:23:06,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:06,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1811055743, now seen corresponding path program 1 times [2023-11-21 22:23:06,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:06,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823737542] [2023-11-21 22:23:06,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:06,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:06,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:23:06,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:06,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:23:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:06,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:23:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:06,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-21 22:23:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:06,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-21 22:23:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:06,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-21 22:23:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:06,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:23:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:06,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-21 22:23:06,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 22:23:06,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:06,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823737542] [2023-11-21 22:23:06,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823737542] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:23:06,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095864205] [2023-11-21 22:23:06,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:06,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:23:06,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:23:06,683 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:23:06,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:23:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:06,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:23:06,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:23:07,026 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-21 22:23:07,026 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:23:07,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095864205] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:23:07,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:23:07,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 22:23:07,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143430946] [2023-11-21 22:23:07,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:23:07,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:23:07,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:07,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:23:07,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:23:07,038 INFO L87 Difference]: Start difference. First operand 2403 states and 4407 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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) [2023-11-21 22:23:07,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:23:07,751 INFO L93 Difference]: Finished difference Result 3904 states and 6706 transitions. [2023-11-21 22:23:07,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:23:07,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 138 [2023-11-21 22:23:07,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:23:07,777 INFO L225 Difference]: With dead ends: 3904 [2023-11-21 22:23:07,778 INFO L226 Difference]: Without dead ends: 3147 [2023-11-21 22:23:07,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:23:07,786 INFO L413 NwaCegarLoop]: 3371 mSDtfsCounter, 3547 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3547 SdHoareTripleChecker+Valid, 3618 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:23:07,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3547 Valid, 3618 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:23:07,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2023-11-21 22:23:07,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 3139. [2023-11-21 22:23:07,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3139 states, 2915 states have (on average 1.7684391080617496) internal successors, (5155), 2922 states have internal predecessors, (5155), 174 states have call successors, (174), 49 states have call predecessors, (174), 48 states have return successors, (172), 168 states have call predecessors, (172), 172 states have call successors, (172) [2023-11-21 22:23:07,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3139 states to 3139 states and 5501 transitions. [2023-11-21 22:23:07,973 INFO L78 Accepts]: Start accepts. Automaton has 3139 states and 5501 transitions. Word has length 138 [2023-11-21 22:23:07,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:23:07,973 INFO L495 AbstractCegarLoop]: Abstraction has 3139 states and 5501 transitions. [2023-11-21 22:23:07,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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) [2023-11-21 22:23:07,974 INFO L276 IsEmpty]: Start isEmpty. Operand 3139 states and 5501 transitions. [2023-11-21 22:23:07,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-21 22:23:07,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:23:07,980 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, 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] [2023-11-21 22:23:08,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:23:08,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:23:08,196 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:23:08,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:08,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1962333087, now seen corresponding path program 1 times [2023-11-21 22:23:08,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:08,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088215335] [2023-11-21 22:23:08,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:08,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:08,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:23:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:08,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:23:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:08,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:23:08,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:08,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-21 22:23:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:08,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-21 22:23:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:08,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-21 22:23:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:08,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:23:08,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:08,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-21 22:23:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 22:23:08,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:08,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088215335] [2023-11-21 22:23:08,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088215335] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:23:08,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107469697] [2023-11-21 22:23:08,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:08,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:23:08,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:23:08,780 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:23:08,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:23:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:09,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:23:09,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:23:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-21 22:23:09,100 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:23:09,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107469697] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:23:09,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:23:09,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 22:23:09,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115619721] [2023-11-21 22:23:09,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:23:09,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:23:09,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:09,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:23:09,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:23:09,103 INFO L87 Difference]: Start difference. First operand 3139 states and 5501 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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) [2023-11-21 22:23:09,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:23:09,796 INFO L93 Difference]: Finished difference Result 6100 states and 10022 transitions. [2023-11-21 22:23:09,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:23:09,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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 138 [2023-11-21 22:23:09,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:23:09,825 INFO L225 Difference]: With dead ends: 6100 [2023-11-21 22:23:09,826 INFO L226 Difference]: Without dead ends: 4607 [2023-11-21 22:23:09,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:23:09,834 INFO L413 NwaCegarLoop]: 3311 mSDtfsCounter, 3541 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3541 SdHoareTripleChecker+Valid, 3558 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:23:09,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3541 Valid, 3558 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:23:09,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4607 states. [2023-11-21 22:23:10,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4607 to 4595. [2023-11-21 22:23:10,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4595 states, 4163 states have (on average 1.679317799663704) internal successors, (6991), 4174 states have internal predecessors, (6991), 334 states have call successors, (334), 97 states have call predecessors, (334), 96 states have return successors, (332), 324 states have call predecessors, (332), 332 states have call successors, (332) [2023-11-21 22:23:10,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4595 states to 4595 states and 7657 transitions. [2023-11-21 22:23:10,115 INFO L78 Accepts]: Start accepts. Automaton has 4595 states and 7657 transitions. Word has length 138 [2023-11-21 22:23:10,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:23:10,116 INFO L495 AbstractCegarLoop]: Abstraction has 4595 states and 7657 transitions. [2023-11-21 22:23:10,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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) [2023-11-21 22:23:10,116 INFO L276 IsEmpty]: Start isEmpty. Operand 4595 states and 7657 transitions. [2023-11-21 22:23:10,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-21 22:23:10,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:23:10,125 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, 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] [2023-11-21 22:23:10,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:23:10,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:23:10,336 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:23:10,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:10,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1856830143, now seen corresponding path program 1 times [2023-11-21 22:23:10,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:10,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184376096] [2023-11-21 22:23:10,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:10,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:23:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:23:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:23:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:23:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-21 22:23:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-21 22:23:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-21 22:23:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:23:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-21 22:23:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 22:23:10,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:23:10,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184376096] [2023-11-21 22:23:10,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184376096] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:23:10,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466102004] [2023-11-21 22:23:10,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:10,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:23:10,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:23:10,911 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:23:10,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab6a85a-b676-4463-807d-62fb87e97f9d/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:23:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:23:11,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:23:11,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:23:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-21 22:23:11,226 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:23:11,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466102004] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:23:11,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:23:11,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 22:23:11,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563894988] [2023-11-21 22:23:11,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:23:11,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:23:11,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:23:11,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:23:11,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:23:11,229 INFO L87 Difference]: Start difference. First operand 4595 states and 7657 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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)