./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.11.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/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_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.11.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/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_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/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 c5f603027c62ff37561a520351662dbe2fd253b52e04e36028cb9a624978ef8e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 21:01:38,492 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 21:01:38,609 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 21:01:38,619 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 21:01:38,620 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 21:01:38,660 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 21:01:38,662 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 21:01:38,663 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 21:01:38,664 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 21:01:38,669 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 21:01:38,670 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 21:01:38,671 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 21:01:38,672 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 21:01:38,673 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 21:01:38,674 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 21:01:38,674 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 21:01:38,675 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 21:01:38,675 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 21:01:38,676 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 21:01:38,676 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 21:01:38,677 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 21:01:38,677 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 21:01:38,678 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 21:01:38,678 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 21:01:38,678 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 21:01:38,679 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 21:01:38,679 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 21:01:38,680 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 21:01:38,681 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 21:01:38,681 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 21:01:38,682 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 21:01:38,683 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:01:38,683 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 21:01:38,683 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 21:01:38,684 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 21:01:38,684 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 21:01:38,684 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 21:01:38,684 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 21:01:38,685 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 21:01:38,685 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 21:01:38,685 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 21:01:38,686 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 21:01:38,686 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_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c5f603027c62ff37561a520351662dbe2fd253b52e04e36028cb9a624978ef8e [2023-11-21 21:01:39,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 21:01:39,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 21:01:39,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 21:01:39,043 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 21:01:39,044 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 21:01:39,045 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/systemc/token_ring.11.cil-2.c [2023-11-21 21:01:42,295 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 21:01:42,558 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 21:01:42,559 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/sv-benchmarks/c/systemc/token_ring.11.cil-2.c [2023-11-21 21:01:42,583 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/data/7f7ca6c20/7659a5ff261c4363bcf126a09ffe483a/FLAG65bd0e610 [2023-11-21 21:01:42,604 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/data/7f7ca6c20/7659a5ff261c4363bcf126a09ffe483a [2023-11-21 21:01:42,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 21:01:42,612 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 21:01:42,616 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 21:01:42,617 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 21:01:42,622 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 21:01:42,625 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:01:42" (1/1) ... [2023-11-21 21:01:42,626 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27eacb63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:42, skipping insertion in model container [2023-11-21 21:01:42,626 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:01:42" (1/1) ... [2023-11-21 21:01:42,693 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 21:01:42,895 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_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/sv-benchmarks/c/systemc/token_ring.11.cil-2.c[671,684] [2023-11-21 21:01:43,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:01:43,093 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 21:01:43,104 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_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/sv-benchmarks/c/systemc/token_ring.11.cil-2.c[671,684] [2023-11-21 21:01:43,168 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:01:43,195 INFO L206 MainTranslator]: Completed translation [2023-11-21 21:01:43,196 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:43 WrapperNode [2023-11-21 21:01:43,196 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 21:01:43,197 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 21:01:43,197 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 21:01:43,197 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 21:01:43,212 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:43" (1/1) ... [2023-11-21 21:01:43,233 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:43" (1/1) ... [2023-11-21 21:01:43,293 INFO L138 Inliner]: procedures = 50, calls = 64, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 819 [2023-11-21 21:01:43,293 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 21:01:43,294 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 21:01:43,294 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 21:01:43,295 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 21:01:43,306 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:43" (1/1) ... [2023-11-21 21:01:43,306 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:43" (1/1) ... [2023-11-21 21:01:43,311 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:43" (1/1) ... [2023-11-21 21:01:43,329 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 21:01:43,329 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:43" (1/1) ... [2023-11-21 21:01:43,330 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:43" (1/1) ... [2023-11-21 21:01:43,347 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:43" (1/1) ... [2023-11-21 21:01:43,361 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:43" (1/1) ... [2023-11-21 21:01:43,366 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:43" (1/1) ... [2023-11-21 21:01:43,370 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:43" (1/1) ... [2023-11-21 21:01:43,376 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 21:01:43,378 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 21:01:43,378 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 21:01:43,378 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 21:01:43,379 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:43" (1/1) ... [2023-11-21 21:01:43,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:01:43,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:01:43,414 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 21:01:43,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 21:01:43,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 21:01:43,470 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-21 21:01:43,471 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-21 21:01:43,472 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-21 21:01:43,472 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-21 21:01:43,472 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-21 21:01:43,473 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-21 21:01:43,473 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-21 21:01:43,475 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-21 21:01:43,476 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-21 21:01:43,477 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-21 21:01:43,477 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-21 21:01:43,477 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-21 21:01:43,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 21:01:43,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 21:01:43,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 21:01:43,701 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 21:01:43,706 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 21:01:44,757 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 21:01:45,363 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 21:01:45,364 INFO L308 CfgBuilder]: Removed 14 assume(true) statements. [2023-11-21 21:01:45,365 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:01:45 BoogieIcfgContainer [2023-11-21 21:01:45,366 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 21:01:45,370 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 21:01:45,370 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 21:01:45,373 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 21:01:45,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:01:42" (1/3) ... [2023-11-21 21:01:45,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a2c454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:01:45, skipping insertion in model container [2023-11-21 21:01:45,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:43" (2/3) ... [2023-11-21 21:01:45,375 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a2c454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:01:45, skipping insertion in model container [2023-11-21 21:01:45,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:01:45" (3/3) ... [2023-11-21 21:01:45,377 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.11.cil-2.c [2023-11-21 21:01:45,398 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 21:01:45,398 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 21:01:45,475 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 21:01:45,483 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;@616fc1b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 21:01:45,483 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 21:01:45,487 INFO L276 IsEmpty]: Start isEmpty. Operand has 189 states, 156 states have (on average 1.5128205128205128) internal successors, (236), 158 states have internal predecessors, (236), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-21 21:01:45,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-21 21:01:45,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:01:45,499 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] [2023-11-21 21:01:45,499 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:01:45,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:45,504 INFO L85 PathProgramCache]: Analyzing trace with hash 24298289, now seen corresponding path program 1 times [2023-11-21 21:01:45,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:01:45,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995791504] [2023-11-21 21:01:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:45,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:01:45,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:46,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:01:46,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:46,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 21:01:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:46,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 21:01:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:46,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 21:01:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:46,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-21 21:01:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:46,527 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 21:01:46,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:01:46,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995791504] [2023-11-21 21:01:46,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995791504] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:46,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:01:46,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 21:01:46,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861452031] [2023-11-21 21:01:46,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:46,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 21:01:46,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:01:46,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 21:01:46,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 21:01:46,581 INFO L87 Difference]: Start difference. First operand has 189 states, 156 states have (on average 1.5128205128205128) internal successors, (236), 158 states have internal predecessors, (236), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 4 states have internal predecessors, (53), 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) [2023-11-21 21:01:49,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:01:49,178 INFO L93 Difference]: Finished difference Result 550 states and 847 transitions. [2023-11-21 21:01:49,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 21:01:49,182 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 4 states have internal predecessors, (53), 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 63 [2023-11-21 21:01:49,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:01:49,199 INFO L225 Difference]: With dead ends: 550 [2023-11-21 21:01:49,199 INFO L226 Difference]: Without dead ends: 362 [2023-11-21 21:01:49,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-21 21:01:49,214 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 621 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-21 21:01:49,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 932 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-21 21:01:49,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2023-11-21 21:01:49,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 361. [2023-11-21 21:01:49,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 302 states have (on average 1.4768211920529801) internal successors, (446), 304 states have internal predecessors, (446), 46 states have call successors, (46), 12 states have call predecessors, (46), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-21 21:01:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 538 transitions. [2023-11-21 21:01:49,347 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 538 transitions. Word has length 63 [2023-11-21 21:01:49,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:01:49,348 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 538 transitions. [2023-11-21 21:01:49,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 4 states have internal predecessors, (53), 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) [2023-11-21 21:01:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 538 transitions. [2023-11-21 21:01:49,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-21 21:01:49,364 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:01:49,365 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:49,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 21:01:49,365 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:01:49,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:49,367 INFO L85 PathProgramCache]: Analyzing trace with hash 2126260528, now seen corresponding path program 1 times [2023-11-21 21:01:49,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:01:49,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672304205] [2023-11-21 21:01:49,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:49,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:01:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:49,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:01:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:49,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 21:01:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:49,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 21:01:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:49,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 21:01:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:49,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-21 21:01:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:49,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-21 21:01:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:49,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 21:01:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:50,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-11-21 21:01:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 21:01:50,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:01:50,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672304205] [2023-11-21 21:01:50,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672304205] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:01:50,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652253484] [2023-11-21 21:01:50,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:50,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:01:50,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:01:50,036 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:01:50,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 21:01:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:50,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 21:01:50,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-21 21:01:50,395 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:01:50,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652253484] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:50,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:01:50,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 21:01:50,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441624668] [2023-11-21 21:01:50,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:50,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:01:50,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:01:50,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:01:50,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 21:01:50,400 INFO L87 Difference]: Start difference. First operand 361 states and 538 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 21:01:50,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:01:50,620 INFO L93 Difference]: Finished difference Result 1066 states and 1615 transitions. [2023-11-21 21:01:50,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:01:50,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2023-11-21 21:01:50,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:01:50,634 INFO L225 Difference]: With dead ends: 1066 [2023-11-21 21:01:50,634 INFO L226 Difference]: Without dead ends: 710 [2023-11-21 21:01:50,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 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 21:01:50,638 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 253 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 21:01:50,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 507 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 21:01:50,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2023-11-21 21:01:50,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 706. [2023-11-21 21:01:50,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 595 states have (on average 1.4739495798319329) internal successors, (877), 598 states have internal predecessors, (877), 86 states have call successors, (86), 24 states have call predecessors, (86), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-21 21:01:50,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1049 transitions. [2023-11-21 21:01:50,760 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1049 transitions. Word has length 129 [2023-11-21 21:01:50,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:01:50,761 INFO L495 AbstractCegarLoop]: Abstraction has 706 states and 1049 transitions. [2023-11-21 21:01:50,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 21:01:50,762 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1049 transitions. [2023-11-21 21:01:50,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-21 21:01:50,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:01:50,771 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:50,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 21:01:50,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:01:50,988 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:01:50,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:50,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1999019218, now seen corresponding path program 1 times [2023-11-21 21:01:50,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:01:50,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449052239] [2023-11-21 21:01:50,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:50,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:01:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:51,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:01:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:51,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 21:01:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:51,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 21:01:51,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:51,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 21:01:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:51,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-21 21:01:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:51,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-21 21:01:51,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:51,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 21:01:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:51,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-11-21 21:01:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 21:01:51,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:01:51,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449052239] [2023-11-21 21:01:51,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449052239] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:01:51,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728602693] [2023-11-21 21:01:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:51,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:01:51,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:01:51,660 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:01:51,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 21:01:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:51,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 21:01:51,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-21 21:01:51,956 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:01:51,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728602693] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:51,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:01:51,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 21:01:51,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377412073] [2023-11-21 21:01:51,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:51,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:01:51,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:01:51,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:01:51,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 21:01:51,959 INFO L87 Difference]: Start difference. First operand 706 states and 1049 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 21:01:52,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:01:52,203 INFO L93 Difference]: Finished difference Result 2095 states and 3164 transitions. [2023-11-21 21:01:52,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:01:52,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2023-11-21 21:01:52,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:01:52,214 INFO L225 Difference]: With dead ends: 2095 [2023-11-21 21:01:52,214 INFO L226 Difference]: Without dead ends: 1394 [2023-11-21 21:01:52,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 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 21:01:52,219 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 256 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 21:01:52,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 455 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 21:01:52,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2023-11-21 21:01:52,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1388. [2023-11-21 21:01:52,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1175 states have (on average 1.4697872340425533) internal successors, (1727), 1180 states have internal predecessors, (1727), 164 states have call successors, (164), 48 states have call predecessors, (164), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2023-11-21 21:01:52,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2055 transitions. [2023-11-21 21:01:52,418 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2055 transitions. Word has length 129 [2023-11-21 21:01:52,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:01:52,418 INFO L495 AbstractCegarLoop]: Abstraction has 1388 states and 2055 transitions. [2023-11-21 21:01:52,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 21:01:52,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2055 transitions. [2023-11-21 21:01:52,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-21 21:01:52,425 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:01:52,426 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:52,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 21:01:52,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:01:52,639 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:01:52,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:52,640 INFO L85 PathProgramCache]: Analyzing trace with hash -2013724560, now seen corresponding path program 1 times [2023-11-21 21:01:52,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:01:52,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666141574] [2023-11-21 21:01:52,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:52,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:01:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:52,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:01:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:52,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 21:01:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:52,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 21:01:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:53,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 21:01:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:53,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-21 21:01:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:53,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-21 21:01:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:53,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 21:01:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:53,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-11-21 21:01:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 21:01:53,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:01:53,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666141574] [2023-11-21 21:01:53,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666141574] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:01:53,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033703199] [2023-11-21 21:01:53,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:53,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:01:53,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:01:53,068 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:01:53,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 21:01:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:53,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 21:01:53,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-21 21:01:53,399 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:01:53,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033703199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:53,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:01:53,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 21:01:53,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893956924] [2023-11-21 21:01:53,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:53,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:01:53,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:01:53,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:01:53,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 21:01:53,408 INFO L87 Difference]: Start difference. First operand 1388 states and 2055 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 21:01:53,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:01:53,739 INFO L93 Difference]: Finished difference Result 4129 states and 6212 transitions. [2023-11-21 21:01:53,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:01:53,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2023-11-21 21:01:53,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:01:53,758 INFO L225 Difference]: With dead ends: 4129 [2023-11-21 21:01:53,759 INFO L226 Difference]: Without dead ends: 2746 [2023-11-21 21:01:53,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 21:01:53,765 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 241 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 21:01:53,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 455 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 21:01:53,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2023-11-21 21:01:54,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2736. [2023-11-21 21:01:54,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 2323 states have (on average 1.4649160568230737) internal successors, (3403), 2332 states have internal predecessors, (3403), 316 states have call successors, (316), 96 states have call predecessors, (316), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2023-11-21 21:01:54,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 4035 transitions. [2023-11-21 21:01:54,033 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 4035 transitions. Word has length 129 [2023-11-21 21:01:54,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:01:54,033 INFO L495 AbstractCegarLoop]: Abstraction has 2736 states and 4035 transitions. [2023-11-21 21:01:54,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 21:01:54,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 4035 transitions. [2023-11-21 21:01:54,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-21 21:01:54,042 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:01:54,042 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:54,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 21:01:54,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:01:54,257 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:01:54,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:54,257 INFO L85 PathProgramCache]: Analyzing trace with hash -863058066, now seen corresponding path program 1 times [2023-11-21 21:01:54,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:01:54,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263058315] [2023-11-21 21:01:54,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:54,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:01:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:54,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:01:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:54,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 21:01:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:54,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 21:01:54,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:54,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 21:01:54,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:54,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-21 21:01:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:54,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-21 21:01:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:54,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 21:01:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:54,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-11-21 21:01:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 21:01:54,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:01:54,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263058315] [2023-11-21 21:01:54,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263058315] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:01:54,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189077351] [2023-11-21 21:01:54,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:54,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:01:54,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:01:54,687 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:01:54,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 21:01:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:54,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 21:01:54,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-21 21:01:54,964 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:01:54,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189077351] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:54,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:01:54,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 21:01:54,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945534323] [2023-11-21 21:01:54,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:54,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:01:54,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:01:54,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:01:54,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 21:01:54,967 INFO L87 Difference]: Start difference. First operand 2736 states and 4035 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 21:01:55,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:01:55,474 INFO L93 Difference]: Finished difference Result 8149 states and 12208 transitions. [2023-11-21 21:01:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:01:55,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2023-11-21 21:01:55,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:01:55,514 INFO L225 Difference]: With dead ends: 8149 [2023-11-21 21:01:55,514 INFO L226 Difference]: Without dead ends: 5418 [2023-11-21 21:01:55,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 21:01:55,527 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 247 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 21:01:55,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 455 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 21:01:55,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5418 states. [2023-11-21 21:01:56,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5418 to 5400. [2023-11-21 21:01:56,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5400 states, 4595 states have (on average 1.4596300326441785) internal successors, (6707), 4612 states have internal predecessors, (6707), 612 states have call successors, (612), 192 states have call predecessors, (612), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2023-11-21 21:01:56,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5400 states to 5400 states and 7931 transitions. [2023-11-21 21:01:56,065 INFO L78 Accepts]: Start accepts. Automaton has 5400 states and 7931 transitions. Word has length 129 [2023-11-21 21:01:56,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:01:56,066 INFO L495 AbstractCegarLoop]: Abstraction has 5400 states and 7931 transitions. [2023-11-21 21:01:56,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 21:01:56,066 INFO L276 IsEmpty]: Start isEmpty. Operand 5400 states and 7931 transitions. [2023-11-21 21:01:56,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-21 21:01:56,081 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:01:56,081 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:56,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 21:01:56,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:01:56,303 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:01:56,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:56,304 INFO L85 PathProgramCache]: Analyzing trace with hash 463919084, now seen corresponding path program 1 times [2023-11-21 21:01:56,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:01:56,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197537000] [2023-11-21 21:01:56,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:56,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:01:56,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:56,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:01:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:56,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 21:01:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:56,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 21:01:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:56,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 21:01:56,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:56,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-21 21:01:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:56,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-21 21:01:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:56,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 21:01:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:56,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-11-21 21:01:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 21:01:56,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:01:56,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197537000] [2023-11-21 21:01:56,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197537000] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:01:56,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933959576] [2023-11-21 21:01:56,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:56,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:01:56,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:01:56,850 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:01:56,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 21:01:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:57,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 21:01:57,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-21 21:01:57,154 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:01:57,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933959576] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:57,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:01:57,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 21:01:57,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324572034] [2023-11-21 21:01:57,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:57,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:01:57,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:01:57,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:01:57,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 21:01:57,157 INFO L87 Difference]: Start difference. First operand 5400 states and 7931 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 21:01:57,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:01:57,958 INFO L93 Difference]: Finished difference Result 16093 states and 24000 transitions. [2023-11-21 21:01:57,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:01:57,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2023-11-21 21:01:57,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:01:58,034 INFO L225 Difference]: With dead ends: 16093 [2023-11-21 21:01:58,034 INFO L226 Difference]: Without dead ends: 10698 [2023-11-21 21:01:58,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 21:01:58,052 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 235 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 21:01:58,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 455 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 21:01:58,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10698 states. [2023-11-21 21:01:58,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10698 to 10664. [2023-11-21 21:01:58,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10664 states, 9091 states have (on average 1.4540754592454075) internal successors, (13219), 9124 states have internal predecessors, (13219), 1188 states have call successors, (1188), 384 states have call predecessors, (1188), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2023-11-21 21:01:59,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10664 states to 10664 states and 15595 transitions. [2023-11-21 21:01:59,034 INFO L78 Accepts]: Start accepts. Automaton has 10664 states and 15595 transitions. Word has length 129 [2023-11-21 21:01:59,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:01:59,035 INFO L495 AbstractCegarLoop]: Abstraction has 10664 states and 15595 transitions. [2023-11-21 21:01:59,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 21:01:59,035 INFO L276 IsEmpty]: Start isEmpty. Operand 10664 states and 15595 transitions. [2023-11-21 21:01:59,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-21 21:01:59,061 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:01:59,061 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:59,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 21:01:59,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:01:59,283 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:01:59,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:59,283 INFO L85 PathProgramCache]: Analyzing trace with hash -639290006, now seen corresponding path program 1 times [2023-11-21 21:01:59,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:01:59,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023771259] [2023-11-21 21:01:59,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:59,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:01:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:59,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:01:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:59,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 21:01:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:59,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 21:01:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:59,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 21:01:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:59,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-21 21:01:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:59,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-21 21:01:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:59,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 21:01:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:59,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-11-21 21:01:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 21:01:59,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:01:59,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023771259] [2023-11-21 21:01:59,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023771259] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:01:59,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138203345] [2023-11-21 21:01:59,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:59,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:01:59,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:01:59,805 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:01:59,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 21:02:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:00,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 21:02:00,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:02:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 21:02:00,125 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:02:00,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138203345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:02:00,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:02:00,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 21:02:00,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426399113] [2023-11-21 21:02:00,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:02:00,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:02:00,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:02:00,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:02:00,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 21:02:00,128 INFO L87 Difference]: Start difference. First operand 10664 states and 15595 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 21:02:01,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:02:01,502 INFO L93 Difference]: Finished difference Result 31789 states and 47184 transitions. [2023-11-21 21:02:01,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:02:01,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2023-11-21 21:02:01,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:02:01,625 INFO L225 Difference]: With dead ends: 31789 [2023-11-21 21:02:01,625 INFO L226 Difference]: Without dead ends: 21130 [2023-11-21 21:02:01,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 21:02:01,667 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 229 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 21:02:01,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 455 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 21:02:01,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21130 states. [2023-11-21 21:02:03,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21130 to 21064. [2023-11-21 21:02:03,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21064 states, 17987 states have (on average 1.448323789403458) internal successors, (26051), 18052 states have internal predecessors, (26051), 2308 states have call successors, (2308), 768 states have call predecessors, (2308), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2023-11-21 21:02:03,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21064 states to 21064 states and 30667 transitions. [2023-11-21 21:02:03,573 INFO L78 Accepts]: Start accepts. Automaton has 21064 states and 30667 transitions. Word has length 129 [2023-11-21 21:02:03,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:02:03,574 INFO L495 AbstractCegarLoop]: Abstraction has 21064 states and 30667 transitions. [2023-11-21 21:02:03,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 21:02:03,575 INFO L276 IsEmpty]: Start isEmpty. Operand 21064 states and 30667 transitions. [2023-11-21 21:02:03,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-21 21:02:03,618 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:02:03,619 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:03,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 21:02:03,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:02:03,828 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:02:03,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:02:03,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1201604968, now seen corresponding path program 1 times [2023-11-21 21:02:03,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:02:03,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080266169] [2023-11-21 21:02:03,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:02:03,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:02:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:04,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:02:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:04,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 21:02:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:04,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 21:02:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:04,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 21:02:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:04,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-21 21:02:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:04,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-21 21:02:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:04,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 21:02:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:04,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-11-21 21:02:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-21 21:02:04,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:02:04,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080266169] [2023-11-21 21:02:04,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080266169] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:02:04,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:02:04,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 21:02:04,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219224481] [2023-11-21 21:02:04,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:02:04,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 21:02:04,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:02:04,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 21:02:04,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-21 21:02:04,982 INFO L87 Difference]: Start difference. First operand 21064 states and 30667 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-21 21:02:09,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:02:09,876 INFO L93 Difference]: Finished difference Result 62412 states and 90701 transitions. [2023-11-21 21:02:09,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 21:02:09,877 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 129 [2023-11-21 21:02:09,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:02:10,025 INFO L225 Difference]: With dead ends: 62412 [2023-11-21 21:02:10,025 INFO L226 Difference]: Without dead ends: 41354 [2023-11-21 21:02:10,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2023-11-21 21:02:10,077 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 1050 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1070 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-21 21:02:10,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1070 Valid, 586 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-21 21:02:10,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41354 states. [2023-11-21 21:02:13,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41354 to 41352. [2023-11-21 21:02:13,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41352 states, 35331 states have (on average 1.4419914522657156) internal successors, (50947), 35460 states have internal predecessors, (50947), 4484 states have call successors, (4484), 1536 states have call predecessors, (4484), 1536 states have return successors, (4484), 4356 states have call predecessors, (4484), 4484 states have call successors, (4484) [2023-11-21 21:02:13,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41352 states to 41352 states and 59915 transitions. [2023-11-21 21:02:13,839 INFO L78 Accepts]: Start accepts. Automaton has 41352 states and 59915 transitions. Word has length 129 [2023-11-21 21:02:13,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:02:13,840 INFO L495 AbstractCegarLoop]: Abstraction has 41352 states and 59915 transitions. [2023-11-21 21:02:13,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-21 21:02:13,840 INFO L276 IsEmpty]: Start isEmpty. Operand 41352 states and 59915 transitions. [2023-11-21 21:02:14,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-21 21:02:14,117 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:02:14,118 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:14,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 21:02:14,118 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:02:14,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:02:14,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1240593865, now seen corresponding path program 1 times [2023-11-21 21:02:14,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:02:14,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217698018] [2023-11-21 21:02:14,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:02:14,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:02:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:14,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:02:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:14,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 21:02:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:14,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 21:02:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:14,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 21:02:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:14,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-21 21:02:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:14,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2023-11-21 21:02:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:14,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-11-21 21:02:14,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:14,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 21:02:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:14,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2023-11-21 21:02:14,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:14,848 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-21 21:02:14,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:02:14,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217698018] [2023-11-21 21:02:14,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217698018] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:02:14,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323658429] [2023-11-21 21:02:14,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:02:14,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:02:14,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:02:14,852 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:02:14,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 21:02:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:15,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 21:02:15,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:02:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-21 21:02:15,130 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:02:15,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323658429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:02:15,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:02:15,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-11-21 21:02:15,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031861867] [2023-11-21 21:02:15,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:02:15,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:02:15,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:02:15,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:02:15,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-21 21:02:15,135 INFO L87 Difference]: Start difference. First operand 41352 states and 59915 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-21 21:02:18,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 21:02:18,475 INFO L93 Difference]: Finished difference Result 74058 states and 108876 transitions. [2023-11-21 21:02:18,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:02:18,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 151 [2023-11-21 21:02:18,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 21:02:18,734 INFO L225 Difference]: With dead ends: 74058 [2023-11-21 21:02:18,734 INFO L226 Difference]: Without dead ends: 53064 [2023-11-21 21:02:18,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-21 21:02:18,779 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 128 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 21:02:18,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 609 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 21:02:18,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53064 states. [2023-11-21 21:02:22,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53064 to 50184. [2023-11-21 21:02:22,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50184 states, 43907 states have (on average 1.4722709362971735) internal successors, (64643), 44036 states have internal predecessors, (64643), 4612 states have call successors, (4612), 1664 states have call predecessors, (4612), 1664 states have return successors, (4612), 4484 states have call predecessors, (4612), 4612 states have call successors, (4612) [2023-11-21 21:02:22,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50184 states to 50184 states and 73867 transitions. [2023-11-21 21:02:22,499 INFO L78 Accepts]: Start accepts. Automaton has 50184 states and 73867 transitions. Word has length 151 [2023-11-21 21:02:22,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 21:02:22,501 INFO L495 AbstractCegarLoop]: Abstraction has 50184 states and 73867 transitions. [2023-11-21 21:02:22,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-21 21:02:22,501 INFO L276 IsEmpty]: Start isEmpty. Operand 50184 states and 73867 transitions. [2023-11-21 21:02:22,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-21 21:02:22,696 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 21:02:22,696 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:02:22,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 21:02:22,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-21 21:02:22,912 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 21:02:22,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:02:22,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1259103302, now seen corresponding path program 1 times [2023-11-21 21:02:22,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:02:22,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636446096] [2023-11-21 21:02:22,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:02:22,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:02:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:23,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 21:02:23,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:23,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 21:02:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:23,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 21:02:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:23,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 21:02:23,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:23,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-21 21:02:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:23,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2023-11-21 21:02:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:23,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-11-21 21:02:23,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:23,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 21:02:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:23,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2023-11-21 21:02:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:23,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 21:02:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:23,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2023-11-21 21:02:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 73 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-21 21:02:23,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:02:23,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636446096] [2023-11-21 21:02:23,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636446096] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:02:23,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469847336] [2023-11-21 21:02:23,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:02:23,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:02:23,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:02:23,584 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:02:23,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_963e3cea-8e78-4f75-ab22-3dde2b99f0b6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 21:02:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:23,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 1161 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 21:02:23,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:02:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-21 21:02:24,075 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:02:24,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469847336] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:02:24,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 21:02:24,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2023-11-21 21:02:24,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001807057] [2023-11-21 21:02:24,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:02:24,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:02:24,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:02:24,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:02:24,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-21 21:02:24,078 INFO L87 Difference]: Start difference. First operand 50184 states and 73867 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10)