./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a0cf3566e24b445695278143ce06a9bd6b4348c9de696d02fe86c47eb1775574 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 21:56:00,679 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 21:56:00,771 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 21:56:00,779 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 21:56:00,781 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 21:56:00,820 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 21:56:00,821 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 21:56:00,822 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 21:56:00,823 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 21:56:00,825 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 21:56:00,825 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 21:56:00,826 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 21:56:00,827 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 21:56:00,828 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 21:56:00,830 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 21:56:00,831 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 21:56:00,832 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 21:56:00,832 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 21:56:00,833 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 21:56:00,834 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 21:56:00,834 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 21:56:00,838 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 21:56:00,839 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 21:56:00,839 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 21:56:00,840 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 21:56:00,840 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 21:56:00,840 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 21:56:00,841 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 21:56:00,841 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 21:56:00,844 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 21:56:00,845 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 21:56:00,846 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 21:56:00,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:56:00,847 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 21:56:00,847 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 21:56:00,848 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 21:56:00,848 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 21:56:00,848 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 21:56:00,849 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 21:56:00,849 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 21:56:00,850 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 21:56:00,850 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 21:56:00,850 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_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0cf3566e24b445695278143ce06a9bd6b4348c9de696d02fe86c47eb1775574 [2024-10-31 21:56:01,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 21:56:01,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 21:56:01,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 21:56:01,226 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 21:56:01,226 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 21:56:01,228 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c Unable to find full path for "g++" [2024-10-31 21:56:03,348 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 21:56:03,603 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 21:56:03,604 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c [2024-10-31 21:56:03,635 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/data/cd50092dc/16bec6fc12e542d58c851967b027d8db/FLAGd7ae0810a [2024-10-31 21:56:03,923 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/data/cd50092dc/16bec6fc12e542d58c851967b027d8db [2024-10-31 21:56:03,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 21:56:03,927 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 21:56:03,928 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 21:56:03,928 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 21:56:03,935 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 21:56:03,935 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:56:03" (1/1) ... [2024-10-31 21:56:03,937 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@520193df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:03, skipping insertion in model container [2024-10-31 21:56:03,937 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:56:03" (1/1) ... [2024-10-31 21:56:03,989 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 21:56:04,187 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c[913,926] [2024-10-31 21:56:04,254 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c[5977,5990] [2024-10-31 21:56:04,385 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:56:04,400 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 21:56:04,415 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c[913,926] [2024-10-31 21:56:04,444 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c[5977,5990] [2024-10-31 21:56:04,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:56:04,563 INFO L204 MainTranslator]: Completed translation [2024-10-31 21:56:04,564 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:04 WrapperNode [2024-10-31 21:56:04,564 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 21:56:04,566 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 21:56:04,567 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 21:56:04,567 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 21:56:04,576 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:04" (1/1) ... [2024-10-31 21:56:04,595 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:04" (1/1) ... [2024-10-31 21:56:04,672 INFO L138 Inliner]: procedures = 62, calls = 70, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 789 [2024-10-31 21:56:04,672 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 21:56:04,673 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 21:56:04,673 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 21:56:04,673 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 21:56:04,698 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:04" (1/1) ... [2024-10-31 21:56:04,698 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:04" (1/1) ... [2024-10-31 21:56:04,707 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:04" (1/1) ... [2024-10-31 21:56:04,737 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-31 21:56:04,741 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:04" (1/1) ... [2024-10-31 21:56:04,741 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:04" (1/1) ... [2024-10-31 21:56:04,754 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:04" (1/1) ... [2024-10-31 21:56:04,772 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:04" (1/1) ... [2024-10-31 21:56:04,776 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:04" (1/1) ... [2024-10-31 21:56:04,786 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:04" (1/1) ... [2024-10-31 21:56:04,793 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 21:56:04,794 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 21:56:04,794 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 21:56:04,795 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 21:56:04,795 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:04" (1/1) ... [2024-10-31 21:56:04,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:56:04,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:04,836 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 21:56:04,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 21:56:04,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 21:56:04,875 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-10-31 21:56:04,875 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-10-31 21:56:04,875 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2024-10-31 21:56:04,877 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2024-10-31 21:56:04,877 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-10-31 21:56:04,877 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-10-31 21:56:04,878 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-10-31 21:56:04,878 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-10-31 21:56:04,878 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-10-31 21:56:04,878 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-10-31 21:56:04,878 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-10-31 21:56:04,878 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-10-31 21:56:04,878 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-10-31 21:56:04,879 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-10-31 21:56:04,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 21:56:04,879 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-10-31 21:56:04,879 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-10-31 21:56:04,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 21:56:04,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 21:56:04,879 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-10-31 21:56:04,880 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-10-31 21:56:04,880 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2024-10-31 21:56:04,882 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2024-10-31 21:56:05,052 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 21:56:05,057 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 21:56:06,002 INFO L? ?]: Removed 101 outVars from TransFormulas that were not future-live. [2024-10-31 21:56:06,003 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 21:56:06,025 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 21:56:06,025 INFO L316 CfgBuilder]: Removed 14 assume(true) statements. [2024-10-31 21:56:06,026 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:56:06 BoogieIcfgContainer [2024-10-31 21:56:06,026 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 21:56:06,029 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 21:56:06,030 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 21:56:06,033 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 21:56:06,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 09:56:03" (1/3) ... [2024-10-31 21:56:06,034 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c54a926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:56:06, skipping insertion in model container [2024-10-31 21:56:06,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:04" (2/3) ... [2024-10-31 21:56:06,035 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c54a926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:56:06, skipping insertion in model container [2024-10-31 21:56:06,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:56:06" (3/3) ... [2024-10-31 21:56:06,037 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.07.cil-2.c [2024-10-31 21:56:06,056 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 21:56:06,057 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-10-31 21:56:06,146 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 21:56:06,154 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3cc5a50a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 21:56:06,154 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-31 21:56:06,164 INFO L276 IsEmpty]: Start isEmpty. Operand has 345 states, 303 states have (on average 1.613861386138614) internal successors, (489), 310 states have internal predecessors, (489), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2024-10-31 21:56:06,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-31 21:56:06,179 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:56:06,180 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:06,181 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:56:06,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:06,188 INFO L85 PathProgramCache]: Analyzing trace with hash 269349357, now seen corresponding path program 1 times [2024-10-31 21:56:06,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:06,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28888852] [2024-10-31 21:56:06,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:06,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:06,556 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-31 21:56:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:06,597 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-31 21:56:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:06,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:06,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28888852] [2024-10-31 21:56:06,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28888852] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:06,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:06,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 21:56:06,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812490338] [2024-10-31 21:56:06,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:06,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:56:06,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:06,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:56:06,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:56:06,661 INFO L87 Difference]: Start difference. First operand has 345 states, 303 states have (on average 1.613861386138614) internal successors, (489), 310 states have internal predecessors, (489), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 21:56:07,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:56:07,431 INFO L93 Difference]: Finished difference Result 739 states and 1172 transitions. [2024-10-31 21:56:07,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:56:07,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2024-10-31 21:56:07,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:56:07,448 INFO L225 Difference]: With dead ends: 739 [2024-10-31 21:56:07,449 INFO L226 Difference]: Without dead ends: 404 [2024-10-31 21:56:07,454 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:56:07,457 INFO L432 NwaCegarLoop]: 350 mSDtfsCounter, 664 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-31 21:56:07,460 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 690 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-31 21:56:07,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2024-10-31 21:56:07,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 398. [2024-10-31 21:56:07,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 352 states have (on average 1.4943181818181819) internal successors, (526), 357 states have internal predecessors, (526), 33 states have call successors, (33), 12 states have call predecessors, (33), 11 states have return successors, (35), 29 states have call predecessors, (35), 29 states have call successors, (35) [2024-10-31 21:56:07,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 594 transitions. [2024-10-31 21:56:07,560 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 594 transitions. Word has length 44 [2024-10-31 21:56:07,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:56:07,560 INFO L471 AbstractCegarLoop]: Abstraction has 398 states and 594 transitions. [2024-10-31 21:56:07,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 21:56:07,561 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 594 transitions. [2024-10-31 21:56:07,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-31 21:56:07,564 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:56:07,564 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:07,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 21:56:07,565 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:56:07,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:07,566 INFO L85 PathProgramCache]: Analyzing trace with hash -461325641, now seen corresponding path program 1 times [2024-10-31 21:56:07,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:07,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265803600] [2024-10-31 21:56:07,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:07,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:07,669 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-31 21:56:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:07,686 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-31 21:56:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:07,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:07,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265803600] [2024-10-31 21:56:07,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265803600] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:07,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:07,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 21:56:07,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047679647] [2024-10-31 21:56:07,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:07,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:56:07,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:07,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:56:07,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:56:07,715 INFO L87 Difference]: Start difference. First operand 398 states and 594 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 21:56:08,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:56:08,471 INFO L93 Difference]: Finished difference Result 646 states and 934 transitions. [2024-10-31 21:56:08,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:56:08,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2024-10-31 21:56:08,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:56:08,480 INFO L225 Difference]: With dead ends: 646 [2024-10-31 21:56:08,481 INFO L226 Difference]: Without dead ends: 522 [2024-10-31 21:56:08,488 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:56:08,489 INFO L432 NwaCegarLoop]: 354 mSDtfsCounter, 280 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-31 21:56:08,490 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 899 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-31 21:56:08,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2024-10-31 21:56:08,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 465. [2024-10-31 21:56:08,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 413 states have (on average 1.476997578692494) internal successors, (610), 418 states have internal predecessors, (610), 36 states have call successors, (36), 15 states have call predecessors, (36), 14 states have return successors, (38), 32 states have call predecessors, (38), 32 states have call successors, (38) [2024-10-31 21:56:08,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 684 transitions. [2024-10-31 21:56:08,566 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 684 transitions. Word has length 45 [2024-10-31 21:56:08,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:56:08,567 INFO L471 AbstractCegarLoop]: Abstraction has 465 states and 684 transitions. [2024-10-31 21:56:08,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 21:56:08,568 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 684 transitions. [2024-10-31 21:56:08,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-31 21:56:08,570 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:56:08,570 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:08,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 21:56:08,571 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:56:08,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:08,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1745683102, now seen corresponding path program 1 times [2024-10-31 21:56:08,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:08,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381351639] [2024-10-31 21:56:08,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:08,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:08,672 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-31 21:56:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:08,693 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-31 21:56:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:08,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:08,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381351639] [2024-10-31 21:56:08,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381351639] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:08,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:08,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 21:56:08,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437364724] [2024-10-31 21:56:08,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:08,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:56:08,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:08,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:56:08,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:56:08,712 INFO L87 Difference]: Start difference. First operand 465 states and 684 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 21:56:09,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:56:09,231 INFO L93 Difference]: Finished difference Result 873 states and 1243 transitions. [2024-10-31 21:56:09,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:56:09,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2024-10-31 21:56:09,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:56:09,240 INFO L225 Difference]: With dead ends: 873 [2024-10-31 21:56:09,240 INFO L226 Difference]: Without dead ends: 682 [2024-10-31 21:56:09,242 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:56:09,244 INFO L432 NwaCegarLoop]: 336 mSDtfsCounter, 681 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 21:56:09,245 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [702 Valid, 662 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 21:56:09,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2024-10-31 21:56:09,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 630. [2024-10-31 21:56:09,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 559 states have (on average 1.4311270125223614) internal successors, (800), 567 states have internal predecessors, (800), 47 states have call successors, (47), 22 states have call predecessors, (47), 22 states have return successors, (55), 41 states have call predecessors, (55), 43 states have call successors, (55) [2024-10-31 21:56:09,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 902 transitions. [2024-10-31 21:56:09,316 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 902 transitions. Word has length 45 [2024-10-31 21:56:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:56:09,316 INFO L471 AbstractCegarLoop]: Abstraction has 630 states and 902 transitions. [2024-10-31 21:56:09,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 21:56:09,317 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 902 transitions. [2024-10-31 21:56:09,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-10-31 21:56:09,323 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:56:09,323 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-10-31 21:56:09,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 21:56:09,324 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:56:09,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:09,326 INFO L85 PathProgramCache]: Analyzing trace with hash 201479069, now seen corresponding path program 1 times [2024-10-31 21:56:09,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:09,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877208763] [2024-10-31 21:56:09,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:09,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:09,455 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-31 21:56:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:09,458 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-31 21:56:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:09,478 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-31 21:56:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 21:56:09,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:09,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877208763] [2024-10-31 21:56:09,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877208763] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:09,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:09,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 21:56:09,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231633173] [2024-10-31 21:56:09,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:09,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:56:09,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:09,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:56:09,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:56:09,488 INFO L87 Difference]: Start difference. First operand 630 states and 902 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 21:56:10,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:56:10,118 INFO L93 Difference]: Finished difference Result 1214 states and 1687 transitions. [2024-10-31 21:56:10,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:56:10,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2024-10-31 21:56:10,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:56:10,125 INFO L225 Difference]: With dead ends: 1214 [2024-10-31 21:56:10,125 INFO L226 Difference]: Without dead ends: 858 [2024-10-31 21:56:10,127 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:56:10,128 INFO L432 NwaCegarLoop]: 376 mSDtfsCounter, 264 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 21:56:10,129 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 951 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-31 21:56:10,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2024-10-31 21:56:10,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 820. [2024-10-31 21:56:10,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 725 states have (on average 1.3793103448275863) internal successors, (1000), 735 states have internal predecessors, (1000), 61 states have call successors, (61), 30 states have call predecessors, (61), 32 states have return successors, (79), 55 states have call predecessors, (79), 57 states have call successors, (79) [2024-10-31 21:56:10,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1140 transitions. [2024-10-31 21:56:10,190 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1140 transitions. Word has length 62 [2024-10-31 21:56:10,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:56:10,191 INFO L471 AbstractCegarLoop]: Abstraction has 820 states and 1140 transitions. [2024-10-31 21:56:10,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 21:56:10,191 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1140 transitions. [2024-10-31 21:56:10,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-10-31 21:56:10,193 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:56:10,194 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-10-31 21:56:10,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 21:56:10,194 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:56:10,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:10,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1220888774, now seen corresponding path program 1 times [2024-10-31 21:56:10,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:10,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395707206] [2024-10-31 21:56:10,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:10,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:10,238 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-31 21:56:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:10,251 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-31 21:56:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:10,258 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-10-31 21:56:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-31 21:56:10,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:10,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395707206] [2024-10-31 21:56:10,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395707206] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:10,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:10,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 21:56:10,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662674729] [2024-10-31 21:56:10,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:10,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:56:10,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:10,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:56:10,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:56:10,269 INFO L87 Difference]: Start difference. First operand 820 states and 1140 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 21:56:10,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:56:10,883 INFO L93 Difference]: Finished difference Result 1473 states and 1993 transitions. [2024-10-31 21:56:10,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:56:10,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2024-10-31 21:56:10,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:56:10,891 INFO L225 Difference]: With dead ends: 1473 [2024-10-31 21:56:10,891 INFO L226 Difference]: Without dead ends: 1019 [2024-10-31 21:56:10,896 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:56:10,897 INFO L432 NwaCegarLoop]: 332 mSDtfsCounter, 671 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 21:56:10,899 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 658 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-31 21:56:10,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2024-10-31 21:56:10,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 964. [2024-10-31 21:56:10,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 853 states have (on average 1.3493552168815943) internal successors, (1151), 865 states have internal predecessors, (1151), 69 states have call successors, (69), 36 states have call predecessors, (69), 40 states have return successors, (93), 63 states have call predecessors, (93), 65 states have call successors, (93) [2024-10-31 21:56:10,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1313 transitions. [2024-10-31 21:56:10,995 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1313 transitions. Word has length 67 [2024-10-31 21:56:10,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:56:10,995 INFO L471 AbstractCegarLoop]: Abstraction has 964 states and 1313 transitions. [2024-10-31 21:56:10,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 21:56:10,996 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1313 transitions. [2024-10-31 21:56:10,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-31 21:56:10,999 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:56:10,999 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-10-31 21:56:10,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 21:56:11,000 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:56:11,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:11,001 INFO L85 PathProgramCache]: Analyzing trace with hash 890321295, now seen corresponding path program 1 times [2024-10-31 21:56:11,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:11,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750021873] [2024-10-31 21:56:11,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:11,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:11,117 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-31 21:56:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:11,127 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 21:56:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:11,192 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-10-31 21:56:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 21:56:11,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:11,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750021873] [2024-10-31 21:56:11,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750021873] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:11,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584807211] [2024-10-31 21:56:11,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:11,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:11,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:11,207 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:11,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 21:56:11,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:11,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 21:56:11,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:56:11,432 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:56:11,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584807211] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:11,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:56:11,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-10-31 21:56:11,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779662042] [2024-10-31 21:56:11,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:11,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:56:11,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:11,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:56:11,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-31 21:56:11,437 INFO L87 Difference]: Start difference. First operand 964 states and 1313 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 21:56:11,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:56:11,520 INFO L93 Difference]: Finished difference Result 1507 states and 2036 transitions. [2024-10-31 21:56:11,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:56:11,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2024-10-31 21:56:11,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:56:11,528 INFO L225 Difference]: With dead ends: 1507 [2024-10-31 21:56:11,528 INFO L226 Difference]: Without dead ends: 962 [2024-10-31 21:56:11,530 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-31 21:56:11,534 INFO L432 NwaCegarLoop]: 552 mSDtfsCounter, 72 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 21:56:11,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1027 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 21:56:11,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2024-10-31 21:56:11,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 918. [2024-10-31 21:56:11,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 813 states have (on average 1.3357933579335792) internal successors, (1086), 825 states have internal predecessors, (1086), 65 states have call successors, (65), 34 states have call predecessors, (65), 38 states have return successors, (87), 59 states have call predecessors, (87), 61 states have call successors, (87) [2024-10-31 21:56:11,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1238 transitions. [2024-10-31 21:56:11,606 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1238 transitions. Word has length 68 [2024-10-31 21:56:11,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:56:11,609 INFO L471 AbstractCegarLoop]: Abstraction has 918 states and 1238 transitions. [2024-10-31 21:56:11,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 21:56:11,609 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1238 transitions. [2024-10-31 21:56:11,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-31 21:56:11,611 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:56:11,612 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-10-31 21:56:11,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 21:56:11,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 21:56:11,814 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:56:11,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:11,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1224674226, now seen corresponding path program 1 times [2024-10-31 21:56:11,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:11,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742091084] [2024-10-31 21:56:11,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:11,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:11,928 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-31 21:56:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:11,949 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 21:56:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:12,031 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-10-31 21:56:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-31 21:56:12,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:12,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742091084] [2024-10-31 21:56:12,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742091084] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:12,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204481424] [2024-10-31 21:56:12,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:12,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:12,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:12,044 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:12,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 21:56:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:12,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 21:56:12,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:12,252 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 21:56:12,252 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:56:12,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204481424] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:12,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:56:12,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-10-31 21:56:12,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501496015] [2024-10-31 21:56:12,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:12,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:56:12,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:12,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:56:12,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-31 21:56:12,256 INFO L87 Difference]: Start difference. First operand 918 states and 1238 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 21:56:12,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:56:12,345 INFO L93 Difference]: Finished difference Result 1344 states and 1799 transitions. [2024-10-31 21:56:12,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:56:12,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2024-10-31 21:56:12,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:56:12,352 INFO L225 Difference]: With dead ends: 1344 [2024-10-31 21:56:12,353 INFO L226 Difference]: Without dead ends: 942 [2024-10-31 21:56:12,354 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-31 21:56:12,356 INFO L432 NwaCegarLoop]: 502 mSDtfsCounter, 0 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1996 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 21:56:12,357 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1996 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 21:56:12,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2024-10-31 21:56:12,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 942. [2024-10-31 21:56:12,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 837 states have (on average 1.3261648745519714) internal successors, (1110), 849 states have internal predecessors, (1110), 65 states have call successors, (65), 34 states have call predecessors, (65), 38 states have return successors, (87), 59 states have call predecessors, (87), 61 states have call successors, (87) [2024-10-31 21:56:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1262 transitions. [2024-10-31 21:56:12,425 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1262 transitions. Word has length 68 [2024-10-31 21:56:12,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:56:12,426 INFO L471 AbstractCegarLoop]: Abstraction has 942 states and 1262 transitions. [2024-10-31 21:56:12,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 21:56:12,427 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1262 transitions. [2024-10-31 21:56:12,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-31 21:56:12,429 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:56:12,429 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:12,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 21:56:12,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-31 21:56:12,634 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:56:12,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:12,635 INFO L85 PathProgramCache]: Analyzing trace with hash -637868212, now seen corresponding path program 1 times [2024-10-31 21:56:12,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:12,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072902532] [2024-10-31 21:56:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:12,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:12,715 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-31 21:56:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:12,725 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 21:56:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:12,781 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-10-31 21:56:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-31 21:56:12,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:12,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072902532] [2024-10-31 21:56:12,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072902532] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:12,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94351564] [2024-10-31 21:56:12,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:12,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:12,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:12,793 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:12,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 21:56:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:12,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 21:56:12,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:13,043 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:56:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-31 21:56:13,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94351564] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:13,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 21:56:13,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2024-10-31 21:56:13,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496878465] [2024-10-31 21:56:13,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:13,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:56:13,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:13,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:56:13,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-31 21:56:13,108 INFO L87 Difference]: Start difference. First operand 942 states and 1262 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 21:56:13,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:56:13,359 INFO L93 Difference]: Finished difference Result 994 states and 1324 transitions. [2024-10-31 21:56:13,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:56:13,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2024-10-31 21:56:13,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:56:13,365 INFO L225 Difference]: With dead ends: 994 [2024-10-31 21:56:13,365 INFO L226 Difference]: Without dead ends: 991 [2024-10-31 21:56:13,366 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-31 21:56:13,368 INFO L432 NwaCegarLoop]: 524 mSDtfsCounter, 901 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 21:56:13,369 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [901 Valid, 589 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 21:56:13,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2024-10-31 21:56:13,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 941. [2024-10-31 21:56:13,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 837 states have (on average 1.3237753882915173) internal successors, (1108), 848 states have internal predecessors, (1108), 64 states have call successors, (64), 34 states have call predecessors, (64), 38 states have return successors, (87), 59 states have call predecessors, (87), 61 states have call successors, (87) [2024-10-31 21:56:13,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1259 transitions. [2024-10-31 21:56:13,438 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1259 transitions. Word has length 68 [2024-10-31 21:56:13,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:56:13,439 INFO L471 AbstractCegarLoop]: Abstraction has 941 states and 1259 transitions. [2024-10-31 21:56:13,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 21:56:13,440 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1259 transitions. [2024-10-31 21:56:13,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-31 21:56:13,442 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:56:13,444 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:13,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 21:56:13,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-31 21:56:13,645 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:56:13,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:13,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1699860191, now seen corresponding path program 1 times [2024-10-31 21:56:13,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:13,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747160462] [2024-10-31 21:56:13,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:13,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:13,701 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-31 21:56:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:13,708 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 21:56:13,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:13,748 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-10-31 21:56:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:13,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-31 21:56:13,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:13,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747160462] [2024-10-31 21:56:13,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747160462] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:13,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756824528] [2024-10-31 21:56:13,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:13,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:13,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:13,757 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:13,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 21:56:13,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:13,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 21:56:13,891 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:14,296 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:56:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-31 21:56:14,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756824528] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:56:14,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:56:14,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2024-10-31 21:56:14,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343315506] [2024-10-31 21:56:14,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:56:14,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 21:56:14,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:14,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 21:56:14,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-10-31 21:56:14,393 INFO L87 Difference]: Start difference. First operand 941 states and 1259 transitions. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 10 states have internal predecessors, (146), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-10-31 21:56:16,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:56:16,216 INFO L93 Difference]: Finished difference Result 2270 states and 2958 transitions. [2024-10-31 21:56:16,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-10-31 21:56:16,217 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 10 states have internal predecessors, (146), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2024-10-31 21:56:16,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:56:16,227 INFO L225 Difference]: With dead ends: 2270 [2024-10-31 21:56:16,227 INFO L226 Difference]: Without dead ends: 1633 [2024-10-31 21:56:16,230 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=1566, Unknown=0, NotChecked=0, Total=1806 [2024-10-31 21:56:16,232 INFO L432 NwaCegarLoop]: 399 mSDtfsCounter, 1307 mSDsluCounter, 2145 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1335 SdHoareTripleChecker+Valid, 2544 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-31 21:56:16,233 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1335 Valid, 2544 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-31 21:56:16,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2024-10-31 21:56:16,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1157. [2024-10-31 21:56:16,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1035 states have (on average 1.2995169082125604) internal successors, (1345), 1050 states have internal predecessors, (1345), 73 states have call successors, (73), 41 states have call predecessors, (73), 47 states have return successors, (98), 66 states have call predecessors, (98), 70 states have call successors, (98) [2024-10-31 21:56:16,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1516 transitions. [2024-10-31 21:56:16,312 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1516 transitions. Word has length 69 [2024-10-31 21:56:16,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:56:16,313 INFO L471 AbstractCegarLoop]: Abstraction has 1157 states and 1516 transitions. [2024-10-31 21:56:16,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 10 states have internal predecessors, (146), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-10-31 21:56:16,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1516 transitions. [2024-10-31 21:56:16,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-10-31 21:56:16,316 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:56:16,316 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-10-31 21:56:16,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-31 21:56:16,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-31 21:56:16,517 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:56:16,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:16,517 INFO L85 PathProgramCache]: Analyzing trace with hash -651103349, now seen corresponding path program 1 times [2024-10-31 21:56:16,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:16,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993134198] [2024-10-31 21:56:16,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:16,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:16,578 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-31 21:56:16,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:16,587 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 21:56:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:16,597 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-31 21:56:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:16,605 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-10-31 21:56:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-31 21:56:16,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:16,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993134198] [2024-10-31 21:56:16,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993134198] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:16,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:16,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 21:56:16,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821254781] [2024-10-31 21:56:16,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:16,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:56:16,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:16,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:56:16,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:56:16,618 INFO L87 Difference]: Start difference. First operand 1157 states and 1516 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-31 21:56:17,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:56:17,185 INFO L93 Difference]: Finished difference Result 1869 states and 2392 transitions. [2024-10-31 21:56:17,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:56:17,186 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2024-10-31 21:56:17,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:56:17,192 INFO L225 Difference]: With dead ends: 1869 [2024-10-31 21:56:17,192 INFO L226 Difference]: Without dead ends: 1177 [2024-10-31 21:56:17,194 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:56:17,195 INFO L432 NwaCegarLoop]: 344 mSDtfsCounter, 673 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 21:56:17,196 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [695 Valid, 677 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 21:56:17,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2024-10-31 21:56:17,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1075. [2024-10-31 21:56:17,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 960 states have (on average 1.2927083333333333) internal successors, (1241), 975 states have internal predecessors, (1241), 70 states have call successors, (70), 38 states have call predecessors, (70), 43 states have return successors, (93), 62 states have call predecessors, (93), 67 states have call successors, (93) [2024-10-31 21:56:17,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 1404 transitions. [2024-10-31 21:56:17,285 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 1404 transitions. Word has length 88 [2024-10-31 21:56:17,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:56:17,285 INFO L471 AbstractCegarLoop]: Abstraction has 1075 states and 1404 transitions. [2024-10-31 21:56:17,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-31 21:56:17,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 1404 transitions. [2024-10-31 21:56:17,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-10-31 21:56:17,290 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:56:17,290 INFO L215 NwaCegarLoop]: trace histogram [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, 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] [2024-10-31 21:56:17,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 21:56:17,291 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:56:17,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:17,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1364600849, now seen corresponding path program 1 times [2024-10-31 21:56:17,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:17,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10134077] [2024-10-31 21:56:17,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:17,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:17,367 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-31 21:56:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:17,378 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 21:56:17,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:17,398 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-10-31 21:56:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:17,402 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-31 21:56:17,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:17,413 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-10-31 21:56:17,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:17,420 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-10-31 21:56:17,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:17,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10134077] [2024-10-31 21:56:17,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10134077] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:17,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11803807] [2024-10-31 21:56:17,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:17,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:17,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:17,425 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:17,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 21:56:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:17,549 INFO L255 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 21:56:17,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 21:56:17,572 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:56:17,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11803807] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:17,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:56:17,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-10-31 21:56:17,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436220526] [2024-10-31 21:56:17,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:17,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:56:17,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:17,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:56:17,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-31 21:56:17,576 INFO L87 Difference]: Start difference. First operand 1075 states and 1404 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-31 21:56:17,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:56:17,631 INFO L93 Difference]: Finished difference Result 1397 states and 1796 transitions. [2024-10-31 21:56:17,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:56:17,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2024-10-31 21:56:17,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:56:17,634 INFO L225 Difference]: With dead ends: 1397 [2024-10-31 21:56:17,634 INFO L226 Difference]: Without dead ends: 268 [2024-10-31 21:56:17,637 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-31 21:56:17,637 INFO L432 NwaCegarLoop]: 545 mSDtfsCounter, 60 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 21:56:17,637 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 1021 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 21:56:17,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2024-10-31 21:56:17,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2024-10-31 21:56:17,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 238 states have (on average 1.5420168067226891) internal successors, (367), 240 states have internal predecessors, (367), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-10-31 21:56:17,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 411 transitions. [2024-10-31 21:56:17,653 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 411 transitions. Word has length 103 [2024-10-31 21:56:17,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:56:17,653 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 411 transitions. [2024-10-31 21:56:17,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-31 21:56:17,654 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 411 transitions. [2024-10-31 21:56:17,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-10-31 21:56:17,656 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:56:17,656 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:17,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-31 21:56:17,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc4be7c1-4224-46b7-86a7-41c23a19cafa/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-31 21:56:17,858 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:56:17,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:17,859 INFO L85 PathProgramCache]: Analyzing trace with hash 535279623, now seen corresponding path program 1 times [2024-10-31 21:56:17,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:17,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036440497] [2024-10-31 21:56:17,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:17,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:17,907 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 21:56:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:17,985 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-31 21:56:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:18,015 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-31 21:56:18,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:18,031 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-10-31 21:56:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:18,040 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-10-31 21:56:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:18,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:18,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036440497] [2024-10-31 21:56:18,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036440497] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:18,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:18,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 21:56:18,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026871372] [2024-10-31 21:56:18,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:18,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:56:18,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:18,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:56:18,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:56:18,048 INFO L87 Difference]: Start difference. First operand 268 states and 411 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 21:56:19,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:56:19,448 INFO L93 Difference]: Finished difference Result 611 states and 953 transitions. [2024-10-31 21:56:19,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 21:56:19,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2024-10-31 21:56:19,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:56:19,452 INFO L225 Difference]: With dead ends: 611 [2024-10-31 21:56:19,452 INFO L226 Difference]: Without dead ends: 355 [2024-10-31 21:56:19,453 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-10-31 21:56:19,454 INFO L432 NwaCegarLoop]: 253 mSDtfsCounter, 680 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-31 21:56:19,455 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 549 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-31 21:56:19,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2024-10-31 21:56:19,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 268. [2024-10-31 21:56:19,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 238 states have (on average 1.5378151260504203) internal successors, (366), 240 states have internal predecessors, (366), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-10-31 21:56:19,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 410 transitions. [2024-10-31 21:56:19,507 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 410 transitions. Word has length 124 [2024-10-31 21:56:19,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:56:19,508 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 410 transitions. [2024-10-31 21:56:19,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 21:56:19,508 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 410 transitions. [2024-10-31 21:56:19,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-10-31 21:56:19,510 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:56:19,510 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:19,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 21:56:19,511 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:56:19,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:19,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2112324731, now seen corresponding path program 1 times [2024-10-31 21:56:19,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:19,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177115206] [2024-10-31 21:56:19,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:19,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:19,612 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 21:56:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:19,668 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-31 21:56:19,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:19,734 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-31 21:56:19,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:19,751 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-10-31 21:56:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:19,760 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-10-31 21:56:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:19,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:19,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177115206] [2024-10-31 21:56:19,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177115206] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:19,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:19,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 21:56:19,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341486509] [2024-10-31 21:56:19,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:19,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 21:56:19,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:19,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 21:56:19,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-31 21:56:19,767 INFO L87 Difference]: Start difference. First operand 268 states and 410 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 21:56:22,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:56:22,290 INFO L93 Difference]: Finished difference Result 954 states and 1497 transitions. [2024-10-31 21:56:22,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 21:56:22,291 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2024-10-31 21:56:22,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:56:22,295 INFO L225 Difference]: With dead ends: 954 [2024-10-31 21:56:22,295 INFO L226 Difference]: Without dead ends: 702 [2024-10-31 21:56:22,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-10-31 21:56:22,297 INFO L432 NwaCegarLoop]: 233 mSDtfsCounter, 1010 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:56:22,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1024 Valid, 935 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1430 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-10-31 21:56:22,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2024-10-31 21:56:22,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 527. [2024-10-31 21:56:22,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 474 states have (on average 1.5506329113924051) internal successors, (735), 477 states have internal predecessors, (735), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (40), 37 states have call predecessors, (40), 37 states have call successors, (40) [2024-10-31 21:56:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 814 transitions. [2024-10-31 21:56:22,393 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 814 transitions. Word has length 124 [2024-10-31 21:56:22,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:56:22,393 INFO L471 AbstractCegarLoop]: Abstraction has 527 states and 814 transitions. [2024-10-31 21:56:22,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 21:56:22,394 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 814 transitions. [2024-10-31 21:56:22,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-10-31 21:56:22,399 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:56:22,399 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:22,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 21:56:22,400 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:56:22,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:22,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1559360963, now seen corresponding path program 1 times [2024-10-31 21:56:22,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:22,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129702101] [2024-10-31 21:56:22,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:22,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:22,583 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 21:56:22,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:22,630 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-31 21:56:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:22,692 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-31 21:56:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:22,707 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-10-31 21:56:22,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:22,714 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-10-31 21:56:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:22,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:22,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129702101] [2024-10-31 21:56:22,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129702101] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:22,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:22,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-31 21:56:22,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26550664] [2024-10-31 21:56:22,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:22,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 21:56:22,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:22,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 21:56:22,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-31 21:56:22,723 INFO L87 Difference]: Start difference. First operand 527 states and 814 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 21:56:25,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:56:25,860 INFO L93 Difference]: Finished difference Result 1568 states and 2462 transitions. [2024-10-31 21:56:25,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 21:56:25,861 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2024-10-31 21:56:25,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:56:25,866 INFO L225 Difference]: With dead ends: 1568 [2024-10-31 21:56:25,866 INFO L226 Difference]: Without dead ends: 1057 [2024-10-31 21:56:25,868 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-10-31 21:56:25,869 INFO L432 NwaCegarLoop]: 410 mSDtfsCounter, 1021 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-10-31 21:56:25,869 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1035 Valid, 1801 Invalid, 2345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2290 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-10-31 21:56:25,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2024-10-31 21:56:25,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 769. [2024-10-31 21:56:25,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 693 states have (on average 1.544011544011544) internal successors, (1070), 697 states have internal predecessors, (1070), 55 states have call successors, (55), 19 states have call predecessors, (55), 20 states have return successors, (58), 54 states have call predecessors, (58), 53 states have call successors, (58) [2024-10-31 21:56:25,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1183 transitions. [2024-10-31 21:56:25,941 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1183 transitions. Word has length 124 [2024-10-31 21:56:25,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:56:25,942 INFO L471 AbstractCegarLoop]: Abstraction has 769 states and 1183 transitions. [2024-10-31 21:56:25,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 21:56:25,942 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1183 transitions. [2024-10-31 21:56:25,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-10-31 21:56:25,944 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:56:25,944 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:25,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-31 21:56:25,945 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:56:25,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:25,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1677802437, now seen corresponding path program 1 times [2024-10-31 21:56:25,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:25,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822195038] [2024-10-31 21:56:25,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:25,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:26,050 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 21:56:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:26,100 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-31 21:56:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:26,194 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-31 21:56:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:26,210 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-10-31 21:56:26,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:26,217 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-10-31 21:56:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:26,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:26,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:26,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822195038] [2024-10-31 21:56:26,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822195038] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:26,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:26,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-31 21:56:26,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312400399] [2024-10-31 21:56:26,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:26,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 21:56:26,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:26,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 21:56:26,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-31 21:56:26,223 INFO L87 Difference]: Start difference. First operand 769 states and 1183 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 21:56:29,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:56:29,166 INFO L93 Difference]: Finished difference Result 2473 states and 3875 transitions. [2024-10-31 21:56:29,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 21:56:29,167 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2024-10-31 21:56:29,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:56:29,176 INFO L225 Difference]: With dead ends: 2473 [2024-10-31 21:56:29,176 INFO L226 Difference]: Without dead ends: 1720 [2024-10-31 21:56:29,180 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-10-31 21:56:29,181 INFO L432 NwaCegarLoop]: 408 mSDtfsCounter, 1025 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 2281 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1039 SdHoareTripleChecker+Valid, 1799 SdHoareTripleChecker+Invalid, 2338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-10-31 21:56:29,181 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1039 Valid, 1799 Invalid, 2338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2281 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-10-31 21:56:29,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2024-10-31 21:56:29,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 1254. [2024-10-31 21:56:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1132 states have (on average 1.5379858657243817) internal successors, (1741), 1138 states have internal predecessors, (1741), 87 states have call successors, (87), 31 states have call predecessors, (87), 34 states have return successors, (98), 88 states have call predecessors, (98), 85 states have call successors, (98) [2024-10-31 21:56:29,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1926 transitions. [2024-10-31 21:56:29,321 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1926 transitions. Word has length 124 [2024-10-31 21:56:29,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:56:29,321 INFO L471 AbstractCegarLoop]: Abstraction has 1254 states and 1926 transitions. [2024-10-31 21:56:29,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 21:56:29,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1926 transitions. [2024-10-31 21:56:29,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-10-31 21:56:29,324 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:56:29,324 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:29,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-31 21:56:29,324 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:56:29,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:29,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1227870845, now seen corresponding path program 1 times [2024-10-31 21:56:29,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:29,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310550400] [2024-10-31 21:56:29,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:29,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:29,433 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 21:56:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:29,490 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-31 21:56:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:29,559 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-31 21:56:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:29,575 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-10-31 21:56:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:29,582 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-10-31 21:56:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:29,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:29,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:29,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310550400] [2024-10-31 21:56:29,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310550400] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:29,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:29,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-31 21:56:29,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653119987] [2024-10-31 21:56:29,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:29,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 21:56:29,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:29,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 21:56:29,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-31 21:56:29,588 INFO L87 Difference]: Start difference. First operand 1254 states and 1926 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)