./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e8ee20bd48f38d06d172550f7b4afad7a85599a8fd397bba890e4eeccd52db93 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 20:58:34,317 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 20:58:34,412 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 20:58:34,424 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 20:58:34,425 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 20:58:34,483 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 20:58:34,486 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 20:58:34,486 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 20:58:34,487 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 20:58:34,492 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 20:58:34,493 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 20:58:34,494 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 20:58:34,495 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 20:58:34,496 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 20:58:34,497 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 20:58:34,498 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 20:58:34,498 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 20:58:34,507 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 20:58:34,508 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 20:58:34,508 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 20:58:34,510 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 20:58:34,510 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 20:58:34,511 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 20:58:34,511 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 20:58:34,511 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 20:58:34,512 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 20:58:34,512 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 20:58:34,513 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 20:58:34,513 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 20:58:34,514 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 20:58:34,515 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 20:58:34,515 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:58:34,516 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 20:58:34,516 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 20:58:34,516 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 20:58:34,516 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 20:58:34,516 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 20:58:34,517 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 20:58:34,517 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 20:58:34,517 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 20:58:34,517 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 20:58:34,517 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 20:58:34,518 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_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8ee20bd48f38d06d172550f7b4afad7a85599a8fd397bba890e4eeccd52db93 [2023-11-21 20:58:34,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 20:58:34,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 20:58:34,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 20:58:34,807 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 20:58:34,807 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 20:58:34,809 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c [2023-11-21 20:58:37,892 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 20:58:38,175 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 20:58:38,176 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c [2023-11-21 20:58:38,193 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/data/b3e3a200b/ff7515b6e6d346e7ba53dced63311693/FLAGde74a9fb1 [2023-11-21 20:58:38,209 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/data/b3e3a200b/ff7515b6e6d346e7ba53dced63311693 [2023-11-21 20:58:38,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 20:58:38,213 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 20:58:38,215 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 20:58:38,215 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 20:58:38,221 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 20:58:38,222 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:58:38" (1/1) ... [2023-11-21 20:58:38,223 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60efef8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:38, skipping insertion in model container [2023-11-21 20:58:38,223 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:58:38" (1/1) ... [2023-11-21 20:58:38,293 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 20:58:38,452 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[913,926] [2023-11-21 20:58:38,519 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[5977,5990] [2023-11-21 20:58:38,671 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:58:38,700 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 20:58:38,720 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[913,926] [2023-11-21 20:58:38,756 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[5977,5990] [2023-11-21 20:58:38,833 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:58:38,859 INFO L206 MainTranslator]: Completed translation [2023-11-21 20:58:38,860 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:38 WrapperNode [2023-11-21 20:58:38,860 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 20:58:38,861 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 20:58:38,861 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 20:58:38,861 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 20:58:38,868 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:38" (1/1) ... [2023-11-21 20:58:38,884 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:38" (1/1) ... [2023-11-21 20:58:38,948 INFO L138 Inliner]: procedures = 64, calls = 73, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 851 [2023-11-21 20:58:38,948 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 20:58:38,949 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 20:58:38,950 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 20:58:38,950 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 20:58:38,966 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:38" (1/1) ... [2023-11-21 20:58:38,966 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:38" (1/1) ... [2023-11-21 20:58:38,972 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:38" (1/1) ... [2023-11-21 20:58:38,999 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 20:58:38,999 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:38" (1/1) ... [2023-11-21 20:58:38,999 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:38" (1/1) ... [2023-11-21 20:58:39,026 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:38" (1/1) ... [2023-11-21 20:58:39,062 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:38" (1/1) ... [2023-11-21 20:58:39,065 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:38" (1/1) ... [2023-11-21 20:58:39,079 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:38" (1/1) ... [2023-11-21 20:58:39,089 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 20:58:39,090 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 20:58:39,091 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 20:58:39,091 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 20:58:39,092 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:38" (1/1) ... [2023-11-21 20:58:39,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:58:39,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:39,126 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 20:58:39,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 20:58:39,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 20:58:39,179 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-21 20:58:39,179 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-21 20:58:39,179 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2023-11-21 20:58:39,181 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2023-11-21 20:58:39,182 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-21 20:58:39,183 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-21 20:58:39,183 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-21 20:58:39,183 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-21 20:58:39,183 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-21 20:58:39,183 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-21 20:58:39,184 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-21 20:58:39,184 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-21 20:58:39,184 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-21 20:58:39,184 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-21 20:58:39,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 20:58:39,185 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-21 20:58:39,185 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-21 20:58:39,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 20:58:39,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 20:58:39,186 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-21 20:58:39,186 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-21 20:58:39,186 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-11-21 20:58:39,187 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-11-21 20:58:39,360 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 20:58:39,363 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 20:58:40,274 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 20:58:40,922 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 20:58:40,922 INFO L308 CfgBuilder]: Removed 15 assume(true) statements. [2023-11-21 20:58:40,924 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:58:40 BoogieIcfgContainer [2023-11-21 20:58:40,924 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 20:58:40,928 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 20:58:40,928 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 20:58:40,932 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 20:58:40,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 08:58:38" (1/3) ... [2023-11-21 20:58:40,933 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef7cfb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:58:40, skipping insertion in model container [2023-11-21 20:58:40,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:58:38" (2/3) ... [2023-11-21 20:58:40,936 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef7cfb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:58:40, skipping insertion in model container [2023-11-21 20:58:40,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:58:40" (3/3) ... [2023-11-21 20:58:40,939 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.08.cil-2.c [2023-11-21 20:58:40,961 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 20:58:40,962 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-21 20:58:41,041 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 20:58:41,050 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6fbae2b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 20:58:41,050 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-21 20:58:41,057 INFO L276 IsEmpty]: Start isEmpty. Operand has 210 states, 167 states have (on average 1.532934131736527) internal successors, (256), 174 states have internal predecessors, (256), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-21 20:58:41,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-21 20:58:41,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:41,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:41,072 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:41,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:41,081 INFO L85 PathProgramCache]: Analyzing trace with hash -820561304, now seen corresponding path program 1 times [2023-11-21 20:58:41,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:41,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762620166] [2023-11-21 20:58:41,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:41,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:41,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-21 20:58:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:41,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-21 20:58:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:41,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:41,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762620166] [2023-11-21 20:58:41,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762620166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:41,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:41,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 20:58:41,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555809170] [2023-11-21 20:58:41,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:41,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 20:58:41,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:41,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 20:58:41,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 20:58:41,612 INFO L87 Difference]: Start difference. First operand has 210 states, 167 states have (on average 1.532934131736527) internal successors, (256), 174 states have internal predecessors, (256), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-11-21 20:58:42,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:42,183 INFO L93 Difference]: Finished difference Result 452 states and 680 transitions. [2023-11-21 20:58:42,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 20:58:42,186 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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 28 [2023-11-21 20:58:42,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:42,199 INFO L225 Difference]: With dead ends: 452 [2023-11-21 20:58:42,199 INFO L226 Difference]: Without dead ends: 242 [2023-11-21 20:58:42,205 INFO L412 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 [2023-11-21 20:58:42,209 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 333 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:42,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 380 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 20:58:42,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-11-21 20:58:42,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 238. [2023-11-21 20:58:42,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 193 states have (on average 1.4663212435233162) internal successors, (283), 197 states have internal predecessors, (283), 33 states have call successors, (33), 12 states have call predecessors, (33), 10 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-21 20:58:42,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 345 transitions. [2023-11-21 20:58:42,311 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 345 transitions. Word has length 28 [2023-11-21 20:58:42,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:42,313 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 345 transitions. [2023-11-21 20:58:42,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-11-21 20:58:42,314 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 345 transitions. [2023-11-21 20:58:42,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-21 20:58:42,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:42,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:42,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 20:58:42,320 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:42,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:42,321 INFO L85 PathProgramCache]: Analyzing trace with hash 680799331, now seen corresponding path program 1 times [2023-11-21 20:58:42,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:42,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149163494] [2023-11-21 20:58:42,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:42,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:42,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-21 20:58:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:42,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 20:58:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:42,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:42,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149163494] [2023-11-21 20:58:42,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149163494] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:42,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:42,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 20:58:42,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863543266] [2023-11-21 20:58:42,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:42,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 20:58:42,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:42,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 20:58:42,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 20:58:42,459 INFO L87 Difference]: Start difference. First operand 238 states and 345 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2023-11-21 20:58:42,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:42,897 INFO L93 Difference]: Finished difference Result 394 states and 562 transitions. [2023-11-21 20:58:42,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 20:58:42,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 29 [2023-11-21 20:58:42,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:42,905 INFO L225 Difference]: With dead ends: 394 [2023-11-21 20:58:42,905 INFO L226 Difference]: Without dead ends: 313 [2023-11-21 20:58:42,909 INFO L412 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 [2023-11-21 20:58:42,911 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 332 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:42,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 384 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 20:58:42,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-11-21 20:58:42,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 309. [2023-11-21 20:58:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 253 states have (on average 1.4387351778656126) internal successors, (364), 257 states have internal predecessors, (364), 40 states have call successors, (40), 16 states have call predecessors, (40), 14 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2023-11-21 20:58:42,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 440 transitions. [2023-11-21 20:58:42,966 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 440 transitions. Word has length 29 [2023-11-21 20:58:42,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:42,966 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 440 transitions. [2023-11-21 20:58:42,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2023-11-21 20:58:42,967 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 440 transitions. [2023-11-21 20:58:42,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-21 20:58:42,973 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:42,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:42,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 20:58:42,975 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:42,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:42,979 INFO L85 PathProgramCache]: Analyzing trace with hash -141488775, now seen corresponding path program 1 times [2023-11-21 20:58:42,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:42,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963946588] [2023-11-21 20:58:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:42,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:43,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-21 20:58:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:43,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-21 20:58:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:43,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:43,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963946588] [2023-11-21 20:58:43,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963946588] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:43,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:43,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 20:58:43,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088730778] [2023-11-21 20:58:43,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:43,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 20:58:43,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:43,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 20:58:43,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 20:58:43,070 INFO L87 Difference]: Start difference. First operand 309 states and 440 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2023-11-21 20:58:43,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:43,456 INFO L93 Difference]: Finished difference Result 549 states and 768 transitions. [2023-11-21 20:58:43,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 20:58:43,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 30 [2023-11-21 20:58:43,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:43,460 INFO L225 Difference]: With dead ends: 549 [2023-11-21 20:58:43,460 INFO L226 Difference]: Without dead ends: 397 [2023-11-21 20:58:43,461 INFO L412 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 [2023-11-21 20:58:43,462 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 116 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:43,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 515 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 20:58:43,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-11-21 20:58:43,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 383. [2023-11-21 20:58:43,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 316 states have (on average 1.4208860759493671) internal successors, (449), 322 states have internal predecessors, (449), 46 states have call successors, (46), 21 states have call predecessors, (46), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-21 20:58:43,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 537 transitions. [2023-11-21 20:58:43,492 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 537 transitions. Word has length 30 [2023-11-21 20:58:43,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:43,493 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 537 transitions. [2023-11-21 20:58:43,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2023-11-21 20:58:43,493 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 537 transitions. [2023-11-21 20:58:43,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-21 20:58:43,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:43,495 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-21 20:58:43,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 20:58:43,496 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:43,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:43,496 INFO L85 PathProgramCache]: Analyzing trace with hash -104997204, now seen corresponding path program 1 times [2023-11-21 20:58:43,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:43,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094168625] [2023-11-21 20:58:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:43,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:43,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-21 20:58:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:43,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-21 20:58:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:43,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-21 20:58:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 20:58:43,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:43,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094168625] [2023-11-21 20:58:43,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094168625] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:43,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:43,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 20:58:43,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93409867] [2023-11-21 20:58:43,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:43,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 20:58:43,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:43,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 20:58:43,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 20:58:43,594 INFO L87 Difference]: Start difference. First operand 383 states and 537 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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) [2023-11-21 20:58:43,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:43,978 INFO L93 Difference]: Finished difference Result 546 states and 755 transitions. [2023-11-21 20:58:43,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 20:58:43,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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 43 [2023-11-21 20:58:43,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:43,984 INFO L225 Difference]: With dead ends: 546 [2023-11-21 20:58:43,984 INFO L226 Difference]: Without dead ends: 388 [2023-11-21 20:58:43,985 INFO L412 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 [2023-11-21 20:58:43,986 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 101 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:43,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 559 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 20:58:43,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2023-11-21 20:58:44,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 377. [2023-11-21 20:58:44,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 310 states have (on average 1.403225806451613) internal successors, (435), 316 states have internal predecessors, (435), 46 states have call successors, (46), 21 states have call predecessors, (46), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-21 20:58:44,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 523 transitions. [2023-11-21 20:58:44,017 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 523 transitions. Word has length 43 [2023-11-21 20:58:44,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:44,017 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 523 transitions. [2023-11-21 20:58:44,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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) [2023-11-21 20:58:44,018 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 523 transitions. [2023-11-21 20:58:44,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-21 20:58:44,020 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:44,020 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-21 20:58:44,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 20:58:44,020 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:44,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:44,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1128653608, now seen corresponding path program 1 times [2023-11-21 20:58:44,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:44,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28191949] [2023-11-21 20:58:44,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:44,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:44,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:44,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-21 20:58:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:44,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 20:58:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:44,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 20:58:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-21 20:58:44,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:44,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28191949] [2023-11-21 20:58:44,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28191949] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:44,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:44,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 20:58:44,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184141270] [2023-11-21 20:58:44,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:44,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 20:58:44,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:44,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 20:58:44,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 20:58:44,096 INFO L87 Difference]: Start difference. First operand 377 states and 523 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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) [2023-11-21 20:58:44,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:44,436 INFO L93 Difference]: Finished difference Result 626 states and 847 transitions. [2023-11-21 20:58:44,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 20:58:44,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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 46 [2023-11-21 20:58:44,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:44,440 INFO L225 Difference]: With dead ends: 626 [2023-11-21 20:58:44,440 INFO L226 Difference]: Without dead ends: 423 [2023-11-21 20:58:44,441 INFO L412 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 [2023-11-21 20:58:44,442 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 314 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:44,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 384 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 20:58:44,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2023-11-21 20:58:44,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2023-11-21 20:58:44,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 349 states have (on average 1.3696275071633237) internal successors, (478), 355 states have internal predecessors, (478), 50 states have call successors, (50), 24 states have call predecessors, (50), 22 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-21 20:58:44,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 574 transitions. [2023-11-21 20:58:44,493 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 574 transitions. Word has length 46 [2023-11-21 20:58:44,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:44,493 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 574 transitions. [2023-11-21 20:58:44,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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) [2023-11-21 20:58:44,494 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 574 transitions. [2023-11-21 20:58:44,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-21 20:58:44,496 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:44,496 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:44,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 20:58:44,496 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:44,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:44,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2100387233, now seen corresponding path program 1 times [2023-11-21 20:58:44,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:44,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402391831] [2023-11-21 20:58:44,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:44,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:44,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-21 20:58:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:44,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-21 20:58:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:44,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-21 20:58:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 20:58:44,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:44,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402391831] [2023-11-21 20:58:44,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402391831] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:44,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:44,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 20:58:44,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053184520] [2023-11-21 20:58:44,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:44,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:58:44,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:44,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:58:44,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:58:44,620 INFO L87 Difference]: Start difference. First operand 423 states and 574 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 4 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) [2023-11-21 20:58:45,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:45,113 INFO L93 Difference]: Finished difference Result 463 states and 621 transitions. [2023-11-21 20:58:45,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 20:58:45,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 4 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 47 [2023-11-21 20:58:45,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:45,120 INFO L225 Difference]: With dead ends: 463 [2023-11-21 20:58:45,120 INFO L226 Difference]: Without dead ends: 460 [2023-11-21 20:58:45,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:58:45,127 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 557 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:45,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 392 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 20:58:45,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2023-11-21 20:58:45,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 422. [2023-11-21 20:58:45,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 349 states have (on average 1.3638968481375358) internal successors, (476), 354 states have internal predecessors, (476), 49 states have call successors, (49), 24 states have call predecessors, (49), 22 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-21 20:58:45,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 571 transitions. [2023-11-21 20:58:45,176 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 571 transitions. Word has length 47 [2023-11-21 20:58:45,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:45,177 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 571 transitions. [2023-11-21 20:58:45,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 4 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) [2023-11-21 20:58:45,177 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 571 transitions. [2023-11-21 20:58:45,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-21 20:58:45,179 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:45,179 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-21 20:58:45,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 20:58:45,180 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:45,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:45,181 INFO L85 PathProgramCache]: Analyzing trace with hash 686358731, now seen corresponding path program 1 times [2023-11-21 20:58:45,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:45,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660217283] [2023-11-21 20:58:45,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:45,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:45,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-21 20:58:45,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:45,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-21 20:58:45,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:45,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-21 20:58:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 20:58:45,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:45,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660217283] [2023-11-21 20:58:45,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660217283] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:45,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372924263] [2023-11-21 20:58:45,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:45,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:45,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:45,364 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:45,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 20:58:45,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:45,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 20:58:45,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:45,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:45,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:58:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 20:58:45,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372924263] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:58:45,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 20:58:45,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2023-11-21 20:58:45,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862512256] [2023-11-21 20:58:45,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 20:58:45,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 20:58:45,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:45,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 20:58:45,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:58:45,872 INFO L87 Difference]: Start difference. First operand 422 states and 571 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 6 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-21 20:58:46,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:46,519 INFO L93 Difference]: Finished difference Result 865 states and 1139 transitions. [2023-11-21 20:58:46,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 20:58:46,519 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 6 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2023-11-21 20:58:46,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:46,527 INFO L225 Difference]: With dead ends: 865 [2023-11-21 20:58:46,528 INFO L226 Difference]: Without dead ends: 862 [2023-11-21 20:58:46,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-21 20:58:46,530 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 481 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:46,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 898 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 20:58:46,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2023-11-21 20:58:46,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 631. [2023-11-21 20:58:46,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 526 states have (on average 1.3479087452471483) internal successors, (709), 533 states have internal predecessors, (709), 68 states have call successors, (68), 37 states have call predecessors, (68), 35 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-21 20:58:46,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 842 transitions. [2023-11-21 20:58:46,608 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 842 transitions. Word has length 48 [2023-11-21 20:58:46,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:46,610 INFO L495 AbstractCegarLoop]: Abstraction has 631 states and 842 transitions. [2023-11-21 20:58:46,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 6 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-21 20:58:46,611 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 842 transitions. [2023-11-21 20:58:46,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-21 20:58:46,613 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:46,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:46,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:46,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:46,828 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:46,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:46,829 INFO L85 PathProgramCache]: Analyzing trace with hash -369960255, now seen corresponding path program 1 times [2023-11-21 20:58:46,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:46,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167681637] [2023-11-21 20:58:46,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:46,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:46,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:58:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:46,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:58:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:47,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:58:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:47,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-21 20:58:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:47,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-21 20:58:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:47,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:47,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167681637] [2023-11-21 20:58:47,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167681637] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:47,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:47,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 20:58:47,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564497599] [2023-11-21 20:58:47,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:47,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 20:58:47,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:47,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 20:58:47,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 20:58:47,110 INFO L87 Difference]: Start difference. First operand 631 states and 842 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 20:58:48,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:48,784 INFO L93 Difference]: Finished difference Result 921 states and 1283 transitions. [2023-11-21 20:58:48,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 20:58:48,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 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 56 [2023-11-21 20:58:48,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:48,790 INFO L225 Difference]: With dead ends: 921 [2023-11-21 20:58:48,790 INFO L226 Difference]: Without dead ends: 770 [2023-11-21 20:58:48,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-21 20:58:48,792 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 582 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:48,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 891 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-21 20:58:48,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2023-11-21 20:58:48,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 769. [2023-11-21 20:58:48,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 640 states have (on average 1.365625) internal successors, (874), 648 states have internal predecessors, (874), 86 states have call successors, (86), 43 states have call predecessors, (86), 41 states have return successors, (83), 78 states have call predecessors, (83), 83 states have call successors, (83) [2023-11-21 20:58:48,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1043 transitions. [2023-11-21 20:58:48,905 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1043 transitions. Word has length 56 [2023-11-21 20:58:48,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:48,905 INFO L495 AbstractCegarLoop]: Abstraction has 769 states and 1043 transitions. [2023-11-21 20:58:48,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 20:58:48,905 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1043 transitions. [2023-11-21 20:58:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-21 20:58:48,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:48,908 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2023-11-21 20:58:48,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 20:58:48,908 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:48,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:48,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1605400330, now seen corresponding path program 2 times [2023-11-21 20:58:48,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:48,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789543379] [2023-11-21 20:58:48,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:48,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:48,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-21 20:58:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:48,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-21 20:58:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:48,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-21 20:58:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:48,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 20:58:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-21 20:58:48,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:48,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789543379] [2023-11-21 20:58:48,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789543379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:48,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:48,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 20:58:48,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065235949] [2023-11-21 20:58:48,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:48,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 20:58:48,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:48,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 20:58:48,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 20:58:48,993 INFO L87 Difference]: Start difference. First operand 769 states and 1043 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 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) [2023-11-21 20:58:49,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:49,412 INFO L93 Difference]: Finished difference Result 1099 states and 1476 transitions. [2023-11-21 20:58:49,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 20:58:49,413 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), 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 61 [2023-11-21 20:58:49,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:49,418 INFO L225 Difference]: With dead ends: 1099 [2023-11-21 20:58:49,418 INFO L226 Difference]: Without dead ends: 711 [2023-11-21 20:58:49,419 INFO L412 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 [2023-11-21 20:58:49,422 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 325 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:49,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 412 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 20:58:49,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2023-11-21 20:58:49,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 702. [2023-11-21 20:58:49,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 583 states have (on average 1.3602058319039452) internal successors, (793), 592 states have internal predecessors, (793), 80 states have call successors, (80), 39 states have call predecessors, (80), 37 states have return successors, (77), 71 states have call predecessors, (77), 77 states have call successors, (77) [2023-11-21 20:58:49,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 950 transitions. [2023-11-21 20:58:49,522 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 950 transitions. Word has length 61 [2023-11-21 20:58:49,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:49,522 INFO L495 AbstractCegarLoop]: Abstraction has 702 states and 950 transitions. [2023-11-21 20:58:49,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 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) [2023-11-21 20:58:49,522 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 950 transitions. [2023-11-21 20:58:49,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-21 20:58:49,525 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:49,526 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:49,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 20:58:49,526 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:49,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:49,527 INFO L85 PathProgramCache]: Analyzing trace with hash 351497186, now seen corresponding path program 1 times [2023-11-21 20:58:49,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:49,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348384874] [2023-11-21 20:58:49,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:49,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:49,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-21 20:58:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:49,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-21 20:58:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:49,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-21 20:58:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:49,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-21 20:58:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:49,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-21 20:58:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-21 20:58:49,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:49,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348384874] [2023-11-21 20:58:49,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348384874] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:49,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779043919] [2023-11-21 20:58:49,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:49,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:49,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:49,768 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:49,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 20:58:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:49,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 20:58:49,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:49,929 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 20:58:49,929 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:58:49,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779043919] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:49,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:58:49,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-21 20:58:49,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504758119] [2023-11-21 20:58:49,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:49,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:58:49,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:49,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:58:49,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 20:58:49,932 INFO L87 Difference]: Start difference. First operand 702 states and 950 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-21 20:58:50,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:50,108 INFO L93 Difference]: Finished difference Result 829 states and 1109 transitions. [2023-11-21 20:58:50,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:58:50,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2023-11-21 20:58:50,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:50,112 INFO L225 Difference]: With dead ends: 829 [2023-11-21 20:58:50,112 INFO L226 Difference]: Without dead ends: 295 [2023-11-21 20:58:50,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 20:58:50,114 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 25 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:50,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 506 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:58:50,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-11-21 20:58:50,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2023-11-21 20:58:50,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 240 states have (on average 1.4625) internal successors, (351), 243 states have internal predecessors, (351), 42 states have call successors, (42), 13 states have call predecessors, (42), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-21 20:58:50,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 433 transitions. [2023-11-21 20:58:50,165 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 433 transitions. Word has length 73 [2023-11-21 20:58:50,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:50,165 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 433 transitions. [2023-11-21 20:58:50,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-21 20:58:50,166 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 433 transitions. [2023-11-21 20:58:50,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-21 20:58:50,172 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:50,172 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:50,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:50,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-21 20:58:50,388 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:50,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:50,389 INFO L85 PathProgramCache]: Analyzing trace with hash 308980725, now seen corresponding path program 1 times [2023-11-21 20:58:50,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:50,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761757931] [2023-11-21 20:58:50,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:50,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:50,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:58:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:50,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:58:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:50,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:58:50,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:50,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-21 20:58:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:50,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-21 20:58:50,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:50,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 20:58:50,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:50,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:58:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:50,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-21 20:58:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 20:58:50,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:50,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761757931] [2023-11-21 20:58:50,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761757931] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:50,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815409790] [2023-11-21 20:58:50,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:50,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:50,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:50,748 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:50,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 20:58:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:50,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 20:58:50,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-21 20:58:51,030 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:58:51,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815409790] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:51,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:58:51,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 20:58:51,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051337442] [2023-11-21 20:58:51,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:51,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:58:51,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:51,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:58:51,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:58:51,032 INFO L87 Difference]: Start difference. First operand 295 states and 433 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 20:58:51,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:51,231 INFO L93 Difference]: Finished difference Result 866 states and 1292 transitions. [2023-11-21 20:58:51,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:58:51,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2023-11-21 20:58:51,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:51,236 INFO L225 Difference]: With dead ends: 866 [2023-11-21 20:58:51,236 INFO L226 Difference]: Without dead ends: 577 [2023-11-21 20:58:51,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:58:51,238 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 207 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:51,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 426 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:58:51,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2023-11-21 20:58:51,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 571. [2023-11-21 20:58:51,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 470 states have (on average 1.4595744680851064) internal successors, (686), 474 states have internal predecessors, (686), 76 states have call successors, (76), 25 states have call predecessors, (76), 24 states have return successors, (74), 72 states have call predecessors, (74), 74 states have call successors, (74) [2023-11-21 20:58:51,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 836 transitions. [2023-11-21 20:58:51,304 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 836 transitions. Word has length 110 [2023-11-21 20:58:51,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:51,304 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 836 transitions. [2023-11-21 20:58:51,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 20:58:51,305 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 836 transitions. [2023-11-21 20:58:51,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-21 20:58:51,308 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:51,308 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:51,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:51,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-21 20:58:51,517 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:51,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:51,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1435966891, now seen corresponding path program 1 times [2023-11-21 20:58:51,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:51,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715787256] [2023-11-21 20:58:51,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:51,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:51,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:58:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:51,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:58:51,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:51,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:58:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:51,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-21 20:58:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:51,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-21 20:58:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:51,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 20:58:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:51,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:58:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:51,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-21 20:58:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 20:58:51,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:51,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715787256] [2023-11-21 20:58:51,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715787256] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:51,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743221225] [2023-11-21 20:58:51,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:51,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:51,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:51,853 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:51,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 20:58:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:52,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 20:58:52,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-21 20:58:52,138 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:58:52,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743221225] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:52,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:58:52,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 20:58:52,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46820747] [2023-11-21 20:58:52,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:52,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:58:52,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:52,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:58:52,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:58:52,140 INFO L87 Difference]: Start difference. First operand 571 states and 836 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 20:58:52,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:52,399 INFO L93 Difference]: Finished difference Result 1688 states and 2511 transitions. [2023-11-21 20:58:52,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:58:52,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2023-11-21 20:58:52,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:52,408 INFO L225 Difference]: With dead ends: 1688 [2023-11-21 20:58:52,408 INFO L226 Difference]: Without dead ends: 1123 [2023-11-21 20:58:52,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:58:52,411 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 192 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:52,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 373 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:58:52,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2023-11-21 20:58:52,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 1115. [2023-11-21 20:58:52,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 924 states have (on average 1.4545454545454546) internal successors, (1344), 930 states have internal predecessors, (1344), 142 states have call successors, (142), 49 states have call predecessors, (142), 48 states have return successors, (140), 136 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-21 20:58:52,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1626 transitions. [2023-11-21 20:58:52,552 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1626 transitions. Word has length 110 [2023-11-21 20:58:52,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:52,552 INFO L495 AbstractCegarLoop]: Abstraction has 1115 states and 1626 transitions. [2023-11-21 20:58:52,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 20:58:52,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1626 transitions. [2023-11-21 20:58:52,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-21 20:58:52,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:52,557 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:52,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:52,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-21 20:58:52,772 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:52,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:52,773 INFO L85 PathProgramCache]: Analyzing trace with hash 5289973, now seen corresponding path program 1 times [2023-11-21 20:58:52,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:52,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678934215] [2023-11-21 20:58:52,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:52,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:52,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:58:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:52,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:58:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:53,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:58:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:53,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-21 20:58:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:53,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-21 20:58:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:53,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 20:58:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:53,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:58:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:53,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-21 20:58:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 20:58:53,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:53,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678934215] [2023-11-21 20:58:53,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678934215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:53,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096959249] [2023-11-21 20:58:53,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:53,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:53,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:53,192 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:53,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 20:58:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:53,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 20:58:53,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-21 20:58:53,509 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:58:53,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096959249] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:53,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:58:53,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 20:58:53,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614093563] [2023-11-21 20:58:53,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:53,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:58:53,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:53,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:58:53,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:58:53,513 INFO L87 Difference]: Start difference. First operand 1115 states and 1626 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 20:58:53,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:53,906 INFO L93 Difference]: Finished difference Result 3308 states and 4899 transitions. [2023-11-21 20:58:53,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:58:53,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2023-11-21 20:58:53,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:53,922 INFO L225 Difference]: With dead ends: 3308 [2023-11-21 20:58:53,923 INFO L226 Difference]: Without dead ends: 2199 [2023-11-21 20:58:53,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:58:53,929 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 201 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:53,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 373 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:58:53,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2023-11-21 20:58:54,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 2187. [2023-11-21 20:58:54,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 1820 states have (on average 1.4483516483516483) internal successors, (2636), 1830 states have internal predecessors, (2636), 270 states have call successors, (270), 97 states have call predecessors, (270), 96 states have return successors, (268), 260 states have call predecessors, (268), 268 states have call successors, (268) [2023-11-21 20:58:54,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3174 transitions. [2023-11-21 20:58:54,238 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3174 transitions. Word has length 110 [2023-11-21 20:58:54,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:54,238 INFO L495 AbstractCegarLoop]: Abstraction has 2187 states and 3174 transitions. [2023-11-21 20:58:54,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 20:58:54,239 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3174 transitions. [2023-11-21 20:58:54,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-21 20:58:54,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:54,246 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:54,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:54,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-21 20:58:54,464 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:54,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:54,465 INFO L85 PathProgramCache]: Analyzing trace with hash 659502677, now seen corresponding path program 1 times [2023-11-21 20:58:54,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:54,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451583980] [2023-11-21 20:58:54,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:54,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:54,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:54,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:58:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:54,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:58:54,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:54,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:58:54,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:54,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-21 20:58:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:54,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-21 20:58:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:54,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 20:58:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:54,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:58:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:54,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-21 20:58:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:54,814 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 20:58:54,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:54,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451583980] [2023-11-21 20:58:54,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451583980] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:54,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225608908] [2023-11-21 20:58:54,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:54,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:54,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:54,817 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:54,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 20:58:55,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:55,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 20:58:55,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-21 20:58:55,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:58:55,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225608908] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:55,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:58:55,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 20:58:55,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95386671] [2023-11-21 20:58:55,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:55,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:58:55,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:55,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:58:55,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:58:55,136 INFO L87 Difference]: Start difference. First operand 2187 states and 3174 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 20:58:55,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:55,698 INFO L93 Difference]: Finished difference Result 6500 states and 9575 transitions. [2023-11-21 20:58:55,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:58:55,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2023-11-21 20:58:55,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:55,728 INFO L225 Difference]: With dead ends: 6500 [2023-11-21 20:58:55,728 INFO L226 Difference]: Without dead ends: 4319 [2023-11-21 20:58:55,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:58:55,737 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 198 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:55,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 373 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:58:55,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4319 states. [2023-11-21 20:58:56,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4319 to 4299. [2023-11-21 20:58:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4299 states, 3588 states have (on average 1.4414715719063544) internal successors, (5172), 3606 states have internal predecessors, (5172), 518 states have call successors, (518), 193 states have call predecessors, (518), 192 states have return successors, (516), 500 states have call predecessors, (516), 516 states have call successors, (516) [2023-11-21 20:58:56,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4299 states to 4299 states and 6206 transitions. [2023-11-21 20:58:56,334 INFO L78 Accepts]: Start accepts. Automaton has 4299 states and 6206 transitions. Word has length 110 [2023-11-21 20:58:56,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:56,334 INFO L495 AbstractCegarLoop]: Abstraction has 4299 states and 6206 transitions. [2023-11-21 20:58:56,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 20:58:56,335 INFO L276 IsEmpty]: Start isEmpty. Operand 4299 states and 6206 transitions. [2023-11-21 20:58:56,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-21 20:58:56,344 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:56,345 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:56,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:56,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4f0bbeb-5a6a-4878-baac-2ea69e0a4ad6/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-21 20:58:56,571 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:56,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:56,572 INFO L85 PathProgramCache]: Analyzing trace with hash -752331787, now seen corresponding path program 1 times [2023-11-21 20:58:56,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:56,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18728281] [2023-11-21 20:58:56,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:56,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:56,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:58:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:56,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:58:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:56,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:58:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:56,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-21 20:58:56,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:56,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-21 20:58:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:56,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 20:58:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:56,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:58:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:56,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-21 20:58:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:56,832 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-21 20:58:56,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:56,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18728281] [2023-11-21 20:58:56,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18728281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:56,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:56,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 20:58:56,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264765544] [2023-11-21 20:58:56,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:56,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:58:56,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:56,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:58:56,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:58:56,835 INFO L87 Difference]: Start difference. First operand 4299 states and 6206 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 3 states have internal predecessors, (64), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-21 20:58:58,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:58,456 INFO L93 Difference]: Finished difference Result 7711 states and 11297 transitions. [2023-11-21 20:58:58,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 20:58:58,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 3 states have internal predecessors, (64), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 110 [2023-11-21 20:58:58,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:58,497 INFO L225 Difference]: With dead ends: 7711 [2023-11-21 20:58:58,497 INFO L226 Difference]: Without dead ends: 5499 [2023-11-21 20:58:58,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:58:58,505 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 173 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:58,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 635 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 20:58:58,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5499 states. [2023-11-21 20:58:59,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5499 to 5163. [2023-11-21 20:58:59,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5163 states, 4420 states have (on average 1.4705882352941178) internal successors, (6500), 4438 states have internal predecessors, (6500), 534 states have call successors, (534), 209 states have call predecessors, (534), 208 states have return successors, (532), 516 states have call predecessors, (532), 532 states have call successors, (532) [2023-11-21 20:58:59,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 7566 transitions. [2023-11-21 20:58:59,119 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 7566 transitions. Word has length 110 [2023-11-21 20:58:59,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:59,119 INFO L495 AbstractCegarLoop]: Abstraction has 5163 states and 7566 transitions. [2023-11-21 20:58:59,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 3 states have internal predecessors, (64), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-21 20:58:59,120 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 7566 transitions. [2023-11-21 20:58:59,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-21 20:58:59,140 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:59,140 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:59,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-21 20:58:59,140 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:59,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:59,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1284262554, now seen corresponding path program 1 times [2023-11-21 20:58:59,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:59,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679883143] [2023-11-21 20:58:59,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:59,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:59,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:58:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:59,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:58:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:59,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:58:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:59,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-21 20:58:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:59,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-21 20:58:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:59,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 20:58:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:59,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:58:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:59,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2023-11-21 20:58:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:59,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:58:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:59,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-11-21 20:58:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-21 20:58:59,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:59,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679883143] [2023-11-21 20:58:59,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679883143] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:59,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:59,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 20:58:59,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029525813] [2023-11-21 20:58:59,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:59,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:58:59,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:59,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:58:59,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:58:59,455 INFO L87 Difference]: Start difference. First operand 5163 states and 7566 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 20:59:01,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:59:01,723 INFO L93 Difference]: Finished difference Result 15332 states and 22711 transitions. [2023-11-21 20:59:01,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 20:59:01,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 149 [2023-11-21 20:59:01,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:59:01,800 INFO L225 Difference]: With dead ends: 15332 [2023-11-21 20:59:01,800 INFO L226 Difference]: Without dead ends: 10175 [2023-11-21 20:59:01,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-21 20:59:01,818 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 314 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 20:59:01,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 420 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 20:59:01,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10175 states. [2023-11-21 20:59:03,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10175 to 10123. [2023-11-21 20:59:03,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10123 states, 8676 states have (on average 1.4610419548178883) internal successors, (12676), 8710 states have internal predecessors, (12676), 1030 states have call successors, (1030), 417 states have call predecessors, (1030), 416 states have return successors, (1028), 996 states have call predecessors, (1028), 1028 states have call successors, (1028) [2023-11-21 20:59:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10123 states to 10123 states and 14734 transitions. [2023-11-21 20:59:03,215 INFO L78 Accepts]: Start accepts. Automaton has 10123 states and 14734 transitions. Word has length 149 [2023-11-21 20:59:03,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:59:03,216 INFO L495 AbstractCegarLoop]: Abstraction has 10123 states and 14734 transitions. [2023-11-21 20:59:03,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 20:59:03,217 INFO L276 IsEmpty]: Start isEmpty. Operand 10123 states and 14734 transitions. [2023-11-21 20:59:03,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-21 20:59:03,254 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:59:03,254 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:03,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-21 20:59:03,255 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:59:03,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:03,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1444777983, now seen corresponding path program 1 times [2023-11-21 20:59:03,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:03,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576246410] [2023-11-21 20:59:03,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:03,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:03,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:59:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:03,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:59:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:03,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:59:03,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:03,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-21 20:59:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:03,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-21 20:59:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:03,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 20:59:03,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:03,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:59:03,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:03,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-11-21 20:59:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:03,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:59:03,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:03,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-11-21 20:59:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-21 20:59:03,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:03,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576246410] [2023-11-21 20:59:03,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576246410] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:03,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:03,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 20:59:03,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088164700] [2023-11-21 20:59:03,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:03,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:59:03,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:03,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:59:03,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:59:03,589 INFO L87 Difference]: Start difference. First operand 10123 states and 14734 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 20:59:06,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:59:06,864 INFO L93 Difference]: Finished difference Result 30068 states and 44215 transitions. [2023-11-21 20:59:06,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 20:59:06,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 149 [2023-11-21 20:59:06,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:59:06,939 INFO L225 Difference]: With dead ends: 30068 [2023-11-21 20:59:06,939 INFO L226 Difference]: Without dead ends: 19951 [2023-11-21 20:59:06,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-21 20:59:06,970 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 316 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 20:59:06,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 420 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 20:59:06,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19951 states. [2023-11-21 20:59:08,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19951 to 19851. [2023-11-21 20:59:08,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19851 states, 17028 states have (on average 1.4510218463706837) internal successors, (24708), 17094 states have internal predecessors, (24708), 1990 states have call successors, (1990), 833 states have call predecessors, (1990), 832 states have return successors, (1988), 1924 states have call predecessors, (1988), 1988 states have call successors, (1988) [2023-11-21 20:59:09,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19851 states to 19851 states and 28686 transitions. [2023-11-21 20:59:09,075 INFO L78 Accepts]: Start accepts. Automaton has 19851 states and 28686 transitions. Word has length 149 [2023-11-21 20:59:09,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:59:09,075 INFO L495 AbstractCegarLoop]: Abstraction has 19851 states and 28686 transitions. [2023-11-21 20:59:09,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 20:59:09,076 INFO L276 IsEmpty]: Start isEmpty. Operand 19851 states and 28686 transitions. [2023-11-21 20:59:09,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-21 20:59:09,153 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:59:09,153 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:09,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-21 20:59:09,154 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:59:09,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:09,155 INFO L85 PathProgramCache]: Analyzing trace with hash 616496907, now seen corresponding path program 1 times [2023-11-21 20:59:09,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:09,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458519531] [2023-11-21 20:59:09,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:09,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:09,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:59:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:09,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:59:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:09,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:59:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:09,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-21 20:59:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:09,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-21 20:59:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:09,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 20:59:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:09,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:59:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:09,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-21 20:59:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:09,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:59:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:09,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-11-21 20:59:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-21 20:59:09,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:09,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458519531] [2023-11-21 20:59:09,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458519531] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:09,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:09,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 20:59:09,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870643314] [2023-11-21 20:59:09,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:09,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:59:09,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:09,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:59:09,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:59:09,490 INFO L87 Difference]: Start difference. First operand 19851 states and 28686 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 20:59:13,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:59:13,745 INFO L93 Difference]: Finished difference Result 58964 states and 86039 transitions. [2023-11-21 20:59:13,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 20:59:13,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 149 [2023-11-21 20:59:13,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:59:13,909 INFO L225 Difference]: With dead ends: 58964 [2023-11-21 20:59:13,910 INFO L226 Difference]: Without dead ends: 39119 [2023-11-21 20:59:13,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-21 20:59:13,971 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 319 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 20:59:13,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 420 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 20:59:14,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39119 states. [2023-11-21 20:59:17,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39119 to 38923. [2023-11-21 20:59:17,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38923 states, 33412 states have (on average 1.440560277744523) internal successors, (48132), 33542 states have internal predecessors, (48132), 3846 states have call successors, (3846), 1665 states have call predecessors, (3846), 1664 states have return successors, (3844), 3716 states have call predecessors, (3844), 3844 states have call successors, (3844) [2023-11-21 20:59:17,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38923 states to 38923 states and 55822 transitions. [2023-11-21 20:59:17,708 INFO L78 Accepts]: Start accepts. Automaton has 38923 states and 55822 transitions. Word has length 149 [2023-11-21 20:59:17,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:59:17,709 INFO L495 AbstractCegarLoop]: Abstraction has 38923 states and 55822 transitions. [2023-11-21 20:59:17,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 20:59:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 38923 states and 55822 transitions. [2023-11-21 20:59:17,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-21 20:59:17,860 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:59:17,860 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:17,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-21 20:59:17,860 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:59:17,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:17,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1111814785, now seen corresponding path program 1 times [2023-11-21 20:59:17,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:17,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952013228] [2023-11-21 20:59:17,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:17,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:17,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:59:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:17,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:59:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:18,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:59:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:18,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-21 20:59:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:18,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-21 20:59:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:18,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 20:59:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:18,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:59:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:18,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-11-21 20:59:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:18,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:59:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:18,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-11-21 20:59:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-21 20:59:18,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:18,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952013228] [2023-11-21 20:59:18,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952013228] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:18,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:18,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 20:59:18,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800812688] [2023-11-21 20:59:18,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:18,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:59:18,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:18,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:59:18,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:59:18,113 INFO L87 Difference]: Start difference. First operand 38923 states and 55822 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)