./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.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_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/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_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/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_85050639-ced1-4eeb-bb9a-92ea8e470e32/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 43061c6fd2cf55dd1721985927e668f0444e5f80f3517bfb8a4405f126e779da --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:18:08,963 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:18:09,091 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:18:09,101 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:18:09,101 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:18:09,145 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:18:09,145 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:18:09,146 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:18:09,147 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:18:09,148 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:18:09,149 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:18:09,149 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:18:09,150 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:18:09,151 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:18:09,151 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:18:09,152 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:18:09,153 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:18:09,153 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:18:09,154 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:18:09,155 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:18:09,155 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:18:09,156 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:18:09,157 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:18:09,157 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:18:09,158 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:18:09,159 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:18:09,159 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:18:09,160 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:18:09,160 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:18:09,161 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:18:09,161 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:18:09,162 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:18:09,163 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:18:09,163 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:18:09,164 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:18:09,164 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:18:09,165 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:18:09,165 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:18:09,166 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:18:09,166 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:18:09,167 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:18:09,168 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:18:09,168 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_85050639-ced1-4eeb-bb9a-92ea8e470e32/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43061c6fd2cf55dd1721985927e668f0444e5f80f3517bfb8a4405f126e779da [2023-11-21 22:18:09,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:18:09,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:18:09,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:18:09,521 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:18:09,522 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:18:09,523 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-2.c [2023-11-21 22:18:12,864 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:18:13,182 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:18:13,183 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-2.c [2023-11-21 22:18:13,204 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/data/879505609/b874ef24737d4d3fb444c7d10e04f164/FLAG40831faf1 [2023-11-21 22:18:13,220 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/data/879505609/b874ef24737d4d3fb444c7d10e04f164 [2023-11-21 22:18:13,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:18:13,225 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:18:13,226 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:18:13,226 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:18:13,232 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:18:13,233 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:18:13" (1/1) ... [2023-11-21 22:18:13,234 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49a3c697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:13, skipping insertion in model container [2023-11-21 22:18:13,234 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:18:13" (1/1) ... [2023-11-21 22:18:13,294 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:18:13,501 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_85050639-ced1-4eeb-bb9a-92ea8e470e32/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-2.c[913,926] [2023-11-21 22:18:13,568 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_85050639-ced1-4eeb-bb9a-92ea8e470e32/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-2.c[5977,5990] [2023-11-21 22:18:13,672 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:18:13,687 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:18:13,699 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_85050639-ced1-4eeb-bb9a-92ea8e470e32/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-2.c[913,926] [2023-11-21 22:18:13,718 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_85050639-ced1-4eeb-bb9a-92ea8e470e32/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-2.c[5977,5990] [2023-11-21 22:18:13,778 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:18:13,822 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:18:13,823 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:13 WrapperNode [2023-11-21 22:18:13,823 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:18:13,825 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:18:13,825 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:18:13,825 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:18:13,833 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:13" (1/1) ... [2023-11-21 22:18:13,864 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:13" (1/1) ... [2023-11-21 22:18:13,959 INFO L138 Inliner]: procedures = 66, calls = 76, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 911 [2023-11-21 22:18:13,960 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:18:13,960 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:18:13,961 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:18:13,961 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:18:13,973 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:13" (1/1) ... [2023-11-21 22:18:13,973 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:13" (1/1) ... [2023-11-21 22:18:13,978 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:13" (1/1) ... [2023-11-21 22:18:13,996 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 22:18:13,996 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:13" (1/1) ... [2023-11-21 22:18:13,997 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:13" (1/1) ... [2023-11-21 22:18:14,015 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:13" (1/1) ... [2023-11-21 22:18:14,030 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:13" (1/1) ... [2023-11-21 22:18:14,066 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:13" (1/1) ... [2023-11-21 22:18:14,070 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:13" (1/1) ... [2023-11-21 22:18:14,087 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:18:14,093 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:18:14,094 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:18:14,094 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:18:14,095 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:13" (1/1) ... [2023-11-21 22:18:14,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:18:14,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:14,153 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:18:14,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:18:14,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:18:14,207 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-21 22:18:14,208 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-21 22:18:14,208 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2023-11-21 22:18:14,210 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2023-11-21 22:18:14,211 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-21 22:18:14,212 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-21 22:18:14,212 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-21 22:18:14,212 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-21 22:18:14,213 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-21 22:18:14,213 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-21 22:18:14,213 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-21 22:18:14,213 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-21 22:18:14,214 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-21 22:18:14,214 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-21 22:18:14,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:18:14,215 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-21 22:18:14,215 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-21 22:18:14,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:18:14,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:18:14,216 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-21 22:18:14,216 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-21 22:18:14,216 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-11-21 22:18:14,218 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-11-21 22:18:14,389 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:18:14,392 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:18:15,560 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:18:16,216 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:18:16,217 INFO L308 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-21 22:18:16,219 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:18:16 BoogieIcfgContainer [2023-11-21 22:18:16,219 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:18:16,222 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:18:16,223 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:18:16,226 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:18:16,226 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:18:13" (1/3) ... [2023-11-21 22:18:16,227 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@310f935f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:18:16, skipping insertion in model container [2023-11-21 22:18:16,227 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:18:13" (2/3) ... [2023-11-21 22:18:16,229 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@310f935f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:18:16, skipping insertion in model container [2023-11-21 22:18:16,229 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:18:16" (3/3) ... [2023-11-21 22:18:16,232 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.09.cil-2.c [2023-11-21 22:18:16,256 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:18:16,256 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-21 22:18:16,315 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:18:16,322 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;@f626ccf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:18:16,322 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-21 22:18:16,331 INFO L276 IsEmpty]: Start isEmpty. Operand has 222 states, 178 states have (on average 1.5337078651685394) internal successors, (273), 185 states have internal predecessors, (273), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-21 22:18:16,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-21 22:18:16,344 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:16,345 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 22:18:16,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:16,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:16,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1823323180, now seen corresponding path program 1 times [2023-11-21 22:18:16,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:16,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116014795] [2023-11-21 22:18:16,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:16,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:16,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-21 22:18:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:16,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-21 22:18:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:16,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:16,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116014795] [2023-11-21 22:18:16,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116014795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:16,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:16,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:18:16,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192555513] [2023-11-21 22:18:16,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:16,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:18:16,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:16,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:18:16,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:18:16,894 INFO L87 Difference]: Start difference. First operand has 222 states, 178 states have (on average 1.5337078651685394) internal successors, (273), 185 states have internal predecessors, (273), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) 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 22:18:17,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:17,355 INFO L93 Difference]: Finished difference Result 476 states and 718 transitions. [2023-11-21 22:18:17,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:18:17,364 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 22:18:17,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:17,377 INFO L225 Difference]: With dead ends: 476 [2023-11-21 22:18:17,377 INFO L226 Difference]: Without dead ends: 254 [2023-11-21 22:18:17,389 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 22:18:17,394 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 357 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:17,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 399 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:18:17,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-11-21 22:18:17,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 250. [2023-11-21 22:18:17,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 204 states have (on average 1.4705882352941178) internal successors, (300), 208 states have internal predecessors, (300), 34 states have call successors, (34), 12 states have call predecessors, (34), 10 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-21 22:18:17,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 364 transitions. [2023-11-21 22:18:17,481 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 364 transitions. Word has length 28 [2023-11-21 22:18:17,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:17,483 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 364 transitions. [2023-11-21 22:18:17,484 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 22:18:17,485 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 364 transitions. [2023-11-21 22:18:17,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-21 22:18:17,489 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:17,490 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 22:18:17,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:18:17,491 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:17,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:17,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1755899894, now seen corresponding path program 1 times [2023-11-21 22:18:17,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:17,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718075858] [2023-11-21 22:18:17,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:17,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:17,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-21 22:18:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:17,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:18:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:17,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:17,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718075858] [2023-11-21 22:18:17,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718075858] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:17,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:17,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:18:17,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463547707] [2023-11-21 22:18:17,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:17,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:18:17,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:17,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:18:17,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:18:17,601 INFO L87 Difference]: Start difference. First operand 250 states and 364 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 22:18:17,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:17,938 INFO L93 Difference]: Finished difference Result 406 states and 581 transitions. [2023-11-21 22:18:17,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:18:17,938 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 22:18:17,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:17,942 INFO L225 Difference]: With dead ends: 406 [2023-11-21 22:18:17,943 INFO L226 Difference]: Without dead ends: 325 [2023-11-21 22:18:17,944 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 22:18:17,945 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 356 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:17,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 404 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:18:17,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-11-21 22:18:17,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 321. [2023-11-21 22:18:17,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 264 states have (on average 1.4431818181818181) internal successors, (381), 268 states have internal predecessors, (381), 41 states have call successors, (41), 16 states have call predecessors, (41), 14 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-11-21 22:18:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 459 transitions. [2023-11-21 22:18:17,986 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 459 transitions. Word has length 29 [2023-11-21 22:18:17,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:17,986 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 459 transitions. [2023-11-21 22:18:17,987 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 22:18:17,987 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 459 transitions. [2023-11-21 22:18:17,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-21 22:18:17,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:17,990 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 22:18:17,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:18:17,990 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:17,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:17,991 INFO L85 PathProgramCache]: Analyzing trace with hash -696593272, now seen corresponding path program 1 times [2023-11-21 22:18:17,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:17,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010638] [2023-11-21 22:18:17,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:17,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:18,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-21 22:18:18,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:18,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-21 22:18:18,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:18,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:18,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010638] [2023-11-21 22:18:18,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:18,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:18,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:18:18,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713206669] [2023-11-21 22:18:18,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:18,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:18:18,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:18,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:18:18,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:18:18,105 INFO L87 Difference]: Start difference. First operand 321 states and 459 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 22:18:18,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:18,614 INFO L93 Difference]: Finished difference Result 561 states and 787 transitions. [2023-11-21 22:18:18,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:18:18,615 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 22:18:18,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:18,620 INFO L225 Difference]: With dead ends: 561 [2023-11-21 22:18:18,620 INFO L226 Difference]: Without dead ends: 409 [2023-11-21 22:18:18,621 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 22:18:18,623 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 122 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:18,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 545 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:18:18,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2023-11-21 22:18:18,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 395. [2023-11-21 22:18:18,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 327 states have (on average 1.4250764525993884) internal successors, (466), 333 states have internal predecessors, (466), 47 states have call successors, (47), 21 states have call predecessors, (47), 19 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2023-11-21 22:18:18,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 556 transitions. [2023-11-21 22:18:18,699 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 556 transitions. Word has length 30 [2023-11-21 22:18:18,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:18,699 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 556 transitions. [2023-11-21 22:18:18,700 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 22:18:18,700 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 556 transitions. [2023-11-21 22:18:18,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-21 22:18:18,713 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:18,714 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 22:18:18,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:18:18,714 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:18,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:18,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1028760407, now seen corresponding path program 1 times [2023-11-21 22:18:18,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:18,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850477595] [2023-11-21 22:18:18,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:18,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:18,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-21 22:18:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:18,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-21 22:18:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:18,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-21 22:18:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:18,905 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 22:18:18,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:18,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850477595] [2023-11-21 22:18:18,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850477595] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:18,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:18,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:18:18,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847394473] [2023-11-21 22:18:18,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:18,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:18:18,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:18,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:18:18,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:18:18,909 INFO L87 Difference]: Start difference. First operand 395 states and 556 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 22:18:19,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:19,436 INFO L93 Difference]: Finished difference Result 558 states and 774 transitions. [2023-11-21 22:18:19,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:18:19,437 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 22:18:19,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:19,442 INFO L225 Difference]: With dead ends: 558 [2023-11-21 22:18:19,442 INFO L226 Difference]: Without dead ends: 400 [2023-11-21 22:18:19,452 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 22:18:19,459 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 107 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:19,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 589 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:18:19,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2023-11-21 22:18:19,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 389. [2023-11-21 22:18:19,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 321 states have (on average 1.4080996884735202) internal successors, (452), 327 states have internal predecessors, (452), 47 states have call successors, (47), 21 states have call predecessors, (47), 19 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2023-11-21 22:18:19,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 542 transitions. [2023-11-21 22:18:19,506 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 542 transitions. Word has length 43 [2023-11-21 22:18:19,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:19,507 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 542 transitions. [2023-11-21 22:18:19,507 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 22:18:19,507 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 542 transitions. [2023-11-21 22:18:19,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-21 22:18:19,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:19,510 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 22:18:19,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:18:19,511 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:19,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:19,513 INFO L85 PathProgramCache]: Analyzing trace with hash -290784789, now seen corresponding path program 1 times [2023-11-21 22:18:19,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:19,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518636964] [2023-11-21 22:18:19,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:19,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:19,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-21 22:18:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:19,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:18:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:19,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:18:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:19,654 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 22:18:19,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:19,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518636964] [2023-11-21 22:18:19,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518636964] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:19,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:19,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:18:19,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572157026] [2023-11-21 22:18:19,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:19,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:18:19,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:19,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:18:19,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:18:19,658 INFO L87 Difference]: Start difference. First operand 389 states and 542 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 22:18:20,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:20,122 INFO L93 Difference]: Finished difference Result 638 states and 866 transitions. [2023-11-21 22:18:20,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:18:20,124 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 22:18:20,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:20,133 INFO L225 Difference]: With dead ends: 638 [2023-11-21 22:18:20,134 INFO L226 Difference]: Without dead ends: 435 [2023-11-21 22:18:20,135 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 22:18:20,141 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 338 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:20,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 404 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:18:20,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2023-11-21 22:18:20,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 435. [2023-11-21 22:18:20,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 360 states have (on average 1.375) internal successors, (495), 366 states have internal predecessors, (495), 51 states have call successors, (51), 24 states have call predecessors, (51), 22 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-21 22:18:20,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 593 transitions. [2023-11-21 22:18:20,189 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 593 transitions. Word has length 46 [2023-11-21 22:18:20,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:20,189 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 593 transitions. [2023-11-21 22:18:20,190 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 22:18:20,190 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 593 transitions. [2023-11-21 22:18:20,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-21 22:18:20,192 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:20,192 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-21 22:18:20,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:18:20,192 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:20,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:20,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1615350144, now seen corresponding path program 1 times [2023-11-21 22:18:20,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:20,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097275215] [2023-11-21 22:18:20,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:20,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:20,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-21 22:18:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:20,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-21 22:18:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:20,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-21 22:18:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:18:20,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:20,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097275215] [2023-11-21 22:18:20,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097275215] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:20,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:20,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:18:20,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078887009] [2023-11-21 22:18:20,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:20,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:18:20,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:20,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:18:20,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:18:20,343 INFO L87 Difference]: Start difference. First operand 435 states and 593 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 22:18:20,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:20,915 INFO L93 Difference]: Finished difference Result 662 states and 893 transitions. [2023-11-21 22:18:20,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:18:20,916 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2023-11-21 22:18:20,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:20,924 INFO L225 Difference]: With dead ends: 662 [2023-11-21 22:18:20,924 INFO L226 Difference]: Without dead ends: 433 [2023-11-21 22:18:20,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:18:20,927 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 389 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:20,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 582 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:18:20,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-11-21 22:18:20,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 431. [2023-11-21 22:18:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 356 states have (on average 1.345505617977528) internal successors, (479), 362 states have internal predecessors, (479), 51 states have call successors, (51), 24 states have call predecessors, (51), 22 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-21 22:18:20,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 577 transitions. [2023-11-21 22:18:20,982 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 577 transitions. Word has length 47 [2023-11-21 22:18:20,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:20,982 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 577 transitions. [2023-11-21 22:18:20,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 22:18:20,983 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 577 transitions. [2023-11-21 22:18:20,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-21 22:18:20,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:20,985 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 22:18:20,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 22:18:20,986 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:20,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:20,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1806778497, now seen corresponding path program 1 times [2023-11-21 22:18:20,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:20,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162547036] [2023-11-21 22:18:20,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:20,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:21,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-21 22:18:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:21,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-21 22:18:21,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:21,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-21 22:18:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:21,098 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 22:18:21,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:21,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162547036] [2023-11-21 22:18:21,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162547036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:21,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:21,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:18:21,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745148743] [2023-11-21 22:18:21,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:21,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:18:21,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:21,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:18:21,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:18:21,103 INFO L87 Difference]: Start difference. First operand 431 states and 577 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 22:18:21,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:21,602 INFO L93 Difference]: Finished difference Result 467 states and 618 transitions. [2023-11-21 22:18:21,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:18:21,603 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 22:18:21,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:21,609 INFO L225 Difference]: With dead ends: 467 [2023-11-21 22:18:21,610 INFO L226 Difference]: Without dead ends: 464 [2023-11-21 22:18:21,611 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 22:18:21,612 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 593 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:21,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 405 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:18:21,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2023-11-21 22:18:21,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 430. [2023-11-21 22:18:21,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 356 states have (on average 1.3398876404494382) internal successors, (477), 361 states have internal predecessors, (477), 50 states have call successors, (50), 24 states have call predecessors, (50), 22 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-21 22:18:21,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 574 transitions. [2023-11-21 22:18:21,666 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 574 transitions. Word has length 47 [2023-11-21 22:18:21,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:21,670 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 574 transitions. [2023-11-21 22:18:21,670 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 22:18:21,670 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 574 transitions. [2023-11-21 22:18:21,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-21 22:18:21,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:21,672 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 22:18:21,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 22:18:21,672 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:21,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:21,673 INFO L85 PathProgramCache]: Analyzing trace with hash -176768946, now seen corresponding path program 1 times [2023-11-21 22:18:21,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:21,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271076708] [2023-11-21 22:18:21,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:21,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:21,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:21,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-21 22:18:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:21,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-21 22:18:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:21,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-21 22:18:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:21,904 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 22:18:21,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:21,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271076708] [2023-11-21 22:18:21,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271076708] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:21,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458486841] [2023-11-21 22:18:21,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:21,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:21,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:21,911 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:21,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:18:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:22,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 22:18:22,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:22,343 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 22:18:22,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:22,454 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 22:18:22,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458486841] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:18:22,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:18:22,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2023-11-21 22:18:22,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113967547] [2023-11-21 22:18:22,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:22,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 22:18:22,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:22,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 22:18:22,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:18:22,459 INFO L87 Difference]: Start difference. First operand 430 states and 574 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 22:18:23,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:23,339 INFO L93 Difference]: Finished difference Result 831 states and 1072 transitions. [2023-11-21 22:18:23,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 22:18:23,340 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 22:18:23,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:23,347 INFO L225 Difference]: With dead ends: 831 [2023-11-21 22:18:23,347 INFO L226 Difference]: Without dead ends: 828 [2023-11-21 22:18:23,348 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 22:18:23,350 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 470 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:23,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 950 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 22:18:23,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2023-11-21 22:18:23,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 629. [2023-11-21 22:18:23,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 523 states have (on average 1.315487571701721) internal successors, (688), 530 states have internal predecessors, (688), 69 states have call successors, (69), 37 states have call predecessors, (69), 35 states have return successors, (66), 62 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-21 22:18:23,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 823 transitions. [2023-11-21 22:18:23,459 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 823 transitions. Word has length 48 [2023-11-21 22:18:23,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:23,460 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 823 transitions. [2023-11-21 22:18:23,460 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 22:18:23,460 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 823 transitions. [2023-11-21 22:18:23,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-21 22:18:23,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:23,463 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:23,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-21 22:18:23,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:23,685 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:23,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:23,685 INFO L85 PathProgramCache]: Analyzing trace with hash 208400864, now seen corresponding path program 1 times [2023-11-21 22:18:23,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:23,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019222395] [2023-11-21 22:18:23,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:23,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:23,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:18:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:23,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:18:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:23,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:18:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:24,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:18:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:24,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 22:18:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:24,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:24,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:24,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019222395] [2023-11-21 22:18:24,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019222395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:24,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:24,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:18:24,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564324043] [2023-11-21 22:18:24,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:24,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:18:24,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:24,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:18:24,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:18:24,055 INFO L87 Difference]: Start difference. First operand 629 states and 823 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:18:26,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:26,281 INFO L93 Difference]: Finished difference Result 943 states and 1303 transitions. [2023-11-21 22:18:26,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 22:18:26,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 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 59 [2023-11-21 22:18:26,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:26,289 INFO L225 Difference]: With dead ends: 943 [2023-11-21 22:18:26,289 INFO L226 Difference]: Without dead ends: 780 [2023-11-21 22:18:26,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:18:26,294 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 626 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:26,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 955 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-21 22:18:26,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2023-11-21 22:18:26,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 779. [2023-11-21 22:18:26,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 648 states have (on average 1.3425925925925926) internal successors, (870), 656 states have internal predecessors, (870), 88 states have call successors, (88), 43 states have call predecessors, (88), 41 states have return successors, (85), 80 states have call predecessors, (85), 85 states have call successors, (85) [2023-11-21 22:18:26,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1043 transitions. [2023-11-21 22:18:26,442 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1043 transitions. Word has length 59 [2023-11-21 22:18:26,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:26,443 INFO L495 AbstractCegarLoop]: Abstraction has 779 states and 1043 transitions. [2023-11-21 22:18:26,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:18:26,443 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1043 transitions. [2023-11-21 22:18:26,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-21 22:18:26,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:26,446 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 22:18:26,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 22:18:26,447 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:26,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:26,448 INFO L85 PathProgramCache]: Analyzing trace with hash -630853475, now seen corresponding path program 2 times [2023-11-21 22:18:26,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:26,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786916179] [2023-11-21 22:18:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:26,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:26,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-21 22:18:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:26,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-21 22:18:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:26,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-21 22:18:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:26,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 22:18:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:26,560 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 22:18:26,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:26,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786916179] [2023-11-21 22:18:26,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786916179] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:26,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:26,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:18:26,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515032864] [2023-11-21 22:18:26,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:26,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:18:26,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:26,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:18:26,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:18:26,564 INFO L87 Difference]: Start difference. First operand 779 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 22:18:27,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:27,021 INFO L93 Difference]: Finished difference Result 1085 states and 1428 transitions. [2023-11-21 22:18:27,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:18:27,022 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 22:18:27,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:27,029 INFO L225 Difference]: With dead ends: 1085 [2023-11-21 22:18:27,029 INFO L226 Difference]: Without dead ends: 723 [2023-11-21 22:18:27,030 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 22:18:27,031 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 346 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:27,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 426 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:18:27,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2023-11-21 22:18:27,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 720. [2023-11-21 22:18:27,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 599 states have (on average 1.335559265442404) internal successors, (800), 608 states have internal predecessors, (800), 82 states have call successors, (82), 39 states have call predecessors, (82), 37 states have return successors, (79), 73 states have call predecessors, (79), 79 states have call successors, (79) [2023-11-21 22:18:27,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 961 transitions. [2023-11-21 22:18:27,164 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 961 transitions. Word has length 61 [2023-11-21 22:18:27,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:27,164 INFO L495 AbstractCegarLoop]: Abstraction has 720 states and 961 transitions. [2023-11-21 22:18:27,164 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 22:18:27,165 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 961 transitions. [2023-11-21 22:18:27,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-21 22:18:27,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:27,169 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 22:18:27,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 22:18:27,169 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:27,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:27,170 INFO L85 PathProgramCache]: Analyzing trace with hash -900599463, now seen corresponding path program 1 times [2023-11-21 22:18:27,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:27,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103384013] [2023-11-21 22:18:27,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:27,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:27,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-21 22:18:27,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:27,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-21 22:18:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:27,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-21 22:18:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:27,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-21 22:18:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:27,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-21 22:18:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:27,425 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 22:18:27,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:27,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103384013] [2023-11-21 22:18:27,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103384013] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:27,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842923194] [2023-11-21 22:18:27,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:27,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:27,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:27,428 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:27,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:18:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:27,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:18:27,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:27,608 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 22:18:27,608 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:18:27,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842923194] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:27,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:18:27,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-21 22:18:27,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974708879] [2023-11-21 22:18:27,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:27,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:18:27,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:27,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:18:27,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:18:27,611 INFO L87 Difference]: Start difference. First operand 720 states and 961 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 22:18:27,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:27,848 INFO L93 Difference]: Finished difference Result 814 states and 1075 transitions. [2023-11-21 22:18:27,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:18:27,849 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 22:18:27,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:27,852 INFO L225 Difference]: With dead ends: 814 [2023-11-21 22:18:27,852 INFO L226 Difference]: Without dead ends: 319 [2023-11-21 22:18:27,854 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 22:18:27,855 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 24 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:27,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 535 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:18:27,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-11-21 22:18:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2023-11-21 22:18:27,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 262 states have (on average 1.4694656488549618) internal successors, (385), 265 states have internal predecessors, (385), 44 states have call successors, (44), 13 states have call predecessors, (44), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-21 22:18:27,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 471 transitions. [2023-11-21 22:18:27,924 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 471 transitions. Word has length 73 [2023-11-21 22:18:27,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:27,924 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 471 transitions. [2023-11-21 22:18:27,924 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 22:18:27,925 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 471 transitions. [2023-11-21 22:18:27,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-21 22:18:27,927 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:27,928 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:27,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:28,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:28,149 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:28,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:28,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1879644576, now seen corresponding path program 1 times [2023-11-21 22:18:28,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:28,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429176313] [2023-11-21 22:18:28,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:28,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:28,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:18:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:28,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:18:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:28,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:18:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:28,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:18:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:28,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 22:18:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:28,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-21 22:18:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:28,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:18:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:28,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-21 22:18:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 22:18:28,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:28,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429176313] [2023-11-21 22:18:28,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429176313] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:28,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199584372] [2023-11-21 22:18:28,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:28,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:28,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:28,639 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:28,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:18:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:28,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:18:28,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:28,990 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 22:18:28,990 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:18:28,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199584372] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:28,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:18:28,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 22:18:28,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813517718] [2023-11-21 22:18:28,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:28,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:18:28,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:28,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:18:28,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:18:28,993 INFO L87 Difference]: Start difference. First operand 319 states and 471 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:18:29,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:29,189 INFO L93 Difference]: Finished difference Result 938 states and 1408 transitions. [2023-11-21 22:18:29,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:18:29,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 117 [2023-11-21 22:18:29,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:29,195 INFO L225 Difference]: With dead ends: 938 [2023-11-21 22:18:29,195 INFO L226 Difference]: Without dead ends: 625 [2023-11-21 22:18:29,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 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 22:18:29,199 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 205 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:29,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 460 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:18:29,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2023-11-21 22:18:29,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 619. [2023-11-21 22:18:29,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 514 states have (on average 1.4669260700389104) internal successors, (754), 518 states have internal predecessors, (754), 80 states have call successors, (80), 25 states have call predecessors, (80), 24 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-21 22:18:29,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 912 transitions. [2023-11-21 22:18:29,306 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 912 transitions. Word has length 117 [2023-11-21 22:18:29,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:29,306 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 912 transitions. [2023-11-21 22:18:29,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:18:29,307 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 912 transitions. [2023-11-21 22:18:29,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-21 22:18:29,309 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:29,310 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:29,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:29,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:29,531 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:29,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:29,532 INFO L85 PathProgramCache]: Analyzing trace with hash -293175454, now seen corresponding path program 1 times [2023-11-21 22:18:29,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:29,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476723790] [2023-11-21 22:18:29,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:29,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:29,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:18:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:29,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:18:29,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:29,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:18:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:29,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:18:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:29,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 22:18:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:29,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-21 22:18:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:29,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:18:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:29,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-21 22:18:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 22:18:29,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:29,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476723790] [2023-11-21 22:18:29,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476723790] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:29,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791928928] [2023-11-21 22:18:29,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:29,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:29,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:29,935 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:29,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:18:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:30,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:18:30,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-21 22:18:30,240 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:18:30,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791928928] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:30,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:18:30,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 22:18:30,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943514306] [2023-11-21 22:18:30,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:30,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:18:30,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:30,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:18:30,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:18:30,246 INFO L87 Difference]: Start difference. First operand 619 states and 912 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:18:30,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:30,534 INFO L93 Difference]: Finished difference Result 1832 states and 2743 transitions. [2023-11-21 22:18:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:18:30,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 117 [2023-11-21 22:18:30,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:30,543 INFO L225 Difference]: With dead ends: 1832 [2023-11-21 22:18:30,543 INFO L226 Difference]: Without dead ends: 1219 [2023-11-21 22:18:30,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 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 22:18:30,546 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 217 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:30,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 440 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:18:30,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2023-11-21 22:18:30,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1211. [2023-11-21 22:18:30,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1012 states have (on average 1.4624505928853755) internal successors, (1480), 1018 states have internal predecessors, (1480), 150 states have call successors, (150), 49 states have call predecessors, (150), 48 states have return successors, (148), 144 states have call predecessors, (148), 148 states have call successors, (148) [2023-11-21 22:18:30,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1778 transitions. [2023-11-21 22:18:30,693 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1778 transitions. Word has length 117 [2023-11-21 22:18:30,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:30,693 INFO L495 AbstractCegarLoop]: Abstraction has 1211 states and 1778 transitions. [2023-11-21 22:18:30,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:18:30,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1778 transitions. [2023-11-21 22:18:30,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-21 22:18:30,697 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:30,698 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:30,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:30,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-21 22:18:30,912 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:30,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:30,913 INFO L85 PathProgramCache]: Analyzing trace with hash 444507492, now seen corresponding path program 1 times [2023-11-21 22:18:30,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:30,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025002322] [2023-11-21 22:18:30,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:30,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:31,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:18:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:31,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:18:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:31,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:18:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:31,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:18:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:31,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 22:18:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:31,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-21 22:18:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:31,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:18:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:31,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-21 22:18:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 22:18:31,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:31,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025002322] [2023-11-21 22:18:31,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025002322] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:31,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588977663] [2023-11-21 22:18:31,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:31,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:31,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:31,322 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:31,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:18:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:31,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:18:31,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-21 22:18:31,607 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:18:31,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588977663] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:31,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:18:31,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 22:18:31,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111201803] [2023-11-21 22:18:31,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:31,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:18:31,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:31,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:18:31,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:18:31,611 INFO L87 Difference]: Start difference. First operand 1211 states and 1778 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:18:32,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:32,021 INFO L93 Difference]: Finished difference Result 3596 states and 5363 transitions. [2023-11-21 22:18:32,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:18:32,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 117 [2023-11-21 22:18:32,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:32,037 INFO L225 Difference]: With dead ends: 3596 [2023-11-21 22:18:32,037 INFO L226 Difference]: Without dead ends: 2391 [2023-11-21 22:18:32,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 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 22:18:32,043 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 226 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:32,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 438 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:18:32,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2023-11-21 22:18:32,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 2379. [2023-11-21 22:18:32,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 1996 states have (on average 1.4569138276553106) internal successors, (2908), 2006 states have internal predecessors, (2908), 286 states have call successors, (286), 97 states have call predecessors, (286), 96 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2023-11-21 22:18:32,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 3478 transitions. [2023-11-21 22:18:32,435 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 3478 transitions. Word has length 117 [2023-11-21 22:18:32,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:32,436 INFO L495 AbstractCegarLoop]: Abstraction has 2379 states and 3478 transitions. [2023-11-21 22:18:32,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:18:32,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 3478 transitions. [2023-11-21 22:18:32,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-21 22:18:32,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:32,442 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:32,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:32,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:32,660 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:32,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:32,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1260117598, now seen corresponding path program 1 times [2023-11-21 22:18:32,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:32,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431608036] [2023-11-21 22:18:32,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:32,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:32,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:18:32,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:32,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:18:32,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:32,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:18:32,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:33,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:18:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:33,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 22:18:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:33,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-21 22:18:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:33,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:18:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:33,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-21 22:18:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 22:18:33,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:33,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431608036] [2023-11-21 22:18:33,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431608036] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:33,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539038769] [2023-11-21 22:18:33,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:33,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:33,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:33,062 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:33,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:18:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:33,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:18:33,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-21 22:18:33,356 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:18:33,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539038769] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:33,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:18:33,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 22:18:33,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547733008] [2023-11-21 22:18:33,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:33,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:18:33,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:33,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:18:33,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:18:33,359 INFO L87 Difference]: Start difference. First operand 2379 states and 3478 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:18:33,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:33,983 INFO L93 Difference]: Finished difference Result 7076 states and 10503 transitions. [2023-11-21 22:18:33,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:18:33,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 117 [2023-11-21 22:18:33,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:34,014 INFO L225 Difference]: With dead ends: 7076 [2023-11-21 22:18:34,015 INFO L226 Difference]: Without dead ends: 4703 [2023-11-21 22:18:34,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 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 22:18:34,025 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 220 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:34,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 423 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:18:34,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4703 states. [2023-11-21 22:18:34,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4703 to 4683. [2023-11-21 22:18:34,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4683 states, 3940 states have (on average 1.450761421319797) internal successors, (5716), 3958 states have internal predecessors, (5716), 550 states have call successors, (550), 193 states have call predecessors, (550), 192 states have return successors, (548), 532 states have call predecessors, (548), 548 states have call successors, (548) [2023-11-21 22:18:34,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4683 states to 4683 states and 6814 transitions. [2023-11-21 22:18:34,641 INFO L78 Accepts]: Start accepts. Automaton has 4683 states and 6814 transitions. Word has length 117 [2023-11-21 22:18:34,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:34,641 INFO L495 AbstractCegarLoop]: Abstraction has 4683 states and 6814 transitions. [2023-11-21 22:18:34,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:18:34,642 INFO L276 IsEmpty]: Start isEmpty. Operand 4683 states and 6814 transitions. [2023-11-21 22:18:34,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-21 22:18:34,651 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:34,651 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:34,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:34,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:34,868 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:34,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:34,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1999840352, now seen corresponding path program 1 times [2023-11-21 22:18:34,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:34,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271746700] [2023-11-21 22:18:34,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:34,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:35,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:18:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:35,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:18:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:35,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:18:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:35,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:18:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:35,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 22:18:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:35,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-21 22:18:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:35,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:18:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:35,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-21 22:18:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 22:18:35,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:35,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271746700] [2023-11-21 22:18:35,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271746700] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:35,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178343916] [2023-11-21 22:18:35,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:35,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:35,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:35,296 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:35,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 22:18:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:35,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:18:35,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-21 22:18:35,597 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:18:35,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178343916] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:35,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:18:35,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 22:18:35,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515865434] [2023-11-21 22:18:35,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:35,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:18:35,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:35,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:18:35,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:18:35,600 INFO L87 Difference]: Start difference. First operand 4683 states and 6814 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:18:36,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:36,875 INFO L93 Difference]: Finished difference Result 13940 states and 20583 transitions. [2023-11-21 22:18:36,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:18:36,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 117 [2023-11-21 22:18:36,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:36,945 INFO L225 Difference]: With dead ends: 13940 [2023-11-21 22:18:36,945 INFO L226 Difference]: Without dead ends: 9263 [2023-11-21 22:18:36,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 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 22:18:36,961 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 211 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:36,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 405 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:18:36,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9263 states. [2023-11-21 22:18:38,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9263 to 9227. [2023-11-21 22:18:38,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9227 states, 7780 states have (on average 1.444215938303342) internal successors, (11236), 7814 states have internal predecessors, (11236), 1062 states have call successors, (1062), 385 states have call predecessors, (1062), 384 states have return successors, (1060), 1028 states have call predecessors, (1060), 1060 states have call successors, (1060) [2023-11-21 22:18:38,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9227 states to 9227 states and 13358 transitions. [2023-11-21 22:18:38,202 INFO L78 Accepts]: Start accepts. Automaton has 9227 states and 13358 transitions. Word has length 117 [2023-11-21 22:18:38,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:38,202 INFO L495 AbstractCegarLoop]: Abstraction has 9227 states and 13358 transitions. [2023-11-21 22:18:38,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:18:38,203 INFO L276 IsEmpty]: Start isEmpty. Operand 9227 states and 13358 transitions. [2023-11-21 22:18:38,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-21 22:18:38,226 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:38,226 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:38,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:38,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85050639-ced1-4eeb-bb9a-92ea8e470e32/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:38,448 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:38,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:38,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1907913698, now seen corresponding path program 1 times [2023-11-21 22:18:38,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:38,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083074262] [2023-11-21 22:18:38,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:38,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:38,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:18:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:38,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:18:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:38,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:18:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:38,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:18:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:38,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 22:18:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:38,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-21 22:18:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:38,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:18:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:38,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-21 22:18:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:38,773 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-21 22:18:38,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:38,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083074262] [2023-11-21 22:18:38,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083074262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:38,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:38,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:18:38,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365041630] [2023-11-21 22:18:38,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:38,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:18:38,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:38,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:18:38,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:18:38,778 INFO L87 Difference]: Start difference. First operand 9227 states and 13358 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 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 22:18:41,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:41,408 INFO L93 Difference]: Finished difference Result 16559 states and 24337 transitions. [2023-11-21 22:18:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:18:41,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 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 117 [2023-11-21 22:18:41,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:41,488 INFO L225 Difference]: With dead ends: 16559 [2023-11-21 22:18:41,489 INFO L226 Difference]: Without dead ends: 11819 [2023-11-21 22:18:41,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:18:41,505 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 189 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:41,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 693 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-21 22:18:41,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11819 states. [2023-11-21 22:18:42,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11819 to 11131. [2023-11-21 22:18:42,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11131 states, 9620 states have (on average 1.474012474012474) internal successors, (14180), 9654 states have internal predecessors, (14180), 1094 states have call successors, (1094), 417 states have call predecessors, (1094), 416 states have return successors, (1092), 1060 states have call predecessors, (1092), 1092 states have call successors, (1092) [2023-11-21 22:18:42,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11131 states to 11131 states and 16366 transitions. [2023-11-21 22:18:42,834 INFO L78 Accepts]: Start accepts. Automaton has 11131 states and 16366 transitions. Word has length 117 [2023-11-21 22:18:42,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:42,835 INFO L495 AbstractCegarLoop]: Abstraction has 11131 states and 16366 transitions. [2023-11-21 22:18:42,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 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 22:18:42,836 INFO L276 IsEmpty]: Start isEmpty. Operand 11131 states and 16366 transitions. [2023-11-21 22:18:42,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-11-21 22:18:42,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:42,870 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2023-11-21 22:18:42,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-21 22:18:42,870 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:42,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:42,871 INFO L85 PathProgramCache]: Analyzing trace with hash 484771706, now seen corresponding path program 1 times [2023-11-21 22:18:42,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:42,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10773250] [2023-11-21 22:18:42,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:42,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:42,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:18:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:43,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:18:43,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:43,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:18:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:43,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:18:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:43,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 22:18:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:43,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-21 22:18:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:43,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:18:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:43,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-11-21 22:18:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:43,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:18:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:43,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2023-11-21 22:18:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-21 22:18:43,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:43,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10773250] [2023-11-21 22:18:43,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10773250] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:43,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:43,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:18:43,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259939133] [2023-11-21 22:18:43,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:43,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:18:43,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:43,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:18:43,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:18:43,200 INFO L87 Difference]: Start difference. First operand 11131 states and 16366 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 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 22:18:46,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:46,481 INFO L93 Difference]: Finished difference Result 33092 states and 49175 transitions. [2023-11-21 22:18:46,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:18:46,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 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 159 [2023-11-21 22:18:46,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:46,576 INFO L225 Difference]: With dead ends: 33092 [2023-11-21 22:18:46,576 INFO L226 Difference]: Without dead ends: 21967 [2023-11-21 22:18:46,611 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 22:18:46,612 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 344 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:46,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 455 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 22:18:46,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21967 states. [2023-11-21 22:18:48,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21967 to 21867. [2023-11-21 22:18:48,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21867 states, 18916 states have (on average 1.4652146331148235) internal successors, (27716), 18982 states have internal predecessors, (27716), 2118 states have call successors, (2118), 833 states have call predecessors, (2118), 832 states have return successors, (2116), 2052 states have call predecessors, (2116), 2116 states have call successors, (2116) [2023-11-21 22:18:48,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21867 states to 21867 states and 31950 transitions. [2023-11-21 22:18:48,890 INFO L78 Accepts]: Start accepts. Automaton has 21867 states and 31950 transitions. Word has length 159 [2023-11-21 22:18:48,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:48,891 INFO L495 AbstractCegarLoop]: Abstraction has 21867 states and 31950 transitions. [2023-11-21 22:18:48,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 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 22:18:48,891 INFO L276 IsEmpty]: Start isEmpty. Operand 21867 states and 31950 transitions. [2023-11-21 22:18:48,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-11-21 22:18:48,959 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:48,960 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2023-11-21 22:18:48,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-21 22:18:48,960 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:48,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:48,961 INFO L85 PathProgramCache]: Analyzing trace with hash -873980497, now seen corresponding path program 1 times [2023-11-21 22:18:48,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:48,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569379537] [2023-11-21 22:18:48,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:48,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:49,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:18:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:49,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:18:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:49,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:18:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:49,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-21 22:18:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:49,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-21 22:18:49,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:49,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-21 22:18:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:49,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:18:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:49,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2023-11-21 22:18:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:49,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:18:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:49,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2023-11-21 22:18:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-21 22:18:49,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:49,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569379537] [2023-11-21 22:18:49,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569379537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:49,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:49,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:18:49,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161245482] [2023-11-21 22:18:49,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:49,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:18:49,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:49,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:18:49,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:18:49,248 INFO L87 Difference]: Start difference. First operand 21867 states and 31950 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 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 22:18:54,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:54,396 INFO L93 Difference]: Finished difference Result 65012 states and 95959 transitions. [2023-11-21 22:18:54,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:18:54,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 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 159 [2023-11-21 22:18:54,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:54,592 INFO L225 Difference]: With dead ends: 65012 [2023-11-21 22:18:54,592 INFO L226 Difference]: Without dead ends: 43151 [2023-11-21 22:18:54,664 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 22:18:54,665 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 346 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:54,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 455 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 22:18:54,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43151 states.