./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e8ee20bd48f38d06d172550f7b4afad7a85599a8fd397bba890e4eeccd52db93 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:11:11,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:11:11,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:11:11,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:11:11,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:11:11,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:11:11,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:11:11,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:11:11,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:11:11,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:11:11,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:11:11,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:11:11,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:11:11,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:11:11,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:11:11,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:11:11,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:11:11,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:11:11,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:11:11,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:11:11,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:11:11,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:11:11,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:11:11,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:11:11,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:11:11,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:11:11,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:11:11,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:11:11,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:11:11,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:11:11,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:11:11,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:11:11,246 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:11:11,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:11:11,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:11:11,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:11:11,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:11:11,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:11:11,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:11:11,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:11:11,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:11:11,257 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:11:11,300 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:11:11,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:11:11,306 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:11:11,306 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:11:11,307 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:11:11,307 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:11:11,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:11:11,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:11:11,309 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:11:11,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:11:11,310 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:11:11,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:11:11,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:11:11,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:11:11,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:11:11,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:11:11,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:11:11,312 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:11:11,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:11:11,313 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:11:11,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:11:11,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:11:11,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:11:11,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:11:11,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:11:11,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:11:11,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:11:11,317 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:11:11,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:11:11,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:11:11,318 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:11:11,318 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:11:11,318 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:11:11,319 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8ee20bd48f38d06d172550f7b4afad7a85599a8fd397bba890e4eeccd52db93 [2022-11-16 12:11:11,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:11:11,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:11:11,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:11:11,715 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:11:11,716 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:11:11,731 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c [2022-11-16 12:11:11,833 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/data/165b4bec8/fc74cd0ac4104a10979431c8bedaa61c/FLAG23bef8923 [2022-11-16 12:11:12,571 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:11:12,572 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c [2022-11-16 12:11:12,586 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/data/165b4bec8/fc74cd0ac4104a10979431c8bedaa61c/FLAG23bef8923 [2022-11-16 12:11:12,832 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/data/165b4bec8/fc74cd0ac4104a10979431c8bedaa61c [2022-11-16 12:11:12,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:11:12,837 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:11:12,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:11:12,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:11:12,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:11:12,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:11:12" (1/1) ... [2022-11-16 12:11:12,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4779b076 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:11:12, skipping insertion in model container [2022-11-16 12:11:12,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:11:12" (1/1) ... [2022-11-16 12:11:12,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:11:12,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:11:13,172 WARN L229 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_f1a48425-fd50-4f3e-bf92-a66793f0990a/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[913,926] [2022-11-16 12:11:13,218 WARN L229 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_f1a48425-fd50-4f3e-bf92-a66793f0990a/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[5977,5990] [2022-11-16 12:11:13,315 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:11:13,333 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:11:13,351 WARN L229 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_f1a48425-fd50-4f3e-bf92-a66793f0990a/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[913,926] [2022-11-16 12:11:13,380 WARN L229 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_f1a48425-fd50-4f3e-bf92-a66793f0990a/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[5977,5990] [2022-11-16 12:11:13,464 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:11:13,503 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:11:13,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:11:13 WrapperNode [2022-11-16 12:11:13,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:11:13,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:11:13,504 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:11:13,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:11:13,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:11:13" (1/1) ... [2022-11-16 12:11:13,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:11:13" (1/1) ... [2022-11-16 12:11:13,608 INFO L138 Inliner]: procedures = 64, calls = 73, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 828 [2022-11-16 12:11:13,608 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:11:13,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:11:13,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:11:13,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:11:13,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:11:13" (1/1) ... [2022-11-16 12:11:13,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:11:13" (1/1) ... [2022-11-16 12:11:13,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:11:13" (1/1) ... [2022-11-16 12:11:13,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:11:13" (1/1) ... [2022-11-16 12:11:13,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:11:13" (1/1) ... [2022-11-16 12:11:13,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:11:13" (1/1) ... [2022-11-16 12:11:13,678 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:11:13" (1/1) ... [2022-11-16 12:11:13,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:11:13" (1/1) ... [2022-11-16 12:11:13,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:11:13,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:11:13,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:11:13,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:11:13,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:11:13" (1/1) ... [2022-11-16 12:11:13,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:11:13,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:13,744 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:11:13,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:11:13,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:11:13,795 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-16 12:11:13,795 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-16 12:11:13,795 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-11-16 12:11:13,796 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-11-16 12:11:13,796 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-16 12:11:13,796 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-16 12:11:13,796 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-16 12:11:13,796 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-16 12:11:13,797 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-16 12:11:13,797 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-16 12:11:13,797 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-16 12:11:13,797 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-16 12:11:13,797 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-16 12:11:13,797 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-16 12:11:13,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:11:13,798 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-16 12:11:13,798 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-16 12:11:13,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:11:13,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:11:13,799 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-16 12:11:13,799 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-16 12:11:13,799 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-16 12:11:13,799 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-16 12:11:13,943 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:11:13,946 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:11:15,047 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:11:15,060 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:11:15,061 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-11-16 12:11:15,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:11:15 BoogieIcfgContainer [2022-11-16 12:11:15,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:11:15,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:11:15,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:11:15,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:11:15,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:11:12" (1/3) ... [2022-11-16 12:11:15,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2860bda7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:11:15, skipping insertion in model container [2022-11-16 12:11:15,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:11:13" (2/3) ... [2022-11-16 12:11:15,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2860bda7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:11:15, skipping insertion in model container [2022-11-16 12:11:15,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:11:15" (3/3) ... [2022-11-16 12:11:15,076 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.08.cil-2.c [2022-11-16 12:11:15,107 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:11:15,107 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-16 12:11:15,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:11:15,243 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=LoopsAndPotentialCycles, 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;@4bb72b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:11:15,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:11:15,256 INFO L276 IsEmpty]: Start isEmpty. Operand has 362 states, 319 states have (on average 1.6363636363636365) internal successors, (522), 326 states have internal predecessors, (522), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-16 12:11:15,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 12:11:15,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:15,274 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] [2022-11-16 12:11:15,275 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:15,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:15,284 INFO L85 PathProgramCache]: Analyzing trace with hash 975789426, now seen corresponding path program 1 times [2022-11-16 12:11:15,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:15,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107786592] [2022-11-16 12:11:15,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:15,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:15,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 12:11:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:15,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 12:11:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:15,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:15,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107786592] [2022-11-16 12:11:15,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107786592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:15,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:15,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:11:15,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557544008] [2022-11-16 12:11:15,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:15,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:15,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:15,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:15,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:15,773 INFO L87 Difference]: Start difference. First operand has 362 states, 319 states have (on average 1.6363636363636365) internal successors, (522), 326 states have internal predecessors, (522), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:16,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:16,479 INFO L93 Difference]: Finished difference Result 710 states and 1139 transitions. [2022-11-16 12:11:16,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:16,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2022-11-16 12:11:16,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:16,494 INFO L225 Difference]: With dead ends: 710 [2022-11-16 12:11:16,494 INFO L226 Difference]: Without dead ends: 360 [2022-11-16 12:11:16,500 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 [2022-11-16 12:11:16,503 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 308 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:16,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 861 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:11:16,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-11-16 12:11:16,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 351. [2022-11-16 12:11:16,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 311 states have (on average 1.540192926045016) internal successors, (479), 315 states have internal predecessors, (479), 30 states have call successors, (30), 10 states have call predecessors, (30), 8 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-16 12:11:16,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 535 transitions. [2022-11-16 12:11:16,574 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 535 transitions. Word has length 44 [2022-11-16 12:11:16,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:16,574 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 535 transitions. [2022-11-16 12:11:16,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:11:16,575 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 535 transitions. [2022-11-16 12:11:16,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 12:11:16,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:16,577 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] [2022-11-16 12:11:16,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:11:16,578 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:16,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:16,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1473810704, now seen corresponding path program 1 times [2022-11-16 12:11:16,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:16,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777707507] [2022-11-16 12:11:16,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:16,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:16,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 12:11:16,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:16,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 12:11:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:16,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:16,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777707507] [2022-11-16 12:11:16,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777707507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:16,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:16,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:11:16,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703375034] [2022-11-16 12:11:16,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:16,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:16,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:16,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:16,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:16,704 INFO L87 Difference]: Start difference. First operand 351 states and 535 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:11:17,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:17,177 INFO L93 Difference]: Finished difference Result 483 states and 720 transitions. [2022-11-16 12:11:17,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:17,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-11-16 12:11:17,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:17,188 INFO L225 Difference]: With dead ends: 483 [2022-11-16 12:11:17,189 INFO L226 Difference]: Without dead ends: 421 [2022-11-16 12:11:17,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:11:17,196 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 708 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:17,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 688 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:11:17,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-11-16 12:11:17,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 415. [2022-11-16 12:11:17,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 368 states have (on average 1.5081521739130435) internal successors, (555), 373 states have internal predecessors, (555), 34 states have call successors, (34), 12 states have call predecessors, (34), 11 states have return successors, (36), 30 states have call predecessors, (36), 30 states have call successors, (36) [2022-11-16 12:11:17,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 625 transitions. [2022-11-16 12:11:17,275 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 625 transitions. Word has length 44 [2022-11-16 12:11:17,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:17,276 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 625 transitions. [2022-11-16 12:11:17,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:11:17,276 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 625 transitions. [2022-11-16 12:11:17,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 12:11:17,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:17,290 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] [2022-11-16 12:11:17,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:11:17,290 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:17,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:17,292 INFO L85 PathProgramCache]: Analyzing trace with hash 852707101, now seen corresponding path program 1 times [2022-11-16 12:11:17,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:17,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724774893] [2022-11-16 12:11:17,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:17,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:17,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 12:11:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:17,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 12:11:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:17,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:17,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724774893] [2022-11-16 12:11:17,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724774893] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:17,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:17,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:11:17,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903071145] [2022-11-16 12:11:17,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:17,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:17,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:17,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:17,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:17,462 INFO L87 Difference]: Start difference. First operand 415 states and 625 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:11:18,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:18,115 INFO L93 Difference]: Finished difference Result 663 states and 965 transitions. [2022-11-16 12:11:18,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:18,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-11-16 12:11:18,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:18,120 INFO L225 Difference]: With dead ends: 663 [2022-11-16 12:11:18,121 INFO L226 Difference]: Without dead ends: 539 [2022-11-16 12:11:18,122 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 [2022-11-16 12:11:18,124 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 289 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:18,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 965 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:11:18,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-11-16 12:11:18,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 482. [2022-11-16 12:11:18,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 429 states have (on average 1.4895104895104896) internal successors, (639), 434 states have internal predecessors, (639), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (39), 33 states have call predecessors, (39), 33 states have call successors, (39) [2022-11-16 12:11:18,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 715 transitions. [2022-11-16 12:11:18,176 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 715 transitions. Word has length 45 [2022-11-16 12:11:18,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:18,177 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 715 transitions. [2022-11-16 12:11:18,178 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), 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) [2022-11-16 12:11:18,178 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 715 transitions. [2022-11-16 12:11:18,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 12:11:18,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:18,179 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] [2022-11-16 12:11:18,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:11:18,180 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:18,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:18,181 INFO L85 PathProgramCache]: Analyzing trace with hash -431650360, now seen corresponding path program 1 times [2022-11-16 12:11:18,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:18,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775667297] [2022-11-16 12:11:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:18,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:18,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 12:11:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:18,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 12:11:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:18,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:18,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775667297] [2022-11-16 12:11:18,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775667297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:18,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:18,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:11:18,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17472733] [2022-11-16 12:11:18,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:18,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:18,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:18,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:18,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:18,273 INFO L87 Difference]: Start difference. First operand 482 states and 715 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:11:18,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:18,853 INFO L93 Difference]: Finished difference Result 890 states and 1274 transitions. [2022-11-16 12:11:18,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:18,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-11-16 12:11:18,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:18,859 INFO L225 Difference]: With dead ends: 890 [2022-11-16 12:11:18,859 INFO L226 Difference]: Without dead ends: 699 [2022-11-16 12:11:18,860 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 [2022-11-16 12:11:18,862 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 725 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:18,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 707 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:11:18,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-11-16 12:11:18,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 647. [2022-11-16 12:11:18,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 575 states have (on average 1.4417391304347826) internal successors, (829), 583 states have internal predecessors, (829), 48 states have call successors, (48), 22 states have call predecessors, (48), 22 states have return successors, (56), 42 states have call predecessors, (56), 44 states have call successors, (56) [2022-11-16 12:11:18,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 933 transitions. [2022-11-16 12:11:18,941 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 933 transitions. Word has length 45 [2022-11-16 12:11:18,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:18,942 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 933 transitions. [2022-11-16 12:11:18,942 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), 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) [2022-11-16 12:11:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 933 transitions. [2022-11-16 12:11:18,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-16 12:11:18,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:18,946 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:18,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:11:18,948 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:18,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:18,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1757585952, now seen corresponding path program 1 times [2022-11-16 12:11:18,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:18,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107571845] [2022-11-16 12:11:18,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:18,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:19,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 12:11:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:19,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-16 12:11:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:19,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-16 12:11:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:11:19,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:19,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107571845] [2022-11-16 12:11:19,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107571845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:19,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:19,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:11:19,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264710872] [2022-11-16 12:11:19,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:19,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:19,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:19,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:19,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:19,144 INFO L87 Difference]: Start difference. First operand 647 states and 933 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 12:11:19,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:19,863 INFO L93 Difference]: Finished difference Result 991 states and 1394 transitions. [2022-11-16 12:11:19,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:19,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2022-11-16 12:11:19,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:19,868 INFO L225 Difference]: With dead ends: 991 [2022-11-16 12:11:19,868 INFO L226 Difference]: Without dead ends: 754 [2022-11-16 12:11:19,870 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 [2022-11-16 12:11:19,871 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 273 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:19,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 1015 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:11:19,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-11-16 12:11:19,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 716. [2022-11-16 12:11:19,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 635 states have (on average 1.415748031496063) internal successors, (899), 644 states have internal predecessors, (899), 53 states have call successors, (53), 25 states have call predecessors, (53), 26 states have return successors, (65), 47 states have call predecessors, (65), 49 states have call successors, (65) [2022-11-16 12:11:19,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1017 transitions. [2022-11-16 12:11:19,966 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1017 transitions. Word has length 62 [2022-11-16 12:11:19,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:19,967 INFO L495 AbstractCegarLoop]: Abstraction has 716 states and 1017 transitions. [2022-11-16 12:11:19,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 12:11:19,968 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1017 transitions. [2022-11-16 12:11:19,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-16 12:11:19,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:19,971 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:19,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:11:19,973 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:19,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:19,973 INFO L85 PathProgramCache]: Analyzing trace with hash 2041601228, now seen corresponding path program 1 times [2022-11-16 12:11:19,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:19,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163639899] [2022-11-16 12:11:19,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:19,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:20,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 12:11:20,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:20,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 12:11:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:20,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-16 12:11:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 12:11:20,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:20,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163639899] [2022-11-16 12:11:20,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163639899] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:20,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:20,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:11:20,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559583023] [2022-11-16 12:11:20,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:20,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:20,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:20,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:20,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:20,095 INFO L87 Difference]: Start difference. First operand 716 states and 1017 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 12:11:20,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:20,642 INFO L93 Difference]: Finished difference Result 1267 states and 1739 transitions. [2022-11-16 12:11:20,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:20,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-11-16 12:11:20,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:20,648 INFO L225 Difference]: With dead ends: 1267 [2022-11-16 12:11:20,648 INFO L226 Difference]: Without dead ends: 889 [2022-11-16 12:11:20,649 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 [2022-11-16 12:11:20,650 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 712 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:20,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 705 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:11:20,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-11-16 12:11:20,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 834. [2022-11-16 12:11:20,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 740 states have (on average 1.385135135135135) internal successors, (1025), 750 states have internal predecessors, (1025), 60 states have call successors, (60), 30 states have call predecessors, (60), 32 states have return successors, (76), 54 states have call predecessors, (76), 56 states have call successors, (76) [2022-11-16 12:11:20,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1161 transitions. [2022-11-16 12:11:20,724 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1161 transitions. Word has length 67 [2022-11-16 12:11:20,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:20,724 INFO L495 AbstractCegarLoop]: Abstraction has 834 states and 1161 transitions. [2022-11-16 12:11:20,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 12:11:20,725 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1161 transitions. [2022-11-16 12:11:20,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 12:11:20,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:20,727 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:20,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:11:20,727 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:20,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:20,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1554818621, now seen corresponding path program 1 times [2022-11-16 12:11:20,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:20,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285271563] [2022-11-16 12:11:20,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:20,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:20,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 12:11:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:20,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:11:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:20,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-16 12:11:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:11:20,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:20,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285271563] [2022-11-16 12:11:20,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285271563] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:20,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562679791] [2022-11-16 12:11:20,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:20,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:20,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:20,919 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:20,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:11:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:21,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 12:11:21,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:21,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 12:11:21,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562679791] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:21,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:11:21,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-11-16 12:11:21,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765629143] [2022-11-16 12:11:21,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:21,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:21,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:21,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:21,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:11:21,420 INFO L87 Difference]: Start difference. First operand 834 states and 1161 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 12:11:21,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:21,651 INFO L93 Difference]: Finished difference Result 889 states and 1228 transitions. [2022-11-16 12:11:21,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:11:21,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-11-16 12:11:21,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:21,658 INFO L225 Difference]: With dead ends: 889 [2022-11-16 12:11:21,658 INFO L226 Difference]: Without dead ends: 886 [2022-11-16 12:11:21,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:11:21,662 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 965 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:21,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [965 Valid, 627 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:11:21,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-11-16 12:11:21,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 833. [2022-11-16 12:11:21,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 740 states have (on average 1.3824324324324324) internal successors, (1023), 749 states have internal predecessors, (1023), 59 states have call successors, (59), 30 states have call predecessors, (59), 32 states have return successors, (76), 54 states have call predecessors, (76), 56 states have call successors, (76) [2022-11-16 12:11:21,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1158 transitions. [2022-11-16 12:11:21,762 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1158 transitions. Word has length 68 [2022-11-16 12:11:21,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:21,762 INFO L495 AbstractCegarLoop]: Abstraction has 833 states and 1158 transitions. [2022-11-16 12:11:21,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 12:11:21,763 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1158 transitions. [2022-11-16 12:11:21,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 12:11:21,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:21,765 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:21,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:21,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:21,973 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:21,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:21,973 INFO L85 PathProgramCache]: Analyzing trace with hash 953609583, now seen corresponding path program 1 times [2022-11-16 12:11:21,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:21,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249946328] [2022-11-16 12:11:21,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:21,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:22,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 12:11:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:22,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:11:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:22,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-16 12:11:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:11:22,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:22,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249946328] [2022-11-16 12:11:22,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249946328] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:22,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358684189] [2022-11-16 12:11:22,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:22,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:22,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:22,215 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:22,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:11:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:22,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:11:22,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:22,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 12:11:22,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358684189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:22,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:11:22,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-11-16 12:11:22,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419125278] [2022-11-16 12:11:22,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:22,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:11:22,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:22,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:11:22,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:11:22,810 INFO L87 Difference]: Start difference. First operand 833 states and 1158 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-16 12:11:25,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:25,010 INFO L93 Difference]: Finished difference Result 2362 states and 3155 transitions. [2022-11-16 12:11:25,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 12:11:25,011 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2022-11-16 12:11:25,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:25,019 INFO L225 Difference]: With dead ends: 2362 [2022-11-16 12:11:25,020 INFO L226 Difference]: Without dead ends: 1918 [2022-11-16 12:11:25,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 12:11:25,024 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 1079 mSDsluCounter, 2614 mSDsCounter, 0 mSdLazyCounter, 1761 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 3079 SdHoareTripleChecker+Invalid, 1808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:25,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1108 Valid, 3079 Invalid, 1808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1761 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 12:11:25,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2022-11-16 12:11:25,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1207. [2022-11-16 12:11:25,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1078 states have (on average 1.3413729128014842) internal successors, (1446), 1093 states have internal predecessors, (1446), 78 states have call successors, (78), 43 states have call predecessors, (78), 49 states have return successors, (107), 71 states have call predecessors, (107), 75 states have call successors, (107) [2022-11-16 12:11:25,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1631 transitions. [2022-11-16 12:11:25,139 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1631 transitions. Word has length 69 [2022-11-16 12:11:25,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:25,140 INFO L495 AbstractCegarLoop]: Abstraction has 1207 states and 1631 transitions. [2022-11-16 12:11:25,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-16 12:11:25,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1631 transitions. [2022-11-16 12:11:25,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-16 12:11:25,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:25,143 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:25,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:25,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:25,349 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:25,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:25,349 INFO L85 PathProgramCache]: Analyzing trace with hash 2034031846, now seen corresponding path program 1 times [2022-11-16 12:11:25,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:25,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094919874] [2022-11-16 12:11:25,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:25,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:25,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 12:11:25,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:25,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:11:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:25,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-16 12:11:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:25,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 12:11:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 12:11:25,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:25,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094919874] [2022-11-16 12:11:25,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094919874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:25,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662828030] [2022-11-16 12:11:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:25,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:25,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:25,485 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:25,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:11:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:25,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:11:25,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 12:11:25,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:25,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662828030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:25,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:11:25,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-16 12:11:25,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257908447] [2022-11-16 12:11:25,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:25,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:11:25,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:25,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:11:25,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:11:25,686 INFO L87 Difference]: Start difference. First operand 1207 states and 1631 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 12:11:25,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:25,834 INFO L93 Difference]: Finished difference Result 1851 states and 2469 transitions. [2022-11-16 12:11:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:11:25,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2022-11-16 12:11:25,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:25,841 INFO L225 Difference]: With dead ends: 1851 [2022-11-16 12:11:25,841 INFO L226 Difference]: Without dead ends: 1103 [2022-11-16 12:11:25,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:11:25,845 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 496 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:25,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 640 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:11:25,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2022-11-16 12:11:25,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 1091. [2022-11-16 12:11:25,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 975 states have (on average 1.3425641025641026) internal successors, (1309), 990 states have internal predecessors, (1309), 71 states have call successors, (71), 38 states have call predecessors, (71), 43 states have return successors, (96), 63 states have call predecessors, (96), 68 states have call successors, (96) [2022-11-16 12:11:25,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1476 transitions. [2022-11-16 12:11:25,942 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1476 transitions. Word has length 88 [2022-11-16 12:11:25,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:25,942 INFO L495 AbstractCegarLoop]: Abstraction has 1091 states and 1476 transitions. [2022-11-16 12:11:25,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 12:11:25,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1476 transitions. [2022-11-16 12:11:25,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-16 12:11:25,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:25,946 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:25,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:26,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 12:11:26,152 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:26,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:26,153 INFO L85 PathProgramCache]: Analyzing trace with hash 487728341, now seen corresponding path program 1 times [2022-11-16 12:11:26,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:26,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928841487] [2022-11-16 12:11:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:26,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:26,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 12:11:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:26,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:11:26,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:26,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-16 12:11:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:26,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-16 12:11:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:26,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-16 12:11:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 12:11:26,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:26,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928841487] [2022-11-16 12:11:26,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928841487] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:11:26,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944688492] [2022-11-16 12:11:26,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:26,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:11:26,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:11:26,279 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:11:26,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:11:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:26,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:11:26,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 12:11:26,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:26,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944688492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:26,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:11:26,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-16 12:11:26,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369597124] [2022-11-16 12:11:26,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:26,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:11:26,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:26,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:11:26,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:11:26,446 INFO L87 Difference]: Start difference. First operand 1091 states and 1476 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-16 12:11:26,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:26,549 INFO L93 Difference]: Finished difference Result 1403 states and 1864 transitions. [2022-11-16 12:11:26,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:11:26,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2022-11-16 12:11:26,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:26,551 INFO L225 Difference]: With dead ends: 1403 [2022-11-16 12:11:26,551 INFO L226 Difference]: Without dead ends: 285 [2022-11-16 12:11:26,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:11:26,554 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 61 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:26,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1089 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:11:26,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-16 12:11:26,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-11-16 12:11:26,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 254 states have (on average 1.5669291338582678) internal successors, (398), 256 states have internal predecessors, (398), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-16 12:11:26,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 444 transitions. [2022-11-16 12:11:26,575 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 444 transitions. Word has length 103 [2022-11-16 12:11:26,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:26,576 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 444 transitions. [2022-11-16 12:11:26,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-16 12:11:26,576 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 444 transitions. [2022-11-16 12:11:26,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-16 12:11:26,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:26,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:26,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:26,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a48425-fd50-4f3e-bf92-a66793f0990a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:11:26,783 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:26,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:26,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1195242880, now seen corresponding path program 1 times [2022-11-16 12:11:26,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:26,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628979638] [2022-11-16 12:11:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:26,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:26,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:11:26,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:26,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 12:11:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:26,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-16 12:11:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:26,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-16 12:11:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:26,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-16 12:11:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:26,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:26,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628979638] [2022-11-16 12:11:26,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628979638] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:26,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:26,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:11:26,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817494053] [2022-11-16 12:11:26,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:26,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:11:26,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:26,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:11:26,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:11:26,921 INFO L87 Difference]: Start difference. First operand 285 states and 444 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 12:11:28,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:28,724 INFO L93 Difference]: Finished difference Result 659 states and 1044 transitions. [2022-11-16 12:11:28,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:11:28,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2022-11-16 12:11:28,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:28,727 INFO L225 Difference]: With dead ends: 659 [2022-11-16 12:11:28,728 INFO L226 Difference]: Without dead ends: 383 [2022-11-16 12:11:28,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:11:28,730 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 746 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:28,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [766 Valid, 573 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 12:11:28,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-11-16 12:11:28,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 285. [2022-11-16 12:11:28,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 254 states have (on average 1.562992125984252) internal successors, (397), 256 states have internal predecessors, (397), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-16 12:11:28,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 443 transitions. [2022-11-16 12:11:28,771 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 443 transitions. Word has length 135 [2022-11-16 12:11:28,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:28,772 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 443 transitions. [2022-11-16 12:11:28,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 12:11:28,773 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 443 transitions. [2022-11-16 12:11:28,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-16 12:11:28,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:28,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:28,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 12:11:28,779 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:28,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:28,781 INFO L85 PathProgramCache]: Analyzing trace with hash -488646274, now seen corresponding path program 1 times [2022-11-16 12:11:28,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:28,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363470240] [2022-11-16 12:11:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:28,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:28,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:11:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:28,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 12:11:28,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:28,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-16 12:11:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:29,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-16 12:11:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:29,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-16 12:11:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:29,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:29,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:29,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363470240] [2022-11-16 12:11:29,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363470240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:29,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:29,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:11:29,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617602527] [2022-11-16 12:11:29,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:29,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:11:29,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:29,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:11:29,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:11:29,029 INFO L87 Difference]: Start difference. First operand 285 states and 443 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 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) [2022-11-16 12:11:32,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:32,097 INFO L93 Difference]: Finished difference Result 1027 states and 1634 transitions. [2022-11-16 12:11:32,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:11:32,098 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 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 135 [2022-11-16 12:11:32,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:32,103 INFO L225 Difference]: With dead ends: 1027 [2022-11-16 12:11:32,103 INFO L226 Difference]: Without dead ends: 759 [2022-11-16 12:11:32,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:11:32,105 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 1117 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 1784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:32,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1132 Valid, 1005 Invalid, 1784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1684 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-16 12:11:32,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-11-16 12:11:32,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 562. [2022-11-16 12:11:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 507 states have (on average 1.5759368836291914) internal successors, (799), 510 states have internal predecessors, (799), 41 states have call successors, (41), 13 states have call predecessors, (41), 13 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2022-11-16 12:11:32,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 882 transitions. [2022-11-16 12:11:32,189 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 882 transitions. Word has length 135 [2022-11-16 12:11:32,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:32,190 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 882 transitions. [2022-11-16 12:11:32,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 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) [2022-11-16 12:11:32,191 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 882 transitions. [2022-11-16 12:11:32,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-16 12:11:32,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:32,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:32,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 12:11:32,194 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:32,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:32,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1850648710, now seen corresponding path program 1 times [2022-11-16 12:11:32,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:32,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820073063] [2022-11-16 12:11:32,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:32,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:32,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:11:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:32,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 12:11:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:32,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-16 12:11:32,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:32,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-16 12:11:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:32,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-16 12:11:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:32,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:32,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820073063] [2022-11-16 12:11:32,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820073063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:32,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:32,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:11:32,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083825994] [2022-11-16 12:11:32,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:32,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:11:32,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:32,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:11:32,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:11:32,547 INFO L87 Difference]: Start difference. First operand 562 states and 882 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-11-16 12:11:36,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:36,349 INFO L93 Difference]: Finished difference Result 1690 states and 2692 transitions. [2022-11-16 12:11:36,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:11:36,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2022-11-16 12:11:36,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:36,360 INFO L225 Difference]: With dead ends: 1690 [2022-11-16 12:11:36,361 INFO L226 Difference]: Without dead ends: 1145 [2022-11-16 12:11:36,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:11:36,364 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 1132 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1147 SdHoareTripleChecker+Valid, 1877 SdHoareTripleChecker+Invalid, 2612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:36,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1147 Valid, 1877 Invalid, 2612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2553 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-16 12:11:36,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2022-11-16 12:11:36,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 820. [2022-11-16 12:11:36,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 741 states have (on average 1.5695006747638327) internal successors, (1163), 745 states have internal predecessors, (1163), 58 states have call successors, (58), 19 states have call predecessors, (58), 20 states have return successors, (61), 57 states have call predecessors, (61), 56 states have call successors, (61) [2022-11-16 12:11:36,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1282 transitions. [2022-11-16 12:11:36,480 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1282 transitions. Word has length 135 [2022-11-16 12:11:36,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:36,481 INFO L495 AbstractCegarLoop]: Abstraction has 820 states and 1282 transitions. [2022-11-16 12:11:36,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-11-16 12:11:36,481 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1282 transitions. [2022-11-16 12:11:36,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-16 12:11:36,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:36,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:36,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 12:11:36,485 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:36,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:36,485 INFO L85 PathProgramCache]: Analyzing trace with hash 78283516, now seen corresponding path program 1 times [2022-11-16 12:11:36,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:36,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384305830] [2022-11-16 12:11:36,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:36,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:36,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:36,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:11:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:36,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 12:11:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:36,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-16 12:11:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:36,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-16 12:11:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:36,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-16 12:11:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:36,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:36,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:36,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384305830] [2022-11-16 12:11:36,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384305830] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:36,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:36,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:11:36,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234806575] [2022-11-16 12:11:36,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:36,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:11:36,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:36,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:11:36,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:11:36,791 INFO L87 Difference]: Start difference. First operand 820 states and 1282 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-11-16 12:11:40,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:40,731 INFO L93 Difference]: Finished difference Result 2667 states and 4240 transitions. [2022-11-16 12:11:40,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:11:40,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2022-11-16 12:11:40,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:40,745 INFO L225 Difference]: With dead ends: 2667 [2022-11-16 12:11:40,745 INFO L226 Difference]: Without dead ends: 1864 [2022-11-16 12:11:40,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:11:40,749 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 1130 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 2549 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 1875 SdHoareTripleChecker+Invalid, 2610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:40,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1145 Valid, 1875 Invalid, 2610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2549 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-16 12:11:40,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2022-11-16 12:11:40,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1337. [2022-11-16 12:11:40,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1210 states have (on average 1.5636363636363637) internal successors, (1892), 1216 states have internal predecessors, (1892), 92 states have call successors, (92), 31 states have call predecessors, (92), 34 states have return successors, (103), 93 states have call predecessors, (103), 90 states have call successors, (103) [2022-11-16 12:11:40,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 2087 transitions. [2022-11-16 12:11:41,038 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 2087 transitions. Word has length 135 [2022-11-16 12:11:41,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:41,038 INFO L495 AbstractCegarLoop]: Abstraction has 1337 states and 2087 transitions. [2022-11-16 12:11:41,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-11-16 12:11:41,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 2087 transitions. [2022-11-16 12:11:41,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-16 12:11:41,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:41,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:41,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 12:11:41,041 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:41,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:41,042 INFO L85 PathProgramCache]: Analyzing trace with hash 2080169786, now seen corresponding path program 1 times [2022-11-16 12:11:41,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:41,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496100821] [2022-11-16 12:11:41,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:41,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:41,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:11:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:41,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 12:11:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:41,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-16 12:11:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:41,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-16 12:11:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:41,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-16 12:11:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:41,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:41,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496100821] [2022-11-16 12:11:41,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496100821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:41,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:41,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:11:41,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316740842] [2022-11-16 12:11:41,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:41,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:11:41,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:41,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:11:41,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:11:41,331 INFO L87 Difference]: Start difference. First operand 1337 states and 2087 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-11-16 12:11:45,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:45,541 INFO L93 Difference]: Finished difference Result 4548 states and 7205 transitions. [2022-11-16 12:11:45,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:11:45,542 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2022-11-16 12:11:45,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:45,558 INFO L225 Difference]: With dead ends: 4548 [2022-11-16 12:11:45,558 INFO L226 Difference]: Without dead ends: 3228 [2022-11-16 12:11:45,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:11:45,564 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 1126 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 2540 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1141 SdHoareTripleChecker+Valid, 1875 SdHoareTripleChecker+Invalid, 2601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:45,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1141 Valid, 1875 Invalid, 2601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2540 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-16 12:11:45,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2022-11-16 12:11:45,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2372. [2022-11-16 12:11:45,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 2149 states have (on average 1.5588645881805492) internal successors, (3350), 2159 states have internal predecessors, (3350), 160 states have call successors, (160), 55 states have call predecessors, (160), 62 states have return successors, (193), 165 states have call predecessors, (193), 158 states have call successors, (193) [2022-11-16 12:11:45,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3703 transitions. [2022-11-16 12:11:45,938 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3703 transitions. Word has length 135 [2022-11-16 12:11:45,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:45,938 INFO L495 AbstractCegarLoop]: Abstraction has 2372 states and 3703 transitions. [2022-11-16 12:11:45,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-11-16 12:11:45,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3703 transitions. [2022-11-16 12:11:45,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-16 12:11:45,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:45,943 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:45,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 12:11:45,943 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:45,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:45,944 INFO L85 PathProgramCache]: Analyzing trace with hash -487652548, now seen corresponding path program 1 times [2022-11-16 12:11:45,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:45,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334786494] [2022-11-16 12:11:45,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:45,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:46,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:11:46,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:46,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 12:11:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:46,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-16 12:11:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:46,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-16 12:11:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:46,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-16 12:11:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:46,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:46,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334786494] [2022-11-16 12:11:46,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334786494] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:46,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:46,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:11:46,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271757523] [2022-11-16 12:11:46,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:46,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:11:46,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:46,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:11:46,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:11:46,193 INFO L87 Difference]: Start difference. First operand 2372 states and 3703 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-11-16 12:11:50,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:50,460 INFO L93 Difference]: Finished difference Result 8309 states and 13151 transitions. [2022-11-16 12:11:50,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:11:50,461 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2022-11-16 12:11:50,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:50,496 INFO L225 Difference]: With dead ends: 8309 [2022-11-16 12:11:50,496 INFO L226 Difference]: Without dead ends: 5954 [2022-11-16 12:11:50,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:11:50,507 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 1122 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 1875 SdHoareTripleChecker+Invalid, 2592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:50,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1137 Valid, 1875 Invalid, 2592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-16 12:11:50,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5954 states. [2022-11-16 12:11:51,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5954 to 4447. [2022-11-16 12:11:51,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4447 states, 4032 states have (on average 1.5555555555555556) internal successors, (6272), 4050 states have internal predecessors, (6272), 296 states have call successors, (296), 103 states have call predecessors, (296), 118 states have return successors, (391), 309 states have call predecessors, (391), 294 states have call successors, (391) [2022-11-16 12:11:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 6959 transitions. [2022-11-16 12:11:51,495 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 6959 transitions. Word has length 135 [2022-11-16 12:11:51,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:51,496 INFO L495 AbstractCegarLoop]: Abstraction has 4447 states and 6959 transitions. [2022-11-16 12:11:51,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-11-16 12:11:51,496 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 6959 transitions. [2022-11-16 12:11:51,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-16 12:11:51,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:51,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:51,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 12:11:51,502 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:51,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:51,503 INFO L85 PathProgramCache]: Analyzing trace with hash -16296198, now seen corresponding path program 1 times [2022-11-16 12:11:51,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:51,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583885638] [2022-11-16 12:11:51,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:51,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:51,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:11:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:51,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 12:11:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:51,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-16 12:11:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:51,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-16 12:11:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:51,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-16 12:11:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:51,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:51,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583885638] [2022-11-16 12:11:51,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583885638] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:51,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:51,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:11:51,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978951254] [2022-11-16 12:11:51,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:51,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:11:51,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:51,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:11:51,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:11:51,762 INFO L87 Difference]: Start difference. First operand 4447 states and 6959 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-11-16 12:11:54,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:54,355 INFO L93 Difference]: Finished difference Result 10448 states and 16604 transitions. [2022-11-16 12:11:54,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:11:54,355 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2022-11-16 12:11:54,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:54,387 INFO L225 Difference]: With dead ends: 10448 [2022-11-16 12:11:54,387 INFO L226 Difference]: Without dead ends: 6018 [2022-11-16 12:11:54,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:11:54,402 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 942 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:54,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [958 Valid, 793 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-16 12:11:54,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6018 states. [2022-11-16 12:11:55,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6018 to 4447. [2022-11-16 12:11:55,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4447 states, 4032 states have (on average 1.5513392857142858) internal successors, (6255), 4050 states have internal predecessors, (6255), 296 states have call successors, (296), 103 states have call predecessors, (296), 118 states have return successors, (391), 309 states have call predecessors, (391), 294 states have call successors, (391) [2022-11-16 12:11:55,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 6942 transitions. [2022-11-16 12:11:55,293 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 6942 transitions. Word has length 135 [2022-11-16 12:11:55,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:55,293 INFO L495 AbstractCegarLoop]: Abstraction has 4447 states and 6942 transitions. [2022-11-16 12:11:55,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-11-16 12:11:55,294 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 6942 transitions. [2022-11-16 12:11:55,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-16 12:11:55,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:55,299 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:55,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 12:11:55,300 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:55,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:55,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1663659140, now seen corresponding path program 1 times [2022-11-16 12:11:55,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:55,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873338977] [2022-11-16 12:11:55,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:55,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:55,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:55,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:11:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:55,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 12:11:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:55,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-16 12:11:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:55,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-16 12:11:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:55,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-16 12:11:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:55,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:55,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873338977] [2022-11-16 12:11:55,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873338977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:55,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:55,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:11:55,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742300609] [2022-11-16 12:11:55,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:55,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:11:55,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:55,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:11:55,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:11:55,538 INFO L87 Difference]: Start difference. First operand 4447 states and 6942 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-11-16 12:11:58,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:58,243 INFO L93 Difference]: Finished difference Result 10430 states and 16518 transitions. [2022-11-16 12:11:58,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:11:58,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2022-11-16 12:11:58,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:58,269 INFO L225 Difference]: With dead ends: 10430 [2022-11-16 12:11:58,269 INFO L226 Difference]: Without dead ends: 6000 [2022-11-16 12:11:58,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:11:58,282 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 872 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:58,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 944 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 12:11:58,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6000 states. [2022-11-16 12:11:59,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6000 to 4447. [2022-11-16 12:11:59,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4447 states, 4032 states have (on average 1.5471230158730158) internal successors, (6238), 4050 states have internal predecessors, (6238), 296 states have call successors, (296), 103 states have call predecessors, (296), 118 states have return successors, (391), 309 states have call predecessors, (391), 294 states have call successors, (391) [2022-11-16 12:11:59,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 6925 transitions. [2022-11-16 12:11:59,041 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 6925 transitions. Word has length 135 [2022-11-16 12:11:59,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:59,042 INFO L495 AbstractCegarLoop]: Abstraction has 4447 states and 6925 transitions. [2022-11-16 12:11:59,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-11-16 12:11:59,042 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 6925 transitions. [2022-11-16 12:11:59,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-16 12:11:59,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:59,045 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:59,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 12:11:59,045 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:11:59,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:59,046 INFO L85 PathProgramCache]: Analyzing trace with hash 499957434, now seen corresponding path program 1 times [2022-11-16 12:11:59,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:11:59,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362595063] [2022-11-16 12:11:59,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:59,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:11:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:59,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:11:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:59,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 12:11:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:59,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-16 12:11:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:59,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-16 12:11:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:59,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-16 12:11:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:59,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:11:59,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362595063] [2022-11-16 12:11:59,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362595063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:59,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:59,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:11:59,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321502595] [2022-11-16 12:11:59,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:59,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:11:59,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:11:59,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:11:59,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:11:59,253 INFO L87 Difference]: Start difference. First operand 4447 states and 6925 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-11-16 12:12:04,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:12:04,390 INFO L93 Difference]: Finished difference Result 15775 states and 24829 transitions. [2022-11-16 12:12:04,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:12:04,390 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2022-11-16 12:12:04,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:12:04,436 INFO L225 Difference]: With dead ends: 15775 [2022-11-16 12:12:04,437 INFO L226 Difference]: Without dead ends: 11345 [2022-11-16 12:12:04,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:12:04,452 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 1108 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 2450 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 1875 SdHoareTripleChecker+Invalid, 2511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:12:04,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1123 Valid, 1875 Invalid, 2511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2450 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-16 12:12:04,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11345 states. [2022-11-16 12:12:06,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11345 to 8659. [2022-11-16 12:12:06,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8659 states, 7860 states have (on average 1.5440203562340966) internal successors, (12136), 7894 states have internal predecessors, (12136), 568 states have call successors, (568), 199 states have call predecessors, (568), 230 states have return successors, (841), 597 states have call predecessors, (841), 566 states have call successors, (841) [2022-11-16 12:12:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8659 states to 8659 states and 13545 transitions. [2022-11-16 12:12:06,049 INFO L78 Accepts]: Start accepts. Automaton has 8659 states and 13545 transitions. Word has length 135 [2022-11-16 12:12:06,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:12:06,050 INFO L495 AbstractCegarLoop]: Abstraction has 8659 states and 13545 transitions. [2022-11-16 12:12:06,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-11-16 12:12:06,051 INFO L276 IsEmpty]: Start isEmpty. Operand 8659 states and 13545 transitions. [2022-11-16 12:12:06,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-16 12:12:06,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:12:06,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:12:06,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 12:12:06,061 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:12:06,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:12:06,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1473207944, now seen corresponding path program 1 times [2022-11-16 12:12:06,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:12:06,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225308451] [2022-11-16 12:12:06,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:12:06,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:12:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:06,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:12:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:06,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 12:12:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:06,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-16 12:12:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:06,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-16 12:12:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:06,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-16 12:12:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:12:06,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:12:06,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225308451] [2022-11-16 12:12:06,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225308451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:12:06,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:12:06,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:12:06,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111399036] [2022-11-16 12:12:06,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:12:06,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:12:06,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:12:06,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:12:06,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:12:06,320 INFO L87 Difference]: Start difference. First operand 8659 states and 13545 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-11-16 12:12:14,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:12:14,846 INFO L93 Difference]: Finished difference Result 34689 states and 54625 transitions. [2022-11-16 12:12:14,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:12:14,847 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2022-11-16 12:12:14,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:12:14,962 INFO L225 Difference]: With dead ends: 34689 [2022-11-16 12:12:14,963 INFO L226 Difference]: Without dead ends: 26047 [2022-11-16 12:12:14,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:12:14,993 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 1437 mSDsluCounter, 1439 mSDsCounter, 0 mSdLazyCounter, 2430 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1461 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 2496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:12:14,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1461 Valid, 1865 Invalid, 2496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2430 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-16 12:12:15,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26047 states. [2022-11-16 12:12:18,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26047 to 17012. [2022-11-16 12:12:18,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17012 states, 15477 states have (on average 1.5443561413710667) internal successors, (23902), 15543 states have internal predecessors, (23902), 1080 states have call successors, (1080), 391 states have call predecessors, (1080), 454 states have return successors, (1871), 1141 states have call predecessors, (1871), 1078 states have call successors, (1871) [2022-11-16 12:12:18,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17012 states to 17012 states and 26853 transitions. [2022-11-16 12:12:18,598 INFO L78 Accepts]: Start accepts. Automaton has 17012 states and 26853 transitions. Word has length 135 [2022-11-16 12:12:18,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:12:18,598 INFO L495 AbstractCegarLoop]: Abstraction has 17012 states and 26853 transitions. [2022-11-16 12:12:18,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-11-16 12:12:18,599 INFO L276 IsEmpty]: Start isEmpty. Operand 17012 states and 26853 transitions. [2022-11-16 12:12:18,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-16 12:12:18,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:12:18,613 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:12:18,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-16 12:12:18,613 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:12:18,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:12:18,614 INFO L85 PathProgramCache]: Analyzing trace with hash 679898874, now seen corresponding path program 1 times [2022-11-16 12:12:18,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:12:18,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20041200] [2022-11-16 12:12:18,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:12:18,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:12:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:18,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:12:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:18,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 12:12:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:18,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-16 12:12:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:18,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-16 12:12:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:18,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-16 12:12:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:12:18,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:12:18,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20041200] [2022-11-16 12:12:18,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20041200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:12:18,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:12:18,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:12:18,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613626582] [2022-11-16 12:12:18,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:12:18,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:12:18,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:12:18,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:12:18,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:12:18,868 INFO L87 Difference]: Start difference. First operand 17012 states and 26853 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-11-16 12:12:34,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:12:34,567 INFO L93 Difference]: Finished difference Result 67584 states and 107315 transitions. [2022-11-16 12:12:34,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:12:34,567 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2022-11-16 12:12:34,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:12:34,772 INFO L225 Difference]: With dead ends: 67584 [2022-11-16 12:12:34,772 INFO L226 Difference]: Without dead ends: 50589 [2022-11-16 12:12:34,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:12:34,827 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 1178 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 2909 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1192 SdHoareTripleChecker+Valid, 1861 SdHoareTripleChecker+Invalid, 2972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:12:34,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1192 Valid, 1861 Invalid, 2972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2909 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-16 12:12:34,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50589 states. [2022-11-16 12:12:41,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50589 to 33045. [2022-11-16 12:12:41,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33045 states, 30070 states have (on average 1.5401396740937812) internal successors, (46312), 30200 states have internal predecessors, (46312), 2072 states have call successors, (2072), 775 states have call predecessors, (2072), 902 states have return successors, (4385), 2197 states have call predecessors, (4385), 2070 states have call successors, (4385) [2022-11-16 12:12:41,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33045 states to 33045 states and 52769 transitions. [2022-11-16 12:12:41,680 INFO L78 Accepts]: Start accepts. Automaton has 33045 states and 52769 transitions. Word has length 135 [2022-11-16 12:12:41,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:12:41,680 INFO L495 AbstractCegarLoop]: Abstraction has 33045 states and 52769 transitions. [2022-11-16 12:12:41,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-11-16 12:12:41,681 INFO L276 IsEmpty]: Start isEmpty. Operand 33045 states and 52769 transitions. [2022-11-16 12:12:41,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-16 12:12:41,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:12:41,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:12:41,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-16 12:12:41,705 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:12:41,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:12:41,705 INFO L85 PathProgramCache]: Analyzing trace with hash 56617272, now seen corresponding path program 1 times [2022-11-16 12:12:41,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:12:41,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458725994] [2022-11-16 12:12:41,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:12:41,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:12:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:41,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 12:12:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:41,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-16 12:12:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:41,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-16 12:12:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:41,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-16 12:12:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:41,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-16 12:12:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:12:41,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:12:41,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458725994] [2022-11-16 12:12:41,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458725994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:12:41,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:12:41,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:12:41,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597089235] [2022-11-16 12:12:41,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:12:41,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:12:41,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:12:41,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:12:41,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:12:41,928 INFO L87 Difference]: Start difference. First operand 33045 states and 52769 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-11-16 12:13:07,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:13:07,444 INFO L93 Difference]: Finished difference Result 130271 states and 209233 transitions. [2022-11-16 12:13:07,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:13:07,445 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2022-11-16 12:13:07,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:13:07,863 INFO L225 Difference]: With dead ends: 130271 [2022-11-16 12:13:07,864 INFO L226 Difference]: Without dead ends: 97243 [2022-11-16 12:13:07,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:13:07,960 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 1357 mSDsluCounter, 1439 mSDsCounter, 0 mSdLazyCounter, 2404 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1381 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 2470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:13:07,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1381 Valid, 1865 Invalid, 2470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2404 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-16 12:13:08,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97243 states.