./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro --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 ebe8677bb7c1f5255df364410243bb239a688bf1d1729cbbc508fc2f6afa38f5 --- 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-8393723 [2022-11-18 19:33:42,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:33:42,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:33:42,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:33:42,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:33:42,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:33:42,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:33:42,378 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:33:42,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:33:42,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:33:42,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:33:42,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:33:42,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:33:42,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:33:42,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:33:42,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:33:42,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:33:42,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:33:42,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:33:42,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:33:42,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:33:42,425 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:33:42,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:33:42,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:33:42,440 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:33:42,441 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:33:42,441 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:33:42,443 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:33:42,444 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:33:42,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:33:42,447 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:33:42,450 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:33:42,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:33:42,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:33:42,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:33:42,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:33:42,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:33:42,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:33:42,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:33:42,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:33:42,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:33:42,461 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 19:33:42,514 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:33:42,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:33:42,520 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:33:42,520 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:33:42,521 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:33:42,522 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:33:42,522 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:33:42,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:33:42,523 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:33:42,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:33:42,525 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:33:42,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:33:42,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:33:42,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:33:42,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:33:42,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:33:42,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:33:42,527 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:33:42,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:33:42,527 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:33:42,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:33:42,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:33:42,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:33:42,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:33:42,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:33:42,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:33:42,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:33:42,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:33:42,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:33:42,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:33:42,532 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:33:42,532 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:33:42,533 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:33:42,533 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_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebe8677bb7c1f5255df364410243bb239a688bf1d1729cbbc508fc2f6afa38f5 [2022-11-18 19:33:42,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:33:42,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:33:42,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:33:42,927 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:33:42,928 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:33:42,929 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c [2022-11-18 19:33:43,027 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/data/f6f459706/546276bae5834c3bb1c930647911b5d9/FLAGb3dbec0c5 [2022-11-18 19:33:43,749 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:33:43,753 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c [2022-11-18 19:33:43,782 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/data/f6f459706/546276bae5834c3bb1c930647911b5d9/FLAGb3dbec0c5 [2022-11-18 19:33:43,996 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/data/f6f459706/546276bae5834c3bb1c930647911b5d9 [2022-11-18 19:33:44,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:33:44,004 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:33:44,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:33:44,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:33:44,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:33:44,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:33:43" (1/1) ... [2022-11-18 19:33:44,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f909474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:44, skipping insertion in model container [2022-11-18 19:33:44,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:33:43" (1/1) ... [2022-11-18 19:33:44,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:33:44,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:33:44,316 WARN L234 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_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c[913,926] [2022-11-18 19:33:44,373 WARN L234 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_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c[5977,5990] [2022-11-18 19:33:44,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:33:44,468 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:33:44,483 WARN L234 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_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c[913,926] [2022-11-18 19:33:44,503 WARN L234 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_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c[5977,5990] [2022-11-18 19:33:44,551 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:33:44,580 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:33:44,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:44 WrapperNode [2022-11-18 19:33:44,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:33:44,584 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:33:44,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:33:44,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:33:44,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:44" (1/1) ... [2022-11-18 19:33:44,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:44" (1/1) ... [2022-11-18 19:33:44,708 INFO L138 Inliner]: procedures = 60, calls = 67, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 712 [2022-11-18 19:33:44,709 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:33:44,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:33:44,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:33:44,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:33:44,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:44" (1/1) ... [2022-11-18 19:33:44,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:44" (1/1) ... [2022-11-18 19:33:44,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:44" (1/1) ... [2022-11-18 19:33:44,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:44" (1/1) ... [2022-11-18 19:33:44,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:44" (1/1) ... [2022-11-18 19:33:44,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:44" (1/1) ... [2022-11-18 19:33:44,793 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:44" (1/1) ... [2022-11-18 19:33:44,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:44" (1/1) ... [2022-11-18 19:33:44,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:33:44,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:33:44,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:33:44,810 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:33:44,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:44" (1/1) ... [2022-11-18 19:33:44,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:33:44,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:33:44,861 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:33:44,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:33:44,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:33:44,917 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-18 19:33:44,917 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-18 19:33:44,918 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-11-18 19:33:44,918 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-11-18 19:33:44,918 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-18 19:33:44,918 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-18 19:33:44,918 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-18 19:33:44,918 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-18 19:33:44,919 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-18 19:33:44,919 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-18 19:33:44,919 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-18 19:33:44,919 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-18 19:33:44,919 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-18 19:33:44,919 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-18 19:33:44,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:33:44,920 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-18 19:33:44,920 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-18 19:33:44,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:33:44,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:33:44,920 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-18 19:33:44,920 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-18 19:33:44,921 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-18 19:33:44,921 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-18 19:33:45,101 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:33:45,103 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:33:46,163 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:33:46,177 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:33:46,177 INFO L300 CfgBuilder]: Removed 13 assume(true) statements. [2022-11-18 19:33:46,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:33:46 BoogieIcfgContainer [2022-11-18 19:33:46,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:33:46,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:33:46,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:33:46,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:33:46,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:33:43" (1/3) ... [2022-11-18 19:33:46,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4920d063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:33:46, skipping insertion in model container [2022-11-18 19:33:46,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:44" (2/3) ... [2022-11-18 19:33:46,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4920d063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:33:46, skipping insertion in model container [2022-11-18 19:33:46,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:33:46" (3/3) ... [2022-11-18 19:33:46,194 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.06.cil-1.c [2022-11-18 19:33:46,218 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:33:46,219 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-18 19:33:46,299 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:33:46,313 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;@2f2cf604, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:33:46,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 19:33:46,321 INFO L276 IsEmpty]: Start isEmpty. Operand has 312 states, 271 states have (on average 1.6236162361623616) internal successors, (440), 278 states have internal predecessors, (440), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-18 19:33:46,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-18 19:33:46,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:46,346 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] [2022-11-18 19:33:46,347 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:33:46,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:46,373 INFO L85 PathProgramCache]: Analyzing trace with hash -953270584, now seen corresponding path program 1 times [2022-11-18 19:33:46,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:46,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195913128] [2022-11-18 19:33:46,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:46,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:46,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 19:33:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:46,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-18 19:33:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:46,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:46,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:46,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195913128] [2022-11-18 19:33:46,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195913128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:46,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:46,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:33:46,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554811107] [2022-11-18 19:33:46,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:46,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:33:46,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:46,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:33:46,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:33:46,882 INFO L87 Difference]: Start difference. First operand has 312 states, 271 states have (on average 1.6236162361623616) internal successors, (440), 278 states have internal predecessors, (440), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) 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) [2022-11-18 19:33:47,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:47,756 INFO L93 Difference]: Finished difference Result 674 states and 1072 transitions. [2022-11-18 19:33:47,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:33:47,760 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 [2022-11-18 19:33:47,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:47,790 INFO L225 Difference]: With dead ends: 674 [2022-11-18 19:33:47,790 INFO L226 Difference]: Without dead ends: 371 [2022-11-18 19:33:47,801 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 [2022-11-18 19:33:47,807 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 597 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:47,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 630 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 19:33:47,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-11-18 19:33:47,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 365. [2022-11-18 19:33:47,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 320 states have (on average 1.496875) internal successors, (479), 325 states have internal predecessors, (479), 32 states have call successors, (32), 12 states have call predecessors, (32), 11 states have return successors, (34), 28 states have call predecessors, (34), 28 states have call successors, (34) [2022-11-18 19:33:47,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 545 transitions. [2022-11-18 19:33:47,940 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 545 transitions. Word has length 44 [2022-11-18 19:33:47,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:47,941 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 545 transitions. [2022-11-18 19:33:47,942 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) [2022-11-18 19:33:47,942 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 545 transitions. [2022-11-18 19:33:47,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 19:33:47,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:47,947 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] [2022-11-18 19:33:47,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:33:47,947 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:33:47,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:47,949 INFO L85 PathProgramCache]: Analyzing trace with hash 215630895, now seen corresponding path program 1 times [2022-11-18 19:33:47,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:47,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996806823] [2022-11-18 19:33:47,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:47,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:48,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 19:33:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:48,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 19:33:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:48,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:48,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996806823] [2022-11-18 19:33:48,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996806823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:48,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:48,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:33:48,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680827623] [2022-11-18 19:33:48,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:48,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:33:48,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:48,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:33:48,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:33:48,096 INFO L87 Difference]: Start difference. First operand 365 states and 545 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) [2022-11-18 19:33:48,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:48,744 INFO L93 Difference]: Finished difference Result 613 states and 885 transitions. [2022-11-18 19:33:48,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:33:48,745 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 [2022-11-18 19:33:48,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:48,753 INFO L225 Difference]: With dead ends: 613 [2022-11-18 19:33:48,754 INFO L226 Difference]: Without dead ends: 489 [2022-11-18 19:33:48,757 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 [2022-11-18 19:33:48,758 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 250 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:48,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 846 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 19:33:48,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-11-18 19:33:48,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 432. [2022-11-18 19:33:48,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 381 states have (on average 1.4776902887139107) internal successors, (563), 386 states have internal predecessors, (563), 35 states have call successors, (35), 15 states have call predecessors, (35), 14 states have return successors, (37), 31 states have call predecessors, (37), 31 states have call successors, (37) [2022-11-18 19:33:48,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 635 transitions. [2022-11-18 19:33:48,853 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 635 transitions. Word has length 45 [2022-11-18 19:33:48,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:48,854 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 635 transitions. [2022-11-18 19:33:48,854 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) [2022-11-18 19:33:48,854 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 635 transitions. [2022-11-18 19:33:48,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 19:33:48,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:48,868 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] [2022-11-18 19:33:48,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 19:33:48,869 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:33:48,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:48,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1068726566, now seen corresponding path program 1 times [2022-11-18 19:33:48,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:48,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880463490] [2022-11-18 19:33:48,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:48,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:49,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 19:33:49,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:49,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 19:33:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:49,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:49,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880463490] [2022-11-18 19:33:49,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880463490] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:49,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:49,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:33:49,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606818271] [2022-11-18 19:33:49,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:49,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:33:49,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:49,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:33:49,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:33:49,067 INFO L87 Difference]: Start difference. First operand 432 states and 635 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) [2022-11-18 19:33:49,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:49,580 INFO L93 Difference]: Finished difference Result 840 states and 1194 transitions. [2022-11-18 19:33:49,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:33:49,581 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 [2022-11-18 19:33:49,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:49,585 INFO L225 Difference]: With dead ends: 840 [2022-11-18 19:33:49,586 INFO L226 Difference]: Without dead ends: 649 [2022-11-18 19:33:49,587 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 [2022-11-18 19:33:49,589 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 606 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:49,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 628 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 19:33:49,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-11-18 19:33:49,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 597. [2022-11-18 19:33:49,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 527 states have (on average 1.4288425047438331) internal successors, (753), 535 states have internal predecessors, (753), 46 states have call successors, (46), 22 states have call predecessors, (46), 22 states have return successors, (54), 40 states have call predecessors, (54), 42 states have call successors, (54) [2022-11-18 19:33:49,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 853 transitions. [2022-11-18 19:33:49,646 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 853 transitions. Word has length 45 [2022-11-18 19:33:49,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:49,647 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 853 transitions. [2022-11-18 19:33:49,647 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) [2022-11-18 19:33:49,647 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 853 transitions. [2022-11-18 19:33:49,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-18 19:33:49,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:49,650 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] [2022-11-18 19:33:49,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 19:33:49,650 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:33:49,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:49,651 INFO L85 PathProgramCache]: Analyzing trace with hash -642295496, now seen corresponding path program 1 times [2022-11-18 19:33:49,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:49,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986342108] [2022-11-18 19:33:49,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:49,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:49,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 19:33:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:49,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 19:33:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:49,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-18 19:33:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 19:33:49,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:49,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986342108] [2022-11-18 19:33:49,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986342108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:49,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:49,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:33:49,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973971166] [2022-11-18 19:33:49,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:49,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:33:49,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:49,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:33:49,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:33:49,759 INFO L87 Difference]: Start difference. First operand 597 states and 853 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) [2022-11-18 19:33:50,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:50,329 INFO L93 Difference]: Finished difference Result 1181 states and 1638 transitions. [2022-11-18 19:33:50,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:33:50,330 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 [2022-11-18 19:33:50,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:50,335 INFO L225 Difference]: With dead ends: 1181 [2022-11-18 19:33:50,335 INFO L226 Difference]: Without dead ends: 825 [2022-11-18 19:33:50,337 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 [2022-11-18 19:33:50,338 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 234 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:50,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 898 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 19:33:50,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-11-18 19:33:50,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 787. [2022-11-18 19:33:50,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 693 states have (on average 1.3751803751803753) internal successors, (953), 703 states have internal predecessors, (953), 60 states have call successors, (60), 30 states have call predecessors, (60), 32 states have return successors, (78), 54 states have call predecessors, (78), 56 states have call successors, (78) [2022-11-18 19:33:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1091 transitions. [2022-11-18 19:33:50,409 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1091 transitions. Word has length 62 [2022-11-18 19:33:50,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:50,410 INFO L495 AbstractCegarLoop]: Abstraction has 787 states and 1091 transitions. [2022-11-18 19:33:50,410 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) [2022-11-18 19:33:50,410 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1091 transitions. [2022-11-18 19:33:50,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-18 19:33:50,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:50,413 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] [2022-11-18 19:33:50,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 19:33:50,414 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:33:50,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:50,415 INFO L85 PathProgramCache]: Analyzing trace with hash -897620696, now seen corresponding path program 1 times [2022-11-18 19:33:50,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:50,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803275079] [2022-11-18 19:33:50,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:50,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:50,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 19:33:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:50,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 19:33:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:50,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-18 19:33:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 19:33:50,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:50,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803275079] [2022-11-18 19:33:50,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803275079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:50,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:50,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:33:50,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024984906] [2022-11-18 19:33:50,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:50,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:33:50,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:50,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:33:50,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:33:50,539 INFO L87 Difference]: Start difference. First operand 787 states and 1091 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) [2022-11-18 19:33:51,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:51,058 INFO L93 Difference]: Finished difference Result 1440 states and 1944 transitions. [2022-11-18 19:33:51,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:33:51,059 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 [2022-11-18 19:33:51,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:51,077 INFO L225 Difference]: With dead ends: 1440 [2022-11-18 19:33:51,077 INFO L226 Difference]: Without dead ends: 986 [2022-11-18 19:33:51,079 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 [2022-11-18 19:33:51,080 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 593 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:51,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 626 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 19:33:51,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2022-11-18 19:33:51,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 931. [2022-11-18 19:33:51,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 821 states have (on average 1.3447015834348355) internal successors, (1104), 833 states have internal predecessors, (1104), 68 states have call successors, (68), 36 states have call predecessors, (68), 40 states have return successors, (92), 62 states have call predecessors, (92), 64 states have call successors, (92) [2022-11-18 19:33:51,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1264 transitions. [2022-11-18 19:33:51,166 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1264 transitions. Word has length 67 [2022-11-18 19:33:51,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:51,166 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 1264 transitions. [2022-11-18 19:33:51,167 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) [2022-11-18 19:33:51,167 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1264 transitions. [2022-11-18 19:33:51,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 19:33:51,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:51,170 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] [2022-11-18 19:33:51,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 19:33:51,171 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:33:51,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:51,172 INFO L85 PathProgramCache]: Analyzing trace with hash -252493793, now seen corresponding path program 1 times [2022-11-18 19:33:51,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:51,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120855142] [2022-11-18 19:33:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:51,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:51,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 19:33:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:51,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-18 19:33:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:51,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 19:33:51,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:51,381 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:33:51,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:51,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120855142] [2022-11-18 19:33:51,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120855142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:33:51,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009040521] [2022-11-18 19:33:51,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:51,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:33:51,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:33:51,392 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:33:51,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:33:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:51,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 19:33:51,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:51,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:33:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 19:33:51,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009040521] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 19:33:51,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:33:51,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-11-18 19:33:51,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278102499] [2022-11-18 19:33:51,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:51,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:33:51,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:51,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:33:51,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:33:51,861 INFO L87 Difference]: Start difference. First operand 931 states and 1264 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) [2022-11-18 19:33:52,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:52,139 INFO L93 Difference]: Finished difference Result 987 states and 1332 transitions. [2022-11-18 19:33:52,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:33:52,140 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 [2022-11-18 19:33:52,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:52,147 INFO L225 Difference]: With dead ends: 987 [2022-11-18 19:33:52,147 INFO L226 Difference]: Without dead ends: 984 [2022-11-18 19:33:52,149 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 [2022-11-18 19:33:52,159 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 811 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:52,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [811 Valid, 546 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:33:52,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-11-18 19:33:52,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 930. [2022-11-18 19:33:52,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 821 states have (on average 1.3422655298416566) internal successors, (1102), 832 states have internal predecessors, (1102), 67 states have call successors, (67), 36 states have call predecessors, (67), 40 states have return successors, (92), 62 states have call predecessors, (92), 64 states have call successors, (92) [2022-11-18 19:33:52,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1261 transitions. [2022-11-18 19:33:52,265 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1261 transitions. Word has length 68 [2022-11-18 19:33:52,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:52,268 INFO L495 AbstractCegarLoop]: Abstraction has 930 states and 1261 transitions. [2022-11-18 19:33:52,268 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) [2022-11-18 19:33:52,268 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1261 transitions. [2022-11-18 19:33:52,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 19:33:52,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:52,271 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] [2022-11-18 19:33:52,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:52,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 19:33:52,479 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:33:52,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:52,480 INFO L85 PathProgramCache]: Analyzing trace with hash 761646347, now seen corresponding path program 1 times [2022-11-18 19:33:52,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:52,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731029955] [2022-11-18 19:33:52,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:52,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:52,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 19:33:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:52,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-18 19:33:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:52,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 19:33:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:52,688 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:33:52,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:52,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731029955] [2022-11-18 19:33:52,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731029955] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:33:52,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218412772] [2022-11-18 19:33:52,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:52,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:33:52,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:33:52,704 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:33:52,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:33:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:52,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 19:33:52,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:53,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:33:53,417 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 19:33:53,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218412772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:33:53,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:33:53,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-11-18 19:33:53,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276179400] [2022-11-18 19:33:53,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:33:53,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 19:33:53,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:53,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 19:33:53,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:33:53,423 INFO L87 Difference]: Start difference. First operand 930 states and 1261 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) [2022-11-18 19:33:55,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:55,503 INFO L93 Difference]: Finished difference Result 2630 states and 3481 transitions. [2022-11-18 19:33:55,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-18 19:33:55,504 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 [2022-11-18 19:33:55,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:55,515 INFO L225 Difference]: With dead ends: 2630 [2022-11-18 19:33:55,515 INFO L226 Difference]: Without dead ends: 2086 [2022-11-18 19:33:55,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 19:33:55,521 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 1343 mSDsluCounter, 2186 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1370 SdHoareTripleChecker+Valid, 2597 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:55,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1370 Valid, 2597 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 19:33:55,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2022-11-18 19:33:55,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1319. [2022-11-18 19:33:55,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1171 states have (on average 1.3116994022203246) internal successors, (1536), 1190 states have internal predecessors, (1536), 87 states have call successors, (87), 50 states have call predecessors, (87), 59 states have return successors, (126), 79 states have call predecessors, (126), 84 states have call successors, (126) [2022-11-18 19:33:55,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 1749 transitions. [2022-11-18 19:33:55,695 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 1749 transitions. Word has length 69 [2022-11-18 19:33:55,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:55,695 INFO L495 AbstractCegarLoop]: Abstraction has 1319 states and 1749 transitions. [2022-11-18 19:33:55,696 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) [2022-11-18 19:33:55,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 1749 transitions. [2022-11-18 19:33:55,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-18 19:33:55,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:55,700 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] [2022-11-18 19:33:55,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:55,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:33:55,908 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:33:55,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:55,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1915961298, now seen corresponding path program 1 times [2022-11-18 19:33:55,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:55,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695113761] [2022-11-18 19:33:55,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:55,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:55,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 19:33:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:55,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-18 19:33:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:55,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-18 19:33:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:55,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-18 19:33:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 19:33:56,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:56,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695113761] [2022-11-18 19:33:56,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695113761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:56,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:56,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:33:56,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597071347] [2022-11-18 19:33:56,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:56,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:33:56,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:56,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:33:56,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:33:56,008 INFO L87 Difference]: Start difference. First operand 1319 states and 1749 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 19:33:56,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:56,601 INFO L93 Difference]: Finished difference Result 2084 states and 2736 transitions. [2022-11-18 19:33:56,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:33:56,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2022-11-18 19:33:56,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:56,608 INFO L225 Difference]: With dead ends: 2084 [2022-11-18 19:33:56,608 INFO L226 Difference]: Without dead ends: 1239 [2022-11-18 19:33:56,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:56,611 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 608 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:56,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [629 Valid, 640 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 19:33:56,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2022-11-18 19:33:56,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1182. [2022-11-18 19:33:56,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1050 states have (on average 1.3123809523809524) internal successors, (1378), 1068 states have internal predecessors, (1378), 79 states have call successors, (79), 44 states have call predecessors, (79), 51 states have return successors, (112), 70 states have call predecessors, (112), 76 states have call successors, (112) [2022-11-18 19:33:56,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1569 transitions. [2022-11-18 19:33:56,745 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1569 transitions. Word has length 88 [2022-11-18 19:33:56,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:56,745 INFO L495 AbstractCegarLoop]: Abstraction has 1182 states and 1569 transitions. [2022-11-18 19:33:56,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 19:33:56,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1569 transitions. [2022-11-18 19:33:56,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-18 19:33:56,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:56,750 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] [2022-11-18 19:33:56,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 19:33:56,751 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:33:56,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:56,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1247723609, now seen corresponding path program 1 times [2022-11-18 19:33:56,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:56,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769747600] [2022-11-18 19:33:56,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:56,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:56,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:56,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 19:33:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:56,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-18 19:33:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:56,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 19:33:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:56,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-18 19:33:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:56,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-18 19:33:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-18 19:33:56,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:56,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769747600] [2022-11-18 19:33:56,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769747600] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:33:56,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144353377] [2022-11-18 19:33:56,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:56,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:33:56,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:33:56,885 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:33:56,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:33:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:57,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 19:33:57,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:57,091 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 19:33:57,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:57,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144353377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:57,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:33:57,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-18 19:33:57,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6966397] [2022-11-18 19:33:57,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:57,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:33:57,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:57,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:33:57,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:57,094 INFO L87 Difference]: Start difference. First operand 1182 states and 1569 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) [2022-11-18 19:33:57,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:57,245 INFO L93 Difference]: Finished difference Result 1561 states and 2037 transitions. [2022-11-18 19:33:57,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:33:57,246 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 [2022-11-18 19:33:57,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:57,248 INFO L225 Difference]: With dead ends: 1561 [2022-11-18 19:33:57,248 INFO L226 Difference]: Without dead ends: 235 [2022-11-18 19:33:57,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:57,254 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 62 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 928 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 [2022-11-18 19:33:57,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 928 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:33:57,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-18 19:33:57,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2022-11-18 19:33:57,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 206 states have (on average 1.5533980582524272) internal successors, (320), 208 states have internal predecessors, (320), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-18 19:33:57,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 362 transitions. [2022-11-18 19:33:57,286 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 362 transitions. Word has length 103 [2022-11-18 19:33:57,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:57,287 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 362 transitions. [2022-11-18 19:33:57,287 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) [2022-11-18 19:33:57,287 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 362 transitions. [2022-11-18 19:33:57,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-18 19:33:57,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:57,289 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] [2022-11-18 19:33:57,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:57,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c9ef201-9926-45cb-a7f2-41a6c2c16a10/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 19:33:57,497 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:33:57,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:57,498 INFO L85 PathProgramCache]: Analyzing trace with hash 490472779, now seen corresponding path program 1 times [2022-11-18 19:33:57,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:57,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60141266] [2022-11-18 19:33:57,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:57,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:57,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 19:33:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:57,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 19:33:57,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:57,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 19:33:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:57,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 19:33:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:57,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 19:33:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:57,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:57,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60141266] [2022-11-18 19:33:57,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60141266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:57,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:57,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:33:57,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95529376] [2022-11-18 19:33:57,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:57,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:57,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:57,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:57,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:57,689 INFO L87 Difference]: Start difference. First operand 235 states and 362 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 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) [2022-11-18 19:33:59,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:59,080 INFO L93 Difference]: Finished difference Result 536 states and 840 transitions. [2022-11-18 19:33:59,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:59,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 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 113 [2022-11-18 19:33:59,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:59,084 INFO L225 Difference]: With dead ends: 536 [2022-11-18 19:33:59,084 INFO L226 Difference]: Without dead ends: 311 [2022-11-18 19:33:59,085 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 [2022-11-18 19:33:59,086 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 595 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:59,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 477 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-18 19:33:59,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-18 19:33:59,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 235. [2022-11-18 19:33:59,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 206 states have (on average 1.5485436893203883) internal successors, (319), 208 states have internal predecessors, (319), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-18 19:33:59,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 361 transitions. [2022-11-18 19:33:59,132 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 361 transitions. Word has length 113 [2022-11-18 19:33:59,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:59,133 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 361 transitions. [2022-11-18 19:33:59,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 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) [2022-11-18 19:33:59,133 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 361 transitions. [2022-11-18 19:33:59,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-18 19:33:59,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:59,135 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] [2022-11-18 19:33:59,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 19:33:59,136 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:33:59,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:59,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1937785843, now seen corresponding path program 1 times [2022-11-18 19:33:59,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:59,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110235877] [2022-11-18 19:33:59,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:59,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:59,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 19:33:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:59,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 19:33:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:59,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 19:33:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:59,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 19:33:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:59,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 19:33:59,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:59,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:59,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110235877] [2022-11-18 19:33:59,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110235877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:59,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:59,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 19:33:59,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104325356] [2022-11-18 19:33:59,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:59,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:33:59,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:59,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:33:59,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:59,365 INFO L87 Difference]: Start difference. First operand 235 states and 361 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 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) [2022-11-18 19:34:01,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:01,928 INFO L93 Difference]: Finished difference Result 833 states and 1312 transitions. [2022-11-18 19:34:01,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 19:34:01,929 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 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 113 [2022-11-18 19:34:01,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:01,934 INFO L225 Difference]: With dead ends: 833 [2022-11-18 19:34:01,935 INFO L226 Difference]: Without dead ends: 613 [2022-11-18 19:34:01,936 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 [2022-11-18 19:34:01,937 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 887 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:01,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [900 Valid, 835 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1336 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-18 19:34:01,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-11-18 19:34:02,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 460. [2022-11-18 19:34:02,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 409 states have (on average 1.5623471882640587) internal successors, (639), 412 states have internal predecessors, (639), 37 states have call successors, (37), 13 states have call predecessors, (37), 13 states have return successors, (38), 35 states have call predecessors, (38), 35 states have call successors, (38) [2022-11-18 19:34:02,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 714 transitions. [2022-11-18 19:34:02,029 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 714 transitions. Word has length 113 [2022-11-18 19:34:02,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:02,030 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 714 transitions. [2022-11-18 19:34:02,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 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) [2022-11-18 19:34:02,030 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 714 transitions. [2022-11-18 19:34:02,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-18 19:34:02,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:02,032 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] [2022-11-18 19:34:02,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 19:34:02,032 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:34:02,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:02,033 INFO L85 PathProgramCache]: Analyzing trace with hash -943533047, now seen corresponding path program 1 times [2022-11-18 19:34:02,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:34:02,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922431277] [2022-11-18 19:34:02,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:02,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:34:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:02,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 19:34:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:02,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 19:34:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:02,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 19:34:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:02,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 19:34:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:02,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 19:34:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:02,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:34:02,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922431277] [2022-11-18 19:34:02,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922431277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:02,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:02,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 19:34:02,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042775051] [2022-11-18 19:34:02,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:02,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:34:02,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:34:02,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:34:02,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:34:02,270 INFO L87 Difference]: Start difference. First operand 460 states and 714 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2022-11-18 19:34:05,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:05,441 INFO L93 Difference]: Finished difference Result 1366 states and 2152 transitions. [2022-11-18 19:34:05,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:34:05,442 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2022-11-18 19:34:05,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:05,448 INFO L225 Difference]: With dead ends: 1366 [2022-11-18 19:34:05,448 INFO L226 Difference]: Without dead ends: 921 [2022-11-18 19:34:05,450 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 [2022-11-18 19:34:05,451 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 896 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 2020 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 2075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:05,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 1549 Invalid, 2075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2020 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-18 19:34:05,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-11-18 19:34:05,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 670. [2022-11-18 19:34:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 597 states have (on average 1.5561139028475712) internal successors, (929), 601 states have internal predecessors, (929), 52 states have call successors, (52), 19 states have call predecessors, (52), 20 states have return successors, (55), 51 states have call predecessors, (55), 50 states have call successors, (55) [2022-11-18 19:34:05,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1036 transitions. [2022-11-18 19:34:05,553 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1036 transitions. Word has length 113 [2022-11-18 19:34:05,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:05,554 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 1036 transitions. [2022-11-18 19:34:05,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2022-11-18 19:34:05,554 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1036 transitions. [2022-11-18 19:34:05,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-18 19:34:05,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:05,556 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] [2022-11-18 19:34:05,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 19:34:05,557 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:34:05,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:05,558 INFO L85 PathProgramCache]: Analyzing trace with hash 407852171, now seen corresponding path program 1 times [2022-11-18 19:34:05,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:34:05,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030471459] [2022-11-18 19:34:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:05,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:34:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:05,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 19:34:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:05,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 19:34:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:05,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 19:34:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:05,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 19:34:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:05,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 19:34:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:05,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:05,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:34:05,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030471459] [2022-11-18 19:34:05,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030471459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:05,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:05,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 19:34:05,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719931330] [2022-11-18 19:34:05,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:05,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:34:05,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:34:05,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:34:05,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:34:05,828 INFO L87 Difference]: Start difference. First operand 670 states and 1036 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2022-11-18 19:34:08,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:08,861 INFO L93 Difference]: Finished difference Result 2151 states and 3382 transitions. [2022-11-18 19:34:08,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:34:08,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2022-11-18 19:34:08,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:08,872 INFO L225 Difference]: With dead ends: 2151 [2022-11-18 19:34:08,872 INFO L226 Difference]: Without dead ends: 1496 [2022-11-18 19:34:08,876 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 [2022-11-18 19:34:08,877 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 962 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:08,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [975 Valid, 1026 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1788 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-18 19:34:08,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2022-11-18 19:34:09,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1091. [2022-11-18 19:34:09,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 974 states have (on average 1.5503080082135523) internal successors, (1510), 980 states have internal predecessors, (1510), 82 states have call successors, (82), 31 states have call predecessors, (82), 34 states have return successors, (93), 83 states have call predecessors, (93), 80 states have call successors, (93) [2022-11-18 19:34:09,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1685 transitions. [2022-11-18 19:34:09,047 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1685 transitions. Word has length 113 [2022-11-18 19:34:09,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:09,048 INFO L495 AbstractCegarLoop]: Abstraction has 1091 states and 1685 transitions. [2022-11-18 19:34:09,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2022-11-18 19:34:09,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1685 transitions. [2022-11-18 19:34:09,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-18 19:34:09,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:09,051 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] [2022-11-18 19:34:09,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 19:34:09,052 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:34:09,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:09,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1211122743, now seen corresponding path program 1 times [2022-11-18 19:34:09,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:34:09,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448328578] [2022-11-18 19:34:09,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:09,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:34:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:09,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 19:34:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:09,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 19:34:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:09,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 19:34:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:09,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 19:34:09,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:09,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 19:34:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:09,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:34:09,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448328578] [2022-11-18 19:34:09,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448328578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:09,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:09,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 19:34:09,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66282160] [2022-11-18 19:34:09,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:09,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:34:09,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:34:09,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:34:09,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:34:09,309 INFO L87 Difference]: Start difference. First operand 1091 states and 1685 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2022-11-18 19:34:12,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:12,644 INFO L93 Difference]: Finished difference Result 3664 states and 5743 transitions. [2022-11-18 19:34:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:34:12,645 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2022-11-18 19:34:12,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:12,662 INFO L225 Difference]: With dead ends: 3664 [2022-11-18 19:34:12,662 INFO L226 Difference]: Without dead ends: 2588 [2022-11-18 19:34:12,667 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 [2022-11-18 19:34:12,668 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 894 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 2009 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 2066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:12,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 1547 Invalid, 2066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2009 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-18 19:34:12,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2022-11-18 19:34:13,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1934. [2022-11-18 19:34:13,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1729 states have (on average 1.545401966454598) internal successors, (2672), 1739 states have internal predecessors, (2672), 142 states have call successors, (142), 55 states have call predecessors, (142), 62 states have return successors, (175), 147 states have call predecessors, (175), 140 states have call successors, (175) [2022-11-18 19:34:13,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 2989 transitions. [2022-11-18 19:34:13,019 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 2989 transitions. Word has length 113 [2022-11-18 19:34:13,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:13,019 INFO L495 AbstractCegarLoop]: Abstraction has 1934 states and 2989 transitions. [2022-11-18 19:34:13,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2022-11-18 19:34:13,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 2989 transitions. [2022-11-18 19:34:13,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-18 19:34:13,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:13,023 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] [2022-11-18 19:34:13,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 19:34:13,024 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:34:13,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:13,024 INFO L85 PathProgramCache]: Analyzing trace with hash -2094631733, now seen corresponding path program 1 times [2022-11-18 19:34:13,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:34:13,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577303143] [2022-11-18 19:34:13,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:13,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:34:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:13,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 19:34:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:13,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 19:34:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:13,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 19:34:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:13,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 19:34:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:13,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 19:34:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:13,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:34:13,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577303143] [2022-11-18 19:34:13,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577303143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:13,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:13,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 19:34:13,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563313712] [2022-11-18 19:34:13,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:13,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:34:13,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:34:13,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:34:13,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:34:13,278 INFO L87 Difference]: Start difference. First operand 1934 states and 2989 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2022-11-18 19:34:16,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:16,811 INFO L93 Difference]: Finished difference Result 6682 states and 10469 transitions. [2022-11-18 19:34:16,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:34:16,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2022-11-18 19:34:16,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:16,840 INFO L225 Difference]: With dead ends: 6682 [2022-11-18 19:34:16,841 INFO L226 Difference]: Without dead ends: 4763 [2022-11-18 19:34:16,849 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 [2022-11-18 19:34:16,850 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 890 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 1981 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:16,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [903 Valid, 1547 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1981 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-18 19:34:16,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4763 states. [2022-11-18 19:34:17,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4763 to 3634. [2022-11-18 19:34:17,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3253 states have (on average 1.5431909007070397) internal successors, (5020), 3271 states have internal predecessors, (5020), 262 states have call successors, (262), 103 states have call predecessors, (262), 118 states have return successors, (357), 275 states have call predecessors, (357), 260 states have call successors, (357) [2022-11-18 19:34:17,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 5639 transitions. [2022-11-18 19:34:17,503 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 5639 transitions. Word has length 113 [2022-11-18 19:34:17,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:17,503 INFO L495 AbstractCegarLoop]: Abstraction has 3634 states and 5639 transitions. [2022-11-18 19:34:17,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2022-11-18 19:34:17,504 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 5639 transitions. [2022-11-18 19:34:17,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-18 19:34:17,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:17,508 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] [2022-11-18 19:34:17,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 19:34:17,509 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:34:17,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:17,510 INFO L85 PathProgramCache]: Analyzing trace with hash 259753549, now seen corresponding path program 1 times [2022-11-18 19:34:17,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:34:17,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589296429] [2022-11-18 19:34:17,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:17,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:34:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:17,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 19:34:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:17,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 19:34:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:17,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 19:34:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:17,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 19:34:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:17,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 19:34:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:17,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:34:17,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589296429] [2022-11-18 19:34:17,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589296429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:17,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:17,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 19:34:17,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215339443] [2022-11-18 19:34:17,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:17,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:34:17,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:34:17,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:34:17,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:34:17,742 INFO L87 Difference]: Start difference. First operand 3634 states and 5639 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2022-11-18 19:34:21,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:21,843 INFO L93 Difference]: Finished difference Result 12736 states and 20013 transitions. [2022-11-18 19:34:21,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:34:21,844 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2022-11-18 19:34:21,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:21,900 INFO L225 Difference]: With dead ends: 12736 [2022-11-18 19:34:21,901 INFO L226 Difference]: Without dead ends: 9117 [2022-11-18 19:34:21,917 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 [2022-11-18 19:34:21,918 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 889 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 1968 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:21,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [902 Valid, 1547 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1968 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-18 19:34:21,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9117 states. [2022-11-18 19:34:23,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9117 to 7047. [2022-11-18 19:34:23,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 6314 states have (on average 1.5416534684827368) internal successors, (9734), 6348 states have internal predecessors, (9734), 502 states have call successors, (502), 199 states have call predecessors, (502), 230 states have return successors, (775), 531 states have call predecessors, (775), 500 states have call successors, (775) [2022-11-18 19:34:23,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 11011 transitions. [2022-11-18 19:34:23,182 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 11011 transitions. Word has length 113 [2022-11-18 19:34:23,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:23,183 INFO L495 AbstractCegarLoop]: Abstraction has 7047 states and 11011 transitions. [2022-11-18 19:34:23,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2022-11-18 19:34:23,184 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 11011 transitions. [2022-11-18 19:34:23,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-18 19:34:23,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:23,191 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] [2022-11-18 19:34:23,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 19:34:23,192 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:34:23,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:23,193 INFO L85 PathProgramCache]: Analyzing trace with hash 2136816779, now seen corresponding path program 1 times [2022-11-18 19:34:23,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:34:23,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653551057] [2022-11-18 19:34:23,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:23,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:34:23,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:23,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 19:34:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:23,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 19:34:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:23,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 19:34:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:23,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 19:34:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:23,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 19:34:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:23,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:34:23,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653551057] [2022-11-18 19:34:23,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653551057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:23,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:23,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 19:34:23,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078288704] [2022-11-18 19:34:23,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:23,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:34:23,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:34:23,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:34:23,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:34:23,421 INFO L87 Difference]: Start difference. First operand 7047 states and 11011 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2022-11-18 19:34:29,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:29,506 INFO L93 Difference]: Finished difference Result 27819 states and 43773 transitions. [2022-11-18 19:34:29,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 19:34:29,507 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2022-11-18 19:34:29,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:29,613 INFO L225 Difference]: With dead ends: 27819 [2022-11-18 19:34:29,614 INFO L226 Difference]: Without dead ends: 20787 [2022-11-18 19:34:29,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:34:29,647 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1140 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1160 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 2010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:29,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1160 Valid, 1537 Invalid, 2010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-18 19:34:29,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20787 states. [2022-11-18 19:34:32,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20787 to 13808. [2022-11-18 19:34:32,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13808 states, 12403 states have (on average 1.54349754091752) internal successors, (19144), 12469 states have internal predecessors, (19144), 950 states have call successors, (950), 391 states have call predecessors, (950), 454 states have return successors, (1741), 1011 states have call predecessors, (1741), 948 states have call successors, (1741) [2022-11-18 19:34:32,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13808 states to 13808 states and 21835 transitions. [2022-11-18 19:34:32,130 INFO L78 Accepts]: Start accepts. Automaton has 13808 states and 21835 transitions. Word has length 113 [2022-11-18 19:34:32,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:32,131 INFO L495 AbstractCegarLoop]: Abstraction has 13808 states and 21835 transitions. [2022-11-18 19:34:32,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2022-11-18 19:34:32,133 INFO L276 IsEmpty]: Start isEmpty. Operand 13808 states and 21835 transitions. [2022-11-18 19:34:32,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-18 19:34:32,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:32,147 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] [2022-11-18 19:34:32,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-18 19:34:32,147 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:34:32,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:32,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1366083213, now seen corresponding path program 1 times [2022-11-18 19:34:32,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:34:32,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410196510] [2022-11-18 19:34:32,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:32,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:34:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:32,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 19:34:32,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:32,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 19:34:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:32,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 19:34:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:32,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 19:34:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:32,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 19:34:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:32,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:34:32,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410196510] [2022-11-18 19:34:32,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410196510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:32,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:32,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 19:34:32,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733536486] [2022-11-18 19:34:32,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:32,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:34:32,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:34:32,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:34:32,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:34:32,371 INFO L87 Difference]: Start difference. First operand 13808 states and 21835 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2022-11-18 19:34:42,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:42,354 INFO L93 Difference]: Finished difference Result 53954 states and 85811 transitions. [2022-11-18 19:34:42,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 19:34:42,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2022-11-18 19:34:42,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:42,560 INFO L225 Difference]: With dead ends: 53954 [2022-11-18 19:34:42,560 INFO L226 Difference]: Without dead ends: 40161 [2022-11-18 19:34:42,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:34:42,633 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 939 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 1533 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:42,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [951 Valid, 1533 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2305 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-18 19:34:42,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40161 states. [2022-11-18 19:34:46,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40161 to 26657. [2022-11-18 19:34:46,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26657 states, 23940 states have (on average 1.5389306599832915) internal successors, (36842), 24070 states have internal predecessors, (36842), 1814 states have call successors, (1814), 775 states have call predecessors, (1814), 902 states have return successors, (4127), 1939 states have call predecessors, (4127), 1812 states have call successors, (4127) [2022-11-18 19:34:47,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26657 states to 26657 states and 42783 transitions. [2022-11-18 19:34:47,061 INFO L78 Accepts]: Start accepts. Automaton has 26657 states and 42783 transitions. Word has length 113 [2022-11-18 19:34:47,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:47,064 INFO L495 AbstractCegarLoop]: Abstraction has 26657 states and 42783 transitions. [2022-11-18 19:34:47,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2022-11-18 19:34:47,065 INFO L276 IsEmpty]: Start isEmpty. Operand 26657 states and 42783 transitions. [2022-11-18 19:34:47,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-18 19:34:47,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:47,088 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] [2022-11-18 19:34:47,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-18 19:34:47,089 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:34:47,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:47,089 INFO L85 PathProgramCache]: Analyzing trace with hash 371389515, now seen corresponding path program 1 times [2022-11-18 19:34:47,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:34:47,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063988218] [2022-11-18 19:34:47,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:47,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:34:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:47,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 19:34:47,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:47,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 19:34:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:47,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 19:34:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:47,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 19:34:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:47,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 19:34:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:47,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:47,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:34:47,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063988218] [2022-11-18 19:34:47,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063988218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:47,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:47,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 19:34:47,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017842635] [2022-11-18 19:34:47,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:47,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:34:47,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:34:47,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:34:47,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:34:47,296 INFO L87 Difference]: Start difference. First operand 26657 states and 42783 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2022-11-18 19:35:04,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:35:04,266 INFO L93 Difference]: Finished difference Result 103121 states and 166425 transitions. [2022-11-18 19:35:04,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 19:35:04,267 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2022-11-18 19:35:04,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:35:04,660 INFO L225 Difference]: With dead ends: 103121 [2022-11-18 19:35:04,661 INFO L226 Difference]: Without dead ends: 76479 [2022-11-18 19:35:04,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:35:04,782 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1060 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 1922 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:35:04,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 1537 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1922 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-18 19:35:04,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76479 states. [2022-11-18 19:35:13,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76479 to 52930. [2022-11-18 19:35:13,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52930 states, 47653 states have (on average 1.5413929868004113) internal successors, (73452), 47911 states have internal predecessors, (73452), 3478 states have call successors, (3478), 1543 states have call predecessors, (3478), 1798 states have return successors, (10293), 3731 states have call predecessors, (10293), 3476 states have call successors, (10293) [2022-11-18 19:35:13,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52930 states to 52930 states and 87223 transitions. [2022-11-18 19:35:13,886 INFO L78 Accepts]: Start accepts. Automaton has 52930 states and 87223 transitions. Word has length 113 [2022-11-18 19:35:13,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:35:13,886 INFO L495 AbstractCegarLoop]: Abstraction has 52930 states and 87223 transitions. [2022-11-18 19:35:13,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2022-11-18 19:35:13,887 INFO L276 IsEmpty]: Start isEmpty. Operand 52930 states and 87223 transitions.