./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc --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 c775d42bfad3c45ab40b07224c097c48233d7fc79c2c6639ab29adb0162bc4be --- 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-5e519f3 [2022-11-02 21:06:04,198 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:06:04,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:06:04,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:06:04,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:06:04,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:06:04,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:06:04,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:06:04,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:06:04,278 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:06:04,279 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:06:04,280 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:06:04,281 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:06:04,283 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:06:04,284 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:06:04,286 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:06:04,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:06:04,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:06:04,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:06:04,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:06:04,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:06:04,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:06:04,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:06:04,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:06:04,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:06:04,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:06:04,301 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:06:04,302 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:06:04,302 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:06:04,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:06:04,304 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:06:04,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:06:04,305 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:06:04,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:06:04,307 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:06:04,307 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:06:04,308 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:06:04,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:06:04,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:06:04,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:06:04,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:06:04,312 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:06:04,350 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:06:04,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:06:04,351 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:06:04,352 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:06:04,353 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:06:04,354 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:06:04,356 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:06:04,356 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:06:04,356 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:06:04,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:06:04,358 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:06:04,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:06:04,358 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:06:04,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:06:04,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:06:04,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:06:04,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:06:04,359 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:06:04,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:06:04,360 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:06:04,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:06:04,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:06:04,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:06:04,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:06:04,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:06:04,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:06:04,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:06:04,362 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:06:04,363 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:06:04,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:06:04,363 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:06:04,363 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:06:04,364 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:06:04,364 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_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c775d42bfad3c45ab40b07224c097c48233d7fc79c2c6639ab29adb0162bc4be [2022-11-02 21:06:04,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:06:04,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:06:04,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:06:04,741 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:06:04,741 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:06:04,743 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c [2022-11-02 21:06:04,815 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/data/5a80efeef/35733a9d89f145f6bab5c6b6c3593d95/FLAG3d66de6be [2022-11-02 21:06:05,281 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:06:05,281 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c [2022-11-02 21:06:05,294 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/data/5a80efeef/35733a9d89f145f6bab5c6b6c3593d95/FLAG3d66de6be [2022-11-02 21:06:05,642 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/data/5a80efeef/35733a9d89f145f6bab5c6b6c3593d95 [2022-11-02 21:06:05,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:06:05,646 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:06:05,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:06:05,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:06:05,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:06:05,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:06:05" (1/1) ... [2022-11-02 21:06:05,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f326ef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:05, skipping insertion in model container [2022-11-02 21:06:05,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:06:05" (1/1) ... [2022-11-02 21:06:05,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:06:05,708 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:06:05,895 WARN L230 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_7f9fcddb-75ff-4c09-b27c-717ede896722/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c[913,926] [2022-11-02 21:06:05,941 WARN L230 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_7f9fcddb-75ff-4c09-b27c-717ede896722/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c[5977,5990] [2022-11-02 21:06:05,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:06:06,001 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:06:06,012 WARN L230 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_7f9fcddb-75ff-4c09-b27c-717ede896722/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c[913,926] [2022-11-02 21:06:06,028 WARN L230 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_7f9fcddb-75ff-4c09-b27c-717ede896722/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c[5977,5990] [2022-11-02 21:06:06,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:06:06,078 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:06:06,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:06 WrapperNode [2022-11-02 21:06:06,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:06:06,079 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:06:06,080 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:06:06,080 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:06:06,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:06" (1/1) ... [2022-11-02 21:06:06,098 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:06" (1/1) ... [2022-11-02 21:06:06,144 INFO L138 Inliner]: procedures = 56, calls = 61, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 596 [2022-11-02 21:06:06,144 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:06:06,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:06:06,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:06:06,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:06:06,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:06" (1/1) ... [2022-11-02 21:06:06,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:06" (1/1) ... [2022-11-02 21:06:06,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:06" (1/1) ... [2022-11-02 21:06:06,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:06" (1/1) ... [2022-11-02 21:06:06,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:06" (1/1) ... [2022-11-02 21:06:06,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:06" (1/1) ... [2022-11-02 21:06:06,181 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:06" (1/1) ... [2022-11-02 21:06:06,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:06" (1/1) ... [2022-11-02 21:06:06,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:06:06,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:06:06,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:06:06,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:06:06,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:06" (1/1) ... [2022-11-02 21:06:06,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:06:06,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:06:06,257 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:06:06,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:06:06,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:06:06,305 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-02 21:06:06,305 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-02 21:06:06,305 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-11-02 21:06:06,306 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-11-02 21:06:06,306 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-02 21:06:06,306 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-02 21:06:06,306 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-02 21:06:06,306 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-02 21:06:06,306 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-02 21:06:06,306 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-02 21:06:06,306 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-02 21:06:06,307 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-02 21:06:06,307 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-02 21:06:06,307 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-02 21:06:06,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:06:06,307 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-02 21:06:06,307 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-02 21:06:06,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:06:06,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:06:06,307 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-02 21:06:06,308 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-02 21:06:06,308 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-02 21:06:06,308 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-02 21:06:06,412 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:06:06,415 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:06:07,202 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:06:07,216 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:06:07,216 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-02 21:06:07,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:06:07 BoogieIcfgContainer [2022-11-02 21:06:07,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:06:07,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:06:07,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:06:07,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:06:07,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:06:05" (1/3) ... [2022-11-02 21:06:07,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e0d436 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:06:07, skipping insertion in model container [2022-11-02 21:06:07,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:06:06" (2/3) ... [2022-11-02 21:06:07,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e0d436 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:06:07, skipping insertion in model container [2022-11-02 21:06:07,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:06:07" (3/3) ... [2022-11-02 21:06:07,238 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.04.cil-2.c [2022-11-02 21:06:07,258 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:06:07,258 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-02 21:06:07,322 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:06:07,329 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;@63ac06db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:06:07,329 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 21:06:07,335 INFO L276 IsEmpty]: Start isEmpty. Operand has 262 states, 223 states have (on average 1.6053811659192825) internal successors, (358), 230 states have internal predecessors, (358), 26 states have call successors, (26), 10 states have call predecessors, (26), 10 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-02 21:06:07,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-02 21:06:07,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:07,348 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] [2022-11-02 21:06:07,349 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:07,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:07,354 INFO L85 PathProgramCache]: Analyzing trace with hash -994911012, now seen corresponding path program 1 times [2022-11-02 21:06:07,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:07,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699654729] [2022-11-02 21:06:07,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:07,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:07,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-02 21:06:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:07,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-02 21:06:07,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:06:07,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:07,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699654729] [2022-11-02 21:06:07,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699654729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:07,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:07,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:06:07,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081782495] [2022-11-02 21:06:07,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:07,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:06:07,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:07,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:06:07,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:06:07,819 INFO L87 Difference]: Start difference. First operand has 262 states, 223 states have (on average 1.6053811659192825) internal successors, (358), 230 states have internal predecessors, (358), 26 states have call successors, (26), 10 states have call predecessors, (26), 10 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) 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) [2022-11-02 21:06:08,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:08,208 INFO L93 Difference]: Finished difference Result 576 states and 904 transitions. [2022-11-02 21:06:08,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:06:08,211 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 [2022-11-02 21:06:08,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:08,223 INFO L225 Difference]: With dead ends: 576 [2022-11-02 21:06:08,223 INFO L226 Difference]: Without dead ends: 321 [2022-11-02 21:06:08,228 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 [2022-11-02 21:06:08,237 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 477 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:08,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 669 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:06:08,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-11-02 21:06:08,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 315. [2022-11-02 21:06:08,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 272 states have (on average 1.474264705882353) internal successors, (401), 277 states have internal predecessors, (401), 30 states have call successors, (30), 12 states have call predecessors, (30), 11 states have return successors, (32), 26 states have call predecessors, (32), 26 states have call successors, (32) [2022-11-02 21:06:08,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 463 transitions. [2022-11-02 21:06:08,355 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 463 transitions. Word has length 44 [2022-11-02 21:06:08,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:08,356 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 463 transitions. [2022-11-02 21:06:08,356 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) [2022-11-02 21:06:08,357 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 463 transitions. [2022-11-02 21:06:08,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-02 21:06:08,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:08,360 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] [2022-11-02 21:06:08,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:06:08,360 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:08,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:08,361 INFO L85 PathProgramCache]: Analyzing trace with hash -983625859, now seen corresponding path program 1 times [2022-11-02 21:06:08,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:08,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955101596] [2022-11-02 21:06:08,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:08,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:08,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-02 21:06:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:08,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 21:06:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:06:08,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:08,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955101596] [2022-11-02 21:06:08,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955101596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:08,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:08,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:06:08,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213654990] [2022-11-02 21:06:08,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:08,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:06:08,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:08,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:06:08,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:06:08,455 INFO L87 Difference]: Start difference. First operand 315 states and 463 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) [2022-11-02 21:06:08,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:08,791 INFO L93 Difference]: Finished difference Result 563 states and 803 transitions. [2022-11-02 21:06:08,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:06:08,792 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 [2022-11-02 21:06:08,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:08,796 INFO L225 Difference]: With dead ends: 563 [2022-11-02 21:06:08,796 INFO L226 Difference]: Without dead ends: 439 [2022-11-02 21:06:08,797 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 [2022-11-02 21:06:08,799 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 209 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:08,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 840 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:06:08,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-11-02 21:06:08,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 382. [2022-11-02 21:06:08,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 333 states have (on average 1.4564564564564564) internal successors, (485), 338 states have internal predecessors, (485), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (35), 29 states have call predecessors, (35), 29 states have call successors, (35) [2022-11-02 21:06:08,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 553 transitions. [2022-11-02 21:06:08,834 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 553 transitions. Word has length 45 [2022-11-02 21:06:08,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:08,834 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 553 transitions. [2022-11-02 21:06:08,834 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) [2022-11-02 21:06:08,835 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 553 transitions. [2022-11-02 21:06:08,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-02 21:06:08,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:08,837 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] [2022-11-02 21:06:08,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 21:06:08,838 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:08,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:08,838 INFO L85 PathProgramCache]: Analyzing trace with hash 2026983976, now seen corresponding path program 1 times [2022-11-02 21:06:08,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:08,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379905033] [2022-11-02 21:06:08,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:08,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:08,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-02 21:06:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:08,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 21:06:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:06:08,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:08,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379905033] [2022-11-02 21:06:08,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379905033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:08,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:08,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:06:08,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29784603] [2022-11-02 21:06:08,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:08,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:06:08,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:08,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:06:08,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:06:08,962 INFO L87 Difference]: Start difference. First operand 382 states and 553 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) [2022-11-02 21:06:09,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:09,186 INFO L93 Difference]: Finished difference Result 790 states and 1112 transitions. [2022-11-02 21:06:09,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:06:09,187 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 [2022-11-02 21:06:09,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:09,191 INFO L225 Difference]: With dead ends: 790 [2022-11-02 21:06:09,192 INFO L226 Difference]: Without dead ends: 599 [2022-11-02 21:06:09,197 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 [2022-11-02 21:06:09,201 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 486 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:09,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 663 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:06:09,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-11-02 21:06:09,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 547. [2022-11-02 21:06:09,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 479 states have (on average 1.4091858037578289) internal successors, (675), 487 states have internal predecessors, (675), 44 states have call successors, (44), 22 states have call predecessors, (44), 22 states have return successors, (52), 38 states have call predecessors, (52), 40 states have call successors, (52) [2022-11-02 21:06:09,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 771 transitions. [2022-11-02 21:06:09,267 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 771 transitions. Word has length 45 [2022-11-02 21:06:09,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:09,268 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 771 transitions. [2022-11-02 21:06:09,269 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) [2022-11-02 21:06:09,270 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 771 transitions. [2022-11-02 21:06:09,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-02 21:06:09,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:09,277 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] [2022-11-02 21:06:09,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 21:06:09,277 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:09,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:09,278 INFO L85 PathProgramCache]: Analyzing trace with hash -89185588, now seen corresponding path program 1 times [2022-11-02 21:06:09,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:09,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47913595] [2022-11-02 21:06:09,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:09,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:09,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-02 21:06:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:09,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 21:06:09,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:09,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 21:06:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 21:06:09,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:09,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47913595] [2022-11-02 21:06:09,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47913595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:09,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:09,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:06:09,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142852211] [2022-11-02 21:06:09,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:09,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:06:09,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:09,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:06:09,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:06:09,393 INFO L87 Difference]: Start difference. First operand 547 states and 771 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) [2022-11-02 21:06:09,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:09,765 INFO L93 Difference]: Finished difference Result 1131 states and 1556 transitions. [2022-11-02 21:06:09,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:06:09,766 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 [2022-11-02 21:06:09,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:09,773 INFO L225 Difference]: With dead ends: 1131 [2022-11-02 21:06:09,773 INFO L226 Difference]: Without dead ends: 775 [2022-11-02 21:06:09,774 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 [2022-11-02 21:06:09,786 INFO L413 NwaCegarLoop]: 442 mSDtfsCounter, 193 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:09,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 895 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:06:09,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-11-02 21:06:09,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 737. [2022-11-02 21:06:09,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 645 states have (on average 1.3565891472868217) internal successors, (875), 655 states have internal predecessors, (875), 58 states have call successors, (58), 30 states have call predecessors, (58), 32 states have return successors, (76), 52 states have call predecessors, (76), 54 states have call successors, (76) [2022-11-02 21:06:09,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1009 transitions. [2022-11-02 21:06:09,850 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1009 transitions. Word has length 62 [2022-11-02 21:06:09,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:09,852 INFO L495 AbstractCegarLoop]: Abstraction has 737 states and 1009 transitions. [2022-11-02 21:06:09,852 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) [2022-11-02 21:06:09,853 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1009 transitions. [2022-11-02 21:06:09,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 21:06:09,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:09,857 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] [2022-11-02 21:06:09,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 21:06:09,860 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:09,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:09,860 INFO L85 PathProgramCache]: Analyzing trace with hash 613039140, now seen corresponding path program 1 times [2022-11-02 21:06:09,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:09,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452471425] [2022-11-02 21:06:09,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:09,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:09,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-02 21:06:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:09,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 21:06:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:09,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-02 21:06:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 21:06:09,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:09,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452471425] [2022-11-02 21:06:09,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452471425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:09,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:09,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:06:09,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860554516] [2022-11-02 21:06:09,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:09,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:06:09,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:09,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:06:09,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:06:09,950 INFO L87 Difference]: Start difference. First operand 737 states and 1009 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) [2022-11-02 21:06:10,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:10,173 INFO L93 Difference]: Finished difference Result 1390 states and 1862 transitions. [2022-11-02 21:06:10,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:06:10,173 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 [2022-11-02 21:06:10,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:10,178 INFO L225 Difference]: With dead ends: 1390 [2022-11-02 21:06:10,179 INFO L226 Difference]: Without dead ends: 936 [2022-11-02 21:06:10,180 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 [2022-11-02 21:06:10,181 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 473 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:10,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 660 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:06:10,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-11-02 21:06:10,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 881. [2022-11-02 21:06:10,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 773 states have (on average 1.3272962483829236) internal successors, (1026), 785 states have internal predecessors, (1026), 66 states have call successors, (66), 36 states have call predecessors, (66), 40 states have return successors, (90), 60 states have call predecessors, (90), 62 states have call successors, (90) [2022-11-02 21:06:10,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1182 transitions. [2022-11-02 21:06:10,262 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1182 transitions. Word has length 67 [2022-11-02 21:06:10,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:10,262 INFO L495 AbstractCegarLoop]: Abstraction has 881 states and 1182 transitions. [2022-11-02 21:06:10,263 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) [2022-11-02 21:06:10,263 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1182 transitions. [2022-11-02 21:06:10,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-02 21:06:10,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:10,265 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:06:10,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 21:06:10,266 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:10,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:10,266 INFO L85 PathProgramCache]: Analyzing trace with hash 250622658, now seen corresponding path program 1 times [2022-11-02 21:06:10,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:10,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760719430] [2022-11-02 21:06:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:10,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:10,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-02 21:06:10,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:10,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-02 21:06:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:10,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-02 21:06:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:06:10,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:10,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760719430] [2022-11-02 21:06:10,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760719430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:06:10,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669713101] [2022-11-02 21:06:10,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:10,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:10,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:06:10,425 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:06:10,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:06:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:10,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 21:06:10,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:06:10,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:06:10,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669713101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:10,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:06:10,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-02 21:06:10,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208724566] [2022-11-02 21:06:10,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:10,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:06:10,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:10,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:06:10,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:06:10,635 INFO L87 Difference]: Start difference. First operand 881 states and 1182 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:06:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:10,736 INFO L93 Difference]: Finished difference Result 1424 states and 1905 transitions. [2022-11-02 21:06:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:06:10,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-11-02 21:06:10,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:10,742 INFO L225 Difference]: With dead ends: 1424 [2022-11-02 21:06:10,742 INFO L226 Difference]: Without dead ends: 879 [2022-11-02 21:06:10,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:06:10,745 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 72 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:10,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 766 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:06:10,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-11-02 21:06:10,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 835. [2022-11-02 21:06:10,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 733 states have (on average 1.311050477489768) internal successors, (961), 745 states have internal predecessors, (961), 62 states have call successors, (62), 34 states have call predecessors, (62), 38 states have return successors, (84), 56 states have call predecessors, (84), 58 states have call successors, (84) [2022-11-02 21:06:10,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1107 transitions. [2022-11-02 21:06:10,821 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1107 transitions. Word has length 68 [2022-11-02 21:06:10,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:10,824 INFO L495 AbstractCegarLoop]: Abstraction has 835 states and 1107 transitions. [2022-11-02 21:06:10,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:06:10,824 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1107 transitions. [2022-11-02 21:06:10,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-02 21:06:10,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:10,827 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] [2022-11-02 21:06:10,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:11,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:11,041 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:11,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:11,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1864372863, now seen corresponding path program 1 times [2022-11-02 21:06:11,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:11,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342808346] [2022-11-02 21:06:11,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:11,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:11,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-02 21:06:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:11,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-02 21:06:11,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:11,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-02 21:06:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:06:11,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:11,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342808346] [2022-11-02 21:06:11,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342808346] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:06:11,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398943836] [2022-11-02 21:06:11,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:11,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:11,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:06:11,265 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:06:11,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:06:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:11,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:06:11,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:06:11,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:06:11,546 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-02 21:06:11,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398943836] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 21:06:11,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:06:11,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-11-02 21:06:11,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998589931] [2022-11-02 21:06:11,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:11,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:06:11,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:11,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:06:11,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:06:11,549 INFO L87 Difference]: Start difference. First operand 835 states and 1107 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) [2022-11-02 21:06:11,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:11,728 INFO L93 Difference]: Finished difference Result 887 states and 1169 transitions. [2022-11-02 21:06:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:06:11,729 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 [2022-11-02 21:06:11,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:11,733 INFO L225 Difference]: With dead ends: 887 [2022-11-02 21:06:11,733 INFO L226 Difference]: Without dead ends: 884 [2022-11-02 21:06:11,734 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 [2022-11-02 21:06:11,734 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 651 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:11,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 459 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:06:11,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-11-02 21:06:11,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 834. [2022-11-02 21:06:11,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 733 states have (on average 1.3083219645293316) internal successors, (959), 744 states have internal predecessors, (959), 61 states have call successors, (61), 34 states have call predecessors, (61), 38 states have return successors, (84), 56 states have call predecessors, (84), 58 states have call successors, (84) [2022-11-02 21:06:11,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1104 transitions. [2022-11-02 21:06:11,801 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1104 transitions. Word has length 68 [2022-11-02 21:06:11,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:11,801 INFO L495 AbstractCegarLoop]: Abstraction has 834 states and 1104 transitions. [2022-11-02 21:06:11,802 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) [2022-11-02 21:06:11,802 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1104 transitions. [2022-11-02 21:06:11,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-02 21:06:11,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:11,804 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] [2022-11-02 21:06:11,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-02 21:06:12,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:12,017 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:12,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:12,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1961817817, now seen corresponding path program 1 times [2022-11-02 21:06:12,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:12,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175515562] [2022-11-02 21:06:12,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:12,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:12,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-02 21:06:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:12,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-02 21:06:12,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:12,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-02 21:06:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:06:12,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:12,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175515562] [2022-11-02 21:06:12,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175515562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:06:12,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512653855] [2022-11-02 21:06:12,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:12,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:12,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:06:12,166 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:06:12,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 21:06:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:12,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:06:12,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:06:12,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:06:12,665 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-02 21:06:12,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512653855] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:06:12,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:06:12,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-11-02 21:06:12,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072117028] [2022-11-02 21:06:12,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:06:12,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 21:06:12,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:12,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 21:06:12,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:06:12,678 INFO L87 Difference]: Start difference. First operand 834 states and 1104 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) [2022-11-02 21:06:14,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:14,293 INFO L93 Difference]: Finished difference Result 2344 states and 3042 transitions. [2022-11-02 21:06:14,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-02 21:06:14,294 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 [2022-11-02 21:06:14,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:14,301 INFO L225 Difference]: With dead ends: 2344 [2022-11-02 21:06:14,301 INFO L226 Difference]: Without dead ends: 1848 [2022-11-02 21:06:14,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-11-02 21:06:14,304 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 1090 mSDsluCounter, 2038 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 2533 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:14,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1115 Valid, 2533 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 21:06:14,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1848 states. [2022-11-02 21:06:14,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1848 to 1213. [2022-11-02 21:06:14,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1073 states have (on average 1.277726001863933) internal successors, (1371), 1092 states have internal predecessors, (1371), 81 states have call successors, (81), 48 states have call predecessors, (81), 57 states have return successors, (118), 73 states have call predecessors, (118), 78 states have call successors, (118) [2022-11-02 21:06:14,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1570 transitions. [2022-11-02 21:06:14,414 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1570 transitions. Word has length 69 [2022-11-02 21:06:14,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:14,415 INFO L495 AbstractCegarLoop]: Abstraction has 1213 states and 1570 transitions. [2022-11-02 21:06:14,415 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) [2022-11-02 21:06:14,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1570 transitions. [2022-11-02 21:06:14,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-02 21:06:14,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:14,418 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] [2022-11-02 21:06:14,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-02 21:06:14,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 21:06:14,653 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:14,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:14,654 INFO L85 PathProgramCache]: Analyzing trace with hash 484677058, now seen corresponding path program 1 times [2022-11-02 21:06:14,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:14,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047452865] [2022-11-02 21:06:14,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:14,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:14,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-02 21:06:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:14,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-02 21:06:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:14,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 21:06:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:14,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-02 21:06:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-02 21:06:14,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:14,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047452865] [2022-11-02 21:06:14,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047452865] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:06:14,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414101754] [2022-11-02 21:06:14,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:14,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:14,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:06:14,777 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:06:14,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 21:06:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:14,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 21:06:14,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-02 21:06:14,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:06:14,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414101754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:14,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:06:14,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-02 21:06:14,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593977510] [2022-11-02 21:06:14,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:14,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:06:14,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:14,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:06:14,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:06:14,930 INFO L87 Difference]: Start difference. First operand 1213 states and 1570 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 21:06:15,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:15,025 INFO L93 Difference]: Finished difference Result 1904 states and 2445 transitions. [2022-11-02 21:06:15,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:06:15,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2022-11-02 21:06:15,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:15,030 INFO L225 Difference]: With dead ends: 1904 [2022-11-02 21:06:15,030 INFO L226 Difference]: Without dead ends: 1135 [2022-11-02 21:06:15,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:06:15,033 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 330 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:15,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 474 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:06:15,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2022-11-02 21:06:15,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 1126. [2022-11-02 21:06:15,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 996 states have (on average 1.2720883534136547) internal successors, (1267), 1014 states have internal predecessors, (1267), 77 states have call successors, (77), 44 states have call predecessors, (77), 51 states have return successors, (110), 68 states have call predecessors, (110), 74 states have call successors, (110) [2022-11-02 21:06:15,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1454 transitions. [2022-11-02 21:06:15,141 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1454 transitions. Word has length 88 [2022-11-02 21:06:15,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:15,142 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1454 transitions. [2022-11-02 21:06:15,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 21:06:15,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1454 transitions. [2022-11-02 21:06:15,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-02 21:06:15,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:15,145 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] [2022-11-02 21:06:15,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:15,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:15,363 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:15,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:15,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1240141234, now seen corresponding path program 1 times [2022-11-02 21:06:15,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:15,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250145392] [2022-11-02 21:06:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:15,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:15,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:06:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:15,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:06:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:15,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 21:06:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:15,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-02 21:06:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:15,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-02 21:06:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:06:15,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:15,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250145392] [2022-11-02 21:06:15,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250145392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:15,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:15,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:06:15,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250159995] [2022-11-02 21:06:15,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:15,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:06:15,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:15,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:06:15,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:06:15,468 INFO L87 Difference]: Start difference. First operand 1126 states and 1454 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 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) [2022-11-02 21:06:16,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:16,266 INFO L93 Difference]: Finished difference Result 1354 states and 1810 transitions. [2022-11-02 21:06:16,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:06:16,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 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 91 [2022-11-02 21:06:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:16,272 INFO L225 Difference]: With dead ends: 1354 [2022-11-02 21:06:16,272 INFO L226 Difference]: Without dead ends: 1180 [2022-11-02 21:06:16,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:06:16,274 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 498 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:16,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 750 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 21:06:16,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-11-02 21:06:16,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1126. [2022-11-02 21:06:16,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 996 states have (on average 1.2710843373493976) internal successors, (1266), 1014 states have internal predecessors, (1266), 77 states have call successors, (77), 44 states have call predecessors, (77), 51 states have return successors, (110), 68 states have call predecessors, (110), 74 states have call successors, (110) [2022-11-02 21:06:16,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1453 transitions. [2022-11-02 21:06:16,404 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1453 transitions. Word has length 91 [2022-11-02 21:06:16,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:16,404 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1453 transitions. [2022-11-02 21:06:16,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 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) [2022-11-02 21:06:16,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1453 transitions. [2022-11-02 21:06:16,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-02 21:06:16,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:16,426 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] [2022-11-02 21:06:16,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 21:06:16,427 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:16,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:16,427 INFO L85 PathProgramCache]: Analyzing trace with hash 999901488, now seen corresponding path program 1 times [2022-11-02 21:06:16,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:16,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142920400] [2022-11-02 21:06:16,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:16,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:16,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:06:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:16,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:06:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:16,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 21:06:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:16,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-02 21:06:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:16,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-02 21:06:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:06:16,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:16,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142920400] [2022-11-02 21:06:16,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142920400] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:16,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:16,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:06:16,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943685622] [2022-11-02 21:06:16,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:16,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:06:16,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:16,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:06:16,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:06:16,626 INFO L87 Difference]: Start difference. First operand 1126 states and 1453 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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) [2022-11-02 21:06:17,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:17,629 INFO L93 Difference]: Finished difference Result 1351 states and 1806 transitions. [2022-11-02 21:06:17,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:06:17,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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 91 [2022-11-02 21:06:17,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:17,635 INFO L225 Difference]: With dead ends: 1351 [2022-11-02 21:06:17,635 INFO L226 Difference]: Without dead ends: 1179 [2022-11-02 21:06:17,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:06:17,637 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 579 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:17,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 839 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 21:06:17,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-11-02 21:06:17,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1126. [2022-11-02 21:06:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 996 states have (on average 1.2700803212851406) internal successors, (1265), 1014 states have internal predecessors, (1265), 77 states have call successors, (77), 44 states have call predecessors, (77), 51 states have return successors, (110), 68 states have call predecessors, (110), 74 states have call successors, (110) [2022-11-02 21:06:17,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1452 transitions. [2022-11-02 21:06:17,769 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1452 transitions. Word has length 91 [2022-11-02 21:06:17,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:17,769 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1452 transitions. [2022-11-02 21:06:17,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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) [2022-11-02 21:06:17,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1452 transitions. [2022-11-02 21:06:17,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-02 21:06:17,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:17,773 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] [2022-11-02 21:06:17,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 21:06:17,773 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:17,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:17,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1077435410, now seen corresponding path program 1 times [2022-11-02 21:06:17,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:17,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327664507] [2022-11-02 21:06:17,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:17,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:17,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:06:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:17,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:06:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:17,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 21:06:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:17,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-02 21:06:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:17,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-02 21:06:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:06:17,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:17,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327664507] [2022-11-02 21:06:17,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327664507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:17,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:17,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:06:17,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906228081] [2022-11-02 21:06:17,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:17,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:06:17,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:17,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:06:17,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:06:17,898 INFO L87 Difference]: Start difference. First operand 1126 states and 1452 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2022-11-02 21:06:18,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:18,810 INFO L93 Difference]: Finished difference Result 1360 states and 1821 transitions. [2022-11-02 21:06:18,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:06:18,811 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2022-11-02 21:06:18,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:18,816 INFO L225 Difference]: With dead ends: 1360 [2022-11-02 21:06:18,816 INFO L226 Difference]: Without dead ends: 1188 [2022-11-02 21:06:18,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:06:18,818 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 711 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:18,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 877 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 21:06:18,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2022-11-02 21:06:18,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1126. [2022-11-02 21:06:18,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 996 states have (on average 1.2690763052208835) internal successors, (1264), 1014 states have internal predecessors, (1264), 77 states have call successors, (77), 44 states have call predecessors, (77), 51 states have return successors, (110), 68 states have call predecessors, (110), 74 states have call successors, (110) [2022-11-02 21:06:18,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1451 transitions. [2022-11-02 21:06:18,974 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1451 transitions. Word has length 91 [2022-11-02 21:06:18,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:18,974 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1451 transitions. [2022-11-02 21:06:18,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2022-11-02 21:06:18,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1451 transitions. [2022-11-02 21:06:18,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-02 21:06:18,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:18,978 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] [2022-11-02 21:06:18,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 21:06:18,978 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:18,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:18,979 INFO L85 PathProgramCache]: Analyzing trace with hash -190212564, now seen corresponding path program 1 times [2022-11-02 21:06:18,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:18,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533618003] [2022-11-02 21:06:18,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:18,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:19,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:06:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:19,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:06:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:19,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 21:06:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:19,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-02 21:06:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:19,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-02 21:06:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:06:19,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:19,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533618003] [2022-11-02 21:06:19,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533618003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:19,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:19,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:06:19,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062187230] [2022-11-02 21:06:19,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:19,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:06:19,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:19,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:06:19,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:06:19,108 INFO L87 Difference]: Start difference. First operand 1126 states and 1451 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2022-11-02 21:06:20,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:20,094 INFO L93 Difference]: Finished difference Result 1359 states and 1816 transitions. [2022-11-02 21:06:20,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:06:20,095 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2022-11-02 21:06:20,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:20,109 INFO L225 Difference]: With dead ends: 1359 [2022-11-02 21:06:20,109 INFO L226 Difference]: Without dead ends: 1187 [2022-11-02 21:06:20,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:06:20,113 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 709 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:20,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 873 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 21:06:20,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2022-11-02 21:06:20,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1126. [2022-11-02 21:06:20,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 996 states have (on average 1.2680722891566265) internal successors, (1263), 1014 states have internal predecessors, (1263), 77 states have call successors, (77), 44 states have call predecessors, (77), 51 states have return successors, (110), 68 states have call predecessors, (110), 74 states have call successors, (110) [2022-11-02 21:06:20,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1450 transitions. [2022-11-02 21:06:20,271 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1450 transitions. Word has length 91 [2022-11-02 21:06:20,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:20,272 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1450 transitions. [2022-11-02 21:06:20,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2022-11-02 21:06:20,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1450 transitions. [2022-11-02 21:06:20,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-02 21:06:20,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:20,275 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] [2022-11-02 21:06:20,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-02 21:06:20,276 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:20,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:20,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2101255122, now seen corresponding path program 1 times [2022-11-02 21:06:20,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:20,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980802915] [2022-11-02 21:06:20,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:20,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:20,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:06:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:20,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:06:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:20,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 21:06:20,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:20,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-02 21:06:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:20,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-02 21:06:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:06:20,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:20,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980802915] [2022-11-02 21:06:20,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980802915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:20,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:20,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 21:06:20,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118975162] [2022-11-02 21:06:20,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:20,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:06:20,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:20,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:06:20,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:06:20,443 INFO L87 Difference]: Start difference. First operand 1126 states and 1450 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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) [2022-11-02 21:06:22,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:22,516 INFO L93 Difference]: Finished difference Result 1602 states and 2197 transitions. [2022-11-02 21:06:22,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 21:06:22,517 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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 91 [2022-11-02 21:06:22,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:22,524 INFO L225 Difference]: With dead ends: 1602 [2022-11-02 21:06:22,524 INFO L226 Difference]: Without dead ends: 1430 [2022-11-02 21:06:22,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-11-02 21:06:22,526 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 810 mSDsluCounter, 1493 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 2043 SdHoareTripleChecker+Invalid, 1733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:22,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 2043 Invalid, 1733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1648 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-02 21:06:22,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-11-02 21:06:22,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1314. [2022-11-02 21:06:22,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1160 states have (on average 1.306896551724138) internal successors, (1516), 1180 states have internal predecessors, (1516), 93 states have call successors, (93), 50 states have call predecessors, (93), 59 states have return successors, (133), 85 states have call predecessors, (133), 90 states have call successors, (133) [2022-11-02 21:06:22,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1742 transitions. [2022-11-02 21:06:22,720 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1742 transitions. Word has length 91 [2022-11-02 21:06:22,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:22,720 INFO L495 AbstractCegarLoop]: Abstraction has 1314 states and 1742 transitions. [2022-11-02 21:06:22,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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) [2022-11-02 21:06:22,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1742 transitions. [2022-11-02 21:06:22,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-02 21:06:22,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:22,724 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] [2022-11-02 21:06:22,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-02 21:06:22,725 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:22,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:22,725 INFO L85 PathProgramCache]: Analyzing trace with hash -2024354324, now seen corresponding path program 1 times [2022-11-02 21:06:22,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:22,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885524985] [2022-11-02 21:06:22,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:22,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:22,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:06:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:22,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:06:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:22,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 21:06:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:22,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-02 21:06:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:22,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-02 21:06:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:06:22,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:22,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885524985] [2022-11-02 21:06:22,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885524985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:22,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:22,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 21:06:22,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448483230] [2022-11-02 21:06:22,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:22,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:06:22,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:22,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:06:22,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:06:22,911 INFO L87 Difference]: Start difference. First operand 1314 states and 1742 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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) [2022-11-02 21:06:25,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:25,142 INFO L93 Difference]: Finished difference Result 2378 states and 3404 transitions. [2022-11-02 21:06:25,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 21:06:25,149 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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 91 [2022-11-02 21:06:25,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:25,161 INFO L225 Difference]: With dead ends: 2378 [2022-11-02 21:06:25,161 INFO L226 Difference]: Without dead ends: 2020 [2022-11-02 21:06:25,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-11-02 21:06:25,167 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 988 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 1903 SdHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:25,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1010 Valid, 1903 Invalid, 1699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-02 21:06:25,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2022-11-02 21:06:25,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 1666. [2022-11-02 21:06:25,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1470 states have (on average 1.35578231292517) internal successors, (1993), 1494 states have internal predecessors, (1993), 119 states have call successors, (119), 62 states have call predecessors, (119), 75 states have return successors, (175), 113 states have call predecessors, (175), 116 states have call successors, (175) [2022-11-02 21:06:25,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2287 transitions. [2022-11-02 21:06:25,412 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2287 transitions. Word has length 91 [2022-11-02 21:06:25,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:25,412 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 2287 transitions. [2022-11-02 21:06:25,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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) [2022-11-02 21:06:25,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2287 transitions. [2022-11-02 21:06:25,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-02 21:06:25,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:25,417 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] [2022-11-02 21:06:25,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-02 21:06:25,417 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:25,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:25,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1303262318, now seen corresponding path program 1 times [2022-11-02 21:06:25,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:25,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540679124] [2022-11-02 21:06:25,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:25,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:25,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:06:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:25,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:06:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:25,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 21:06:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:25,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-02 21:06:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:25,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-02 21:06:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:06:25,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:25,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540679124] [2022-11-02 21:06:25,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540679124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:25,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:25,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 21:06:25,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455889217] [2022-11-02 21:06:25,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:25,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:06:25,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:25,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:06:25,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:06:25,591 INFO L87 Difference]: Start difference. First operand 1666 states and 2287 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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) [2022-11-02 21:06:27,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:27,754 INFO L93 Difference]: Finished difference Result 3745 states and 5549 transitions. [2022-11-02 21:06:27,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 21:06:27,755 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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 91 [2022-11-02 21:06:27,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:27,769 INFO L225 Difference]: With dead ends: 3745 [2022-11-02 21:06:27,769 INFO L226 Difference]: Without dead ends: 3035 [2022-11-02 21:06:27,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-11-02 21:06:27,773 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 1008 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:27,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 1748 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-02 21:06:27,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2022-11-02 21:06:28,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 2350. [2022-11-02 21:06:28,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 2066 states have (on average 1.40513068731849) internal successors, (2903), 2104 states have internal predecessors, (2903), 169 states have call successors, (169), 86 states have call predecessors, (169), 113 states have return successors, (281), 167 states have call predecessors, (281), 166 states have call successors, (281) [2022-11-02 21:06:28,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 3353 transitions. [2022-11-02 21:06:28,093 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 3353 transitions. Word has length 91 [2022-11-02 21:06:28,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:28,093 INFO L495 AbstractCegarLoop]: Abstraction has 2350 states and 3353 transitions. [2022-11-02 21:06:28,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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) [2022-11-02 21:06:28,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 3353 transitions. [2022-11-02 21:06:28,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-02 21:06:28,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:28,098 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] [2022-11-02 21:06:28,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-02 21:06:28,098 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:28,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:28,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1083247188, now seen corresponding path program 1 times [2022-11-02 21:06:28,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:28,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620922951] [2022-11-02 21:06:28,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:28,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:28,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:06:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:28,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:06:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:28,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 21:06:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:28,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-02 21:06:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:28,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-02 21:06:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:06:28,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:28,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620922951] [2022-11-02 21:06:28,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620922951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:28,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:28,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 21:06:28,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120560825] [2022-11-02 21:06:28,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:28,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:06:28,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:28,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:06:28,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:06:28,253 INFO L87 Difference]: Start difference. First operand 2350 states and 3353 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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) [2022-11-02 21:06:30,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:30,476 INFO L93 Difference]: Finished difference Result 6370 states and 9715 transitions. [2022-11-02 21:06:30,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 21:06:30,477 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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 91 [2022-11-02 21:06:30,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:30,499 INFO L225 Difference]: With dead ends: 6370 [2022-11-02 21:06:30,499 INFO L226 Difference]: Without dead ends: 4976 [2022-11-02 21:06:30,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-11-02 21:06:30,505 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 1095 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:30,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1117 Valid, 1753 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 21:06:30,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2022-11-02 21:06:30,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 3808. [2022-11-02 21:06:30,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3334 states have (on average 1.455608878224355) internal successors, (4853), 3418 states have internal predecessors, (4853), 265 states have call successors, (265), 134 states have call predecessors, (265), 207 states have return successors, (585), 271 states have call predecessors, (585), 262 states have call successors, (585) [2022-11-02 21:06:30,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 5703 transitions. [2022-11-02 21:06:30,997 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 5703 transitions. Word has length 91 [2022-11-02 21:06:30,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:30,997 INFO L495 AbstractCegarLoop]: Abstraction has 3808 states and 5703 transitions. [2022-11-02 21:06:30,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 6 states have internal predecessors, (80), 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) [2022-11-02 21:06:30,998 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 5703 transitions. [2022-11-02 21:06:31,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-02 21:06:31,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:31,003 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] [2022-11-02 21:06:31,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-02 21:06:31,004 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:31,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:31,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1575873362, now seen corresponding path program 1 times [2022-11-02 21:06:31,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:31,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699390903] [2022-11-02 21:06:31,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:31,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:31,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:06:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:31,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:06:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:31,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 21:06:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:31,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-02 21:06:31,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:31,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-02 21:06:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:06:31,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:31,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699390903] [2022-11-02 21:06:31,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699390903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:31,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:31,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:06:31,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270996512] [2022-11-02 21:06:31,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:31,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:06:31,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:31,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:06:31,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:06:31,149 INFO L87 Difference]: Start difference. First operand 3808 states and 5703 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2022-11-02 21:06:32,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:32,594 INFO L93 Difference]: Finished difference Result 7689 states and 12021 transitions. [2022-11-02 21:06:32,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:06:32,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2022-11-02 21:06:32,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:32,618 INFO L225 Difference]: With dead ends: 7689 [2022-11-02 21:06:32,618 INFO L226 Difference]: Without dead ends: 4835 [2022-11-02 21:06:32,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:06:32,626 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 612 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:32,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 1005 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 21:06:32,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4835 states. [2022-11-02 21:06:33,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4835 to 3808. [2022-11-02 21:06:33,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3334 states have (on average 1.4505098980203959) internal successors, (4836), 3418 states have internal predecessors, (4836), 265 states have call successors, (265), 134 states have call predecessors, (265), 207 states have return successors, (585), 271 states have call predecessors, (585), 262 states have call successors, (585) [2022-11-02 21:06:33,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 5686 transitions. [2022-11-02 21:06:33,206 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 5686 transitions. Word has length 91 [2022-11-02 21:06:33,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:33,206 INFO L495 AbstractCegarLoop]: Abstraction has 3808 states and 5686 transitions. [2022-11-02 21:06:33,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2022-11-02 21:06:33,206 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 5686 transitions. [2022-11-02 21:06:33,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-02 21:06:33,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:33,212 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] [2022-11-02 21:06:33,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-02 21:06:33,212 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:33,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:33,213 INFO L85 PathProgramCache]: Analyzing trace with hash -621933204, now seen corresponding path program 1 times [2022-11-02 21:06:33,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:33,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191292368] [2022-11-02 21:06:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:33,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:33,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:33,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:06:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:33,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:06:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:33,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 21:06:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:33,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-02 21:06:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:33,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-02 21:06:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:06:33,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:33,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191292368] [2022-11-02 21:06:33,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191292368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:33,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:33,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:06:33,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669772088] [2022-11-02 21:06:33,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:33,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:06:33,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:33,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:06:33,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:06:33,316 INFO L87 Difference]: Start difference. First operand 3808 states and 5686 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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) [2022-11-02 21:06:35,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:35,377 INFO L93 Difference]: Finished difference Result 9304 states and 14395 transitions. [2022-11-02 21:06:35,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:06:35,378 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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 91 [2022-11-02 21:06:35,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:35,405 INFO L225 Difference]: With dead ends: 9304 [2022-11-02 21:06:35,405 INFO L226 Difference]: Without dead ends: 6452 [2022-11-02 21:06:35,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:06:35,416 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 956 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:35,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [988 Valid, 1335 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 21:06:35,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6452 states. [2022-11-02 21:06:36,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6452 to 5140. [2022-11-02 21:06:36,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5140 states, 4494 states have (on average 1.4581664441477526) internal successors, (6553), 4606 states have internal predecessors, (6553), 369 states have call successors, (369), 182 states have call predecessors, (369), 275 states have return successors, (753), 367 states have call predecessors, (753), 366 states have call successors, (753) [2022-11-02 21:06:36,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5140 states to 5140 states and 7675 transitions. [2022-11-02 21:06:36,217 INFO L78 Accepts]: Start accepts. Automaton has 5140 states and 7675 transitions. Word has length 91 [2022-11-02 21:06:36,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:36,217 INFO L495 AbstractCegarLoop]: Abstraction has 5140 states and 7675 transitions. [2022-11-02 21:06:36,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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) [2022-11-02 21:06:36,218 INFO L276 IsEmpty]: Start isEmpty. Operand 5140 states and 7675 transitions. [2022-11-02 21:06:36,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-02 21:06:36,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:36,225 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] [2022-11-02 21:06:36,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-02 21:06:36,226 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:36,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:36,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1212598261, now seen corresponding path program 1 times [2022-11-02 21:06:36,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:36,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101078763] [2022-11-02 21:06:36,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:36,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:36,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-02 21:06:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:36,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-02 21:06:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:36,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 21:06:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:36,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-02 21:06:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:36,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-02 21:06:36,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-02 21:06:36,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:36,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101078763] [2022-11-02 21:06:36,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101078763] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:06:36,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228859422] [2022-11-02 21:06:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:36,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:36,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:06:36,381 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:06:36,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 21:06:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:36,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 21:06:36,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 21:06:36,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:06:36,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228859422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:36,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:06:36,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-02 21:06:36,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699005645] [2022-11-02 21:06:36,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:36,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:06:36,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:36,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:06:36,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:06:36,528 INFO L87 Difference]: Start difference. First operand 5140 states and 7675 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) [2022-11-02 21:06:36,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:36,903 INFO L93 Difference]: Finished difference Result 5517 states and 8136 transitions. [2022-11-02 21:06:36,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:06:36,904 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 [2022-11-02 21:06:36,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:36,921 INFO L225 Difference]: With dead ends: 5517 [2022-11-02 21:06:36,921 INFO L226 Difference]: Without dead ends: 4199 [2022-11-02 21:06:36,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:06:36,927 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 61 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 751 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 [2022-11-02 21:06:36,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 751 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:06:36,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2022-11-02 21:06:37,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 4199. [2022-11-02 21:06:37,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4199 states, 3656 states have (on average 1.512035010940919) internal successors, (5528), 3752 states have internal predecessors, (5528), 312 states have call successors, (312), 145 states have call predecessors, (312), 230 states have return successors, (661), 317 states have call predecessors, (661), 310 states have call successors, (661) [2022-11-02 21:06:37,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6501 transitions. [2022-11-02 21:06:37,338 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 6501 transitions. Word has length 103 [2022-11-02 21:06:37,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:37,338 INFO L495 AbstractCegarLoop]: Abstraction has 4199 states and 6501 transitions. [2022-11-02 21:06:37,338 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) [2022-11-02 21:06:37,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 6501 transitions. [2022-11-02 21:06:37,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-02 21:06:37,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:37,348 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:06:37,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:37,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:37,577 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:37,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:37,577 INFO L85 PathProgramCache]: Analyzing trace with hash 938550496, now seen corresponding path program 1 times [2022-11-02 21:06:37,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:37,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976034183] [2022-11-02 21:06:37,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:37,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:37,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:06:37,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:37,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:06:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:37,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 21:06:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:37,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-02 21:06:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:37,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-02 21:06:37,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:37,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-02 21:06:37,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:37,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-02 21:06:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:37,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-02 21:06:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:06:37,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:37,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976034183] [2022-11-02 21:06:37,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976034183] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:06:37,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093161108] [2022-11-02 21:06:37,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:37,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:37,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:06:37,751 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:06:37,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 21:06:37,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:37,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 21:06:37,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-02 21:06:37,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:06:37,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093161108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:37,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:06:37,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-11-02 21:06:37,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422749115] [2022-11-02 21:06:37,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:37,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:06:37,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:37,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:06:37,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:06:37,967 INFO L87 Difference]: Start difference. First operand 4199 states and 6501 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 21:06:39,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:39,002 INFO L93 Difference]: Finished difference Result 12445 states and 19391 transitions. [2022-11-02 21:06:39,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:06:39,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 147 [2022-11-02 21:06:39,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:39,032 INFO L225 Difference]: With dead ends: 12445 [2022-11-02 21:06:39,032 INFO L226 Difference]: Without dead ends: 8261 [2022-11-02 21:06:39,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:06:39,051 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 224 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:39,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 529 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:06:39,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8261 states. [2022-11-02 21:06:40,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8261 to 8209. [2022-11-02 21:06:40,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8209 states, 7156 states have (on average 1.5125768585802124) internal successors, (10824), 7346 states have internal predecessors, (10824), 592 states have call successors, (592), 289 states have call predecessors, (592), 460 states have return successors, (1261), 589 states have call predecessors, (1261), 590 states have call successors, (1261) [2022-11-02 21:06:40,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8209 states to 8209 states and 12677 transitions. [2022-11-02 21:06:40,082 INFO L78 Accepts]: Start accepts. Automaton has 8209 states and 12677 transitions. Word has length 147 [2022-11-02 21:06:40,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:40,083 INFO L495 AbstractCegarLoop]: Abstraction has 8209 states and 12677 transitions. [2022-11-02 21:06:40,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 21:06:40,083 INFO L276 IsEmpty]: Start isEmpty. Operand 8209 states and 12677 transitions. [2022-11-02 21:06:40,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-02 21:06:40,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:40,098 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:06:40,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:40,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:40,325 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:40,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:40,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1136564032, now seen corresponding path program 1 times [2022-11-02 21:06:40,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:40,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78547109] [2022-11-02 21:06:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:40,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:40,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:06:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:40,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:06:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:40,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 21:06:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:40,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-02 21:06:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:40,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-02 21:06:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:40,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-02 21:06:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:40,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-02 21:06:40,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:40,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-02 21:06:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:06:40,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:40,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78547109] [2022-11-02 21:06:40,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78547109] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:06:40,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818653285] [2022-11-02 21:06:40,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:40,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:40,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:06:40,505 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:06:40,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 21:06:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:40,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 21:06:40,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:06:40,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:06:40,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818653285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:40,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:06:40,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-11-02 21:06:40,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815497927] [2022-11-02 21:06:40,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:40,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:06:40,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:40,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:06:40,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:06:40,729 INFO L87 Difference]: Start difference. First operand 8209 states and 12677 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 21:06:42,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:42,243 INFO L93 Difference]: Finished difference Result 24427 states and 37983 transitions. [2022-11-02 21:06:42,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:06:42,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 147 [2022-11-02 21:06:42,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:42,303 INFO L225 Difference]: With dead ends: 24427 [2022-11-02 21:06:42,303 INFO L226 Difference]: Without dead ends: 16233 [2022-11-02 21:06:42,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:06:42,330 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 212 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:42,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 529 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:06:42,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16233 states. [2022-11-02 21:06:44,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16233 to 16133. [2022-11-02 21:06:44,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16133 states, 14060 states have (on average 1.5112375533428164) internal successors, (21248), 14438 states have internal predecessors, (21248), 1152 states have call successors, (1152), 577 states have call predecessors, (1152), 920 states have return successors, (2461), 1133 states have call predecessors, (2461), 1150 states have call successors, (2461) [2022-11-02 21:06:44,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16133 states to 16133 states and 24861 transitions. [2022-11-02 21:06:44,323 INFO L78 Accepts]: Start accepts. Automaton has 16133 states and 24861 transitions. Word has length 147 [2022-11-02 21:06:44,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:44,324 INFO L495 AbstractCegarLoop]: Abstraction has 16133 states and 24861 transitions. [2022-11-02 21:06:44,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 21:06:44,324 INFO L276 IsEmpty]: Start isEmpty. Operand 16133 states and 24861 transitions. [2022-11-02 21:06:44,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-02 21:06:44,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:44,349 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:06:44,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:44,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:44,565 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:44,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:44,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1659927712, now seen corresponding path program 1 times [2022-11-02 21:06:44,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:44,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106677983] [2022-11-02 21:06:44,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:44,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:44,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:06:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:44,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:06:44,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:44,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 21:06:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:44,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-02 21:06:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:44,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-02 21:06:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:44,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-02 21:06:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:44,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-02 21:06:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:44,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-02 21:06:44,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:06:44,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:44,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106677983] [2022-11-02 21:06:44,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106677983] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:06:44,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259592856] [2022-11-02 21:06:44,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:44,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:44,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:06:44,742 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:06:44,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 21:06:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:44,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 21:06:44,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:44,898 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 21:06:44,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:06:44,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259592856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:44,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:06:44,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-02 21:06:44,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82212906] [2022-11-02 21:06:44,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:44,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:06:44,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:44,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:06:44,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:06:44,901 INFO L87 Difference]: Start difference. First operand 16133 states and 24861 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 21:06:47,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:47,780 INFO L93 Difference]: Finished difference Result 47731 states and 74283 transitions. [2022-11-02 21:06:47,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:06:47,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 147 [2022-11-02 21:06:47,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:47,924 INFO L225 Difference]: With dead ends: 47731 [2022-11-02 21:06:47,924 INFO L226 Difference]: Without dead ends: 31615 [2022-11-02 21:06:47,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:06:47,965 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 229 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:47,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 782 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:06:47,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31615 states. [2022-11-02 21:06:51,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31615 to 31615. [2022-11-02 21:06:51,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31615 states, 27537 states have (on average 1.503431746377601) internal successors, (41400), 28260 states have internal predecessors, (41400), 2237 states have call successors, (2237), 1153 states have call predecessors, (2237), 1840 states have return successors, (5363), 2233 states have call predecessors, (5363), 2235 states have call successors, (5363) [2022-11-02 21:06:51,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31615 states to 31615 states and 49000 transitions. [2022-11-02 21:06:51,662 INFO L78 Accepts]: Start accepts. Automaton has 31615 states and 49000 transitions. Word has length 147 [2022-11-02 21:06:51,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:51,662 INFO L495 AbstractCegarLoop]: Abstraction has 31615 states and 49000 transitions. [2022-11-02 21:06:51,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 21:06:51,663 INFO L276 IsEmpty]: Start isEmpty. Operand 31615 states and 49000 transitions. [2022-11-02 21:06:51,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-02 21:06:51,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:51,750 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:06:51,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:51,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:51,965 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:51,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:51,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1981268215, now seen corresponding path program 1 times [2022-11-02 21:06:51,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:51,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979724777] [2022-11-02 21:06:51,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:51,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:52,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:06:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:52,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:06:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:52,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 21:06:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:52,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-02 21:06:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:52,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-02 21:06:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:52,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-02 21:06:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:52,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-02 21:06:52,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:52,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-11-02 21:06:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:52,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-02 21:06:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:52,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-11-02 21:06:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-02 21:06:52,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:52,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979724777] [2022-11-02 21:06:52,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979724777] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:06:52,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997730031] [2022-11-02 21:06:52,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:52,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:52,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:06:52,177 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:06:52,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 21:06:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:52,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 21:06:52,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 21:06:52,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:06:52,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997730031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:52,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:06:52,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-11-02 21:06:52,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187882771] [2022-11-02 21:06:52,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:52,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:06:52,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:52,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:06:52,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:06:52,551 INFO L87 Difference]: Start difference. First operand 31615 states and 49000 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-02 21:06:58,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:58,639 INFO L93 Difference]: Finished difference Result 93763 states and 146572 transitions. [2022-11-02 21:06:58,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:06:58,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 191 [2022-11-02 21:06:58,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:58,908 INFO L225 Difference]: With dead ends: 93763 [2022-11-02 21:06:58,908 INFO L226 Difference]: Without dead ends: 62171 [2022-11-02 21:06:59,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:06:59,014 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 164 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:59,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 529 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:06:59,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62171 states. [2022-11-02 21:07:06,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62171 to 61783. [2022-11-02 21:07:06,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61783 states, 53881 states have (on average 1.5037582821402722) internal successors, (81024), 55324 states have internal predecessors, (81024), 4245 states have call successors, (4245), 2281 states have call predecessors, (4245), 3656 states have return successors, (10321), 4209 states have call predecessors, (10321), 4243 states have call successors, (10321) [2022-11-02 21:07:06,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61783 states to 61783 states and 95590 transitions. [2022-11-02 21:07:06,655 INFO L78 Accepts]: Start accepts. Automaton has 61783 states and 95590 transitions. Word has length 191 [2022-11-02 21:07:06,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:07:06,656 INFO L495 AbstractCegarLoop]: Abstraction has 61783 states and 95590 transitions. [2022-11-02 21:07:06,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-02 21:07:06,656 INFO L276 IsEmpty]: Start isEmpty. Operand 61783 states and 95590 transitions. [2022-11-02 21:07:06,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-02 21:07:06,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:07:06,832 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:07:06,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-02 21:07:07,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-02 21:07:07,049 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:07:07,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:07,050 INFO L85 PathProgramCache]: Analyzing trace with hash -275882679, now seen corresponding path program 1 times [2022-11-02 21:07:07,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:07,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456650607] [2022-11-02 21:07:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:07,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:07,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:07:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:07,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:07:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:07,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 21:07:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:07,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-02 21:07:07,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:07,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-02 21:07:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:07,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-02 21:07:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:07,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-02 21:07:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:07,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-02 21:07:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:07,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-02 21:07:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:07,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-11-02 21:07:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:07,273 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-02 21:07:07,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:07,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456650607] [2022-11-02 21:07:07,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456650607] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:07:07,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361309932] [2022-11-02 21:07:07,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:07,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:07,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:07:07,276 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:07:07,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f9fcddb-75ff-4c09-b27c-717ede896722/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 21:07:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:07,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 21:07:07,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:07:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 21:07:07,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:07:07,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361309932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:07,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:07:07,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-11-02 21:07:07,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361129418] [2022-11-02 21:07:07,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:07,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:07:07,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:07,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:07:07,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:07:07,657 INFO L87 Difference]: Start difference. First operand 61783 states and 95590 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10)