./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/byte_add-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 19:51:47,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:51:47,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:51:47,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:51:47,445 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:51:47,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:51:47,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:51:47,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:51:47,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:51:47,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:51:47,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:51:47,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:51:47,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:51:47,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:51:47,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:51:47,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:51:47,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:51:47,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:51:47,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:51:47,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:51:47,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:51:47,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:51:47,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:51:47,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:51:47,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:51:47,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:51:47,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:51:47,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:51:47,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:51:47,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:51:47,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:51:47,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:51:47,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:51:47,508 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:51:47,509 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:51:47,509 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:51:47,510 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:51:47,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:51:47,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:51:47,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:51:47,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:51:47,514 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 19:51:47,536 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:51:47,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:51:47,537 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:51:47,537 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:51:47,538 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:51:47,538 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:51:47,539 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:51:47,539 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:51:47,540 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:51:47,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:51:47,540 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:51:47,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:51:47,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:51:47,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:51:47,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:51:47,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:51:47,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:51:47,542 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:51:47,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:51:47,543 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:51:47,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:51:47,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:51:47,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:51:47,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:51:47,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:51:47,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:51:47,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:51:47,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:51:47,545 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:51:47,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:51:47,546 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:51:47,546 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:51:47,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:51:47,547 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_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 [2022-11-18 19:51:47,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:51:47,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:51:47,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:51:47,875 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:51:47,877 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:51:47,879 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/bitvector/byte_add-1.i [2022-11-18 19:51:47,967 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/data/523d15db6/4bd59acf5e4c4835b1e6a693dc723d33/FLAG3d4c87543 [2022-11-18 19:51:48,496 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:51:48,496 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/sv-benchmarks/c/bitvector/byte_add-1.i [2022-11-18 19:51:48,510 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/data/523d15db6/4bd59acf5e4c4835b1e6a693dc723d33/FLAG3d4c87543 [2022-11-18 19:51:48,862 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/data/523d15db6/4bd59acf5e4c4835b1e6a693dc723d33 [2022-11-18 19:51:48,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:51:48,867 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:51:48,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:51:48,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:51:48,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:51:48,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:51:48" (1/1) ... [2022-11-18 19:51:48,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fef530f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:48, skipping insertion in model container [2022-11-18 19:51:48,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:51:48" (1/1) ... [2022-11-18 19:51:48,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:51:48,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:51:49,095 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/sv-benchmarks/c/bitvector/byte_add-1.i[1166,1179] [2022-11-18 19:51:49,164 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:51:49,187 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:51:49,199 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/sv-benchmarks/c/bitvector/byte_add-1.i[1166,1179] [2022-11-18 19:51:49,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:51:49,247 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:51:49,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:49 WrapperNode [2022-11-18 19:51:49,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:51:49,249 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:51:49,249 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:51:49,249 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:51:49,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:49" (1/1) ... [2022-11-18 19:51:49,282 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:49" (1/1) ... [2022-11-18 19:51:49,315 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 138 [2022-11-18 19:51:49,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:51:49,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:51:49,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:51:49,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:51:49,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:49" (1/1) ... [2022-11-18 19:51:49,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:49" (1/1) ... [2022-11-18 19:51:49,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:49" (1/1) ... [2022-11-18 19:51:49,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:49" (1/1) ... [2022-11-18 19:51:49,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:49" (1/1) ... [2022-11-18 19:51:49,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:49" (1/1) ... [2022-11-18 19:51:49,349 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:49" (1/1) ... [2022-11-18 19:51:49,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:49" (1/1) ... [2022-11-18 19:51:49,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:51:49,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:51:49,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:51:49,356 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:51:49,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:49" (1/1) ... [2022-11-18 19:51:49,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:51:49,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:51:49,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:51:49,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:51:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:51:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:51:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:51:49,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:51:49,559 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:51:49,564 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:51:50,135 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:51:50,146 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:51:50,146 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 19:51:50,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:51:50 BoogieIcfgContainer [2022-11-18 19:51:50,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:51:50,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:51:50,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:51:50,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:51:50,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:51:48" (1/3) ... [2022-11-18 19:51:50,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72437583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:51:50, skipping insertion in model container [2022-11-18 19:51:50,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:51:49" (2/3) ... [2022-11-18 19:51:50,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72437583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:51:50, skipping insertion in model container [2022-11-18 19:51:50,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:51:50" (3/3) ... [2022-11-18 19:51:50,157 INFO L112 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2022-11-18 19:51:50,177 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:51:50,177 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:51:50,228 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:51:50,235 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;@66c86f75, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:51:50,235 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 19:51:50,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 46 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:50,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:51:50,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:50,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:50,248 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:50,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:50,253 INFO L85 PathProgramCache]: Analyzing trace with hash 903950584, now seen corresponding path program 1 times [2022-11-18 19:51:50,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:50,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712170054] [2022-11-18 19:51:50,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:50,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:51:50,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:50,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712170054] [2022-11-18 19:51:50,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712170054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:50,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:51:50,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:51:50,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928019029] [2022-11-18 19:51:50,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:50,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:51:50,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:50,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:51:50,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:51:50,521 INFO L87 Difference]: Start difference. First operand has 47 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 46 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:50,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:50,545 INFO L93 Difference]: Finished difference Result 64 states and 105 transitions. [2022-11-18 19:51:50,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:51:50,548 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:51:50,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:50,558 INFO L225 Difference]: With dead ends: 64 [2022-11-18 19:51:50,558 INFO L226 Difference]: Without dead ends: 43 [2022-11-18 19:51:50,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:51:50,572 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:50,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:51:50,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-18 19:51:50,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-18 19:51:50,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 42 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:50,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 73 transitions. [2022-11-18 19:51:50,619 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 73 transitions. Word has length 13 [2022-11-18 19:51:50,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:50,619 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 73 transitions. [2022-11-18 19:51:50,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:50,620 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 73 transitions. [2022-11-18 19:51:50,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:51:50,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:50,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:50,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:51:50,624 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:50,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:50,627 INFO L85 PathProgramCache]: Analyzing trace with hash 430337229, now seen corresponding path program 1 times [2022-11-18 19:51:50,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:50,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265703894] [2022-11-18 19:51:50,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:50,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:51:50,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:50,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265703894] [2022-11-18 19:51:50,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265703894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:50,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:51:50,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:51:50,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819053571] [2022-11-18 19:51:50,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:50,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:51:50,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:50,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:51:50,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:51:50,950 INFO L87 Difference]: Start difference. First operand 43 states and 73 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:51,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:51,088 INFO L93 Difference]: Finished difference Result 102 states and 179 transitions. [2022-11-18 19:51:51,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:51:51,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:51:51,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:51,090 INFO L225 Difference]: With dead ends: 102 [2022-11-18 19:51:51,090 INFO L226 Difference]: Without dead ends: 69 [2022-11-18 19:51:51,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:51:51,092 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 29 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:51,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 77 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:51:51,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-18 19:51:51,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2022-11-18 19:51:51,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.5606060606060606) internal successors, (103), 66 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 103 transitions. [2022-11-18 19:51:51,102 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 103 transitions. Word has length 13 [2022-11-18 19:51:51,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:51,103 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 103 transitions. [2022-11-18 19:51:51,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:51,103 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 103 transitions. [2022-11-18 19:51:51,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-18 19:51:51,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:51,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:51,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 19:51:51,105 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:51,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:51,106 INFO L85 PathProgramCache]: Analyzing trace with hash -2037878536, now seen corresponding path program 1 times [2022-11-18 19:51:51,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:51,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494170931] [2022-11-18 19:51:51,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:51,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:51:51,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:51,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494170931] [2022-11-18 19:51:51,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494170931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:51,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:51:51,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:51:51,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428008232] [2022-11-18 19:51:51,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:51,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:51:51,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:51,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:51:51,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:51:51,411 INFO L87 Difference]: Start difference. First operand 67 states and 103 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:51,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:51,781 INFO L93 Difference]: Finished difference Result 168 states and 287 transitions. [2022-11-18 19:51:51,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:51:51,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-18 19:51:51,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:51,783 INFO L225 Difference]: With dead ends: 168 [2022-11-18 19:51:51,784 INFO L226 Difference]: Without dead ends: 135 [2022-11-18 19:51:51,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:51:51,785 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 112 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:51,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 105 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 19:51:51,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-18 19:51:51,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 93. [2022-11-18 19:51:51,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.5543478260869565) internal successors, (143), 92 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 143 transitions. [2022-11-18 19:51:51,797 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 143 transitions. Word has length 19 [2022-11-18 19:51:51,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:51,797 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 143 transitions. [2022-11-18 19:51:51,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:51,798 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 143 transitions. [2022-11-18 19:51:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 19:51:51,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:51,799 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:51,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 19:51:51,799 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:51,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:51,800 INFO L85 PathProgramCache]: Analyzing trace with hash -21369817, now seen corresponding path program 1 times [2022-11-18 19:51:51,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:51,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732106968] [2022-11-18 19:51:51,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:51,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 19:51:52,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:52,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732106968] [2022-11-18 19:51:52,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732106968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:52,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:51:52,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:51:52,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218642044] [2022-11-18 19:51:52,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:52,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:51:52,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:52,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:51:52,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:51:52,005 INFO L87 Difference]: Start difference. First operand 93 states and 143 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:52,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:52,238 INFO L93 Difference]: Finished difference Result 272 states and 412 transitions. [2022-11-18 19:51:52,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:51:52,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-18 19:51:52,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:52,241 INFO L225 Difference]: With dead ends: 272 [2022-11-18 19:51:52,241 INFO L226 Difference]: Without dead ends: 192 [2022-11-18 19:51:52,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:51:52,243 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 105 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:52,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 201 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:51:52,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-18 19:51:52,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 101. [2022-11-18 19:51:52,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.52) internal successors, (152), 100 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:52,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 152 transitions. [2022-11-18 19:51:52,257 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 152 transitions. Word has length 25 [2022-11-18 19:51:52,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:52,257 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 152 transitions. [2022-11-18 19:51:52,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:52,258 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 152 transitions. [2022-11-18 19:51:52,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 19:51:52,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:52,259 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:52,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 19:51:52,260 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:52,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:52,260 INFO L85 PathProgramCache]: Analyzing trace with hash -53067146, now seen corresponding path program 1 times [2022-11-18 19:51:52,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:52,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675639730] [2022-11-18 19:51:52,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:52,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 19:51:52,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:52,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675639730] [2022-11-18 19:51:52,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675639730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:52,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:51:52,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:51:52,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701522040] [2022-11-18 19:51:52,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:52,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:51:52,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:52,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:51:52,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:51:52,444 INFO L87 Difference]: Start difference. First operand 101 states and 152 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:52,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:52,657 INFO L93 Difference]: Finished difference Result 293 states and 438 transitions. [2022-11-18 19:51:52,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:51:52,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-18 19:51:52,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:52,660 INFO L225 Difference]: With dead ends: 293 [2022-11-18 19:51:52,660 INFO L226 Difference]: Without dead ends: 212 [2022-11-18 19:51:52,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:51:52,663 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 109 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:52,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 209 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:51:52,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-18 19:51:52,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 111. [2022-11-18 19:51:52,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.5) internal successors, (165), 110 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:52,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 165 transitions. [2022-11-18 19:51:52,674 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 165 transitions. Word has length 26 [2022-11-18 19:51:52,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:52,680 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 165 transitions. [2022-11-18 19:51:52,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:52,684 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 165 transitions. [2022-11-18 19:51:52,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-18 19:51:52,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:52,690 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:52,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 19:51:52,691 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:52,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:52,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1351948728, now seen corresponding path program 1 times [2022-11-18 19:51:52,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:52,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114085998] [2022-11-18 19:51:52,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:52,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:52,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:51:52,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:52,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114085998] [2022-11-18 19:51:52,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114085998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:51:52,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834963564] [2022-11-18 19:51:52,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:52,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:51:52,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:51:52,883 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:51:52,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:51:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:52,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:51:52,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:51:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:51:53,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:51:53,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834963564] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:53,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:51:53,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-11-18 19:51:53,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148225259] [2022-11-18 19:51:53,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:53,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:51:53,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:53,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:51:53,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:51:53,101 INFO L87 Difference]: Start difference. First operand 111 states and 165 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:53,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:53,220 INFO L93 Difference]: Finished difference Result 227 states and 352 transitions. [2022-11-18 19:51:53,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:51:53,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-18 19:51:53,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:53,222 INFO L225 Difference]: With dead ends: 227 [2022-11-18 19:51:53,222 INFO L226 Difference]: Without dead ends: 149 [2022-11-18 19:51:53,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:51:53,230 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 25 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:53,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 145 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 58 Invalid, 0 Unknown, 78 Unchecked, 0.1s Time] [2022-11-18 19:51:53,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-18 19:51:53,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 124. [2022-11-18 19:51:53,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.4878048780487805) internal successors, (183), 123 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:53,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 183 transitions. [2022-11-18 19:51:53,243 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 183 transitions. Word has length 27 [2022-11-18 19:51:53,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:53,243 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 183 transitions. [2022-11-18 19:51:53,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:53,244 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 183 transitions. [2022-11-18 19:51:53,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-18 19:51:53,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:53,245 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:53,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:51:53,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:51:53,445 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:53,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:53,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1918115782, now seen corresponding path program 1 times [2022-11-18 19:51:53,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:53,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690016130] [2022-11-18 19:51:53,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:53,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 19:51:53,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:53,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690016130] [2022-11-18 19:51:53,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690016130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:53,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:51:53,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:51:53,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176920616] [2022-11-18 19:51:53,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:53,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:51:53,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:53,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:51:53,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:51:53,630 INFO L87 Difference]: Start difference. First operand 124 states and 183 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:53,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:53,844 INFO L93 Difference]: Finished difference Result 332 states and 489 transitions. [2022-11-18 19:51:53,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:51:53,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-18 19:51:53,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:53,846 INFO L225 Difference]: With dead ends: 332 [2022-11-18 19:51:53,846 INFO L226 Difference]: Without dead ends: 241 [2022-11-18 19:51:53,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:51:53,847 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 147 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:53,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 119 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:51:53,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-18 19:51:53,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 146. [2022-11-18 19:51:53,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.4827586206896552) internal successors, (215), 145 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:53,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 215 transitions. [2022-11-18 19:51:53,874 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 215 transitions. Word has length 33 [2022-11-18 19:51:53,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:53,874 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 215 transitions. [2022-11-18 19:51:53,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:53,875 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 215 transitions. [2022-11-18 19:51:53,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-18 19:51:53,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:53,878 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:53,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 19:51:53,878 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:53,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:53,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1013141659, now seen corresponding path program 1 times [2022-11-18 19:51:53,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:53,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608699053] [2022-11-18 19:51:53,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:53,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 19:51:53,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:53,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608699053] [2022-11-18 19:51:53,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608699053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:53,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:51:53,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:51:53,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82264435] [2022-11-18 19:51:53,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:53,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:51:53,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:53,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:51:53,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:51:53,947 INFO L87 Difference]: Start difference. First operand 146 states and 215 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:54,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:54,057 INFO L93 Difference]: Finished difference Result 302 states and 450 transitions. [2022-11-18 19:51:54,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:51:54,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-18 19:51:54,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:54,061 INFO L225 Difference]: With dead ends: 302 [2022-11-18 19:51:54,061 INFO L226 Difference]: Without dead ends: 189 [2022-11-18 19:51:54,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:51:54,062 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 32 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:54,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 77 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:51:54,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-18 19:51:54,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 163. [2022-11-18 19:51:54,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.5123456790123457) internal successors, (245), 162 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:54,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 245 transitions. [2022-11-18 19:51:54,087 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 245 transitions. Word has length 33 [2022-11-18 19:51:54,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:54,087 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 245 transitions. [2022-11-18 19:51:54,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:54,087 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 245 transitions. [2022-11-18 19:51:54,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-18 19:51:54,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:54,090 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:54,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 19:51:54,090 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:54,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:54,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1822488285, now seen corresponding path program 1 times [2022-11-18 19:51:54,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:54,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090671900] [2022-11-18 19:51:54,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:54,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:51:54,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:54,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090671900] [2022-11-18 19:51:54,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090671900] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:51:54,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848897027] [2022-11-18 19:51:54,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:54,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:51:54,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:51:54,295 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:51:54,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:51:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:54,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:51:54,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:51:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 19:51:54,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:51:54,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848897027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:54,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:51:54,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-11-18 19:51:54,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012664523] [2022-11-18 19:51:54,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:54,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:51:54,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:54,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:51:54,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:51:54,490 INFO L87 Difference]: Start difference. First operand 163 states and 245 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:54,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:54,598 INFO L93 Difference]: Finished difference Result 311 states and 468 transitions. [2022-11-18 19:51:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:51:54,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-18 19:51:54,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:54,599 INFO L225 Difference]: With dead ends: 311 [2022-11-18 19:51:54,600 INFO L226 Difference]: Without dead ends: 181 [2022-11-18 19:51:54,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:51:54,603 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 25 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:54,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 145 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 56 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2022-11-18 19:51:54,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-18 19:51:54,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 168. [2022-11-18 19:51:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.4550898203592815) internal successors, (243), 167 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:54,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 243 transitions. [2022-11-18 19:51:54,611 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 243 transitions. Word has length 33 [2022-11-18 19:51:54,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:54,612 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 243 transitions. [2022-11-18 19:51:54,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:54,612 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 243 transitions. [2022-11-18 19:51:54,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-18 19:51:54,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:54,614 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:54,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 19:51:54,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 19:51:54,820 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:54,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:54,821 INFO L85 PathProgramCache]: Analyzing trace with hash -333083289, now seen corresponding path program 1 times [2022-11-18 19:51:54,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:54,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701711887] [2022-11-18 19:51:54,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:54,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:51:55,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:55,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701711887] [2022-11-18 19:51:55,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701711887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:51:55,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015789668] [2022-11-18 19:51:55,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:55,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:51:55,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:51:55,079 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:51:55,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:51:55,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:55,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 19:51:55,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:51:57,457 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:51:57,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:51:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:51:57,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015789668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:51:57,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:51:57,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 10 [2022-11-18 19:51:57,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18759894] [2022-11-18 19:51:57,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:51:57,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:51:57,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:57,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:51:57,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=55, Unknown=1, NotChecked=0, Total=90 [2022-11-18 19:51:57,516 INFO L87 Difference]: Start difference. First operand 168 states and 243 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:58,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:58,159 INFO L93 Difference]: Finished difference Result 437 states and 660 transitions. [2022-11-18 19:51:58,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 19:51:58,160 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-18 19:51:58,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:58,161 INFO L225 Difference]: With dead ends: 437 [2022-11-18 19:51:58,161 INFO L226 Difference]: Without dead ends: 297 [2022-11-18 19:51:58,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=48, Invalid=83, Unknown=1, NotChecked=0, Total=132 [2022-11-18 19:51:58,162 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 309 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:58,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 188 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 314 Invalid, 0 Unknown, 30 Unchecked, 0.6s Time] [2022-11-18 19:51:58,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-18 19:51:58,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 243. [2022-11-18 19:51:58,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.4090909090909092) internal successors, (341), 242 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 341 transitions. [2022-11-18 19:51:58,182 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 341 transitions. Word has length 33 [2022-11-18 19:51:58,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:58,184 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 341 transitions. [2022-11-18 19:51:58,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:58,185 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 341 transitions. [2022-11-18 19:51:58,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-18 19:51:58,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:58,187 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:58,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 19:51:58,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 19:51:58,393 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:58,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:58,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1102774418, now seen corresponding path program 2 times [2022-11-18 19:51:58,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:58,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483761298] [2022-11-18 19:51:58,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:58,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:58,546 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 19:51:58,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:58,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483761298] [2022-11-18 19:51:58,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483761298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:58,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:51:58,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:51:58,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070122868] [2022-11-18 19:51:58,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:58,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:51:58,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:58,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:51:58,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:51:58,548 INFO L87 Difference]: Start difference. First operand 243 states and 341 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:59,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:59,004 INFO L93 Difference]: Finished difference Result 886 states and 1247 transitions. [2022-11-18 19:51:59,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:51:59,005 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-18 19:51:59,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:59,008 INFO L225 Difference]: With dead ends: 886 [2022-11-18 19:51:59,008 INFO L226 Difference]: Without dead ends: 677 [2022-11-18 19:51:59,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:51:59,009 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 222 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:59,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 333 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 19:51:59,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-11-18 19:51:59,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 243. [2022-11-18 19:51:59,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.4090909090909092) internal successors, (341), 242 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:59,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 341 transitions. [2022-11-18 19:51:59,043 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 341 transitions. Word has length 39 [2022-11-18 19:51:59,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:59,043 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 341 transitions. [2022-11-18 19:51:59,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:59,044 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 341 transitions. [2022-11-18 19:51:59,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-18 19:51:59,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:59,044 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:59,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 19:51:59,045 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:59,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:59,045 INFO L85 PathProgramCache]: Analyzing trace with hash 586309563, now seen corresponding path program 1 times [2022-11-18 19:51:59,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:59,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678184076] [2022-11-18 19:51:59,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:59,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:59,205 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 19:51:59,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:59,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678184076] [2022-11-18 19:51:59,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678184076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:59,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:51:59,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:51:59,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040650701] [2022-11-18 19:51:59,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:59,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:51:59,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:59,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:51:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:51:59,209 INFO L87 Difference]: Start difference. First operand 243 states and 341 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:59,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:51:59,685 INFO L93 Difference]: Finished difference Result 864 states and 1220 transitions. [2022-11-18 19:51:59,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:51:59,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-18 19:51:59,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:51:59,688 INFO L225 Difference]: With dead ends: 864 [2022-11-18 19:51:59,689 INFO L226 Difference]: Without dead ends: 660 [2022-11-18 19:51:59,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:51:59,690 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 211 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:51:59,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 373 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 19:51:59,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-11-18 19:51:59,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 243. [2022-11-18 19:51:59,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.4090909090909092) internal successors, (341), 242 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:59,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 341 transitions. [2022-11-18 19:51:59,715 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 341 transitions. Word has length 40 [2022-11-18 19:51:59,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:51:59,715 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 341 transitions. [2022-11-18 19:51:59,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:59,715 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 341 transitions. [2022-11-18 19:51:59,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-18 19:51:59,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:51:59,716 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:59,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 19:51:59,716 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:51:59,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:59,717 INFO L85 PathProgramCache]: Analyzing trace with hash 46140685, now seen corresponding path program 1 times [2022-11-18 19:51:59,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:59,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025253973] [2022-11-18 19:51:59,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:59,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 19:51:59,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:59,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025253973] [2022-11-18 19:51:59,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025253973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:59,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:51:59,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 19:51:59,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007147412] [2022-11-18 19:51:59,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:59,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:51:59,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:59,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:51:59,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:51:59,900 INFO L87 Difference]: Start difference. First operand 243 states and 341 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:00,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:52:00,628 INFO L93 Difference]: Finished difference Result 1077 states and 1519 transitions. [2022-11-18 19:52:00,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:52:00,629 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-18 19:52:00,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:52:00,632 INFO L225 Difference]: With dead ends: 1077 [2022-11-18 19:52:00,633 INFO L226 Difference]: Without dead ends: 873 [2022-11-18 19:52:00,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-18 19:52:00,634 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 317 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:52:00,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 634 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 19:52:00,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-11-18 19:52:00,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 243. [2022-11-18 19:52:00,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.4090909090909092) internal successors, (341), 242 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:00,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 341 transitions. [2022-11-18 19:52:00,666 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 341 transitions. Word has length 41 [2022-11-18 19:52:00,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:52:00,667 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 341 transitions. [2022-11-18 19:52:00,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:00,667 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 341 transitions. [2022-11-18 19:52:00,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-18 19:52:00,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:52:00,668 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:00,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 19:52:00,668 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:52:00,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:00,668 INFO L85 PathProgramCache]: Analyzing trace with hash 118527243, now seen corresponding path program 1 times [2022-11-18 19:52:00,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:00,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676432387] [2022-11-18 19:52:00,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:00,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 19:52:00,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:00,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676432387] [2022-11-18 19:52:00,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676432387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:00,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:00,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 19:52:00,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140635118] [2022-11-18 19:52:00,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:00,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:52:00,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:00,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:52:00,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:52:00,915 INFO L87 Difference]: Start difference. First operand 243 states and 341 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:01,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:52:01,868 INFO L93 Difference]: Finished difference Result 1102 states and 1552 transitions. [2022-11-18 19:52:01,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 19:52:01,869 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-18 19:52:01,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:52:01,872 INFO L225 Difference]: With dead ends: 1102 [2022-11-18 19:52:01,872 INFO L226 Difference]: Without dead ends: 893 [2022-11-18 19:52:01,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:52:01,873 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 447 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:52:01,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 846 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 19:52:01,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-11-18 19:52:01,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 227. [2022-11-18 19:52:01,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.4115044247787611) internal successors, (319), 226 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:01,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 319 transitions. [2022-11-18 19:52:01,913 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 319 transitions. Word has length 41 [2022-11-18 19:52:01,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:52:01,913 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 319 transitions. [2022-11-18 19:52:01,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:01,914 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 319 transitions. [2022-11-18 19:52:01,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-18 19:52:01,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:52:01,914 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-18 19:52:01,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 19:52:01,915 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:52:01,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:01,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2129976584, now seen corresponding path program 1 times [2022-11-18 19:52:01,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:01,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504925476] [2022-11-18 19:52:01,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:01,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 19:52:02,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:02,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504925476] [2022-11-18 19:52:02,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504925476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:52:02,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285918636] [2022-11-18 19:52:02,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:02,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:52:02,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:52:02,137 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:52:02,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:52:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:02,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 19:52:02,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:52:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 19:52:02,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:52:02,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285918636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:02,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:52:02,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-11-18 19:52:02,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184960548] [2022-11-18 19:52:02,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:02,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:52:02,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:02,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:52:02,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:52:02,405 INFO L87 Difference]: Start difference. First operand 227 states and 319 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:02,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:52:02,625 INFO L93 Difference]: Finished difference Result 663 states and 945 transitions. [2022-11-18 19:52:02,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:52:02,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-18 19:52:02,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:52:02,627 INFO L225 Difference]: With dead ends: 663 [2022-11-18 19:52:02,627 INFO L226 Difference]: Without dead ends: 452 [2022-11-18 19:52:02,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:52:02,628 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 64 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:52:02,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 173 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:52:02,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-11-18 19:52:02,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 372. [2022-11-18 19:52:02,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 1.4016172506738545) internal successors, (520), 371 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:02,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 520 transitions. [2022-11-18 19:52:02,665 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 520 transitions. Word has length 46 [2022-11-18 19:52:02,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:52:02,665 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 520 transitions. [2022-11-18 19:52:02,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:02,666 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 520 transitions. [2022-11-18 19:52:02,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-18 19:52:02,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:52:02,667 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-18 19:52:02,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:52:02,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:52:02,872 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:52:02,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:02,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1028751178, now seen corresponding path program 1 times [2022-11-18 19:52:02,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:02,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454424205] [2022-11-18 19:52:02,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:02,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 19:52:03,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:03,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454424205] [2022-11-18 19:52:03,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454424205] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:52:03,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998452227] [2022-11-18 19:52:03,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:03,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:52:03,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:52:03,101 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:52:03,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 19:52:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:03,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 19:52:03,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:52:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 19:52:03,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:52:03,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998452227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:03,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:52:03,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2022-11-18 19:52:03,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127911677] [2022-11-18 19:52:03,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:03,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:52:03,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:03,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:52:03,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-18 19:52:03,522 INFO L87 Difference]: Start difference. First operand 372 states and 520 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:04,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:52:04,214 INFO L93 Difference]: Finished difference Result 1276 states and 1806 transitions. [2022-11-18 19:52:04,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:52:04,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-18 19:52:04,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:52:04,219 INFO L225 Difference]: With dead ends: 1276 [2022-11-18 19:52:04,219 INFO L226 Difference]: Without dead ends: 889 [2022-11-18 19:52:04,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:52:04,221 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 243 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:52:04,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 544 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 19:52:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-11-18 19:52:04,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 674. [2022-11-18 19:52:04,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 1.3655274888558693) internal successors, (919), 673 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:04,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 919 transitions. [2022-11-18 19:52:04,285 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 919 transitions. Word has length 47 [2022-11-18 19:52:04,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:52:04,286 INFO L495 AbstractCegarLoop]: Abstraction has 674 states and 919 transitions. [2022-11-18 19:52:04,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:04,286 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 919 transitions. [2022-11-18 19:52:04,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 19:52:04,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:52:04,287 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-18 19:52:04,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 19:52:04,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 19:52:04,493 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:52:04,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:04,494 INFO L85 PathProgramCache]: Analyzing trace with hash 464495987, now seen corresponding path program 1 times [2022-11-18 19:52:04,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:04,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208611153] [2022-11-18 19:52:04,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:04,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:04,748 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 19:52:04,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:04,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208611153] [2022-11-18 19:52:04,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208611153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:04,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:04,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 19:52:04,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663974792] [2022-11-18 19:52:04,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:04,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:52:04,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:04,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:52:04,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:52:04,750 INFO L87 Difference]: Start difference. First operand 674 states and 919 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:05,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:52:05,759 INFO L93 Difference]: Finished difference Result 2633 states and 3609 transitions. [2022-11-18 19:52:05,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 19:52:05,760 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-18 19:52:05,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:52:05,766 INFO L225 Difference]: With dead ends: 2633 [2022-11-18 19:52:05,766 INFO L226 Difference]: Without dead ends: 2153 [2022-11-18 19:52:05,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:52:05,768 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 391 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:52:05,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 759 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 19:52:05,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2022-11-18 19:52:05,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 658. [2022-11-18 19:52:05,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 1.3729071537290716) internal successors, (902), 657 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:05,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 902 transitions. [2022-11-18 19:52:05,844 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 902 transitions. Word has length 48 [2022-11-18 19:52:05,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:52:05,846 INFO L495 AbstractCegarLoop]: Abstraction has 658 states and 902 transitions. [2022-11-18 19:52:05,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:05,846 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 902 transitions. [2022-11-18 19:52:05,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-18 19:52:05,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:52:05,847 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-18 19:52:05,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-18 19:52:05,848 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:52:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:05,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1918369908, now seen corresponding path program 1 times [2022-11-18 19:52:05,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:05,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535896765] [2022-11-18 19:52:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:05,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 19:52:06,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:06,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535896765] [2022-11-18 19:52:06,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535896765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:06,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:06,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:52:06,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235437420] [2022-11-18 19:52:06,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:06,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:52:06,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:06,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:52:06,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:52:06,004 INFO L87 Difference]: Start difference. First operand 658 states and 902 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:06,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:52:06,322 INFO L93 Difference]: Finished difference Result 1597 states and 2208 transitions. [2022-11-18 19:52:06,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:52:06,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-18 19:52:06,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:52:06,327 INFO L225 Difference]: With dead ends: 1597 [2022-11-18 19:52:06,327 INFO L226 Difference]: Without dead ends: 1086 [2022-11-18 19:52:06,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:52:06,328 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 69 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:52:06,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 196 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:52:06,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2022-11-18 19:52:06,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 927. [2022-11-18 19:52:06,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 1.369330453563715) internal successors, (1268), 926 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1268 transitions. [2022-11-18 19:52:06,420 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1268 transitions. Word has length 50 [2022-11-18 19:52:06,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:52:06,420 INFO L495 AbstractCegarLoop]: Abstraction has 927 states and 1268 transitions. [2022-11-18 19:52:06,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:06,420 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1268 transitions. [2022-11-18 19:52:06,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-18 19:52:06,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:52:06,422 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:06,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-18 19:52:06,422 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:52:06,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:06,423 INFO L85 PathProgramCache]: Analyzing trace with hash 304907087, now seen corresponding path program 1 times [2022-11-18 19:52:06,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:06,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877942338] [2022-11-18 19:52:06,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:06,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 19:52:06,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:06,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877942338] [2022-11-18 19:52:06,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877942338] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:52:06,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522620715] [2022-11-18 19:52:06,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:06,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:52:06,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:52:06,659 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:52:06,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 19:52:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:06,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 19:52:06,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:52:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 19:52:07,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:52:07,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522620715] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:07,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:52:07,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2022-11-18 19:52:07,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387106718] [2022-11-18 19:52:07,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:07,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:52:07,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:07,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:52:07,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-18 19:52:07,263 INFO L87 Difference]: Start difference. First operand 927 states and 1268 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:07,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:52:07,870 INFO L93 Difference]: Finished difference Result 2105 states and 2889 transitions. [2022-11-18 19:52:07,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:52:07,871 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-18 19:52:07,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:52:07,876 INFO L225 Difference]: With dead ends: 2105 [2022-11-18 19:52:07,876 INFO L226 Difference]: Without dead ends: 1584 [2022-11-18 19:52:07,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:52:07,880 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 192 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:52:07,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 318 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 19:52:07,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2022-11-18 19:52:07,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 1322. [2022-11-18 19:52:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 1.3626040878122634) internal successors, (1800), 1321 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:08,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1800 transitions. [2022-11-18 19:52:08,005 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1800 transitions. Word has length 51 [2022-11-18 19:52:08,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:52:08,006 INFO L495 AbstractCegarLoop]: Abstraction has 1322 states and 1800 transitions. [2022-11-18 19:52:08,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:08,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1800 transitions. [2022-11-18 19:52:08,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-18 19:52:08,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:52:08,008 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-18 19:52:08,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 19:52:08,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:52:08,215 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:52:08,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:08,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1008226627, now seen corresponding path program 1 times [2022-11-18 19:52:08,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:08,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971912443] [2022-11-18 19:52:08,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:08,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 19:52:08,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:08,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971912443] [2022-11-18 19:52:08,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971912443] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:52:08,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976814011] [2022-11-18 19:52:08,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:08,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:52:08,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:52:08,509 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:52:08,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 19:52:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:08,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:52:08,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:52:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 19:52:09,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:52:09,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976814011] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:09,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:52:09,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12 [2022-11-18 19:52:09,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709286123] [2022-11-18 19:52:09,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:09,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 19:52:09,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:09,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 19:52:09,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:52:09,087 INFO L87 Difference]: Start difference. First operand 1322 states and 1800 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:11,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:52:11,434 INFO L93 Difference]: Finished difference Result 2624 states and 3568 transitions. [2022-11-18 19:52:11,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 19:52:11,435 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-18 19:52:11,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:52:11,442 INFO L225 Difference]: With dead ends: 2624 [2022-11-18 19:52:11,442 INFO L226 Difference]: Without dead ends: 2118 [2022-11-18 19:52:11,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2022-11-18 19:52:11,451 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 675 mSDsluCounter, 1409 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 1808 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:52:11,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 1808 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-18 19:52:11,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2022-11-18 19:52:11,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 1715. [2022-11-18 19:52:11,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1715 states, 1714 states have (on average 1.3605600933488915) internal successors, (2332), 1714 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:11,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1715 states to 1715 states and 2332 transitions. [2022-11-18 19:52:11,620 INFO L78 Accepts]: Start accepts. Automaton has 1715 states and 2332 transitions. Word has length 52 [2022-11-18 19:52:11,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:52:11,620 INFO L495 AbstractCegarLoop]: Abstraction has 1715 states and 2332 transitions. [2022-11-18 19:52:11,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:11,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1715 states and 2332 transitions. [2022-11-18 19:52:11,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-18 19:52:11,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:52:11,623 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-18 19:52:11,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 19:52:11,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:52:11,830 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:52:11,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:11,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1041161215, now seen corresponding path program 1 times [2022-11-18 19:52:11,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:11,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752444572] [2022-11-18 19:52:11,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:11,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:52:14,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:14,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752444572] [2022-11-18 19:52:14,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752444572] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:52:14,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185799616] [2022-11-18 19:52:14,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:14,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:52:14,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:52:14,563 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:52:14,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d95508fc-4429-457b-bdaf-db61c8981cba/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 19:52:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:27,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-18 19:52:27,327 INFO L286 TraceCheckSpWp]: Computing forward predicates...