./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de52.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de52.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8 --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 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d --- 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-2329fc7 [2022-12-13 18:54:05,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:54:05,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:54:05,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:54:05,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:54:05,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:54:05,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:54:05,371 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:54:05,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:54:05,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:54:05,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:54:05,376 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:54:05,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:54:05,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:54:05,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:54:05,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:54:05,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:54:05,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:54:05,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:54:05,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:54:05,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:54:05,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:54:05,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:54:05,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:54:05,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:54:05,393 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:54:05,393 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:54:05,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:54:05,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:54:05,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:54:05,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:54:05,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:54:05,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:54:05,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:54:05,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:54:05,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:54:05,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:54:05,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:54:05,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:54:05,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:54:05,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:54:05,402 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 18:54:05,422 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:54:05,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:54:05,422 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:54:05,423 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:54:05,423 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:54:05,423 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:54:05,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:54:05,424 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:54:05,424 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:54:05,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:54:05,425 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:54:05,425 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:54:05,425 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:54:05,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:54:05,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 18:54:05,426 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:54:05,426 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 18:54:05,426 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:54:05,426 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 18:54:05,426 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:54:05,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 18:54:05,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:54:05,427 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:54:05,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:54:05,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:54:05,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:54:05,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:54:05,428 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 18:54:05,428 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:54:05,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:54:05,428 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:54:05,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 18:54:05,429 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:54:05,429 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:54:05,429 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:54:05,429 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d [2022-12-13 18:54:05,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:54:05,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:54:05,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:54:05,647 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:54:05,648 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:54:05,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/loops-crafted-1/in-de52.c [2022-12-13 18:54:08,261 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:54:08,446 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:54:08,446 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/sv-benchmarks/c/loops-crafted-1/in-de52.c [2022-12-13 18:54:08,450 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/data/a465dad4a/3db671195ec044ab80efc9a5e52c1e8c/FLAG0106b2a2a [2022-12-13 18:54:08,461 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/data/a465dad4a/3db671195ec044ab80efc9a5e52c1e8c [2022-12-13 18:54:08,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:54:08,464 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:54:08,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:54:08,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:54:08,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:54:08,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:54:08" (1/1) ... [2022-12-13 18:54:08,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ef80425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:54:08, skipping insertion in model container [2022-12-13 18:54:08,469 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:54:08" (1/1) ... [2022-12-13 18:54:08,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:54:08,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:54:08,609 WARN L237 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_dc0816f6-0946-4ae6-8ef5-f455247c796f/sv-benchmarks/c/loops-crafted-1/in-de52.c[368,381] [2022-12-13 18:54:08,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:54:08,629 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:54:08,641 WARN L237 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_dc0816f6-0946-4ae6-8ef5-f455247c796f/sv-benchmarks/c/loops-crafted-1/in-de52.c[368,381] [2022-12-13 18:54:08,645 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:54:08,657 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:54:08,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:54:08 WrapperNode [2022-12-13 18:54:08,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:54:08,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:54:08,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:54:08,658 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:54:08,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:54:08" (1/1) ... [2022-12-13 18:54:08,671 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:54:08" (1/1) ... [2022-12-13 18:54:08,687 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2022-12-13 18:54:08,687 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:54:08,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:54:08,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:54:08,688 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:54:08,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:54:08" (1/1) ... [2022-12-13 18:54:08,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:54:08" (1/1) ... [2022-12-13 18:54:08,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:54:08" (1/1) ... [2022-12-13 18:54:08,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:54:08" (1/1) ... [2022-12-13 18:54:08,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:54:08" (1/1) ... [2022-12-13 18:54:08,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:54:08" (1/1) ... [2022-12-13 18:54:08,705 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:54:08" (1/1) ... [2022-12-13 18:54:08,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:54:08" (1/1) ... [2022-12-13 18:54:08,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:54:08,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:54:08,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:54:08,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:54:08,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:54:08" (1/1) ... [2022-12-13 18:54:08,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:54:08,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:08,733 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:54:08,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:54:08,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 18:54:08,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:54:08,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:54:08,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 18:54:08,824 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:54:08,825 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:54:08,916 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:54:08,921 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:54:08,921 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-13 18:54:08,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:54:08 BoogieIcfgContainer [2022-12-13 18:54:08,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:54:08,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:54:08,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:54:08,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:54:08,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:54:08" (1/3) ... [2022-12-13 18:54:08,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c1c1ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:54:08, skipping insertion in model container [2022-12-13 18:54:08,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:54:08" (2/3) ... [2022-12-13 18:54:08,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c1c1ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:54:08, skipping insertion in model container [2022-12-13 18:54:08,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:54:08" (3/3) ... [2022-12-13 18:54:08,931 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de52.c [2022-12-13 18:54:08,950 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:54:08,950 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 18:54:08,999 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:54:09,006 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;@7e74730d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:54:09,006 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 18:54:09,010 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 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) [2022-12-13 18:54:09,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 18:54:09,017 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:09,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:09,018 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:09,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:09,024 INFO L85 PathProgramCache]: Analyzing trace with hash 62220644, now seen corresponding path program 1 times [2022-12-13 18:54:09,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:09,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209384138] [2022-12-13 18:54:09,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:09,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:54:09,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:09,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209384138] [2022-12-13 18:54:09,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209384138] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:54:09,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:54:09,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:54:09,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115891784] [2022-12-13 18:54:09,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:54:09,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 18:54:09,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:09,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 18:54:09,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 18:54:09,206 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-12-13 18:54:09,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:09,223 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2022-12-13 18:54:09,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 18:54:09,225 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2022-12-13 18:54:09,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:09,233 INFO L225 Difference]: With dead ends: 29 [2022-12-13 18:54:09,233 INFO L226 Difference]: Without dead ends: 12 [2022-12-13 18:54:09,236 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 [2022-12-13 18:54:09,239 INFO L413 NwaCegarLoop]: 20 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, 20 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 [2022-12-13 18:54:09,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:54:09,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-13 18:54:09,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-12-13 18:54:09,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 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) [2022-12-13 18:54:09,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2022-12-13 18:54:09,270 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 11 [2022-12-13 18:54:09,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:09,271 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2022-12-13 18:54:09,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-12-13 18:54:09,271 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2022-12-13 18:54:09,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 18:54:09,272 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:09,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:09,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 18:54:09,273 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:09,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:09,274 INFO L85 PathProgramCache]: Analyzing trace with hash 58526560, now seen corresponding path program 1 times [2022-12-13 18:54:09,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:09,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121558898] [2022-12-13 18:54:09,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:09,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:09,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:54:09,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:09,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121558898] [2022-12-13 18:54:09,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121558898] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:54:09,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:54:09,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 18:54:09,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427593659] [2022-12-13 18:54:09,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:54:09,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:54:09,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:09,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:54:09,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:54:09,456 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-12-13 18:54:09,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:09,514 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2022-12-13 18:54:09,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:54:09,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2022-12-13 18:54:09,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:09,516 INFO L225 Difference]: With dead ends: 27 [2022-12-13 18:54:09,516 INFO L226 Difference]: Without dead ends: 18 [2022-12-13 18:54:09,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:54:09,517 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:09,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 27 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:54:09,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-13 18:54:09,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-12-13 18:54:09,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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) [2022-12-13 18:54:09,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2022-12-13 18:54:09,525 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2022-12-13 18:54:09,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:09,526 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2022-12-13 18:54:09,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-12-13 18:54:09,526 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2022-12-13 18:54:09,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 18:54:09,526 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:09,527 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:09,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 18:54:09,527 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:09,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:09,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1815988777, now seen corresponding path program 1 times [2022-12-13 18:54:09,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:09,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761896098] [2022-12-13 18:54:09,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:09,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:54:09,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:09,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761896098] [2022-12-13 18:54:09,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761896098] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:54:09,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:54:09,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:54:09,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510399367] [2022-12-13 18:54:09,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:54:09,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:54:09,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:09,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:54:09,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:54:09,571 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-12-13 18:54:09,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:09,596 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2022-12-13 18:54:09,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:54:09,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2022-12-13 18:54:09,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:09,597 INFO L225 Difference]: With dead ends: 28 [2022-12-13 18:54:09,597 INFO L226 Difference]: Without dead ends: 22 [2022-12-13 18:54:09,598 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 [2022-12-13 18:54:09,599 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:09,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 20 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:54:09,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-13 18:54:09,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-13 18:54:09,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 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) [2022-12-13 18:54:09,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2022-12-13 18:54:09,609 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 12 [2022-12-13 18:54:09,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:09,609 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2022-12-13 18:54:09,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-12-13 18:54:09,610 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2022-12-13 18:54:09,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 18:54:09,610 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:09,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:09,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 18:54:09,611 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:09,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:09,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1861241306, now seen corresponding path program 1 times [2022-12-13 18:54:09,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:09,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624988238] [2022-12-13 18:54:09,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:09,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:54:09,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:09,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624988238] [2022-12-13 18:54:09,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624988238] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:54:09,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:54:09,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:54:09,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916522828] [2022-12-13 18:54:09,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:54:09,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:54:09,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:09,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:54:09,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:54:09,651 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-12-13 18:54:09,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:09,680 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2022-12-13 18:54:09,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:54:09,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2022-12-13 18:54:09,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:09,682 INFO L225 Difference]: With dead ends: 37 [2022-12-13 18:54:09,682 INFO L226 Difference]: Without dead ends: 27 [2022-12-13 18:54:09,682 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 [2022-12-13 18:54:09,684 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:09,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 19 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:54:09,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-13 18:54:09,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-12-13 18:54:09,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 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) [2022-12-13 18:54:09,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-12-13 18:54:09,698 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 12 [2022-12-13 18:54:09,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:09,698 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-12-13 18:54:09,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-12-13 18:54:09,699 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-12-13 18:54:09,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 18:54:09,699 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:09,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:09,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 18:54:09,700 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:09,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:09,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1947191488, now seen corresponding path program 1 times [2022-12-13 18:54:09,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:09,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527495509] [2022-12-13 18:54:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:09,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:54:09,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:09,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527495509] [2022-12-13 18:54:09,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527495509] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:54:09,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:54:09,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 18:54:09,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767503970] [2022-12-13 18:54:09,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:54:09,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:54:09,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:09,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:54:09,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:54:09,779 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-12-13 18:54:09,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:09,815 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-12-13 18:54:09,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:54:09,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2022-12-13 18:54:09,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:09,816 INFO L225 Difference]: With dead ends: 34 [2022-12-13 18:54:09,816 INFO L226 Difference]: Without dead ends: 23 [2022-12-13 18:54:09,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:54:09,817 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:09,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:54:09,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-13 18:54:09,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-13 18:54:09,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 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) [2022-12-13 18:54:09,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 32 transitions. [2022-12-13 18:54:09,824 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 32 transitions. Word has length 13 [2022-12-13 18:54:09,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:09,825 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 32 transitions. [2022-12-13 18:54:09,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-12-13 18:54:09,825 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2022-12-13 18:54:09,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 18:54:09,825 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:09,825 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:09,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 18:54:09,826 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:09,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:09,826 INFO L85 PathProgramCache]: Analyzing trace with hash 696660059, now seen corresponding path program 1 times [2022-12-13 18:54:09,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:09,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076576185] [2022-12-13 18:54:09,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:09,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:54:09,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:09,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076576185] [2022-12-13 18:54:09,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076576185] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:09,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793230130] [2022-12-13 18:54:09,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:09,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:09,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:09,903 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:09,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 18:54:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:09,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 18:54:09,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:09,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:54:09,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:10,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:54:10,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793230130] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:10,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:54:10,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2022-12-13 18:54:10,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471376792] [2022-12-13 18:54:10,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:54:10,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:54:10,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:10,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:54:10,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:54:10,029 INFO L87 Difference]: Start difference. First operand 23 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-12-13 18:54:10,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:10,056 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2022-12-13 18:54:10,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:54:10,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2022-12-13 18:54:10,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:10,058 INFO L225 Difference]: With dead ends: 29 [2022-12-13 18:54:10,058 INFO L226 Difference]: Without dead ends: 20 [2022-12-13 18:54:10,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:54:10,059 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:10,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 17 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:54:10,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-13 18:54:10,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-13 18:54:10,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 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) [2022-12-13 18:54:10,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2022-12-13 18:54:10,067 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 14 [2022-12-13 18:54:10,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:10,068 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2022-12-13 18:54:10,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-12-13 18:54:10,068 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2022-12-13 18:54:10,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 18:54:10,069 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:10,069 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:10,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 18:54:10,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:10,271 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:10,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:10,272 INFO L85 PathProgramCache]: Analyzing trace with hash 240273083, now seen corresponding path program 1 times [2022-12-13 18:54:10,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:10,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933523946] [2022-12-13 18:54:10,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:10,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:54:10,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:10,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933523946] [2022-12-13 18:54:10,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933523946] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:10,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108891589] [2022-12-13 18:54:10,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:10,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:10,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:10,451 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:10,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 18:54:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:10,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 18:54:10,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:54:10,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:10,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:54:10,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108891589] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:10,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:54:10,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 8 [2022-12-13 18:54:10,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032642899] [2022-12-13 18:54:10,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:54:10,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:54:10,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:10,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:54:10,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:54:10,544 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-12-13 18:54:10,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:10,567 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-12-13 18:54:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:54:10,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2022-12-13 18:54:10,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:10,568 INFO L225 Difference]: With dead ends: 24 [2022-12-13 18:54:10,568 INFO L226 Difference]: Without dead ends: 17 [2022-12-13 18:54:10,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:54:10,569 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:10,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 23 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:54:10,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-13 18:54:10,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-13 18:54:10,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 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) [2022-12-13 18:54:10,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-12-13 18:54:10,575 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 14 [2022-12-13 18:54:10,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:10,575 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-12-13 18:54:10,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-12-13 18:54:10,575 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-12-13 18:54:10,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 18:54:10,576 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:10,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:10,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 18:54:10,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:10,778 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:10,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:10,779 INFO L85 PathProgramCache]: Analyzing trace with hash -601796193, now seen corresponding path program 1 times [2022-12-13 18:54:10,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:10,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064817775] [2022-12-13 18:54:10,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:10,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:54:10,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:10,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064817775] [2022-12-13 18:54:10,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064817775] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:10,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398257259] [2022-12-13 18:54:10,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:10,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:10,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:10,968 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:10,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 18:54:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:11,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 18:54:11,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:54:11,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:54:11,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398257259] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:11,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:11,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-12-13 18:54:11,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909457418] [2022-12-13 18:54:11,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:11,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:54:11,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:11,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:54:11,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:54:11,090 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-12-13 18:54:11,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:11,120 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-12-13 18:54:11,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:54:11,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 15 [2022-12-13 18:54:11,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:11,120 INFO L225 Difference]: With dead ends: 27 [2022-12-13 18:54:11,120 INFO L226 Difference]: Without dead ends: 21 [2022-12-13 18:54:11,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:54:11,121 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:11,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 26 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:54:11,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-13 18:54:11,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-13 18:54:11,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 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) [2022-12-13 18:54:11,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2022-12-13 18:54:11,126 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 15 [2022-12-13 18:54:11,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:11,126 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2022-12-13 18:54:11,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-12-13 18:54:11,126 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2022-12-13 18:54:11,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 18:54:11,127 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:11,127 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:11,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 18:54:11,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:11,328 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:11,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:11,328 INFO L85 PathProgramCache]: Analyzing trace with hash -556543664, now seen corresponding path program 1 times [2022-12-13 18:54:11,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:11,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928712992] [2022-12-13 18:54:11,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:11,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:54:11,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:11,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928712992] [2022-12-13 18:54:11,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928712992] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:11,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838895254] [2022-12-13 18:54:11,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:11,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:11,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:11,425 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:11,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 18:54:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:11,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 18:54:11,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:54:11,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:54:11,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838895254] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:11,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:11,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-13 18:54:11,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78543326] [2022-12-13 18:54:11,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:11,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 18:54:11,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:11,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 18:54:11,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-12-13 18:54:11,657 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2022-12-13 18:54:11,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:11,856 INFO L93 Difference]: Finished difference Result 66 states and 92 transitions. [2022-12-13 18:54:11,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 18:54:11,857 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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 15 [2022-12-13 18:54:11,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:11,858 INFO L225 Difference]: With dead ends: 66 [2022-12-13 18:54:11,858 INFO L226 Difference]: Without dead ends: 49 [2022-12-13 18:54:11,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-12-13 18:54:11,859 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 35 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:11,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 57 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:54:11,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-13 18:54:11,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2022-12-13 18:54:11,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 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) [2022-12-13 18:54:11,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-12-13 18:54:11,868 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 15 [2022-12-13 18:54:11,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:11,869 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-12-13 18:54:11,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2022-12-13 18:54:11,869 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-12-13 18:54:11,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 18:54:11,869 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:11,869 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:11,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 18:54:12,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:12,071 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:12,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:12,072 INFO L85 PathProgramCache]: Analyzing trace with hash -806394657, now seen corresponding path program 1 times [2022-12-13 18:54:12,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:12,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678304239] [2022-12-13 18:54:12,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:12,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:12,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:54:12,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:12,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678304239] [2022-12-13 18:54:12,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678304239] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:12,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308492291] [2022-12-13 18:54:12,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:12,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:12,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:12,288 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:12,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 18:54:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:12,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 18:54:12,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:54:12,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:54:12,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308492291] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:12,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:12,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-12-13 18:54:12,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195742429] [2022-12-13 18:54:12,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:12,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:54:12,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:12,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:54:12,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:54:12,379 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-12-13 18:54:12,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:12,408 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2022-12-13 18:54:12,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:54:12,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 17 [2022-12-13 18:54:12,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:12,410 INFO L225 Difference]: With dead ends: 46 [2022-12-13 18:54:12,410 INFO L226 Difference]: Without dead ends: 28 [2022-12-13 18:54:12,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:54:12,410 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:12,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:54:12,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-13 18:54:12,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-12-13 18:54:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 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) [2022-12-13 18:54:12,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2022-12-13 18:54:12,421 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 17 [2022-12-13 18:54:12,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:12,421 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2022-12-13 18:54:12,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-12-13 18:54:12,421 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2022-12-13 18:54:12,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 18:54:12,422 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:12,422 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:12,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 18:54:12,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 18:54:12,622 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:12,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:12,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1535262302, now seen corresponding path program 2 times [2022-12-13 18:54:12,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:12,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203515978] [2022-12-13 18:54:12,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:12,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:54:12,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:12,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203515978] [2022-12-13 18:54:12,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203515978] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:12,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720694851] [2022-12-13 18:54:12,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:54:12,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:12,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:12,709 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:12,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 18:54:12,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:54:12,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:54:12,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 18:54:12,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:54:12,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:12,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:54:12,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720694851] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:12,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:12,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-12-13 18:54:12,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500291658] [2022-12-13 18:54:12,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:12,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 18:54:12,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:12,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 18:54:12,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-12-13 18:54:12,876 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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) [2022-12-13 18:54:13,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:13,113 INFO L93 Difference]: Finished difference Result 84 states and 115 transitions. [2022-12-13 18:54:13,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 18:54:13,114 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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 17 [2022-12-13 18:54:13,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:13,114 INFO L225 Difference]: With dead ends: 84 [2022-12-13 18:54:13,115 INFO L226 Difference]: Without dead ends: 61 [2022-12-13 18:54:13,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-12-13 18:54:13,116 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:13,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 90 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:54:13,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-12-13 18:54:13,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2022-12-13 18:54:13,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 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) [2022-12-13 18:54:13,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 63 transitions. [2022-12-13 18:54:13,132 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 63 transitions. Word has length 17 [2022-12-13 18:54:13,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:13,132 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 63 transitions. [2022-12-13 18:54:13,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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) [2022-12-13 18:54:13,132 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 63 transitions. [2022-12-13 18:54:13,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 18:54:13,133 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:13,133 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:13,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 18:54:13,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 18:54:13,333 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:13,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:13,334 INFO L85 PathProgramCache]: Analyzing trace with hash 750125673, now seen corresponding path program 2 times [2022-12-13 18:54:13,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:13,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304040475] [2022-12-13 18:54:13,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:13,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:54:13,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:13,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304040475] [2022-12-13 18:54:13,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304040475] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:13,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910507284] [2022-12-13 18:54:13,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:54:13,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:13,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:13,480 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:13,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 18:54:13,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:54:13,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:54:13,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:54:13,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 18:54:13,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 18:54:13,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910507284] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:13,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:13,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2022-12-13 18:54:13,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803719381] [2022-12-13 18:54:13,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:13,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:54:13,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:13,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:54:13,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:54:13,590 INFO L87 Difference]: Start difference. First operand 44 states and 63 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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) [2022-12-13 18:54:13,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:13,981 INFO L93 Difference]: Finished difference Result 77 states and 112 transitions. [2022-12-13 18:54:13,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 18:54:13,981 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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 18 [2022-12-13 18:54:13,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:13,982 INFO L225 Difference]: With dead ends: 77 [2022-12-13 18:54:13,982 INFO L226 Difference]: Without dead ends: 57 [2022-12-13 18:54:13,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2022-12-13 18:54:13,983 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:13,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 64 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:54:13,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-13 18:54:13,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2022-12-13 18:54:13,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 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) [2022-12-13 18:54:13,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2022-12-13 18:54:13,998 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 18 [2022-12-13 18:54:13,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:13,998 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2022-12-13 18:54:13,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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) [2022-12-13 18:54:13,998 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2022-12-13 18:54:13,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 18:54:13,998 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:13,998 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:14,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 18:54:14,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:14,199 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:14,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:14,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1913455152, now seen corresponding path program 3 times [2022-12-13 18:54:14,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:14,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106928718] [2022-12-13 18:54:14,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:14,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 18:54:14,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:14,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106928718] [2022-12-13 18:54:14,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106928718] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:14,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250455263] [2022-12-13 18:54:14,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:54:14,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:14,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:14,278 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:14,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 18:54:14,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 18:54:14,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:54:14,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 18:54:14,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 18:54:14,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:54:14,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250455263] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:14,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:14,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 19 [2022-12-13 18:54:14,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818405053] [2022-12-13 18:54:14,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:14,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 18:54:14,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:14,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 18:54:14,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-12-13 18:54:14,547 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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) [2022-12-13 18:54:15,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:15,831 INFO L93 Difference]: Finished difference Result 137 states and 189 transitions. [2022-12-13 18:54:15,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-13 18:54:15,831 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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 19 [2022-12-13 18:54:15,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:15,832 INFO L225 Difference]: With dead ends: 137 [2022-12-13 18:54:15,832 INFO L226 Difference]: Without dead ends: 98 [2022-12-13 18:54:15,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=443, Invalid=2107, Unknown=0, NotChecked=0, Total=2550 [2022-12-13 18:54:15,833 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 75 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:15,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 199 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 18:54:15,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-12-13 18:54:15,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2022-12-13 18:54:15,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.4179104477611941) internal successors, (95), 67 states have internal predecessors, (95), 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) [2022-12-13 18:54:15,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 95 transitions. [2022-12-13 18:54:15,847 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 95 transitions. Word has length 19 [2022-12-13 18:54:15,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:15,847 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 95 transitions. [2022-12-13 18:54:15,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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) [2022-12-13 18:54:15,847 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 95 transitions. [2022-12-13 18:54:15,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-13 18:54:15,847 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:15,847 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:15,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 18:54:16,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:16,049 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:16,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:16,050 INFO L85 PathProgramCache]: Analyzing trace with hash -92433222, now seen corresponding path program 4 times [2022-12-13 18:54:16,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:16,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408592227] [2022-12-13 18:54:16,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:16,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 18:54:16,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:16,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408592227] [2022-12-13 18:54:16,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408592227] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:16,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350378864] [2022-12-13 18:54:16,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:54:16,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:16,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:16,141 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:16,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 18:54:16,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:54:16,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:54:16,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:54:16,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 18:54:16,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 18:54:16,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350378864] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:16,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:16,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-12-13 18:54:16,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26790843] [2022-12-13 18:54:16,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:16,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:54:16,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:16,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:54:16,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:54:16,235 INFO L87 Difference]: Start difference. First operand 68 states and 95 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2022-12-13 18:54:16,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:16,297 INFO L93 Difference]: Finished difference Result 82 states and 112 transitions. [2022-12-13 18:54:16,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 18:54:16,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 20 [2022-12-13 18:54:16,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:16,298 INFO L225 Difference]: With dead ends: 82 [2022-12-13 18:54:16,298 INFO L226 Difference]: Without dead ends: 70 [2022-12-13 18:54:16,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:54:16,299 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:16,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 31 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:54:16,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-13 18:54:16,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-12-13 18:54:16,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.391304347826087) internal successors, (96), 69 states have internal predecessors, (96), 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) [2022-12-13 18:54:16,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 96 transitions. [2022-12-13 18:54:16,325 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 96 transitions. Word has length 20 [2022-12-13 18:54:16,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:16,325 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 96 transitions. [2022-12-13 18:54:16,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2022-12-13 18:54:16,325 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 96 transitions. [2022-12-13 18:54:16,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-13 18:54:16,326 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:16,326 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:16,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 18:54:16,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:16,528 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:16,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:16,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1336926662, now seen corresponding path program 3 times [2022-12-13 18:54:16,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:16,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056913225] [2022-12-13 18:54:16,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:16,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:54:16,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:16,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056913225] [2022-12-13 18:54:16,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056913225] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:16,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907866312] [2022-12-13 18:54:16,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:54:16,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:16,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:16,674 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:16,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 18:54:16,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 18:54:16,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:54:16,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 18:54:16,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:54:16,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:16,796 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:54:16,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907866312] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:16,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:16,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2022-12-13 18:54:16,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668997795] [2022-12-13 18:54:16,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:16,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 18:54:16,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:16,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 18:54:16,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-13 18:54:16,798 INFO L87 Difference]: Start difference. First operand 70 states and 96 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 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) [2022-12-13 18:54:17,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:17,612 INFO L93 Difference]: Finished difference Result 164 states and 228 transitions. [2022-12-13 18:54:17,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 18:54:17,613 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 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 20 [2022-12-13 18:54:17,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:17,613 INFO L225 Difference]: With dead ends: 164 [2022-12-13 18:54:17,613 INFO L226 Difference]: Without dead ends: 136 [2022-12-13 18:54:17,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=1563, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 18:54:17,614 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 134 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:17,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 181 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 18:54:17,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-12-13 18:54:17,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 93. [2022-12-13 18:54:17,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.3478260869565217) internal successors, (124), 92 states have internal predecessors, (124), 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) [2022-12-13 18:54:17,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2022-12-13 18:54:17,633 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 124 transitions. Word has length 20 [2022-12-13 18:54:17,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:17,633 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 124 transitions. [2022-12-13 18:54:17,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 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) [2022-12-13 18:54:17,633 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 124 transitions. [2022-12-13 18:54:17,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 18:54:17,634 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:17,634 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:17,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 18:54:17,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:17,835 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:17,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:17,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1458344336, now seen corresponding path program 2 times [2022-12-13 18:54:17,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:17,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815646464] [2022-12-13 18:54:17,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:17,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:54:17,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:17,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815646464] [2022-12-13 18:54:17,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815646464] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:17,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056022939] [2022-12-13 18:54:17,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:54:17,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:17,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:17,959 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:17,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 18:54:17,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:54:17,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:54:17,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 18:54:17,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 18:54:18,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 18:54:18,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056022939] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:18,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:18,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2022-12-13 18:54:18,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880069306] [2022-12-13 18:54:18,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:18,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 18:54:18,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:18,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 18:54:18,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-12-13 18:54:18,073 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2022-12-13 18:54:19,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:19,050 INFO L93 Difference]: Finished difference Result 133 states and 181 transitions. [2022-12-13 18:54:19,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-13 18:54:19,051 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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 21 [2022-12-13 18:54:19,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:19,052 INFO L225 Difference]: With dead ends: 133 [2022-12-13 18:54:19,052 INFO L226 Difference]: Without dead ends: 107 [2022-12-13 18:54:19,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=372, Invalid=2708, Unknown=0, NotChecked=0, Total=3080 [2022-12-13 18:54:19,053 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 102 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:19,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 43 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:54:19,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-12-13 18:54:19,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 82. [2022-12-13 18:54:19,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.308641975308642) internal successors, (106), 81 states have internal predecessors, (106), 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) [2022-12-13 18:54:19,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2022-12-13 18:54:19,085 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 21 [2022-12-13 18:54:19,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:19,085 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2022-12-13 18:54:19,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2022-12-13 18:54:19,085 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2022-12-13 18:54:19,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 18:54:19,086 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:19,086 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:19,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 18:54:19,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 18:54:19,286 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:19,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:19,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1455648122, now seen corresponding path program 5 times [2022-12-13 18:54:19,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:19,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301928717] [2022-12-13 18:54:19,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:19,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 18:54:19,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:19,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301928717] [2022-12-13 18:54:19,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301928717] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:19,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925053312] [2022-12-13 18:54:19,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:54:19,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:19,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:19,374 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:19,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 18:54:19,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 18:54:19,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:54:19,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:54:19,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 18:54:19,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 18:54:19,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925053312] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:19,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:19,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-12-13 18:54:19,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593731084] [2022-12-13 18:54:19,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:19,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:54:19,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:19,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:54:19,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:54:19,485 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2022-12-13 18:54:19,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:19,537 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2022-12-13 18:54:19,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:54:19,538 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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 22 [2022-12-13 18:54:19,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:19,538 INFO L225 Difference]: With dead ends: 104 [2022-12-13 18:54:19,538 INFO L226 Difference]: Without dead ends: 80 [2022-12-13 18:54:19,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:54:19,539 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:19,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 38 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:54:19,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-13 18:54:19,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-12-13 18:54:19,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.3164556962025316) internal successors, (104), 79 states have internal predecessors, (104), 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) [2022-12-13 18:54:19,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 104 transitions. [2022-12-13 18:54:19,557 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 104 transitions. Word has length 22 [2022-12-13 18:54:19,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:19,558 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 104 transitions. [2022-12-13 18:54:19,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2022-12-13 18:54:19,558 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 104 transitions. [2022-12-13 18:54:19,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 18:54:19,558 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:19,558 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:19,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 18:54:19,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 18:54:19,759 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:19,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:19,759 INFO L85 PathProgramCache]: Analyzing trace with hash 181444187, now seen corresponding path program 6 times [2022-12-13 18:54:19,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:19,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261873778] [2022-12-13 18:54:19,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:19,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 18:54:19,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:19,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261873778] [2022-12-13 18:54:19,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261873778] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:19,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32238415] [2022-12-13 18:54:19,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 18:54:19,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:19,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:19,894 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:19,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 18:54:19,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 18:54:19,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:54:19,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:54:19,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:19,977 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-13 18:54:19,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-13 18:54:20,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32238415] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:20,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:20,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 17 [2022-12-13 18:54:20,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162719244] [2022-12-13 18:54:20,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:20,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 18:54:20,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:20,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 18:54:20,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-12-13 18:54:20,029 INFO L87 Difference]: Start difference. First operand 80 states and 104 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 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) [2022-12-13 18:54:20,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:20,412 INFO L93 Difference]: Finished difference Result 206 states and 270 transitions. [2022-12-13 18:54:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 18:54:20,412 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 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 22 [2022-12-13 18:54:20,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:20,413 INFO L225 Difference]: With dead ends: 206 [2022-12-13 18:54:20,413 INFO L226 Difference]: Without dead ends: 173 [2022-12-13 18:54:20,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2022-12-13 18:54:20,414 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 92 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:20,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 301 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:54:20,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-12-13 18:54:20,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 83. [2022-12-13 18:54:20,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 82 states have internal predecessors, (104), 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) [2022-12-13 18:54:20,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2022-12-13 18:54:20,435 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 22 [2022-12-13 18:54:20,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:20,436 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2022-12-13 18:54:20,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 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) [2022-12-13 18:54:20,436 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2022-12-13 18:54:20,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 18:54:20,436 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:20,436 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:20,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 18:54:20,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 18:54:20,637 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:20,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:20,639 INFO L85 PathProgramCache]: Analyzing trace with hash 534298912, now seen corresponding path program 3 times [2022-12-13 18:54:20,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:20,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758129991] [2022-12-13 18:54:20,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:20,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:54:20,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:20,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758129991] [2022-12-13 18:54:20,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758129991] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:20,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998469234] [2022-12-13 18:54:20,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:54:20,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:20,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:20,809 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:20,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 18:54:20,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 18:54:20,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:54:20,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 18:54:20,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 18:54:20,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:21,128 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 18:54:21,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998469234] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:21,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:21,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 26 [2022-12-13 18:54:21,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027358876] [2022-12-13 18:54:21,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:21,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 18:54:21,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:21,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 18:54:21,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-12-13 18:54:21,129 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 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) [2022-12-13 18:54:23,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:23,688 INFO L93 Difference]: Finished difference Result 227 states and 303 transitions. [2022-12-13 18:54:23,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-12-13 18:54:23,688 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 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 23 [2022-12-13 18:54:23,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:23,689 INFO L225 Difference]: With dead ends: 227 [2022-12-13 18:54:23,689 INFO L226 Difference]: Without dead ends: 186 [2022-12-13 18:54:23,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=767, Invalid=5395, Unknown=0, NotChecked=0, Total=6162 [2022-12-13 18:54:23,692 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 131 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:23,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 469 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 18:54:23,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-12-13 18:54:23,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 107. [2022-12-13 18:54:23,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.3773584905660377) internal successors, (146), 106 states have internal predecessors, (146), 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) [2022-12-13 18:54:23,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 146 transitions. [2022-12-13 18:54:23,722 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 146 transitions. Word has length 23 [2022-12-13 18:54:23,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:23,722 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 146 transitions. [2022-12-13 18:54:23,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 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) [2022-12-13 18:54:23,722 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 146 transitions. [2022-12-13 18:54:23,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 18:54:23,722 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:23,723 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:23,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 18:54:23,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:23,923 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:23,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:23,924 INFO L85 PathProgramCache]: Analyzing trace with hash -146134359, now seen corresponding path program 4 times [2022-12-13 18:54:23,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:23,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622378984] [2022-12-13 18:54:23,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:23,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:54:24,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:24,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622378984] [2022-12-13 18:54:24,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622378984] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:24,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133895601] [2022-12-13 18:54:24,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:54:24,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:24,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:24,117 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:24,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 18:54:24,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:54:24,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:54:24,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 18:54:24,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 18:54:24,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 18:54:24,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133895601] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:24,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:24,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2022-12-13 18:54:24,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792075020] [2022-12-13 18:54:24,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:24,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 18:54:24,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:24,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 18:54:24,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2022-12-13 18:54:24,257 INFO L87 Difference]: Start difference. First operand 107 states and 146 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 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) [2022-12-13 18:54:27,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:27,285 INFO L93 Difference]: Finished difference Result 212 states and 310 transitions. [2022-12-13 18:54:27,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-13 18:54:27,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 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 24 [2022-12-13 18:54:27,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:27,286 INFO L225 Difference]: With dead ends: 212 [2022-12-13 18:54:27,286 INFO L226 Difference]: Without dead ends: 181 [2022-12-13 18:54:27,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=572, Invalid=4398, Unknown=0, NotChecked=0, Total=4970 [2022-12-13 18:54:27,287 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 182 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:27,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 83 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 18:54:27,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-12-13 18:54:27,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 136. [2022-12-13 18:54:27,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.3555555555555556) internal successors, (183), 135 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) [2022-12-13 18:54:27,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 183 transitions. [2022-12-13 18:54:27,324 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 183 transitions. Word has length 24 [2022-12-13 18:54:27,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:27,325 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 183 transitions. [2022-12-13 18:54:27,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 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) [2022-12-13 18:54:27,325 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 183 transitions. [2022-12-13 18:54:27,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 18:54:27,325 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:27,325 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:27,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-13 18:54:27,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:27,527 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:27,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:27,528 INFO L85 PathProgramCache]: Analyzing trace with hash -703235457, now seen corresponding path program 7 times [2022-12-13 18:54:27,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:27,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519075650] [2022-12-13 18:54:27,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:27,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 18:54:27,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:27,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519075650] [2022-12-13 18:54:27,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519075650] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:27,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391483375] [2022-12-13 18:54:27,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 18:54:27,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:27,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:27,613 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:27,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 18:54:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:27,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 18:54:27,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 18:54:27,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 18:54:27,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391483375] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:27,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:27,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-12-13 18:54:27,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019074936] [2022-12-13 18:54:27,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:27,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:54:27,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:27,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:54:27,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:54:27,714 INFO L87 Difference]: Start difference. First operand 136 states and 183 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2022-12-13 18:54:27,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:27,869 INFO L93 Difference]: Finished difference Result 151 states and 202 transitions. [2022-12-13 18:54:27,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 18:54:27,870 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 [2022-12-13 18:54:27,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:27,870 INFO L225 Difference]: With dead ends: 151 [2022-12-13 18:54:27,870 INFO L226 Difference]: Without dead ends: 138 [2022-12-13 18:54:27,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 18:54:27,871 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:27,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:54:27,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-12-13 18:54:27,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-12-13 18:54:27,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.3430656934306568) internal successors, (184), 137 states have internal predecessors, (184), 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) [2022-12-13 18:54:27,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 184 transitions. [2022-12-13 18:54:27,934 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 184 transitions. Word has length 25 [2022-12-13 18:54:27,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:27,935 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 184 transitions. [2022-12-13 18:54:27,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2022-12-13 18:54:27,935 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 184 transitions. [2022-12-13 18:54:27,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 18:54:27,935 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:27,935 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:27,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 18:54:28,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:28,136 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:28,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:28,136 INFO L85 PathProgramCache]: Analyzing trace with hash -779130386, now seen corresponding path program 4 times [2022-12-13 18:54:28,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:28,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92423192] [2022-12-13 18:54:28,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:28,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 18:54:28,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:28,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92423192] [2022-12-13 18:54:28,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92423192] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:28,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600984190] [2022-12-13 18:54:28,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:54:28,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:28,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:28,279 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:28,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 18:54:28,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:54:28,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:54:28,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 18:54:28,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 18:54:28,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 18:54:28,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600984190] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:28,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:28,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8] total 22 [2022-12-13 18:54:28,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368002647] [2022-12-13 18:54:28,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:28,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 18:54:28,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:28,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 18:54:28,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-12-13 18:54:28,507 INFO L87 Difference]: Start difference. First operand 138 states and 184 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 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) [2022-12-13 18:54:29,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:29,982 INFO L93 Difference]: Finished difference Result 310 states and 409 transitions. [2022-12-13 18:54:29,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-13 18:54:29,983 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 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 [2022-12-13 18:54:29,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:29,985 INFO L225 Difference]: With dead ends: 310 [2022-12-13 18:54:29,985 INFO L226 Difference]: Without dead ends: 244 [2022-12-13 18:54:29,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=318, Invalid=2438, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 18:54:29,987 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 133 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:29,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 386 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 18:54:29,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-12-13 18:54:30,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 147. [2022-12-13 18:54:30,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.3150684931506849) internal successors, (192), 146 states have internal predecessors, (192), 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) [2022-12-13 18:54:30,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 192 transitions. [2022-12-13 18:54:30,034 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 192 transitions. Word has length 25 [2022-12-13 18:54:30,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:30,035 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 192 transitions. [2022-12-13 18:54:30,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 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) [2022-12-13 18:54:30,035 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 192 transitions. [2022-12-13 18:54:30,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 18:54:30,035 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:30,035 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:30,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-13 18:54:30,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 18:54:30,237 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:30,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:30,238 INFO L85 PathProgramCache]: Analyzing trace with hash -2074329332, now seen corresponding path program 5 times [2022-12-13 18:54:30,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:30,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613434031] [2022-12-13 18:54:30,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:30,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:30,381 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 18:54:30,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:30,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613434031] [2022-12-13 18:54:30,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613434031] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:30,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514209824] [2022-12-13 18:54:30,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:54:30,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:30,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:30,382 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:30,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 18:54:30,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 18:54:30,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:54:30,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 18:54:30,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 18:54:30,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:30,919 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 18:54:30,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514209824] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:30,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:30,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 30 [2022-12-13 18:54:30,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372346373] [2022-12-13 18:54:30,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:30,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 18:54:30,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:30,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 18:54:30,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-12-13 18:54:30,921 INFO L87 Difference]: Start difference. First operand 147 states and 192 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 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) [2022-12-13 18:54:33,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:33,838 INFO L93 Difference]: Finished difference Result 289 states and 378 transitions. [2022-12-13 18:54:33,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-13 18:54:33,839 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 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 [2022-12-13 18:54:33,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:33,840 INFO L225 Difference]: With dead ends: 289 [2022-12-13 18:54:33,840 INFO L226 Difference]: Without dead ends: 244 [2022-12-13 18:54:33,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=400, Invalid=3022, Unknown=0, NotChecked=0, Total=3422 [2022-12-13 18:54:33,841 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 169 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:33,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 380 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 18:54:33,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-12-13 18:54:33,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 151. [2022-12-13 18:54:33,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.32) internal successors, (198), 150 states have internal predecessors, (198), 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) [2022-12-13 18:54:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 198 transitions. [2022-12-13 18:54:33,908 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 198 transitions. Word has length 26 [2022-12-13 18:54:33,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:33,908 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 198 transitions. [2022-12-13 18:54:33,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 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) [2022-12-13 18:54:33,908 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 198 transitions. [2022-12-13 18:54:33,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 18:54:33,909 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:33,909 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:33,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 18:54:34,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 18:54:34,109 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:34,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:34,110 INFO L85 PathProgramCache]: Analyzing trace with hash -318710337, now seen corresponding path program 8 times [2022-12-13 18:54:34,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:34,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437398446] [2022-12-13 18:54:34,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:34,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 18:54:34,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:34,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437398446] [2022-12-13 18:54:34,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437398446] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:34,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863827476] [2022-12-13 18:54:34,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:54:34,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:34,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:34,232 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:34,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 18:54:34,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:54:34,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:54:34,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 18:54:34,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 18:54:34,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:34,340 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 18:54:34,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863827476] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:34,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:34,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 8 [2022-12-13 18:54:34,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85926263] [2022-12-13 18:54:34,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:34,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 18:54:34,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:34,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 18:54:34,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:54:34,341 INFO L87 Difference]: Start difference. First operand 151 states and 198 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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) [2022-12-13 18:54:34,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:34,486 INFO L93 Difference]: Finished difference Result 191 states and 258 transitions. [2022-12-13 18:54:34,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:54:34,486 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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 [2022-12-13 18:54:34,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:34,487 INFO L225 Difference]: With dead ends: 191 [2022-12-13 18:54:34,487 INFO L226 Difference]: Without dead ends: 158 [2022-12-13 18:54:34,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:54:34,487 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:34,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 49 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:54:34,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-12-13 18:54:34,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 139. [2022-12-13 18:54:34,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.3333333333333333) internal successors, (184), 138 states have internal predecessors, (184), 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) [2022-12-13 18:54:34,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 184 transitions. [2022-12-13 18:54:34,532 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 184 transitions. Word has length 27 [2022-12-13 18:54:34,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:34,532 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 184 transitions. [2022-12-13 18:54:34,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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) [2022-12-13 18:54:34,532 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 184 transitions. [2022-12-13 18:54:34,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 18:54:34,532 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:34,532 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:34,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-13 18:54:34,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:34,733 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:34,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:34,734 INFO L85 PathProgramCache]: Analyzing trace with hash -831872481, now seen corresponding path program 5 times [2022-12-13 18:54:34,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:34,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708451942] [2022-12-13 18:54:34,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:34,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:34,949 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:54:34,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:34,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708451942] [2022-12-13 18:54:34,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708451942] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:34,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595611375] [2022-12-13 18:54:34,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:54:34,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:34,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:34,951 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:34,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 18:54:35,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 18:54:35,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:54:35,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 18:54:35,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:54:35,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 18:54:35,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595611375] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:35,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:35,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 13] total 33 [2022-12-13 18:54:35,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264749376] [2022-12-13 18:54:35,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:35,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 18:54:35,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:35,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 18:54:35,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 18:54:35,541 INFO L87 Difference]: Start difference. First operand 139 states and 184 transitions. Second operand has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 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) [2022-12-13 18:54:37,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:37,804 INFO L93 Difference]: Finished difference Result 328 states and 490 transitions. [2022-12-13 18:54:37,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-12-13 18:54:37,804 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 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 [2022-12-13 18:54:37,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:37,806 INFO L225 Difference]: With dead ends: 328 [2022-12-13 18:54:37,806 INFO L226 Difference]: Without dead ends: 291 [2022-12-13 18:54:37,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1508, Invalid=4812, Unknown=0, NotChecked=0, Total=6320 [2022-12-13 18:54:37,809 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 236 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:37,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 271 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 18:54:37,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-12-13 18:54:37,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 169. [2022-12-13 18:54:37,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.3869047619047619) internal successors, (233), 168 states have internal predecessors, (233), 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) [2022-12-13 18:54:37,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 233 transitions. [2022-12-13 18:54:37,882 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 233 transitions. Word has length 27 [2022-12-13 18:54:37,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:37,883 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 233 transitions. [2022-12-13 18:54:37,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 states have internal predecessors, (57), 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) [2022-12-13 18:54:37,883 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 233 transitions. [2022-12-13 18:54:37,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 18:54:37,883 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:37,883 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:37,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-13 18:54:38,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 18:54:38,085 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:38,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:38,086 INFO L85 PathProgramCache]: Analyzing trace with hash -329349222, now seen corresponding path program 9 times [2022-12-13 18:54:38,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:38,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135091859] [2022-12-13 18:54:38,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:38,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 18:54:38,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:38,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135091859] [2022-12-13 18:54:38,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135091859] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:38,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215885299] [2022-12-13 18:54:38,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:54:38,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:38,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:38,265 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:38,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 18:54:38,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 18:54:38,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:54:38,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 18:54:38,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 18:54:38,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 18:54:38,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215885299] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:38,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:38,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2022-12-13 18:54:38,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932674050] [2022-12-13 18:54:38,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:38,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 18:54:38,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:38,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 18:54:38,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-12-13 18:54:38,438 INFO L87 Difference]: Start difference. First operand 169 states and 233 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2022-12-13 18:54:38,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:38,710 INFO L93 Difference]: Finished difference Result 213 states and 296 transitions. [2022-12-13 18:54:38,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 18:54:38,711 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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 28 [2022-12-13 18:54:38,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:38,711 INFO L225 Difference]: With dead ends: 213 [2022-12-13 18:54:38,712 INFO L226 Difference]: Without dead ends: 196 [2022-12-13 18:54:38,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-12-13 18:54:38,712 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:38,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 79 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:54:38,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-12-13 18:54:38,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-12-13 18:54:38,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.3692307692307693) internal successors, (267), 195 states have internal predecessors, (267), 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) [2022-12-13 18:54:38,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 267 transitions. [2022-12-13 18:54:38,791 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 267 transitions. Word has length 28 [2022-12-13 18:54:38,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:38,791 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 267 transitions. [2022-12-13 18:54:38,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2022-12-13 18:54:38,791 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 267 transitions. [2022-12-13 18:54:38,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 18:54:38,791 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:38,791 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:38,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-13 18:54:38,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 18:54:38,992 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:38,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:38,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1297921274, now seen corresponding path program 6 times [2022-12-13 18:54:38,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:38,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678782908] [2022-12-13 18:54:38,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:38,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:54:39,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:39,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678782908] [2022-12-13 18:54:39,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678782908] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:39,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534932722] [2022-12-13 18:54:39,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 18:54:39,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:39,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:39,204 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:39,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 18:54:39,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 18:54:39,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:54:39,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 18:54:39,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 18:54:39,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:39,425 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 18:54:39,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534932722] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:39,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:39,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8, 8] total 23 [2022-12-13 18:54:39,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902315278] [2022-12-13 18:54:39,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:39,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 18:54:39,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:39,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 18:54:39,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2022-12-13 18:54:39,426 INFO L87 Difference]: Start difference. First operand 196 states and 267 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2022-12-13 18:54:44,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:44,407 INFO L93 Difference]: Finished difference Result 401 states and 544 transitions. [2022-12-13 18:54:44,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-12-13 18:54:44,408 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 28 [2022-12-13 18:54:44,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:44,409 INFO L225 Difference]: With dead ends: 401 [2022-12-13 18:54:44,409 INFO L226 Difference]: Without dead ends: 316 [2022-12-13 18:54:44,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1904 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=697, Invalid=6443, Unknown=0, NotChecked=0, Total=7140 [2022-12-13 18:54:44,410 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 223 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:44,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 519 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1491 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 18:54:44,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-12-13 18:54:44,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 206. [2022-12-13 18:54:44,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.3365853658536586) internal successors, (274), 205 states have internal predecessors, (274), 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) [2022-12-13 18:54:44,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 274 transitions. [2022-12-13 18:54:44,498 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 274 transitions. Word has length 28 [2022-12-13 18:54:44,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:44,498 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 274 transitions. [2022-12-13 18:54:44,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2022-12-13 18:54:44,498 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 274 transitions. [2022-12-13 18:54:44,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 18:54:44,499 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:44,499 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:44,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-13 18:54:44,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 18:54:44,700 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:44,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:44,701 INFO L85 PathProgramCache]: Analyzing trace with hash 405263290, now seen corresponding path program 6 times [2022-12-13 18:54:44,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:44,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298220860] [2022-12-13 18:54:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:44,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:44,862 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 18:54:44,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:44,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298220860] [2022-12-13 18:54:44,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298220860] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:44,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161375349] [2022-12-13 18:54:44,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 18:54:44,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:44,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:44,863 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:44,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 18:54:44,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 18:54:44,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:54:44,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 18:54:44,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 18:54:45,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 18:54:45,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161375349] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:45,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:45,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 33 [2022-12-13 18:54:45,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035009275] [2022-12-13 18:54:45,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:45,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 18:54:45,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:45,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 18:54:45,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 18:54:45,266 INFO L87 Difference]: Start difference. First operand 206 states and 274 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 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) [2022-12-13 18:54:50,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:54:50,430 INFO L93 Difference]: Finished difference Result 348 states and 449 transitions. [2022-12-13 18:54:50,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-13 18:54:50,431 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 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 30 [2022-12-13 18:54:50,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:54:50,432 INFO L225 Difference]: With dead ends: 348 [2022-12-13 18:54:50,432 INFO L226 Difference]: Without dead ends: 294 [2022-12-13 18:54:50,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=511, Invalid=3911, Unknown=0, NotChecked=0, Total=4422 [2022-12-13 18:54:50,434 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 147 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:54:50,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 647 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 18:54:50,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-12-13 18:54:50,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 198. [2022-12-13 18:54:50,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.3248730964467006) internal successors, (261), 197 states have internal predecessors, (261), 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) [2022-12-13 18:54:50,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 261 transitions. [2022-12-13 18:54:50,571 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 261 transitions. Word has length 30 [2022-12-13 18:54:50,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:54:50,571 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 261 transitions. [2022-12-13 18:54:50,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 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) [2022-12-13 18:54:50,571 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 261 transitions. [2022-12-13 18:54:50,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 18:54:50,571 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:54:50,571 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:54:50,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 18:54:50,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 18:54:50,773 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:54:50,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:54:50,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1895449321, now seen corresponding path program 7 times [2022-12-13 18:54:50,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:54:50,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108261408] [2022-12-13 18:54:50,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:54:50,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:54:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:54:50,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:54:50,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108261408] [2022-12-13 18:54:50,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108261408] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:54:50,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104658854] [2022-12-13 18:54:50,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 18:54:50,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:54:50,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:54:50,995 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:54:50,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 18:54:51,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:54:51,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 18:54:51,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:54:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 18:54:51,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:54:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 18:54:51,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104658854] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:54:51,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:54:51,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2022-12-13 18:54:51,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820813986] [2022-12-13 18:54:51,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:54:51,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 18:54:51,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:54:51,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 18:54:51,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2022-12-13 18:54:51,191 INFO L87 Difference]: Start difference. First operand 198 states and 261 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 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) [2022-12-13 18:55:06,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:55:06,654 INFO L93 Difference]: Finished difference Result 326 states and 448 transitions. [2022-12-13 18:55:06,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-12-13 18:55:06,654 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 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 30 [2022-12-13 18:55:06,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:55:06,656 INFO L225 Difference]: With dead ends: 326 [2022-12-13 18:55:06,656 INFO L226 Difference]: Without dead ends: 285 [2022-12-13 18:55:06,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5392 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=1445, Invalid=15067, Unknown=0, NotChecked=0, Total=16512 [2022-12-13 18:55:06,661 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 244 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 1965 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-13 18:55:06,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 159 Invalid, 2134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1965 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-13 18:55:06,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-12-13 18:55:06,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 214. [2022-12-13 18:55:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.3145539906103287) internal successors, (280), 213 states have internal predecessors, (280), 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) [2022-12-13 18:55:06,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 280 transitions. [2022-12-13 18:55:06,770 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 280 transitions. Word has length 30 [2022-12-13 18:55:06,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:55:06,770 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 280 transitions. [2022-12-13 18:55:06,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 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) [2022-12-13 18:55:06,770 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 280 transitions. [2022-12-13 18:55:06,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 18:55:06,771 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:55:06,771 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:55:06,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-13 18:55:06,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 18:55:06,972 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:55:06,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:55:06,973 INFO L85 PathProgramCache]: Analyzing trace with hash 425527099, now seen corresponding path program 10 times [2022-12-13 18:55:06,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:55:06,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359079445] [2022-12-13 18:55:06,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:55:06,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:55:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:55:07,161 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 18:55:07,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:55:07,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359079445] [2022-12-13 18:55:07,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359079445] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:55:07,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991068626] [2022-12-13 18:55:07,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:55:07,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:55:07,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:55:07,162 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:55:07,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 18:55:07,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:55:07,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:55:07,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 18:55:07,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:55:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 18:55:07,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:55:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-13 18:55:07,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991068626] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:55:07,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:55:07,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 8] total 25 [2022-12-13 18:55:07,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589398048] [2022-12-13 18:55:07,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:55:07,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 18:55:07,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:55:07,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 18:55:07,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-12-13 18:55:07,423 INFO L87 Difference]: Start difference. First operand 214 states and 280 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 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) [2022-12-13 18:55:08,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:55:08,687 INFO L93 Difference]: Finished difference Result 567 states and 739 transitions. [2022-12-13 18:55:08,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 18:55:08,687 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 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 30 [2022-12-13 18:55:08,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:55:08,688 INFO L225 Difference]: With dead ends: 567 [2022-12-13 18:55:08,688 INFO L226 Difference]: Without dead ends: 489 [2022-12-13 18:55:08,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 18:55:08,688 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 283 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 18:55:08,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 699 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 18:55:08,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-12-13 18:55:08,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 226. [2022-12-13 18:55:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.2977777777777777) internal successors, (292), 225 states have internal predecessors, (292), 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) [2022-12-13 18:55:08,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 292 transitions. [2022-12-13 18:55:08,793 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 292 transitions. Word has length 30 [2022-12-13 18:55:08,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:55:08,793 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 292 transitions. [2022-12-13 18:55:08,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 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) [2022-12-13 18:55:08,793 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 292 transitions. [2022-12-13 18:55:08,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-13 18:55:08,794 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:55:08,794 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:55:08,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 18:55:08,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:55:08,995 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:55:08,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:55:08,995 INFO L85 PathProgramCache]: Analyzing trace with hash 268339482, now seen corresponding path program 11 times [2022-12-13 18:55:08,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:55:08,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602726167] [2022-12-13 18:55:08,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:55:08,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:55:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:55:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 18:55:09,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:55:09,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602726167] [2022-12-13 18:55:09,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602726167] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:55:09,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596026111] [2022-12-13 18:55:09,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:55:09,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:55:09,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:55:09,178 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:55:09,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 18:55:09,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 18:55:09,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:55:09,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 18:55:09,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:55:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 18:55:09,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:55:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 18:55:09,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596026111] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:55:09,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:55:09,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2022-12-13 18:55:09,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982770138] [2022-12-13 18:55:09,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:55:09,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 18:55:09,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:55:09,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 18:55:09,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-12-13 18:55:09,430 INFO L87 Difference]: Start difference. First operand 226 states and 292 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2022-12-13 18:55:10,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:55:10,771 INFO L93 Difference]: Finished difference Result 479 states and 688 transitions. [2022-12-13 18:55:10,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 18:55:10,772 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 32 [2022-12-13 18:55:10,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:55:10,773 INFO L225 Difference]: With dead ends: 479 [2022-12-13 18:55:10,773 INFO L226 Difference]: Without dead ends: 435 [2022-12-13 18:55:10,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=1316, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 18:55:10,773 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 149 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 18:55:10,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 99 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 18:55:10,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-12-13 18:55:10,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 381. [2022-12-13 18:55:10,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 1.394736842105263) internal successors, (530), 380 states have internal predecessors, (530), 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) [2022-12-13 18:55:10,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 530 transitions. [2022-12-13 18:55:10,939 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 530 transitions. Word has length 32 [2022-12-13 18:55:10,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:55:10,939 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 530 transitions. [2022-12-13 18:55:10,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2022-12-13 18:55:10,939 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 530 transitions. [2022-12-13 18:55:10,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-13 18:55:10,940 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:55:10,940 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:55:10,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 18:55:11,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:55:11,141 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:55:11,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:55:11,143 INFO L85 PathProgramCache]: Analyzing trace with hash -675287733, now seen corresponding path program 12 times [2022-12-13 18:55:11,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:55:11,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608638815] [2022-12-13 18:55:11,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:55:11,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:55:11,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:55:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 18:55:11,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:55:11,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608638815] [2022-12-13 18:55:11,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608638815] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:55:11,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443186748] [2022-12-13 18:55:11,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 18:55:11,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:55:11,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:55:11,337 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:55:11,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 18:55:11,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 18:55:11,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:55:11,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-13 18:55:11,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:55:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-13 18:55:11,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:55:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 18:55:12,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443186748] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:55:12,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:55:12,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 15] total 38 [2022-12-13 18:55:12,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272846365] [2022-12-13 18:55:12,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:55:12,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 18:55:12,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:55:12,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 18:55:12,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 18:55:12,016 INFO L87 Difference]: Start difference. First operand 381 states and 530 transitions. Second operand has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 38 states have internal predecessors, (65), 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) [2022-12-13 18:55:22,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:55:22,333 INFO L93 Difference]: Finished difference Result 914 states and 1294 transitions. [2022-12-13 18:55:22,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-12-13 18:55:22,333 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 38 states have internal predecessors, (65), 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 32 [2022-12-13 18:55:22,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:55:22,336 INFO L225 Difference]: With dead ends: 914 [2022-12-13 18:55:22,336 INFO L226 Difference]: Without dead ends: 743 [2022-12-13 18:55:22,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6624 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=2440, Invalid=20512, Unknown=0, NotChecked=0, Total=22952 [2022-12-13 18:55:22,338 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 200 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 3077 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 3535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 3077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-13 18:55:22,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1002 Invalid, 3535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 3077 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-13 18:55:22,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-12-13 18:55:22,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 472. [2022-12-13 18:55:22,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 1.4416135881104033) internal successors, (679), 471 states have internal predecessors, (679), 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) [2022-12-13 18:55:22,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 679 transitions. [2022-12-13 18:55:22,571 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 679 transitions. Word has length 32 [2022-12-13 18:55:22,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:55:22,571 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 679 transitions. [2022-12-13 18:55:22,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 38 states have internal predecessors, (65), 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) [2022-12-13 18:55:22,571 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 679 transitions. [2022-12-13 18:55:22,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 18:55:22,571 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:55:22,572 INFO L195 NwaCegarLoop]: trace histogram [11, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:55:22,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-13 18:55:22,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-13 18:55:22,773 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:55:22,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:55:22,774 INFO L85 PathProgramCache]: Analyzing trace with hash -586196048, now seen corresponding path program 7 times [2022-12-13 18:55:22,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:55:22,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319681287] [2022-12-13 18:55:22,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:55:22,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:55:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:55:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 18:55:22,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:55:22,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319681287] [2022-12-13 18:55:22,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319681287] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:55:22,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98508572] [2022-12-13 18:55:22,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 18:55:22,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:55:22,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:55:22,961 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:55:22,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 18:55:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:55:22,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 18:55:23,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:55:23,092 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 18:55:23,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:55:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-13 18:55:23,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98508572] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:55:23,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:55:23,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 10] total 30 [2022-12-13 18:55:23,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470385080] [2022-12-13 18:55:23,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:55:23,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 18:55:23,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:55:23,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 18:55:23,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2022-12-13 18:55:23,258 INFO L87 Difference]: Start difference. First operand 472 states and 679 transitions. Second operand has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 30 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) [2022-12-13 18:55:27,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:55:27,503 INFO L93 Difference]: Finished difference Result 975 states and 1401 transitions. [2022-12-13 18:55:27,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-12-13 18:55:27,503 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 30 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 33 [2022-12-13 18:55:27,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:55:27,507 INFO L225 Difference]: With dead ends: 975 [2022-12-13 18:55:27,507 INFO L226 Difference]: Without dead ends: 794 [2022-12-13 18:55:27,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2158 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=644, Invalid=7546, Unknown=0, NotChecked=0, Total=8190 [2022-12-13 18:55:27,509 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 165 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 1661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 18:55:27,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 996 Invalid, 1661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1521 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 18:55:27,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-12-13 18:55:27,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 554. [2022-12-13 18:55:27,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 1.383363471971067) internal successors, (765), 553 states have internal predecessors, (765), 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) [2022-12-13 18:55:27,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 765 transitions. [2022-12-13 18:55:27,808 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 765 transitions. Word has length 33 [2022-12-13 18:55:27,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:55:27,808 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 765 transitions. [2022-12-13 18:55:27,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 30 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) [2022-12-13 18:55:27,808 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 765 transitions. [2022-12-13 18:55:27,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 18:55:27,809 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:55:27,809 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:55:27,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 18:55:28,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:55:28,010 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:55:28,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:55:28,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1550999073, now seen corresponding path program 8 times [2022-12-13 18:55:28,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:55:28,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970057156] [2022-12-13 18:55:28,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:55:28,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:55:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:55:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 18:55:28,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:55:28,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970057156] [2022-12-13 18:55:28,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970057156] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:55:28,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128593811] [2022-12-13 18:55:28,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:55:28,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:55:28,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:55:28,259 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:55:28,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 18:55:28,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:55:28,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:55:28,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 18:55:28,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:55:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 18:55:28,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:55:28,934 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 18:55:28,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128593811] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:55:28,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:55:28,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 42 [2022-12-13 18:55:28,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68009539] [2022-12-13 18:55:28,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:55:28,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 18:55:28,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:55:28,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 18:55:28,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 18:55:28,936 INFO L87 Difference]: Start difference. First operand 554 states and 765 transitions. Second operand has 42 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 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) [2022-12-13 18:55:52,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:55:52,719 INFO L93 Difference]: Finished difference Result 1554 states and 2105 transitions. [2022-12-13 18:55:52,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2022-12-13 18:55:52,720 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 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 35 [2022-12-13 18:55:52,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:55:52,722 INFO L225 Difference]: With dead ends: 1554 [2022-12-13 18:55:52,722 INFO L226 Difference]: Without dead ends: 1324 [2022-12-13 18:55:52,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24190 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=6620, Invalid=55132, Unknown=0, NotChecked=0, Total=61752 [2022-12-13 18:55:52,725 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 774 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 1945 mSolverCounterSat, 678 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 2623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 678 IncrementalHoareTripleChecker+Valid, 1945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-13 18:55:52,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 502 Invalid, 2623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [678 Valid, 1945 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-12-13 18:55:52,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-12-13 18:55:53,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 772. [2022-12-13 18:55:53,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 1.383916990920882) internal successors, (1067), 771 states have internal predecessors, (1067), 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) [2022-12-13 18:55:53,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1067 transitions. [2022-12-13 18:55:53,147 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1067 transitions. Word has length 35 [2022-12-13 18:55:53,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:55:53,147 INFO L495 AbstractCegarLoop]: Abstraction has 772 states and 1067 transitions. [2022-12-13 18:55:53,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 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) [2022-12-13 18:55:53,147 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1067 transitions. [2022-12-13 18:55:53,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 18:55:53,148 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:55:53,148 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:55:53,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 18:55:53,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-13 18:55:53,349 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:55:53,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:55:53,350 INFO L85 PathProgramCache]: Analyzing trace with hash 794730143, now seen corresponding path program 13 times [2022-12-13 18:55:53,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:55:53,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284760740] [2022-12-13 18:55:53,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:55:53,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:55:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:55:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 18:55:53,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:55:53,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284760740] [2022-12-13 18:55:53,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284760740] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:55:53,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357389539] [2022-12-13 18:55:53,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 18:55:53,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:55:53,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:55:53,596 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:55:53,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 18:55:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:55:53,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 18:55:53,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:55:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 18:55:53,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:55:53,710 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 18:55:53,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357389539] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:55:53,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:55:53,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 12 [2022-12-13 18:55:53,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110538015] [2022-12-13 18:55:53,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:55:53,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:55:53,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:55:53,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:55:53,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:55:53,712 INFO L87 Difference]: Start difference. First operand 772 states and 1067 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 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) [2022-12-13 18:55:54,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:55:54,248 INFO L93 Difference]: Finished difference Result 891 states and 1211 transitions. [2022-12-13 18:55:54,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 18:55:54,248 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 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 37 [2022-12-13 18:55:54,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:55:54,250 INFO L225 Difference]: With dead ends: 891 [2022-12-13 18:55:54,250 INFO L226 Difference]: Without dead ends: 857 [2022-12-13 18:55:54,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:55:54,251 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:55:54,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 93 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:55:54,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-12-13 18:55:54,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 758. [2022-12-13 18:55:54,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 1.3883751651254954) internal successors, (1051), 757 states have internal predecessors, (1051), 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) [2022-12-13 18:55:54,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1051 transitions. [2022-12-13 18:55:54,714 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1051 transitions. Word has length 37 [2022-12-13 18:55:54,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:55:54,714 INFO L495 AbstractCegarLoop]: Abstraction has 758 states and 1051 transitions. [2022-12-13 18:55:54,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 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) [2022-12-13 18:55:54,714 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1051 transitions. [2022-12-13 18:55:54,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 18:55:54,715 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:55:54,715 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:55:54,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 18:55:54,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 18:55:54,916 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:55:54,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:55:54,917 INFO L85 PathProgramCache]: Analyzing trace with hash 364300559, now seen corresponding path program 9 times [2022-12-13 18:55:54,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:55:54,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882137387] [2022-12-13 18:55:54,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:55:54,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:55:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:55:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-13 18:55:55,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:55:55,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882137387] [2022-12-13 18:55:55,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882137387] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:55:55,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403236504] [2022-12-13 18:55:55,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:55:55,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:55:55,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:55:55,128 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:55:55,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 18:55:55,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-13 18:55:55,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:55:55,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 18:55:55,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:55:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-13 18:55:55,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:55:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-13 18:55:55,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403236504] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:55:55,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:55:55,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 38 [2022-12-13 18:55:55,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969768380] [2022-12-13 18:55:55,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:55:55,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 18:55:55,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:55:55,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 18:55:55,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1166, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 18:55:55,699 INFO L87 Difference]: Start difference. First operand 758 states and 1051 transitions. Second operand has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 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) [2022-12-13 18:56:08,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:56:08,443 INFO L93 Difference]: Finished difference Result 1643 states and 2501 transitions. [2022-12-13 18:56:08,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-12-13 18:56:08,443 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 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 37 [2022-12-13 18:56:08,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:56:08,446 INFO L225 Difference]: With dead ends: 1643 [2022-12-13 18:56:08,446 INFO L226 Difference]: Without dead ends: 1498 [2022-12-13 18:56:08,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4892 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=3241, Invalid=14051, Unknown=0, NotChecked=0, Total=17292 [2022-12-13 18:56:08,447 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 333 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 2918 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 3235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 2918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-13 18:56:08,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 589 Invalid, 3235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 2918 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-13 18:56:08,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2022-12-13 18:56:08,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 916. [2022-12-13 18:56:08,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 1.4437158469945355) internal successors, (1321), 915 states have internal predecessors, (1321), 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) [2022-12-13 18:56:08,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1321 transitions. [2022-12-13 18:56:08,999 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1321 transitions. Word has length 37 [2022-12-13 18:56:08,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:56:08,999 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1321 transitions. [2022-12-13 18:56:09,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 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) [2022-12-13 18:56:09,000 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1321 transitions. [2022-12-13 18:56:09,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-13 18:56:09,001 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:56:09,001 INFO L195 NwaCegarLoop]: trace histogram [12, 9, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:56:09,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-13 18:56:09,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:56:09,202 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:56:09,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:56:09,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1349623750, now seen corresponding path program 10 times [2022-12-13 18:56:09,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:56:09,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90764529] [2022-12-13 18:56:09,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:56:09,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:56:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:56:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 18:56:09,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:56:09,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90764529] [2022-12-13 18:56:09,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90764529] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:56:09,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793004545] [2022-12-13 18:56:09,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:56:09,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:56:09,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:56:09,564 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:56:09,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 18:56:09,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:56:09,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:56:09,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 18:56:09,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:56:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 36 proven. 81 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 18:56:09,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:56:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 36 proven. 81 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 18:56:09,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793004545] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:56:09,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:56:09,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12, 12] total 35 [2022-12-13 18:56:09,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598997857] [2022-12-13 18:56:09,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:56:09,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 18:56:09,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:56:09,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 18:56:09,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1114, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 18:56:09,863 INFO L87 Difference]: Start difference. First operand 916 states and 1321 transitions. Second operand has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 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) [2022-12-13 18:57:25,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:57:25,465 INFO L93 Difference]: Finished difference Result 1686 states and 2420 transitions. [2022-12-13 18:57:25,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-12-13 18:57:25,466 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 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 38 [2022-12-13 18:57:25,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:57:25,468 INFO L225 Difference]: With dead ends: 1686 [2022-12-13 18:57:25,468 INFO L226 Difference]: Without dead ends: 1419 [2022-12-13 18:57:25,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11086 ImplicationChecksByTransitivity, 65.5s TimeCoverageRelationStatistics Valid=2526, Invalid=31146, Unknown=0, NotChecked=0, Total=33672 [2022-12-13 18:57:25,470 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 453 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 2995 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 3222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 2995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-12-13 18:57:25,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 817 Invalid, 3222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 2995 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2022-12-13 18:57:25,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2022-12-13 18:57:25,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 822. [2022-12-13 18:57:25,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 1.443361753958587) internal successors, (1185), 821 states have internal predecessors, (1185), 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) [2022-12-13 18:57:25,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1185 transitions. [2022-12-13 18:57:25,982 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1185 transitions. Word has length 38 [2022-12-13 18:57:25,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:57:25,982 INFO L495 AbstractCegarLoop]: Abstraction has 822 states and 1185 transitions. [2022-12-13 18:57:25,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 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) [2022-12-13 18:57:25,983 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1185 transitions. [2022-12-13 18:57:25,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 18:57:25,983 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:57:25,983 INFO L195 NwaCegarLoop]: trace histogram [13, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:57:25,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 18:57:26,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:57:26,185 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:57:26,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:57:26,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1611255643, now seen corresponding path program 11 times [2022-12-13 18:57:26,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:57:26,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098465327] [2022-12-13 18:57:26,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:57:26,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:57:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:57:26,533 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 18:57:26,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:57:26,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098465327] [2022-12-13 18:57:26,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098465327] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:57:26,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388548794] [2022-12-13 18:57:26,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:57:26,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:57:26,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:57:26,535 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:57:26,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 18:57:30,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-12-13 18:57:30,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:57:30,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 18:57:30,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:57:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-13 18:57:31,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:57:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-12-13 18:57:31,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388548794] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:57:31,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:57:31,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 20, 10] total 39 [2022-12-13 18:57:31,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868835042] [2022-12-13 18:57:31,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:57:31,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 18:57:31,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:57:31,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 18:57:31,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 18:57:31,367 INFO L87 Difference]: Start difference. First operand 822 states and 1185 transitions. Second operand has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 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) [2022-12-13 18:57:35,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:57:35,550 INFO L93 Difference]: Finished difference Result 1464 states and 2079 transitions. [2022-12-13 18:57:35,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-13 18:57:35,551 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 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 [2022-12-13 18:57:35,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:57:35,557 INFO L225 Difference]: With dead ends: 1464 [2022-12-13 18:57:35,557 INFO L226 Difference]: Without dead ends: 1240 [2022-12-13 18:57:35,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3140 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1899, Invalid=9443, Unknown=0, NotChecked=0, Total=11342 [2022-12-13 18:57:35,558 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 378 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 2862 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 3018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 2862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:57:35,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 1136 Invalid, 3018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 2862 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 18:57:35,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2022-12-13 18:57:36,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 771. [2022-12-13 18:57:36,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 1.4181818181818182) internal successors, (1092), 770 states have internal predecessors, (1092), 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) [2022-12-13 18:57:36,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1092 transitions. [2022-12-13 18:57:36,069 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1092 transitions. Word has length 40 [2022-12-13 18:57:36,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:57:36,069 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 1092 transitions. [2022-12-13 18:57:36,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 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) [2022-12-13 18:57:36,069 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1092 transitions. [2022-12-13 18:57:36,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 18:57:36,070 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:57:36,071 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:57:36,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-13 18:57:36,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 18:57:36,272 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:57:36,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:57:36,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1674931726, now seen corresponding path program 12 times [2022-12-13 18:57:36,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:57:36,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919558417] [2022-12-13 18:57:36,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:57:36,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:57:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:57:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-13 18:57:36,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:57:36,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919558417] [2022-12-13 18:57:36,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919558417] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:57:36,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240323204] [2022-12-13 18:57:36,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 18:57:36,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:57:36,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:57:36,590 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:57:36,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 18:57:36,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-12-13 18:57:36,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:57:36,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-13 18:57:36,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:57:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-13 18:57:37,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:57:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-13 18:57:37,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240323204] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:57:37,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:57:37,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 52 [2022-12-13 18:57:37,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492326703] [2022-12-13 18:57:37,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:57:37,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-13 18:57:37,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:57:37,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-13 18:57:37,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2231, Unknown=0, NotChecked=0, Total=2652 [2022-12-13 18:57:37,627 INFO L87 Difference]: Start difference. First operand 771 states and 1092 transitions. Second operand has 52 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 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) [2022-12-13 18:59:20,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:59:20,790 INFO L93 Difference]: Finished difference Result 2433 states and 3188 transitions. [2022-12-13 18:59:20,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 440 states. [2022-12-13 18:59:20,791 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 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 [2022-12-13 18:59:20,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:59:20,794 INFO L225 Difference]: With dead ends: 2433 [2022-12-13 18:59:20,794 INFO L226 Difference]: Without dead ends: 2153 [2022-12-13 18:59:20,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 438 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82448 ImplicationChecksByTransitivity, 88.7s TimeCoverageRelationStatistics Valid=17220, Invalid=175940, Unknown=0, NotChecked=0, Total=193160 [2022-12-13 18:59:20,802 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1138 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 4606 mSolverCounterSat, 1141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 5747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1141 IncrementalHoareTripleChecker+Valid, 4606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:59:20,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1138 Valid, 957 Invalid, 5747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1141 Valid, 4606 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time] [2022-12-13 18:59:20,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2022-12-13 18:59:21,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 989. [2022-12-13 18:59:21,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 1.3866396761133604) internal successors, (1370), 988 states have internal predecessors, (1370), 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) [2022-12-13 18:59:21,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1370 transitions. [2022-12-13 18:59:21,471 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1370 transitions. Word has length 41 [2022-12-13 18:59:21,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:59:21,471 INFO L495 AbstractCegarLoop]: Abstraction has 989 states and 1370 transitions. [2022-12-13 18:59:21,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 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) [2022-12-13 18:59:21,472 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1370 transitions. [2022-12-13 18:59:21,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 18:59:21,472 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:59:21,473 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:59:21,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-13 18:59:21,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 18:59:21,674 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:59:21,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:59:21,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1331192646, now seen corresponding path program 14 times [2022-12-13 18:59:21,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:59:21,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442925610] [2022-12-13 18:59:21,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:59:21,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:59:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:59:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 22 proven. 47 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-13 18:59:21,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:59:21,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442925610] [2022-12-13 18:59:21,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442925610] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:59:21,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078495625] [2022-12-13 18:59:21,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:59:21,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:59:21,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:59:21,949 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:59:21,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 18:59:21,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:59:21,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:59:21,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 18:59:21,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:59:22,044 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-13 18:59:22,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:59:22,085 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-13 18:59:22,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078495625] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:59:22,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:59:22,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 14 [2022-12-13 18:59:22,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214883405] [2022-12-13 18:59:22,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:59:22,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 18:59:22,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:59:22,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 18:59:22,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2022-12-13 18:59:22,086 INFO L87 Difference]: Start difference. First operand 989 states and 1370 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 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) [2022-12-13 18:59:23,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:59:23,242 INFO L93 Difference]: Finished difference Result 1274 states and 1741 transitions. [2022-12-13 18:59:23,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 18:59:23,243 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 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 42 [2022-12-13 18:59:23,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:59:23,245 INFO L225 Difference]: With dead ends: 1274 [2022-12-13 18:59:23,246 INFO L226 Difference]: Without dead ends: 1228 [2022-12-13 18:59:23,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2022-12-13 18:59:23,246 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 49 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:59:23,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 107 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:59:23,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2022-12-13 18:59:24,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1062. [2022-12-13 18:59:24,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1061 states have (on average 1.3770028275212065) internal successors, (1461), 1061 states have internal predecessors, (1461), 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) [2022-12-13 18:59:24,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1461 transitions. [2022-12-13 18:59:24,044 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1461 transitions. Word has length 42 [2022-12-13 18:59:24,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:59:24,044 INFO L495 AbstractCegarLoop]: Abstraction has 1062 states and 1461 transitions. [2022-12-13 18:59:24,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 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) [2022-12-13 18:59:24,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1461 transitions. [2022-12-13 18:59:24,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 18:59:24,045 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:59:24,045 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:59:24,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-12-13 18:59:24,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 18:59:24,246 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:59:24,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:59:24,247 INFO L85 PathProgramCache]: Analyzing trace with hash -147614912, now seen corresponding path program 13 times [2022-12-13 18:59:24,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:59:24,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957645618] [2022-12-13 18:59:24,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:59:24,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:59:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:59:24,664 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:59:24,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:59:24,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957645618] [2022-12-13 18:59:24,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957645618] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:59:24,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593570228] [2022-12-13 18:59:24,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 18:59:24,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:59:24,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:59:24,666 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:59:24,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-13 18:59:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:59:24,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 18:59:24,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:59:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-13 18:59:24,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:59:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-13 18:59:25,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593570228] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:59:25,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:59:25,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13, 13] total 36 [2022-12-13 18:59:25,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009004767] [2022-12-13 18:59:25,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:59:25,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 18:59:25,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:59:25,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 18:59:25,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1188, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 18:59:25,031 INFO L87 Difference]: Start difference. First operand 1062 states and 1461 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 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) [2022-12-13 19:01:38,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:04:13,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:04:13,589 INFO L93 Difference]: Finished difference Result 1493 states and 2034 transitions. [2022-12-13 19:04:13,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2022-12-13 19:04:13,589 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 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 43 [2022-12-13 19:04:13,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:04:13,591 INFO L225 Difference]: With dead ends: 1493 [2022-12-13 19:04:13,591 INFO L226 Difference]: Without dead ends: 1352 [2022-12-13 19:04:13,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22678 ImplicationChecksByTransitivity, 272.6s TimeCoverageRelationStatistics Valid=4127, Invalid=58122, Unknown=1, NotChecked=0, Total=62250 [2022-12-13 19:04:13,594 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 531 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 6000 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 6339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 6000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2022-12-13 19:04:13,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 315 Invalid, 6339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 6000 Invalid, 0 Unknown, 0 Unchecked, 14.7s Time] [2022-12-13 19:04:13,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2022-12-13 19:04:14,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 969. [2022-12-13 19:04:14,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 1.375) internal successors, (1331), 968 states have internal predecessors, (1331), 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) [2022-12-13 19:04:14,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1331 transitions. [2022-12-13 19:04:14,274 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1331 transitions. Word has length 43 [2022-12-13 19:04:14,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:04:14,274 INFO L495 AbstractCegarLoop]: Abstraction has 969 states and 1331 transitions. [2022-12-13 19:04:14,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 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) [2022-12-13 19:04:14,274 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1331 transitions. [2022-12-13 19:04:14,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 19:04:14,275 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:04:14,275 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:04:14,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-12-13 19:04:14,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-12-13 19:04:14,476 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:04:14,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:04:14,477 INFO L85 PathProgramCache]: Analyzing trace with hash 24683583, now seen corresponding path program 15 times [2022-12-13 19:04:14,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:04:14,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75100131] [2022-12-13 19:04:14,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:04:14,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:04:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:04:14,692 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-13 19:04:14,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:04:14,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75100131] [2022-12-13 19:04:14,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75100131] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:04:14,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918018600] [2022-12-13 19:04:14,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:04:14,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:04:14,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:04:14,693 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:04:14,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-13 19:04:15,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-13 19:04:15,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:04:15,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 19:04:15,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:04:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-13 19:04:15,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:04:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-13 19:04:15,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918018600] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:04:15,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:04:15,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2022-12-13 19:04:15,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951672318] [2022-12-13 19:04:15,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:04:15,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:04:15,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:04:15,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:04:15,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:04:15,117 INFO L87 Difference]: Start difference. First operand 969 states and 1331 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 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) [2022-12-13 19:04:16,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:04:16,806 INFO L93 Difference]: Finished difference Result 1084 states and 1474 transitions. [2022-12-13 19:04:16,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 19:04:16,807 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 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 45 [2022-12-13 19:04:16,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:04:16,809 INFO L225 Difference]: With dead ends: 1084 [2022-12-13 19:04:16,809 INFO L226 Difference]: Without dead ends: 1067 [2022-12-13 19:04:16,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-12-13 19:04:16,810 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:04:16,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 95 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 19:04:16,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2022-12-13 19:04:17,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1009. [2022-12-13 19:04:17,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 1.375) internal successors, (1386), 1008 states have internal predecessors, (1386), 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) [2022-12-13 19:04:17,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1386 transitions. [2022-12-13 19:04:17,640 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1386 transitions. Word has length 45 [2022-12-13 19:04:17,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:04:17,640 INFO L495 AbstractCegarLoop]: Abstraction has 1009 states and 1386 transitions. [2022-12-13 19:04:17,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 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) [2022-12-13 19:04:17,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1386 transitions. [2022-12-13 19:04:17,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 19:04:17,641 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:04:17,641 INFO L195 NwaCegarLoop]: trace histogram [15, 10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:04:17,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-13 19:04:17,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:04:17,842 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:04:17,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:04:17,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1277411425, now seen corresponding path program 16 times [2022-12-13 19:04:17,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:04:17,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361334460] [2022-12-13 19:04:17,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:04:17,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:04:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:04:18,318 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 19:04:18,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:04:18,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361334460] [2022-12-13 19:04:18,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361334460] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:04:18,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003221564] [2022-12-13 19:04:18,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:04:18,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:04:18,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:04:18,319 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:04:18,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-13 19:04:18,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:04:18,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:04:18,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 19:04:18,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:04:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 63 proven. 92 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-13 19:04:18,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:04:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 63 proven. 92 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-13 19:04:18,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003221564] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:04:18,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:04:18,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 13, 13] total 40 [2022-12-13 19:04:18,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676060136] [2022-12-13 19:04:18,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:04:18,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 19:04:18,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:04:18,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 19:04:18,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1473, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 19:04:18,697 INFO L87 Difference]: Start difference. First operand 1009 states and 1386 transitions. Second operand has 40 states, 40 states have (on average 1.675) internal successors, (67), 40 states have internal predecessors, (67), 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) [2022-12-13 19:06:54,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:06:54,831 INFO L93 Difference]: Finished difference Result 1782 states and 2457 transitions. [2022-12-13 19:06:54,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2022-12-13 19:06:54,832 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.675) internal successors, (67), 40 states have internal predecessors, (67), 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 45 [2022-12-13 19:06:54,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:06:54,834 INFO L225 Difference]: With dead ends: 1782 [2022-12-13 19:06:54,834 INFO L226 Difference]: Without dead ends: 1515 [2022-12-13 19:06:54,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19456 ImplicationChecksByTransitivity, 138.8s TimeCoverageRelationStatistics Valid=3737, Invalid=52194, Unknown=1, NotChecked=0, Total=55932 [2022-12-13 19:06:54,837 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 639 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 4591 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 4901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 4591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2022-12-13 19:06:54,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 1219 Invalid, 4901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 4591 Invalid, 0 Unknown, 0 Unchecked, 15.3s Time] [2022-12-13 19:06:54,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2022-12-13 19:06:55,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 870. [2022-12-13 19:06:55,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.385500575373993) internal successors, (1204), 869 states have internal predecessors, (1204), 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) [2022-12-13 19:06:55,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1204 transitions. [2022-12-13 19:06:55,540 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1204 transitions. Word has length 45 [2022-12-13 19:06:55,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:06:55,540 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 1204 transitions. [2022-12-13 19:06:55,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.675) internal successors, (67), 40 states have internal predecessors, (67), 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) [2022-12-13 19:06:55,540 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1204 transitions. [2022-12-13 19:06:55,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 19:06:55,546 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:06:55,546 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:06:55,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-13 19:06:55,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:06:55,747 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:06:55,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:06:55,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1656001162, now seen corresponding path program 14 times [2022-12-13 19:06:55,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:06:55,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357267294] [2022-12-13 19:06:55,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:06:55,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:06:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:06:56,184 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:06:56,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:06:56,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357267294] [2022-12-13 19:06:56,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357267294] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:06:56,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968024059] [2022-12-13 19:06:56,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:06:56,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:06:56,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:06:56,186 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:06:56,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc0816f6-0946-4ae6-8ef5-f455247c796f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-13 19:06:56,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:06:56,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:06:56,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 19:06:56,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:06:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-13 19:06:56,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:06:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-13 19:06:56,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968024059] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:06:56,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:06:56,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14, 14] total 39 [2022-12-13 19:06:56,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295300720] [2022-12-13 19:06:56,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:06:56,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 19:06:56,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:06:56,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 19:06:56,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1404, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 19:06:56,654 INFO L87 Difference]: Start difference. First operand 870 states and 1204 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 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)