./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label12.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/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_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label12.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/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_0ee92048-68f6-46ed-ab5b-746a4a92745e/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 8d17ef4c86a3b9aaad0f3756316af6b356203f50f5a16d9fd49cf45964daad71 --- 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 21:10:50,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 21:10:50,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 21:10:50,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 21:10:50,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 21:10:50,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 21:10:50,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 21:10:50,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 21:10:50,716 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 21:10:50,717 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 21:10:50,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 21:10:50,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 21:10:50,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 21:10:50,720 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 21:10:50,721 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 21:10:50,722 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 21:10:50,723 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 21:10:50,724 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 21:10:50,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 21:10:50,727 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 21:10:50,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 21:10:50,730 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 21:10:50,731 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 21:10:50,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 21:10:50,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 21:10:50,735 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 21:10:50,736 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 21:10:50,737 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 21:10:50,737 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 21:10:50,738 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 21:10:50,738 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 21:10:50,739 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 21:10:50,740 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 21:10:50,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 21:10:50,741 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 21:10:50,741 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 21:10:50,742 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 21:10:50,742 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 21:10:50,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 21:10:50,743 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 21:10:50,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 21:10:50,745 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 21:10:50,766 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 21:10:50,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 21:10:50,766 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 21:10:50,766 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 21:10:50,767 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 21:10:50,767 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 21:10:50,768 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 21:10:50,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 21:10:50,768 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 21:10:50,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 21:10:50,769 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 21:10:50,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 21:10:50,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 21:10:50,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 21:10:50,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 21:10:50,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 21:10:50,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 21:10:50,770 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 21:10:50,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 21:10:50,770 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 21:10:50,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 21:10:50,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 21:10:50,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 21:10:50,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 21:10:50,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:10:50,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 21:10:50,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 21:10:50,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 21:10:50,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 21:10:50,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 21:10:50,772 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 21:10:50,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 21:10:50,773 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 21:10:50,773 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 21:10:50,773 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 21:10:50,773 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_0ee92048-68f6-46ed-ab5b-746a4a92745e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d17ef4c86a3b9aaad0f3756316af6b356203f50f5a16d9fd49cf45964daad71 [2022-12-13 21:10:50,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 21:10:50,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 21:10:50,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 21:10:50,966 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 21:10:50,967 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 21:10:50,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/eca-rers2012/Problem03_label12.c [2022-12-13 21:10:53,500 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 21:10:53,737 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 21:10:53,737 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/sv-benchmarks/c/eca-rers2012/Problem03_label12.c [2022-12-13 21:10:53,747 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/data/4abbc2a53/e15d5e7eb2944489976bb1cec182ded2/FLAGb4bd49d66 [2022-12-13 21:10:54,055 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/data/4abbc2a53/e15d5e7eb2944489976bb1cec182ded2 [2022-12-13 21:10:54,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 21:10:54,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 21:10:54,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 21:10:54,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 21:10:54,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 21:10:54,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:10:54" (1/1) ... [2022-12-13 21:10:54,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8437ed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:54, skipping insertion in model container [2022-12-13 21:10:54,063 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:10:54" (1/1) ... [2022-12-13 21:10:54,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 21:10:54,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 21:10:54,446 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_0ee92048-68f6-46ed-ab5b-746a4a92745e/sv-benchmarks/c/eca-rers2012/Problem03_label12.c[56222,56235] [2022-12-13 21:10:54,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:10:54,480 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 21:10:54,698 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_0ee92048-68f6-46ed-ab5b-746a4a92745e/sv-benchmarks/c/eca-rers2012/Problem03_label12.c[56222,56235] [2022-12-13 21:10:54,716 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:10:54,733 INFO L208 MainTranslator]: Completed translation [2022-12-13 21:10:54,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:54 WrapperNode [2022-12-13 21:10:54,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 21:10:54,735 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 21:10:54,735 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 21:10:54,735 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 21:10:54,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:54" (1/1) ... [2022-12-13 21:10:54,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:54" (1/1) ... [2022-12-13 21:10:54,835 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-12-13 21:10:54,836 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 21:10:54,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 21:10:54,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 21:10:54,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 21:10:54,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:54" (1/1) ... [2022-12-13 21:10:54,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:54" (1/1) ... [2022-12-13 21:10:54,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:54" (1/1) ... [2022-12-13 21:10:54,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:54" (1/1) ... [2022-12-13 21:10:54,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:54" (1/1) ... [2022-12-13 21:10:54,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:54" (1/1) ... [2022-12-13 21:10:54,884 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:54" (1/1) ... [2022-12-13 21:10:54,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:54" (1/1) ... [2022-12-13 21:10:54,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 21:10:54,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 21:10:54,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 21:10:54,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 21:10:54,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:54" (1/1) ... [2022-12-13 21:10:54,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:10:54,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:10:54,921 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 21:10:54,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 21:10:54,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 21:10:54,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 21:10:54,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 21:10:54,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 21:10:55,022 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 21:10:55,024 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 21:10:56,402 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 21:10:56,409 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 21:10:56,409 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 21:10:56,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:10:56 BoogieIcfgContainer [2022-12-13 21:10:56,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 21:10:56,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 21:10:56,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 21:10:56,415 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 21:10:56,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 09:10:54" (1/3) ... [2022-12-13 21:10:56,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b239f83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:10:56, skipping insertion in model container [2022-12-13 21:10:56,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:10:54" (2/3) ... [2022-12-13 21:10:56,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b239f83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:10:56, skipping insertion in model container [2022-12-13 21:10:56,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:10:56" (3/3) ... [2022-12-13 21:10:56,417 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label12.c [2022-12-13 21:10:56,431 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 21:10:56,431 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 21:10:56,470 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:10:56,475 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;@740eb115, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:10:56,475 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 21:10:56,479 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 21:10:56,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-12-13 21:10:56,488 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:10:56,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:10:56,489 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:10:56,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:10:56,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1237142429, now seen corresponding path program 1 times [2022-12-13 21:10:56,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:10:56,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823127202] [2022-12-13 21:10:56,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:10:56,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:10:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:10:56,995 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 21:10:56,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:10:56,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823127202] [2022-12-13 21:10:56,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823127202] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:10:56,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:10:56,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:10:56,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724300228] [2022-12-13 21:10:56,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:10:57,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:10:57,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:10:57,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:10:57,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:10:57,026 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 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 21:10:57,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:10:57,876 INFO L93 Difference]: Finished difference Result 835 states and 1478 transitions. [2022-12-13 21:10:57,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:10:57,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 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 163 [2022-12-13 21:10:57,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:10:57,887 INFO L225 Difference]: With dead ends: 835 [2022-12-13 21:10:57,887 INFO L226 Difference]: Without dead ends: 456 [2022-12-13 21:10:57,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:10:57,891 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 125 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 21:10:57,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 161 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 21:10:57,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-12-13 21:10:57,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 451. [2022-12-13 21:10:57,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5622222222222222) internal successors, (703), 450 states have internal predecessors, (703), 0 states have call successors, (0), 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 21:10:57,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 703 transitions. [2022-12-13 21:10:57,932 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 703 transitions. Word has length 163 [2022-12-13 21:10:57,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:10:57,932 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 703 transitions. [2022-12-13 21:10:57,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 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 21:10:57,933 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 703 transitions. [2022-12-13 21:10:57,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-13 21:10:57,935 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:10:57,935 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:10:57,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 21:10:57,936 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:10:57,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:10:57,936 INFO L85 PathProgramCache]: Analyzing trace with hash -23109611, now seen corresponding path program 1 times [2022-12-13 21:10:57,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:10:57,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422105943] [2022-12-13 21:10:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:10:57,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:10:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:10:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:10:58,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:10:58,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422105943] [2022-12-13 21:10:58,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422105943] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:10:58,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:10:58,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:10:58,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138759951] [2022-12-13 21:10:58,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:10:58,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:10:58,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:10:58,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:10:58,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:10:58,192 INFO L87 Difference]: Start difference. First operand 451 states and 703 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 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 21:10:58,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:10:58,833 INFO L93 Difference]: Finished difference Result 1340 states and 2094 transitions. [2022-12-13 21:10:58,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:10:58,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 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 169 [2022-12-13 21:10:58,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:10:58,838 INFO L225 Difference]: With dead ends: 1340 [2022-12-13 21:10:58,838 INFO L226 Difference]: Without dead ends: 891 [2022-12-13 21:10:58,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:10:58,840 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 21:10:58,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 154 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 21:10:58,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-12-13 21:10:58,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 887. [2022-12-13 21:10:58,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 1.5474040632054176) internal successors, (1371), 886 states have internal predecessors, (1371), 0 states have call successors, (0), 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 21:10:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1371 transitions. [2022-12-13 21:10:58,876 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1371 transitions. Word has length 169 [2022-12-13 21:10:58,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:10:58,876 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1371 transitions. [2022-12-13 21:10:58,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 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 21:10:58,876 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1371 transitions. [2022-12-13 21:10:58,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-13 21:10:58,881 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:10:58,881 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:10:58,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 21:10:58,882 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:10:58,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:10:58,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1333876663, now seen corresponding path program 1 times [2022-12-13 21:10:58,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:10:58,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787443649] [2022-12-13 21:10:58,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:10:58,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:10:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:10:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:10:59,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:10:59,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787443649] [2022-12-13 21:10:59,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787443649] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:10:59,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:10:59,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:10:59,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794044702] [2022-12-13 21:10:59,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:10:59,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:10:59,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:10:59,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:10:59,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:10:59,145 INFO L87 Difference]: Start difference. First operand 887 states and 1371 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 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 21:10:59,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:10:59,845 INFO L93 Difference]: Finished difference Result 2612 states and 4042 transitions. [2022-12-13 21:10:59,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:10:59,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 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 173 [2022-12-13 21:10:59,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:10:59,852 INFO L225 Difference]: With dead ends: 2612 [2022-12-13 21:10:59,852 INFO L226 Difference]: Without dead ends: 1727 [2022-12-13 21:10:59,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:10:59,854 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 236 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 21:10:59,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 112 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 21:10:59,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2022-12-13 21:10:59,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1725. [2022-12-13 21:10:59,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 1.472737819025522) internal successors, (2539), 1724 states have internal predecessors, (2539), 0 states have call successors, (0), 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 21:10:59,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 2539 transitions. [2022-12-13 21:10:59,880 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 2539 transitions. Word has length 173 [2022-12-13 21:10:59,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:10:59,880 INFO L495 AbstractCegarLoop]: Abstraction has 1725 states and 2539 transitions. [2022-12-13 21:10:59,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 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 21:10:59,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 2539 transitions. [2022-12-13 21:10:59,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-12-13 21:10:59,883 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:10:59,883 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:10:59,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 21:10:59,883 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:10:59,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:10:59,883 INFO L85 PathProgramCache]: Analyzing trace with hash -649474255, now seen corresponding path program 1 times [2022-12-13 21:10:59,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:10:59,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134482367] [2022-12-13 21:10:59,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:10:59,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:10:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 21:11:00,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:11:00,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134482367] [2022-12-13 21:11:00,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134482367] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:11:00,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:11:00,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:11:00,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385722025] [2022-12-13 21:11:00,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:11:00,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:11:00,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:11:00,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:11:00,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:11:00,066 INFO L87 Difference]: Start difference. First operand 1725 states and 2539 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 21:11:00,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:11:00,779 INFO L93 Difference]: Finished difference Result 5073 states and 7473 transitions. [2022-12-13 21:11:00,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:11:00,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 175 [2022-12-13 21:11:00,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:11:00,786 INFO L225 Difference]: With dead ends: 5073 [2022-12-13 21:11:00,786 INFO L226 Difference]: Without dead ends: 3350 [2022-12-13 21:11:00,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:11:00,789 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 214 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 21:11:00,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 194 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 21:11:00,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3350 states. [2022-12-13 21:11:00,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3350 to 3350. [2022-12-13 21:11:00,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3350 states, 3349 states have (on average 1.3114362496267542) internal successors, (4392), 3349 states have internal predecessors, (4392), 0 states have call successors, (0), 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 21:11:00,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 4392 transitions. [2022-12-13 21:11:00,834 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 4392 transitions. Word has length 175 [2022-12-13 21:11:00,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:11:00,834 INFO L495 AbstractCegarLoop]: Abstraction has 3350 states and 4392 transitions. [2022-12-13 21:11:00,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 21:11:00,834 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 4392 transitions. [2022-12-13 21:11:00,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-12-13 21:11:00,837 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:11:00,838 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:11:00,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 21:11:00,838 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:11:00,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:11:00,839 INFO L85 PathProgramCache]: Analyzing trace with hash -281310709, now seen corresponding path program 1 times [2022-12-13 21:11:00,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:11:00,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202995695] [2022-12-13 21:11:00,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:00,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:11:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 21:11:01,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:11:01,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202995695] [2022-12-13 21:11:01,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202995695] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:11:01,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:11:01,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:11:01,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063300323] [2022-12-13 21:11:01,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:11:01,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:11:01,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:11:01,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:11:01,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:11:01,023 INFO L87 Difference]: Start difference. First operand 3350 states and 4392 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 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 21:11:01,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:11:01,722 INFO L93 Difference]: Finished difference Result 9360 states and 12381 transitions. [2022-12-13 21:11:01,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:11:01,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 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 184 [2022-12-13 21:11:01,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:11:01,732 INFO L225 Difference]: With dead ends: 9360 [2022-12-13 21:11:01,732 INFO L226 Difference]: Without dead ends: 6012 [2022-12-13 21:11:01,735 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 21:11:01,736 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 216 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 21:11:01,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 391 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 21:11:01,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6012 states. [2022-12-13 21:11:01,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6012 to 6006. [2022-12-13 21:11:01,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6006 states, 6005 states have (on average 1.2502914238134888) internal successors, (7508), 6005 states have internal predecessors, (7508), 0 states have call successors, (0), 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 21:11:01,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6006 states to 6006 states and 7508 transitions. [2022-12-13 21:11:01,825 INFO L78 Accepts]: Start accepts. Automaton has 6006 states and 7508 transitions. Word has length 184 [2022-12-13 21:11:01,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:11:01,825 INFO L495 AbstractCegarLoop]: Abstraction has 6006 states and 7508 transitions. [2022-12-13 21:11:01,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 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 21:11:01,825 INFO L276 IsEmpty]: Start isEmpty. Operand 6006 states and 7508 transitions. [2022-12-13 21:11:01,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-12-13 21:11:01,831 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:11:01,831 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:11:01,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 21:11:01,831 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:11:01,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:11:01,832 INFO L85 PathProgramCache]: Analyzing trace with hash -319235317, now seen corresponding path program 1 times [2022-12-13 21:11:01,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:11:01,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119377677] [2022-12-13 21:11:01,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:01,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:11:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-13 21:11:02,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:11:02,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119377677] [2022-12-13 21:11:02,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119377677] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:11:02,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:11:02,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:11:02,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145887399] [2022-12-13 21:11:02,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:11:02,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:11:02,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:11:02,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:11:02,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:11:02,188 INFO L87 Difference]: Start difference. First operand 6006 states and 7508 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 21:11:02,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:11:02,812 INFO L93 Difference]: Finished difference Result 17144 states and 21528 transitions. [2022-12-13 21:11:02,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:11:02,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 203 [2022-12-13 21:11:02,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:11:02,835 INFO L225 Difference]: With dead ends: 17144 [2022-12-13 21:11:02,835 INFO L226 Difference]: Without dead ends: 11140 [2022-12-13 21:11:02,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:11:02,841 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 219 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 21:11:02,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 176 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 21:11:02,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11140 states. [2022-12-13 21:11:02,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11140 to 11125. [2022-12-13 21:11:02,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11125 states, 11124 states have (on average 1.2303128371089536) internal successors, (13686), 11124 states have internal predecessors, (13686), 0 states have call successors, (0), 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 21:11:02,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11125 states to 11125 states and 13686 transitions. [2022-12-13 21:11:02,975 INFO L78 Accepts]: Start accepts. Automaton has 11125 states and 13686 transitions. Word has length 203 [2022-12-13 21:11:02,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:11:02,975 INFO L495 AbstractCegarLoop]: Abstraction has 11125 states and 13686 transitions. [2022-12-13 21:11:02,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 21:11:02,975 INFO L276 IsEmpty]: Start isEmpty. Operand 11125 states and 13686 transitions. [2022-12-13 21:11:02,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-12-13 21:11:02,984 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:11:02,984 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:11:02,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 21:11:02,985 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:11:02,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:11:02,985 INFO L85 PathProgramCache]: Analyzing trace with hash 817393068, now seen corresponding path program 1 times [2022-12-13 21:11:02,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:11:02,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363753642] [2022-12-13 21:11:02,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:02,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:11:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:03,174 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 21:11:03,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:11:03,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363753642] [2022-12-13 21:11:03,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363753642] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:11:03,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433744941] [2022-12-13 21:11:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:03,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:11:03,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:11:03,175 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:11:03,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 21:11:03,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:03,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 21:11:03,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:11:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-13 21:11:03,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:11:03,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433744941] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:11:03,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:11:03,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-12-13 21:11:03,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148342451] [2022-12-13 21:11:03,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:11:03,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:11:03,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:11:03,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:11:03,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:11:03,574 INFO L87 Difference]: Start difference. First operand 11125 states and 13686 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 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 21:11:04,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:11:04,305 INFO L93 Difference]: Finished difference Result 31061 states and 38427 transitions. [2022-12-13 21:11:04,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:11:04,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 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 211 [2022-12-13 21:11:04,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:11:04,333 INFO L225 Difference]: With dead ends: 31061 [2022-12-13 21:11:04,333 INFO L226 Difference]: Without dead ends: 19938 [2022-12-13 21:11:04,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:11:04,341 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 97 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 21:11:04,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 164 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 21:11:04,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19938 states. [2022-12-13 21:11:04,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19938 to 19934. [2022-12-13 21:11:04,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19934 states, 19933 states have (on average 1.213465108112176) internal successors, (24188), 19933 states have internal predecessors, (24188), 0 states have call successors, (0), 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 21:11:04,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19934 states to 19934 states and 24188 transitions. [2022-12-13 21:11:04,562 INFO L78 Accepts]: Start accepts. Automaton has 19934 states and 24188 transitions. Word has length 211 [2022-12-13 21:11:04,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:11:04,563 INFO L495 AbstractCegarLoop]: Abstraction has 19934 states and 24188 transitions. [2022-12-13 21:11:04,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 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 21:11:04,563 INFO L276 IsEmpty]: Start isEmpty. Operand 19934 states and 24188 transitions. [2022-12-13 21:11:04,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-12-13 21:11:04,578 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:11:04,578 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:11:04,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 21:11:04,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 21:11:04,780 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:11:04,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:11:04,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2037132949, now seen corresponding path program 1 times [2022-12-13 21:11:04,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:11:04,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312823954] [2022-12-13 21:11:04,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:04,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:11:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 21:11:05,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:11:05,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312823954] [2022-12-13 21:11:05,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312823954] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:11:05,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124260648] [2022-12-13 21:11:05,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:05,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:11:05,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:11:05,072 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:11:05,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 21:11:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:05,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 21:11:05,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:11:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 21:11:05,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:11:05,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124260648] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:11:05,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:11:05,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 21:11:05,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247765868] [2022-12-13 21:11:05,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:11:05,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:11:05,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:11:05,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:11:05,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:11:05,352 INFO L87 Difference]: Start difference. First operand 19934 states and 24188 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 21:11:06,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:11:06,022 INFO L93 Difference]: Finished difference Result 46444 states and 56958 transitions. [2022-12-13 21:11:06,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:11:06,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 214 [2022-12-13 21:11:06,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:11:06,048 INFO L225 Difference]: With dead ends: 46444 [2022-12-13 21:11:06,049 INFO L226 Difference]: Without dead ends: 26512 [2022-12-13 21:11:06,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:11:06,058 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 75 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 21:11:06,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 385 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 21:11:06,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26512 states. [2022-12-13 21:11:06,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26512 to 26446. [2022-12-13 21:11:06,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26446 states, 26445 states have (on average 1.2237095859330687) internal successors, (32361), 26445 states have internal predecessors, (32361), 0 states have call successors, (0), 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 21:11:06,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26446 states to 26446 states and 32361 transitions. [2022-12-13 21:11:06,357 INFO L78 Accepts]: Start accepts. Automaton has 26446 states and 32361 transitions. Word has length 214 [2022-12-13 21:11:06,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:11:06,357 INFO L495 AbstractCegarLoop]: Abstraction has 26446 states and 32361 transitions. [2022-12-13 21:11:06,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 21:11:06,357 INFO L276 IsEmpty]: Start isEmpty. Operand 26446 states and 32361 transitions. [2022-12-13 21:11:06,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-12-13 21:11:06,372 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:11:06,372 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:11:06,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 21:11:06,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 21:11:06,573 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:11:06,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:11:06,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1243125533, now seen corresponding path program 1 times [2022-12-13 21:11:06,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:11:06,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141552526] [2022-12-13 21:11:06,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:06,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:11:06,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 63 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 21:11:06,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:11:06,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141552526] [2022-12-13 21:11:06,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141552526] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:11:06,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889190767] [2022-12-13 21:11:06,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:06,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:11:06,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:11:06,888 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:11:06,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 21:11:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:07,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 21:11:07,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:11:07,068 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 21:11:07,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:11:07,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889190767] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:11:07,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:11:07,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 21:11:07,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999853211] [2022-12-13 21:11:07,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:11:07,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:11:07,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:11:07,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:11:07,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:11:07,070 INFO L87 Difference]: Start difference. First operand 26446 states and 32361 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 21:11:07,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:11:07,936 INFO L93 Difference]: Finished difference Result 70805 states and 87019 transitions. [2022-12-13 21:11:07,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:11:07,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 220 [2022-12-13 21:11:07,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:11:08,015 INFO L225 Difference]: With dead ends: 70805 [2022-12-13 21:11:08,015 INFO L226 Difference]: Without dead ends: 44361 [2022-12-13 21:11:08,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:11:08,041 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 252 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 21:11:08,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 194 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 21:11:08,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44361 states. [2022-12-13 21:11:08,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44361 to 44353. [2022-12-13 21:11:08,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44353 states, 44352 states have (on average 1.203553391053391) internal successors, (53380), 44352 states have internal predecessors, (53380), 0 states have call successors, (0), 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 21:11:08,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44353 states to 44353 states and 53380 transitions. [2022-12-13 21:11:08,470 INFO L78 Accepts]: Start accepts. Automaton has 44353 states and 53380 transitions. Word has length 220 [2022-12-13 21:11:08,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:11:08,470 INFO L495 AbstractCegarLoop]: Abstraction has 44353 states and 53380 transitions. [2022-12-13 21:11:08,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 21:11:08,471 INFO L276 IsEmpty]: Start isEmpty. Operand 44353 states and 53380 transitions. [2022-12-13 21:11:08,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-12-13 21:11:08,489 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:11:08,489 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:11:08,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 21:11:08,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:11:08,691 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:11:08,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:11:08,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1635882939, now seen corresponding path program 1 times [2022-12-13 21:11:08,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:11:08,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764943824] [2022-12-13 21:11:08,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:08,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:11:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 21:11:08,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:11:08,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764943824] [2022-12-13 21:11:08,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764943824] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:11:08,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:11:08,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:11:08,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916764981] [2022-12-13 21:11:08,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:11:08,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:11:08,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:11:08,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:11:08,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:11:08,935 INFO L87 Difference]: Start difference. First operand 44353 states and 53380 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 21:11:09,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:11:09,862 INFO L93 Difference]: Finished difference Result 101359 states and 122628 transitions. [2022-12-13 21:11:09,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:11:09,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 232 [2022-12-13 21:11:09,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:11:09,925 INFO L225 Difference]: With dead ends: 101359 [2022-12-13 21:11:09,925 INFO L226 Difference]: Without dead ends: 57414 [2022-12-13 21:11:09,947 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 21:11:09,947 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 173 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 21:11:09,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 390 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 21:11:09,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57414 states. [2022-12-13 21:11:10,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57414 to 57140. [2022-12-13 21:11:10,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57140 states, 57139 states have (on average 1.1763419030784579) internal successors, (67215), 57139 states have internal predecessors, (67215), 0 states have call successors, (0), 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 21:11:10,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57140 states to 57140 states and 67215 transitions. [2022-12-13 21:11:10,615 INFO L78 Accepts]: Start accepts. Automaton has 57140 states and 67215 transitions. Word has length 232 [2022-12-13 21:11:10,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:11:10,615 INFO L495 AbstractCegarLoop]: Abstraction has 57140 states and 67215 transitions. [2022-12-13 21:11:10,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 21:11:10,616 INFO L276 IsEmpty]: Start isEmpty. Operand 57140 states and 67215 transitions. [2022-12-13 21:11:10,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-12-13 21:11:10,638 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:11:10,639 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:11:10,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 21:11:10,639 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:11:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:11:10,639 INFO L85 PathProgramCache]: Analyzing trace with hash -895747558, now seen corresponding path program 1 times [2022-12-13 21:11:10,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:11:10,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257669021] [2022-12-13 21:11:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:10,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:11:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:10,911 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 21:11:10,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:11:10,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257669021] [2022-12-13 21:11:10,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257669021] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:11:10,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:11:10,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:11:10,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572105731] [2022-12-13 21:11:10,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:11:10,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:11:10,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:11:10,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:11:10,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:11:10,914 INFO L87 Difference]: Start difference. First operand 57140 states and 67215 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 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 21:11:11,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:11:11,751 INFO L93 Difference]: Finished difference Result 133485 states and 158266 transitions. [2022-12-13 21:11:11,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:11:11,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 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 244 [2022-12-13 21:11:11,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:11:11,820 INFO L225 Difference]: With dead ends: 133485 [2022-12-13 21:11:11,820 INFO L226 Difference]: Without dead ends: 76956 [2022-12-13 21:11:11,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:11:11,898 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 171 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 21:11:11,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 237 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 21:11:11,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76956 states. [2022-12-13 21:11:12,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76956 to 76881. [2022-12-13 21:11:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76881 states, 76880 states have (on average 1.189646201873049) internal successors, (91460), 76880 states have internal predecessors, (91460), 0 states have call successors, (0), 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 21:11:12,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76881 states to 76881 states and 91460 transitions. [2022-12-13 21:11:12,712 INFO L78 Accepts]: Start accepts. Automaton has 76881 states and 91460 transitions. Word has length 244 [2022-12-13 21:11:12,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:11:12,712 INFO L495 AbstractCegarLoop]: Abstraction has 76881 states and 91460 transitions. [2022-12-13 21:11:12,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 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 21:11:12,712 INFO L276 IsEmpty]: Start isEmpty. Operand 76881 states and 91460 transitions. [2022-12-13 21:11:12,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-12-13 21:11:12,762 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:11:12,762 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:11:12,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 21:11:12,762 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:11:12,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:11:12,763 INFO L85 PathProgramCache]: Analyzing trace with hash 415824609, now seen corresponding path program 1 times [2022-12-13 21:11:12,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:11:12,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857478424] [2022-12-13 21:11:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:12,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:11:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 101 proven. 6 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-13 21:11:13,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:11:13,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857478424] [2022-12-13 21:11:13,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857478424] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:11:13,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854568316] [2022-12-13 21:11:13,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:13,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:11:13,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:11:13,122 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:11:13,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 21:11:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:13,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 21:11:13,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:11:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 21:11:13,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:11:13,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854568316] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:11:13,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:11:13,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 21:11:13,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111540206] [2022-12-13 21:11:13,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:11:13,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:11:13,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:11:13,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:11:13,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:11:13,389 INFO L87 Difference]: Start difference. First operand 76881 states and 91460 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 21:11:14,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:11:14,030 INFO L93 Difference]: Finished difference Result 199557 states and 237436 transitions. [2022-12-13 21:11:14,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:11:14,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 248 [2022-12-13 21:11:14,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:11:14,160 INFO L225 Difference]: With dead ends: 199557 [2022-12-13 21:11:14,160 INFO L226 Difference]: Without dead ends: 123693 [2022-12-13 21:11:14,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:11:14,203 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 303 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 21:11:14,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 913 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 21:11:14,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123693 states. [2022-12-13 21:11:15,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123693 to 123285. [2022-12-13 21:11:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123285 states, 123284 states have (on average 1.1730475974173453) internal successors, (144618), 123284 states have internal predecessors, (144618), 0 states have call successors, (0), 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 21:11:15,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123285 states to 123285 states and 144618 transitions. [2022-12-13 21:11:15,641 INFO L78 Accepts]: Start accepts. Automaton has 123285 states and 144618 transitions. Word has length 248 [2022-12-13 21:11:15,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:11:15,642 INFO L495 AbstractCegarLoop]: Abstraction has 123285 states and 144618 transitions. [2022-12-13 21:11:15,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 21:11:15,642 INFO L276 IsEmpty]: Start isEmpty. Operand 123285 states and 144618 transitions. [2022-12-13 21:11:15,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-12-13 21:11:15,681 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:11:15,681 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:11:15,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 21:11:15,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:11:15,884 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:11:15,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:11:15,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1977088340, now seen corresponding path program 1 times [2022-12-13 21:11:15,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:11:15,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689131756] [2022-12-13 21:11:15,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:15,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:11:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 93 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-13 21:11:16,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:11:16,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689131756] [2022-12-13 21:11:16,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689131756] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:11:16,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689857691] [2022-12-13 21:11:16,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:16,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:11:16,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:11:16,142 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:11:16,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 21:11:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:16,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 21:11:16,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:11:16,315 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-13 21:11:16,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:11:16,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689857691] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:11:16,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:11:16,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-12-13 21:11:16,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951674710] [2022-12-13 21:11:16,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:11:16,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:11:16,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:11:16,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:11:16,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:11:16,317 INFO L87 Difference]: Start difference. First operand 123285 states and 144618 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 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 21:11:17,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:11:17,222 INFO L93 Difference]: Finished difference Result 238726 states and 280218 transitions. [2022-12-13 21:11:17,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:11:17,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 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) Word has length 248 [2022-12-13 21:11:17,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:11:17,353 INFO L225 Difference]: With dead ends: 238726 [2022-12-13 21:11:17,353 INFO L226 Difference]: Without dead ends: 116458 [2022-12-13 21:11:17,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:11:17,411 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 308 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 21:11:17,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 21:11:17,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116458 states. [2022-12-13 21:11:18,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116458 to 116458. [2022-12-13 21:11:18,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116458 states, 116457 states have (on average 1.1661471616132992) internal successors, (135806), 116457 states have internal predecessors, (135806), 0 states have call successors, (0), 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 21:11:18,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116458 states to 116458 states and 135806 transitions. [2022-12-13 21:11:18,837 INFO L78 Accepts]: Start accepts. Automaton has 116458 states and 135806 transitions. Word has length 248 [2022-12-13 21:11:18,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:11:18,837 INFO L495 AbstractCegarLoop]: Abstraction has 116458 states and 135806 transitions. [2022-12-13 21:11:18,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 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 21:11:18,837 INFO L276 IsEmpty]: Start isEmpty. Operand 116458 states and 135806 transitions. [2022-12-13 21:11:18,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-12-13 21:11:18,869 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:11:18,870 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:11:18,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 21:11:19,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 21:11:19,072 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:11:19,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:11:19,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1034228266, now seen corresponding path program 1 times [2022-12-13 21:11:19,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:11:19,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814005472] [2022-12-13 21:11:19,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:19,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:11:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:11:19,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:11:19,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814005472] [2022-12-13 21:11:19,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814005472] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:11:19,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:11:19,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:11:19,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847732314] [2022-12-13 21:11:19,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:11:19,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:11:19,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:11:19,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:11:19,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:11:19,414 INFO L87 Difference]: Start difference. First operand 116458 states and 135806 transitions. Second operand has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 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 21:11:20,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:11:20,600 INFO L93 Difference]: Finished difference Result 231139 states and 269645 transitions. [2022-12-13 21:11:20,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:11:20,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 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 248 [2022-12-13 21:11:20,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:11:20,716 INFO L225 Difference]: With dead ends: 231139 [2022-12-13 21:11:20,716 INFO L226 Difference]: Without dead ends: 115698 [2022-12-13 21:11:20,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:11:20,765 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 392 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 21:11:20,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 106 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 21:11:20,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115698 states. [2022-12-13 21:11:21,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115698 to 112350. [2022-12-13 21:11:21,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112350 states, 112349 states have (on average 1.15851498455705) internal successors, (130158), 112349 states have internal predecessors, (130158), 0 states have call successors, (0), 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 21:11:22,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112350 states to 112350 states and 130158 transitions. [2022-12-13 21:11:22,068 INFO L78 Accepts]: Start accepts. Automaton has 112350 states and 130158 transitions. Word has length 248 [2022-12-13 21:11:22,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:11:22,068 INFO L495 AbstractCegarLoop]: Abstraction has 112350 states and 130158 transitions. [2022-12-13 21:11:22,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 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 21:11:22,068 INFO L276 IsEmpty]: Start isEmpty. Operand 112350 states and 130158 transitions. [2022-12-13 21:11:22,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-12-13 21:11:22,106 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:11:22,107 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:11:22,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 21:11:22,107 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:11:22,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:11:22,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1955164033, now seen corresponding path program 1 times [2022-12-13 21:11:22,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:11:22,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625615426] [2022-12-13 21:11:22,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:22,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:11:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-13 21:11:22,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:11:22,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625615426] [2022-12-13 21:11:22,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625615426] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:11:22,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225258901] [2022-12-13 21:11:22,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:22,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:11:22,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:11:22,448 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:11:22,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 21:11:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:22,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 21:11:22,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:11:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-13 21:11:22,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:11:22,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225258901] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:11:22,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:11:22,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 21:11:22,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385079222] [2022-12-13 21:11:22,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:11:22,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:11:22,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:11:22,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:11:22,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 21:11:22,700 INFO L87 Difference]: Start difference. First operand 112350 states and 130158 transitions. Second operand has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 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 21:11:24,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:11:24,326 INFO L93 Difference]: Finished difference Result 303695 states and 351773 transitions. [2022-12-13 21:11:24,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:11:24,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 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 255 [2022-12-13 21:11:24,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:11:24,513 INFO L225 Difference]: With dead ends: 303695 [2022-12-13 21:11:24,513 INFO L226 Difference]: Without dead ends: 192362 [2022-12-13 21:11:24,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 21:11:24,553 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 528 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 21:11:24,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 485 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 21:11:24,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192362 states. [2022-12-13 21:11:26,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192362 to 166686. [2022-12-13 21:11:26,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166686 states, 166685 states have (on average 1.159018507964124) internal successors, (193191), 166685 states have internal predecessors, (193191), 0 states have call successors, (0), 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 21:11:26,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166686 states to 166686 states and 193191 transitions. [2022-12-13 21:11:26,514 INFO L78 Accepts]: Start accepts. Automaton has 166686 states and 193191 transitions. Word has length 255 [2022-12-13 21:11:26,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:11:26,514 INFO L495 AbstractCegarLoop]: Abstraction has 166686 states and 193191 transitions. [2022-12-13 21:11:26,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 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 21:11:26,514 INFO L276 IsEmpty]: Start isEmpty. Operand 166686 states and 193191 transitions. [2022-12-13 21:11:26,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-12-13 21:11:26,539 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:11:26,539 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:11:26,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 21:11:26,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 21:11:26,742 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:11:26,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:11:26,743 INFO L85 PathProgramCache]: Analyzing trace with hash -216744641, now seen corresponding path program 1 times [2022-12-13 21:11:26,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:11:26,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583489461] [2022-12-13 21:11:26,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:26,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:11:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-13 21:11:27,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:11:27,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583489461] [2022-12-13 21:11:27,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583489461] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:11:27,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:11:27,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:11:27,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169958046] [2022-12-13 21:11:27,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:11:27,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:11:27,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:11:27,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:11:27,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:11:27,020 INFO L87 Difference]: Start difference. First operand 166686 states and 193191 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 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 21:11:28,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:11:28,752 INFO L93 Difference]: Finished difference Result 370852 states and 430935 transitions. [2022-12-13 21:11:28,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:11:28,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 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 274 [2022-12-13 21:11:28,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:11:29,013 INFO L225 Difference]: With dead ends: 370852 [2022-12-13 21:11:29,013 INFO L226 Difference]: Without dead ends: 204980 [2022-12-13 21:11:29,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:11:29,105 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 226 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 21:11:29,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 162 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 21:11:29,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204980 states. [2022-12-13 21:11:31,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204980 to 204969. [2022-12-13 21:11:31,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204969 states, 204968 states have (on average 1.1619618672182974) internal successors, (238165), 204968 states have internal predecessors, (238165), 0 states have call successors, (0), 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 21:11:31,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204969 states to 204969 states and 238165 transitions. [2022-12-13 21:11:31,554 INFO L78 Accepts]: Start accepts. Automaton has 204969 states and 238165 transitions. Word has length 274 [2022-12-13 21:11:31,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:11:31,554 INFO L495 AbstractCegarLoop]: Abstraction has 204969 states and 238165 transitions. [2022-12-13 21:11:31,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 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 21:11:31,554 INFO L276 IsEmpty]: Start isEmpty. Operand 204969 states and 238165 transitions. [2022-12-13 21:11:31,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-12-13 21:11:31,591 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:11:31,591 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:11:31,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 21:11:31,592 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:11:31,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:11:31,592 INFO L85 PathProgramCache]: Analyzing trace with hash -139191225, now seen corresponding path program 1 times [2022-12-13 21:11:31,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:11:31,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847354437] [2022-12-13 21:11:31,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:31,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:11:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-12-13 21:11:31,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:11:31,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847354437] [2022-12-13 21:11:31,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847354437] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:11:31,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:11:31,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:11:31,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514014818] [2022-12-13 21:11:31,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:11:31,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:11:31,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:11:31,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:11:31,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:11:31,776 INFO L87 Difference]: Start difference. First operand 204969 states and 238165 transitions. Second operand has 4 states, 4 states have (on average 51.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 21:11:33,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:11:33,652 INFO L93 Difference]: Finished difference Result 420760 states and 490823 transitions. [2022-12-13 21:11:33,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:11:33,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 280 [2022-12-13 21:11:33,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:11:33,937 INFO L225 Difference]: With dead ends: 420760 [2022-12-13 21:11:33,937 INFO L226 Difference]: Without dead ends: 217015 [2022-12-13 21:11:34,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:11:34,024 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 480 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 21:11:34,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 466 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 21:11:34,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217015 states. [2022-12-13 21:11:36,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217015 to 215781. [2022-12-13 21:11:36,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215781 states, 215780 states have (on average 1.1622995643711187) internal successors, (250801), 215780 states have internal predecessors, (250801), 0 states have call successors, (0), 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 21:11:36,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215781 states to 215781 states and 250801 transitions. [2022-12-13 21:11:36,400 INFO L78 Accepts]: Start accepts. Automaton has 215781 states and 250801 transitions. Word has length 280 [2022-12-13 21:11:36,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:11:36,400 INFO L495 AbstractCegarLoop]: Abstraction has 215781 states and 250801 transitions. [2022-12-13 21:11:36,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 21:11:36,400 INFO L276 IsEmpty]: Start isEmpty. Operand 215781 states and 250801 transitions. [2022-12-13 21:11:36,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-12-13 21:11:36,431 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:11:36,431 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:11:36,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 21:11:36,431 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:11:36,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:11:36,431 INFO L85 PathProgramCache]: Analyzing trace with hash -128368167, now seen corresponding path program 1 times [2022-12-13 21:11:36,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:11:36,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525812315] [2022-12-13 21:11:36,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:36,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:11:36,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:36,754 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-13 21:11:36,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:11:36,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525812315] [2022-12-13 21:11:36,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525812315] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:11:36,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:11:36,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:11:36,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069166330] [2022-12-13 21:11:36,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:11:36,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:11:36,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:11:36,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:11:36,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:11:36,756 INFO L87 Difference]: Start difference. First operand 215781 states and 250801 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 21:11:38,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:11:38,409 INFO L93 Difference]: Finished difference Result 417760 states and 488506 transitions. [2022-12-13 21:11:38,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:11:38,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 282 [2022-12-13 21:11:38,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:11:38,620 INFO L225 Difference]: With dead ends: 417760 [2022-12-13 21:11:38,620 INFO L226 Difference]: Without dead ends: 186354 [2022-12-13 21:11:38,707 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 21:11:38,707 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 168 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 21:11:38,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 373 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 21:11:38,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186354 states. [2022-12-13 21:11:40,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186354 to 161979. [2022-12-13 21:11:40,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161979 states, 161978 states have (on average 1.1032732840262258) internal successors, (178706), 161978 states have internal predecessors, (178706), 0 states have call successors, (0), 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 21:11:40,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161979 states to 161979 states and 178706 transitions. [2022-12-13 21:11:40,666 INFO L78 Accepts]: Start accepts. Automaton has 161979 states and 178706 transitions. Word has length 282 [2022-12-13 21:11:40,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:11:40,667 INFO L495 AbstractCegarLoop]: Abstraction has 161979 states and 178706 transitions. [2022-12-13 21:11:40,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 21:11:40,667 INFO L276 IsEmpty]: Start isEmpty. Operand 161979 states and 178706 transitions. [2022-12-13 21:11:40,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-12-13 21:11:40,689 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:11:40,690 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:11:40,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 21:11:40,690 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:11:40,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:11:40,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1069010768, now seen corresponding path program 1 times [2022-12-13 21:11:40,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:11:40,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843735605] [2022-12-13 21:11:40,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:40,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:11:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:11:40,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:11:40,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843735605] [2022-12-13 21:11:40,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843735605] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:11:40,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:11:40,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:11:40,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602247448] [2022-12-13 21:11:40,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:11:40,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:11:40,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:11:40,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:11:40,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:11:40,914 INFO L87 Difference]: Start difference. First operand 161979 states and 178706 transitions. Second operand has 4 states, 4 states have (on average 78.25) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 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 21:11:42,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:11:42,567 INFO L93 Difference]: Finished difference Result 373110 states and 411727 transitions. [2022-12-13 21:11:42,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:11:42,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 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 313 [2022-12-13 21:11:42,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:11:42,971 INFO L225 Difference]: With dead ends: 373110 [2022-12-13 21:11:42,971 INFO L226 Difference]: Without dead ends: 216836 [2022-12-13 21:11:43,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:11:43,010 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 405 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 21:11:43,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 405 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 21:11:43,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216836 states. [2022-12-13 21:11:45,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216836 to 212942. [2022-12-13 21:11:45,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212942 states, 212941 states have (on average 1.0954067089005874) internal successors, (233257), 212941 states have internal predecessors, (233257), 0 states have call successors, (0), 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 21:11:45,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212942 states to 212942 states and 233257 transitions. [2022-12-13 21:11:45,456 INFO L78 Accepts]: Start accepts. Automaton has 212942 states and 233257 transitions. Word has length 313 [2022-12-13 21:11:45,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:11:45,457 INFO L495 AbstractCegarLoop]: Abstraction has 212942 states and 233257 transitions. [2022-12-13 21:11:45,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 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 21:11:45,457 INFO L276 IsEmpty]: Start isEmpty. Operand 212942 states and 233257 transitions. [2022-12-13 21:11:45,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2022-12-13 21:11:45,487 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:11:45,488 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:11:45,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 21:11:45,488 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:11:45,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:11:45,488 INFO L85 PathProgramCache]: Analyzing trace with hash 643296175, now seen corresponding path program 1 times [2022-12-13 21:11:45,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:11:45,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859959166] [2022-12-13 21:11:45,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:45,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:11:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-13 21:11:45,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:11:45,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859959166] [2022-12-13 21:11:45,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859959166] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:11:45,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:11:45,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:11:45,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287886810] [2022-12-13 21:11:45,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:11:45,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:11:45,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:11:45,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:11:45,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:11:45,937 INFO L87 Difference]: Start difference. First operand 212942 states and 233257 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 21:11:48,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:11:48,088 INFO L93 Difference]: Finished difference Result 426346 states and 466766 transitions. [2022-12-13 21:11:48,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:11:48,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 337 [2022-12-13 21:11:48,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:11:48,325 INFO L225 Difference]: With dead ends: 426346 [2022-12-13 21:11:48,325 INFO L226 Difference]: Without dead ends: 222165 [2022-12-13 21:11:48,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:11:48,487 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 352 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:11:48,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 114 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 21:11:48,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222165 states. [2022-12-13 21:11:50,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222165 to 212536. [2022-12-13 21:11:50,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212536 states, 212535 states have (on average 1.0945679535135389) internal successors, (232634), 212535 states have internal predecessors, (232634), 0 states have call successors, (0), 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 21:11:51,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212536 states to 212536 states and 232634 transitions. [2022-12-13 21:11:51,092 INFO L78 Accepts]: Start accepts. Automaton has 212536 states and 232634 transitions. Word has length 337 [2022-12-13 21:11:51,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:11:51,092 INFO L495 AbstractCegarLoop]: Abstraction has 212536 states and 232634 transitions. [2022-12-13 21:11:51,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 21:11:51,092 INFO L276 IsEmpty]: Start isEmpty. Operand 212536 states and 232634 transitions. [2022-12-13 21:11:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-12-13 21:11:51,117 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:11:51,117 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:11:51,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 21:11:51,117 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:11:51,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:11:51,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1988591658, now seen corresponding path program 1 times [2022-12-13 21:11:51,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:11:51,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174004895] [2022-12-13 21:11:51,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:51,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:11:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 21:11:51,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:11:51,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174004895] [2022-12-13 21:11:51,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174004895] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:11:51,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:11:51,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:11:51,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933254963] [2022-12-13 21:11:51,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:11:51,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:11:51,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:11:51,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:11:51,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:11:51,552 INFO L87 Difference]: Start difference. First operand 212536 states and 232634 transitions. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 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 21:11:52,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:11:52,915 INFO L93 Difference]: Finished difference Result 415737 states and 455476 transitions. [2022-12-13 21:11:52,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:11:52,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 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 344 [2022-12-13 21:11:52,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:11:53,136 INFO L225 Difference]: With dead ends: 415737 [2022-12-13 21:11:53,136 INFO L226 Difference]: Without dead ends: 204218 [2022-12-13 21:11:53,200 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 21:11:53,201 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 101 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 21:11:53,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 275 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 21:11:53,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204218 states. [2022-12-13 21:11:55,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204218 to 198726. [2022-12-13 21:11:55,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198726 states, 198725 states have (on average 1.0883331236633538) internal successors, (216279), 198725 states have internal predecessors, (216279), 0 states have call successors, (0), 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 21:11:55,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198726 states to 198726 states and 216279 transitions. [2022-12-13 21:11:55,697 INFO L78 Accepts]: Start accepts. Automaton has 198726 states and 216279 transitions. Word has length 344 [2022-12-13 21:11:55,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:11:55,698 INFO L495 AbstractCegarLoop]: Abstraction has 198726 states and 216279 transitions. [2022-12-13 21:11:55,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 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 21:11:55,698 INFO L276 IsEmpty]: Start isEmpty. Operand 198726 states and 216279 transitions. [2022-12-13 21:11:55,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-12-13 21:11:55,747 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:11:55,747 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:11:55,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 21:11:55,748 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:11:55,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:11:55,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1067620483, now seen corresponding path program 1 times [2022-12-13 21:11:55,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:11:55,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617091918] [2022-12-13 21:11:55,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:55,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:11:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 215 proven. 6 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-12-13 21:11:56,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:11:56,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617091918] [2022-12-13 21:11:56,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617091918] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:11:56,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860345302] [2022-12-13 21:11:56,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:11:56,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:11:56,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:11:56,187 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:11:56,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 21:11:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:11:56,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 21:11:56,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:11:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 215 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-12-13 21:11:56,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:11:56,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860345302] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:11:56,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:11:56,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-12-13 21:11:56,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145324782] [2022-12-13 21:11:56,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:11:56,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:11:56,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:11:56,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:11:56,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:11:56,452 INFO L87 Difference]: Start difference. First operand 198726 states and 216279 transitions. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 2 states have internal predecessors, (289), 0 states have call successors, (0), 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 21:11:57,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:11:57,969 INFO L93 Difference]: Finished difference Result 550597 states and 598860 transitions. [2022-12-13 21:11:57,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:11:57,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 2 states have internal predecessors, (289), 0 states have call successors, (0), 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 375 [2022-12-13 21:11:57,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:11:58,321 INFO L225 Difference]: With dead ends: 550597 [2022-12-13 21:11:58,321 INFO L226 Difference]: Without dead ends: 352889 [2022-12-13 21:11:58,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:11:58,360 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 182 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 21:11:58,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 476 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 21:11:58,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352889 states. [2022-12-13 21:12:01,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352889 to 349012. [2022-12-13 21:12:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349012 states, 349011 states have (on average 1.0870402365541487) internal successors, (379389), 349011 states have internal predecessors, (379389), 0 states have call successors, (0), 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 21:12:02,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349012 states to 349012 states and 379389 transitions. [2022-12-13 21:12:02,575 INFO L78 Accepts]: Start accepts. Automaton has 349012 states and 379389 transitions. Word has length 375 [2022-12-13 21:12:02,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:12:02,575 INFO L495 AbstractCegarLoop]: Abstraction has 349012 states and 379389 transitions. [2022-12-13 21:12:02,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 2 states have internal predecessors, (289), 0 states have call successors, (0), 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 21:12:02,575 INFO L276 IsEmpty]: Start isEmpty. Operand 349012 states and 379389 transitions. [2022-12-13 21:12:02,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2022-12-13 21:12:02,603 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:12:02,603 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:12:02,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 21:12:02,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:12:02,806 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:12:02,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:12:02,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2020663209, now seen corresponding path program 1 times [2022-12-13 21:12:02,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:12:02,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896345935] [2022-12-13 21:12:02,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:12:02,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:12:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:12:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 246 proven. 9 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-12-13 21:12:03,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:12:03,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896345935] [2022-12-13 21:12:03,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896345935] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:12:03,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11476964] [2022-12-13 21:12:03,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:12:03,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:12:03,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:12:03,396 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:12:03,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 21:12:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:12:03,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 21:12:03,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:12:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 249 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-12-13 21:12:03,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:12:03,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11476964] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:12:03,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:12:03,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-13 21:12:03,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609623897] [2022-12-13 21:12:03,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:12:03,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:12:03,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:12:03,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:12:03,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 21:12:03,620 INFO L87 Difference]: Start difference. First operand 349012 states and 379389 transitions. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 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 21:12:05,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:12:05,910 INFO L93 Difference]: Finished difference Result 699116 states and 760068 transitions. [2022-12-13 21:12:05,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:12:05,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 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 398 [2022-12-13 21:12:05,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:12:06,328 INFO L225 Difference]: With dead ends: 699116 [2022-12-13 21:12:06,328 INFO L226 Difference]: Without dead ends: 351324 [2022-12-13 21:12:06,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 21:12:06,446 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 210 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 21:12:06,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 337 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 21:12:06,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351324 states. [2022-12-13 21:12:09,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351324 to 333341. [2022-12-13 21:12:10,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333341 states, 333340 states have (on average 1.0794054118917622) internal successors, (359809), 333340 states have internal predecessors, (359809), 0 states have call successors, (0), 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 21:12:10,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333341 states to 333341 states and 359809 transitions. [2022-12-13 21:12:10,513 INFO L78 Accepts]: Start accepts. Automaton has 333341 states and 359809 transitions. Word has length 398 [2022-12-13 21:12:10,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:12:10,513 INFO L495 AbstractCegarLoop]: Abstraction has 333341 states and 359809 transitions. [2022-12-13 21:12:10,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 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 21:12:10,513 INFO L276 IsEmpty]: Start isEmpty. Operand 333341 states and 359809 transitions. [2022-12-13 21:12:10,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2022-12-13 21:12:10,538 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:12:10,539 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:12:10,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 21:12:10,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:12:10,741 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:12:10,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:12:10,742 INFO L85 PathProgramCache]: Analyzing trace with hash 574284266, now seen corresponding path program 1 times [2022-12-13 21:12:10,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:12:10,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924213572] [2022-12-13 21:12:10,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:12:10,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:12:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:12:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 272 proven. 83 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-13 21:12:11,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:12:11,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924213572] [2022-12-13 21:12:11,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924213572] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:12:11,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528472365] [2022-12-13 21:12:11,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:12:11,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:12:11,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:12:11,864 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:12:11,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 21:12:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:12:12,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 21:12:12,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:12:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 355 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-13 21:12:12,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:12:12,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528472365] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:12:12,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:12:12,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-12-13 21:12:12,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100655645] [2022-12-13 21:12:12,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:12:12,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:12:12,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:12:12,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:12:12,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-13 21:12:12,325 INFO L87 Difference]: Start difference. First operand 333341 states and 359809 transitions. Second operand has 4 states, 4 states have (on average 91.75) internal successors, (367), 4 states have internal predecessors, (367), 0 states have call successors, (0), 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 21:12:14,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:12:14,479 INFO L93 Difference]: Finished difference Result 602766 states and 649221 transitions. [2022-12-13 21:12:14,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:12:14,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 91.75) internal successors, (367), 4 states have internal predecessors, (367), 0 states have call successors, (0), 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 400 [2022-12-13 21:12:14,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:12:14,786 INFO L225 Difference]: With dead ends: 602766 [2022-12-13 21:12:14,786 INFO L226 Difference]: Without dead ends: 270848 [2022-12-13 21:12:14,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-13 21:12:14,894 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 240 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 21:12:14,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 139 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 21:12:15,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270848 states. [2022-12-13 21:12:17,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270848 to 231824. [2022-12-13 21:12:17,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231824 states, 231823 states have (on average 1.0691907187811391) internal successors, (247863), 231823 states have internal predecessors, (247863), 0 states have call successors, (0), 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 21:12:17,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231824 states to 231824 states and 247863 transitions. [2022-12-13 21:12:17,980 INFO L78 Accepts]: Start accepts. Automaton has 231824 states and 247863 transitions. Word has length 400 [2022-12-13 21:12:17,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:12:17,981 INFO L495 AbstractCegarLoop]: Abstraction has 231824 states and 247863 transitions. [2022-12-13 21:12:17,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.75) internal successors, (367), 4 states have internal predecessors, (367), 0 states have call successors, (0), 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 21:12:17,981 INFO L276 IsEmpty]: Start isEmpty. Operand 231824 states and 247863 transitions. [2022-12-13 21:12:18,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2022-12-13 21:12:18,005 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:12:18,005 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:12:18,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 21:12:18,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:12:18,207 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:12:18,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:12:18,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1278796474, now seen corresponding path program 1 times [2022-12-13 21:12:18,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:12:18,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74132887] [2022-12-13 21:12:18,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:12:18,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:12:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:12:18,946 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-12-13 21:12:18,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:12:18,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74132887] [2022-12-13 21:12:18,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74132887] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:12:18,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:12:18,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:12:18,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278278431] [2022-12-13 21:12:18,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:12:18,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:12:18,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:12:18,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:12:18,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:12:18,947 INFO L87 Difference]: Start difference. First operand 231824 states and 247863 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 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 21:12:20,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:12:20,362 INFO L93 Difference]: Finished difference Result 462226 states and 494251 transitions. [2022-12-13 21:12:20,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:12:20,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 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 400 [2022-12-13 21:12:20,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:12:20,629 INFO L225 Difference]: With dead ends: 462226 [2022-12-13 21:12:20,629 INFO L226 Difference]: Without dead ends: 231622 [2022-12-13 21:12:20,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:12:20,723 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 133 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 21:12:20,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 127 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 21:12:21,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231622 states. [2022-12-13 21:12:23,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231622 to 231621. [2022-12-13 21:12:23,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231621 states, 231620 states have (on average 1.0692038684051464) internal successors, (247649), 231620 states have internal predecessors, (247649), 0 states have call successors, (0), 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 21:12:23,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231621 states to 231621 states and 247649 transitions. [2022-12-13 21:12:23,438 INFO L78 Accepts]: Start accepts. Automaton has 231621 states and 247649 transitions. Word has length 400 [2022-12-13 21:12:23,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:12:23,439 INFO L495 AbstractCegarLoop]: Abstraction has 231621 states and 247649 transitions. [2022-12-13 21:12:23,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 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 21:12:23,439 INFO L276 IsEmpty]: Start isEmpty. Operand 231621 states and 247649 transitions. [2022-12-13 21:12:23,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2022-12-13 21:12:23,462 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:12:23,462 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:12:23,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 21:12:23,462 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:12:23,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:12:23,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1593951153, now seen corresponding path program 1 times [2022-12-13 21:12:23,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:12:23,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462319729] [2022-12-13 21:12:23,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:12:23,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:12:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:12:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 262 proven. 6 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-12-13 21:12:24,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:12:24,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462319729] [2022-12-13 21:12:24,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462319729] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:12:24,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519291264] [2022-12-13 21:12:24,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:12:24,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:12:24,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:12:24,805 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:12:24,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 21:12:25,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:12:25,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 21:12:25,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:12:25,319 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 268 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-12-13 21:12:25,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:12:25,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519291264] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:12:25,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:12:25,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-13 21:12:25,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931988572] [2022-12-13 21:12:25,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:12:25,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:12:25,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:12:25,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:12:25,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 21:12:25,321 INFO L87 Difference]: Start difference. First operand 231621 states and 247649 transitions. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 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 21:12:26,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:12:26,853 INFO L93 Difference]: Finished difference Result 457164 states and 489005 transitions. [2022-12-13 21:12:26,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:12:26,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 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 416 [2022-12-13 21:12:26,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:12:27,095 INFO L225 Difference]: With dead ends: 457164 [2022-12-13 21:12:27,096 INFO L226 Difference]: Without dead ends: 228797 [2022-12-13 21:12:27,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 21:12:27,168 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 73 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 21:12:27,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 339 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 21:12:27,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228797 states. [2022-12-13 21:12:29,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228797 to 214768. [2022-12-13 21:12:29,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214768 states, 214767 states have (on average 1.0698803819953717) internal successors, (229775), 214767 states have internal predecessors, (229775), 0 states have call successors, (0), 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 21:12:29,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214768 states to 214768 states and 229775 transitions. [2022-12-13 21:12:29,578 INFO L78 Accepts]: Start accepts. Automaton has 214768 states and 229775 transitions. Word has length 416 [2022-12-13 21:12:29,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:12:29,578 INFO L495 AbstractCegarLoop]: Abstraction has 214768 states and 229775 transitions. [2022-12-13 21:12:29,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 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 21:12:29,578 INFO L276 IsEmpty]: Start isEmpty. Operand 214768 states and 229775 transitions. [2022-12-13 21:12:29,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2022-12-13 21:12:29,601 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:12:29,601 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:12:29,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 21:12:29,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:12:29,804 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:12:29,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:12:29,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1556280656, now seen corresponding path program 1 times [2022-12-13 21:12:29,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:12:29,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468649318] [2022-12-13 21:12:29,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:12:29,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:12:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:12:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 291 proven. 83 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-13 21:12:30,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:12:30,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468649318] [2022-12-13 21:12:30,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468649318] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:12:30,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174328496] [2022-12-13 21:12:30,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:12:30,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:12:30,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:12:30,906 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:12:30,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 21:12:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:12:31,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 21:12:31,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:12:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 368 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 21:12:31,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:12:31,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174328496] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:12:31,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:12:31,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-12-13 21:12:31,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17456296] [2022-12-13 21:12:31,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:12:31,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:12:31,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:12:31,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:12:31,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 21:12:31,235 INFO L87 Difference]: Start difference. First operand 214768 states and 229775 transitions. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 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 21:12:32,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:12:32,682 INFO L93 Difference]: Finished difference Result 430591 states and 460736 transitions. [2022-12-13 21:12:32,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:12:32,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 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 417 [2022-12-13 21:12:32,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:12:32,942 INFO L225 Difference]: With dead ends: 430591 [2022-12-13 21:12:32,942 INFO L226 Difference]: Without dead ends: 217043 [2022-12-13 21:12:33,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 21:12:33,046 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 140 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 21:12:33,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 336 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 21:12:33,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217043 states. [2022-12-13 21:12:35,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217043 to 215775. [2022-12-13 21:12:35,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215775 states, 215774 states have (on average 1.066759665205261) internal successors, (230179), 215774 states have internal predecessors, (230179), 0 states have call successors, (0), 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 21:12:35,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215775 states to 215775 states and 230179 transitions. [2022-12-13 21:12:35,975 INFO L78 Accepts]: Start accepts. Automaton has 215775 states and 230179 transitions. Word has length 417 [2022-12-13 21:12:35,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:12:35,975 INFO L495 AbstractCegarLoop]: Abstraction has 215775 states and 230179 transitions. [2022-12-13 21:12:35,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 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 21:12:35,975 INFO L276 IsEmpty]: Start isEmpty. Operand 215775 states and 230179 transitions. [2022-12-13 21:12:35,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2022-12-13 21:12:35,999 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:12:35,999 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:12:36,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 21:12:36,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 21:12:36,202 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:12:36,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:12:36,204 INFO L85 PathProgramCache]: Analyzing trace with hash 563929808, now seen corresponding path program 1 times [2022-12-13 21:12:36,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:12:36,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996677963] [2022-12-13 21:12:36,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:12:36,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:12:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:12:36,635 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 362 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-13 21:12:36,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:12:36,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996677963] [2022-12-13 21:12:36,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996677963] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:12:36,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:12:36,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:12:36,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397046432] [2022-12-13 21:12:36,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:12:36,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:12:36,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:12:36,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:12:36,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:12:36,636 INFO L87 Difference]: Start difference. First operand 215775 states and 230179 transitions. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 21:12:38,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:12:38,544 INFO L93 Difference]: Finished difference Result 562719 states and 600529 transitions. [2022-12-13 21:12:38,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:12:38,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 428 [2022-12-13 21:12:38,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:12:38,904 INFO L225 Difference]: With dead ends: 562719 [2022-12-13 21:12:38,904 INFO L226 Difference]: Without dead ends: 348164 [2022-12-13 21:12:38,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:12:38,991 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 345 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 21:12:38,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 277 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 21:12:39,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348164 states. [2022-12-13 21:12:42,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348164 to 339950. [2022-12-13 21:12:42,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339950 states, 339949 states have (on average 1.066765897237527) internal successors, (362646), 339949 states have internal predecessors, (362646), 0 states have call successors, (0), 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 21:12:43,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339950 states to 339950 states and 362646 transitions. [2022-12-13 21:12:43,224 INFO L78 Accepts]: Start accepts. Automaton has 339950 states and 362646 transitions. Word has length 428 [2022-12-13 21:12:43,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:12:43,225 INFO L495 AbstractCegarLoop]: Abstraction has 339950 states and 362646 transitions. [2022-12-13 21:12:43,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 21:12:43,225 INFO L276 IsEmpty]: Start isEmpty. Operand 339950 states and 362646 transitions. [2022-12-13 21:12:43,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2022-12-13 21:12:43,245 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:12:43,245 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:12:43,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-13 21:12:43,246 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:12:43,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:12:43,246 INFO L85 PathProgramCache]: Analyzing trace with hash 636169280, now seen corresponding path program 1 times [2022-12-13 21:12:43,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:12:43,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799064809] [2022-12-13 21:12:43,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:12:43,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:12:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:12:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 276 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:12:44,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:12:44,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799064809] [2022-12-13 21:12:44,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799064809] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:12:44,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252361656] [2022-12-13 21:12:44,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:12:44,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:12:44,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:12:44,575 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:12:44,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 21:12:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:12:44,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 21:12:44,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:12:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 262 proven. 0 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2022-12-13 21:12:44,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:12:44,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252361656] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:12:44,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:12:44,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-12-13 21:12:44,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537412315] [2022-12-13 21:12:44,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:12:44,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:12:44,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:12:44,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:12:44,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-13 21:12:44,958 INFO L87 Difference]: Start difference. First operand 339950 states and 362646 transitions. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 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 21:12:46,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:12:46,892 INFO L93 Difference]: Finished difference Result 667316 states and 711787 transitions. [2022-12-13 21:12:46,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:12:46,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 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 428 [2022-12-13 21:12:46,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:12:47,257 INFO L225 Difference]: With dead ends: 667316 [2022-12-13 21:12:47,257 INFO L226 Difference]: Without dead ends: 326758 [2022-12-13 21:12:47,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-13 21:12:47,365 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 77 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 21:12:47,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 296 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 21:12:47,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326758 states. [2022-12-13 21:12:50,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326758 to 271721. [2022-12-13 21:12:50,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271721 states, 271720 states have (on average 1.0547880170764021) internal successors, (286607), 271720 states have internal predecessors, (286607), 0 states have call successors, (0), 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 21:12:50,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271721 states to 271721 states and 286607 transitions. [2022-12-13 21:12:50,870 INFO L78 Accepts]: Start accepts. Automaton has 271721 states and 286607 transitions. Word has length 428 [2022-12-13 21:12:50,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:12:50,871 INFO L495 AbstractCegarLoop]: Abstraction has 271721 states and 286607 transitions. [2022-12-13 21:12:50,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 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 21:12:50,871 INFO L276 IsEmpty]: Start isEmpty. Operand 271721 states and 286607 transitions. [2022-12-13 21:12:50,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2022-12-13 21:12:50,889 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:12:50,889 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:12:50,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-13 21:12:51,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ee92048-68f6-46ed-ab5b-746a4a92745e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 21:12:51,091 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:12:51,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:12:51,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1985078850, now seen corresponding path program 1 times [2022-12-13 21:12:51,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:12:51,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419467869] [2022-12-13 21:12:51,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:12:51,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:12:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:12:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 401 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-13 21:12:51,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:12:51,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419467869] [2022-12-13 21:12:51,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419467869] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:12:51,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:12:51,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:12:51,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821378480] [2022-12-13 21:12:51,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:12:51,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:12:51,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:12:51,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:12:51,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:12:51,414 INFO L87 Difference]: Start difference. First operand 271721 states and 286607 transitions. Second operand has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 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 21:12:53,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:12:53,752 INFO L93 Difference]: Finished difference Result 709987 states and 749024 transitions. [2022-12-13 21:12:53,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:12:53,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 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 439 [2022-12-13 21:12:53,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:12:54,356 INFO L225 Difference]: With dead ends: 709987 [2022-12-13 21:12:54,356 INFO L226 Difference]: Without dead ends: 440299 [2022-12-13 21:12:54,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:12:54,424 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 333 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 21:12:54,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 267 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 21:12:54,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440299 states. [2022-12-13 21:12:58,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440299 to 434498. [2022-12-13 21:12:58,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434498 states, 434497 states have (on average 1.0548657413054636) internal successors, (458336), 434497 states have internal predecessors, (458336), 0 states have call successors, (0), 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 21:12:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434498 states to 434498 states and 458336 transitions. [2022-12-13 21:12:59,549 INFO L78 Accepts]: Start accepts. Automaton has 434498 states and 458336 transitions. Word has length 439 [2022-12-13 21:12:59,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:12:59,549 INFO L495 AbstractCegarLoop]: Abstraction has 434498 states and 458336 transitions. [2022-12-13 21:12:59,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 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 21:12:59,550 INFO L276 IsEmpty]: Start isEmpty. Operand 434498 states and 458336 transitions. [2022-12-13 21:12:59,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2022-12-13 21:12:59,571 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:12:59,571 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:12:59,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-13 21:12:59,571 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:12:59,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:12:59,571 INFO L85 PathProgramCache]: Analyzing trace with hash 664978343, now seen corresponding path program 2 times [2022-12-13 21:12:59,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:12:59,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20654412] [2022-12-13 21:12:59,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:12:59,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:12:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat