./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de51.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de51.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R --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 6b650e50691cb35e1bdf008faa87d25716bf83c58902e8bffb444ab81952ff19 --- 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-38b53e6 [2022-11-25 15:36:19,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:36:19,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:36:19,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:36:19,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:36:19,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:36:19,808 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:36:19,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:36:19,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:36:19,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:36:19,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:36:19,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:36:19,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:36:19,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:36:19,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:36:19,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:36:19,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:36:19,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:36:19,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:36:19,848 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:36:19,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:36:19,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:36:19,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:36:19,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:36:19,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:36:19,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:36:19,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:36:19,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:36:19,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:36:19,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:36:19,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:36:19,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:36:19,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:36:19,874 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:36:19,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:36:19,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:36:19,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:36:19,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:36:19,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:36:19,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:36:19,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:36:19,879 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:36:19,927 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:36:19,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:36:19,928 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:36:19,928 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:36:19,929 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:36:19,929 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:36:19,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:36:19,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:36:19,930 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:36:19,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:36:19,932 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:36:19,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:36:19,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:36:19,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:36:19,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:36:19,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:36:19,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:36:19,933 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:36:19,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:36:19,934 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:36:19,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:36:19,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:36:19,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:36:19,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:36:19,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:36:19,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:36:19,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:36:19,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:36:19,936 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:36:19,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:36:19,936 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:36:19,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:36:19,937 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:36:19,937 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:36:19,937 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_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b650e50691cb35e1bdf008faa87d25716bf83c58902e8bffb444ab81952ff19 [2022-11-25 15:36:20,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:36:20,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:36:20,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:36:20,210 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:36:20,211 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:36:20,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/loops-crafted-1/in-de51.c [2022-11-25 15:36:23,397 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:36:23,623 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:36:23,624 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/sv-benchmarks/c/loops-crafted-1/in-de51.c [2022-11-25 15:36:23,630 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/data/3671a62be/494838b13aec40ea91065e7291f8040f/FLAGe42984056 [2022-11-25 15:36:23,652 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/data/3671a62be/494838b13aec40ea91065e7291f8040f [2022-11-25 15:36:23,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:36:23,658 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:36:23,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:36:23,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:36:23,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:36:23,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:36:23" (1/1) ... [2022-11-25 15:36:23,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31a648b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:36:23, skipping insertion in model container [2022-11-25 15:36:23,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:36:23" (1/1) ... [2022-11-25 15:36:23,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:36:23,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:36:23,888 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_383f94b3-50e3-485a-a18e-0147f8ecfff2/sv-benchmarks/c/loops-crafted-1/in-de51.c[368,381] [2022-11-25 15:36:23,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:36:23,920 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:36:23,934 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_383f94b3-50e3-485a-a18e-0147f8ecfff2/sv-benchmarks/c/loops-crafted-1/in-de51.c[368,381] [2022-11-25 15:36:23,953 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:36:23,974 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:36:23,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:36:23 WrapperNode [2022-11-25 15:36:23,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:36:23,976 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:36:23,977 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:36:23,977 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:36:23,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:36:23" (1/1) ... [2022-11-25 15:36:23,993 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:36:23" (1/1) ... [2022-11-25 15:36:24,019 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2022-11-25 15:36:24,020 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:36:24,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:36:24,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:36:24,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:36:24,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:36:23" (1/1) ... [2022-11-25 15:36:24,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:36:23" (1/1) ... [2022-11-25 15:36:24,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:36:23" (1/1) ... [2022-11-25 15:36:24,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:36:23" (1/1) ... [2022-11-25 15:36:24,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:36:23" (1/1) ... [2022-11-25 15:36:24,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:36:23" (1/1) ... [2022-11-25 15:36:24,064 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:36:23" (1/1) ... [2022-11-25 15:36:24,069 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:36:23" (1/1) ... [2022-11-25 15:36:24,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:36:24,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:36:24,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:36:24,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:36:24,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:36:23" (1/1) ... [2022-11-25 15:36:24,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:36:24,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:24,114 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:36:24,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:36:24,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:36:24,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:36:24,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:36:24,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:36:24,221 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:36:24,223 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:36:24,371 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:36:24,377 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:36:24,378 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-25 15:36:24,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:36:24 BoogieIcfgContainer [2022-11-25 15:36:24,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:36:24,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:36:24,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:36:24,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:36:24,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:36:23" (1/3) ... [2022-11-25 15:36:24,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342c0e8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:36:24, skipping insertion in model container [2022-11-25 15:36:24,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:36:23" (2/3) ... [2022-11-25 15:36:24,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342c0e8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:36:24, skipping insertion in model container [2022-11-25 15:36:24,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:36:24" (3/3) ... [2022-11-25 15:36:24,391 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de51.c [2022-11-25 15:36:24,411 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:36:24,411 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 15:36:24,464 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:36:24,471 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;@4a9ad1b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:36:24,472 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 15:36:24,476 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:24,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 15:36:24,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:24,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:24,484 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:24,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:24,490 INFO L85 PathProgramCache]: Analyzing trace with hash 62220644, now seen corresponding path program 1 times [2022-11-25 15:36:24,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:24,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016572678] [2022-11-25 15:36:24,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:24,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:24,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:24,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016572678] [2022-11-25 15:36:24,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016572678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:36:24,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:36:24,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:36:24,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143171359] [2022-11-25 15:36:24,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:36:24,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 15:36:24,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:24,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 15:36:24,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 15:36:24,707 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:24,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:24,727 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2022-11-25 15:36:24,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 15:36:24,730 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 15:36:24,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:24,739 INFO L225 Difference]: With dead ends: 29 [2022-11-25 15:36:24,740 INFO L226 Difference]: Without dead ends: 12 [2022-11-25 15:36:24,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 15:36:24,752 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:24,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:36:24,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-25 15:36:24,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-25 15:36:24,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:24,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2022-11-25 15:36:24,789 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 11 [2022-11-25 15:36:24,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:24,791 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2022-11-25 15:36:24,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:24,791 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2022-11-25 15:36:24,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 15:36:24,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:24,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:24,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:36:24,793 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:24,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:24,794 INFO L85 PathProgramCache]: Analyzing trace with hash 58526560, now seen corresponding path program 1 times [2022-11-25 15:36:24,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:24,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483932429] [2022-11-25 15:36:24,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:24,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:25,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:25,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483932429] [2022-11-25 15:36:25,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483932429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:36:25,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:36:25,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:36:25,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786394979] [2022-11-25 15:36:25,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:36:25,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:36:25,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:25,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:36:25,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:36:25,291 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:25,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:25,367 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2022-11-25 15:36:25,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:36:25,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 15:36:25,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:25,368 INFO L225 Difference]: With dead ends: 22 [2022-11-25 15:36:25,369 INFO L226 Difference]: Without dead ends: 18 [2022-11-25 15:36:25,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:36:25,370 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:25,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:36:25,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-25 15:36:25,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-25 15:36:25,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:25,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2022-11-25 15:36:25,377 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 11 [2022-11-25 15:36:25,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:25,377 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2022-11-25 15:36:25,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:25,377 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2022-11-25 15:36:25,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 15:36:25,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:25,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:25,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:36:25,379 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:25,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:25,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1815988777, now seen corresponding path program 1 times [2022-11-25 15:36:25,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:25,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824267197] [2022-11-25 15:36:25,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:25,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:25,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:25,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:25,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:25,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824267197] [2022-11-25 15:36:25,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824267197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:36:25,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:36:25,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:36:25,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335740109] [2022-11-25 15:36:25,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:36:25,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:36:25,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:25,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:36:25,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:36:25,416 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:25,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:25,438 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2022-11-25 15:36:25,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:36:25,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 15:36:25,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:25,440 INFO L225 Difference]: With dead ends: 29 [2022-11-25 15:36:25,440 INFO L226 Difference]: Without dead ends: 23 [2022-11-25 15:36:25,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:36:25,442 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:25,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 20 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:36:25,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-25 15:36:25,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-25 15:36:25,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:25,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 34 transitions. [2022-11-25 15:36:25,450 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 34 transitions. Word has length 12 [2022-11-25 15:36:25,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:25,451 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 34 transitions. [2022-11-25 15:36:25,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:25,451 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 34 transitions. [2022-11-25 15:36:25,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 15:36:25,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:25,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:25,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:36:25,453 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:25,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1861241306, now seen corresponding path program 1 times [2022-11-25 15:36:25,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:25,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656571342] [2022-11-25 15:36:25,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:25,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:25,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:25,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656571342] [2022-11-25 15:36:25,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656571342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:36:25,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:36:25,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:36:25,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138903017] [2022-11-25 15:36:25,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:36:25,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:36:25,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:25,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:36:25,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:36:25,518 INFO L87 Difference]: Start difference. First operand 23 states and 34 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:25,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:25,598 INFO L93 Difference]: Finished difference Result 41 states and 59 transitions. [2022-11-25 15:36:25,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:36:25,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 15:36:25,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:25,599 INFO L225 Difference]: With dead ends: 41 [2022-11-25 15:36:25,600 INFO L226 Difference]: Without dead ends: 32 [2022-11-25 15:36:25,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:36:25,601 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:25,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 19 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:36:25,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-25 15:36:25,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-11-25 15:36:25,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:25,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2022-11-25 15:36:25,623 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 12 [2022-11-25 15:36:25,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:25,624 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2022-11-25 15:36:25,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:25,624 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2022-11-25 15:36:25,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 15:36:25,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:25,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:25,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 15:36:25,625 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:25,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:25,626 INFO L85 PathProgramCache]: Analyzing trace with hash -492890182, now seen corresponding path program 1 times [2022-11-25 15:36:25,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:25,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022354592] [2022-11-25 15:36:25,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:25,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:25,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:25,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022354592] [2022-11-25 15:36:25,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022354592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:36:25,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:36:25,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:36:25,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099412398] [2022-11-25 15:36:25,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:36:25,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:36:25,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:25,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:36:25,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:36:25,752 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:25,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:25,824 INFO L93 Difference]: Finished difference Result 38 states and 55 transitions. [2022-11-25 15:36:25,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:36:25,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 15:36:25,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:25,826 INFO L225 Difference]: With dead ends: 38 [2022-11-25 15:36:25,826 INFO L226 Difference]: Without dead ends: 21 [2022-11-25 15:36:25,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:36:25,828 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:25,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 31 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:36:25,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-25 15:36:25,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-25 15:36:25,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:25,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 30 transitions. [2022-11-25 15:36:25,839 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 30 transitions. Word has length 12 [2022-11-25 15:36:25,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:25,840 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 30 transitions. [2022-11-25 15:36:25,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:25,840 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 30 transitions. [2022-11-25 15:36:25,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 15:36:25,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:25,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:25,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 15:36:25,841 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:25,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:25,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1431516133, now seen corresponding path program 1 times [2022-11-25 15:36:25,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:25,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423121714] [2022-11-25 15:36:25,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:25,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:25,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:25,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423121714] [2022-11-25 15:36:25,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423121714] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:25,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871489128] [2022-11-25 15:36:25,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:25,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:25,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:26,006 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:26,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:36:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:26,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 15:36:26,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:26,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:26,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871489128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:26,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:26,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-25 15:36:26,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015227826] [2022-11-25 15:36:26,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:26,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 15:36:26,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:26,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 15:36:26,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-25 15:36:26,262 INFO L87 Difference]: Start difference. First operand 21 states and 30 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:26,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:26,486 INFO L93 Difference]: Finished difference Result 84 states and 118 transitions. [2022-11-25 15:36:26,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 15:36:26,487 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 15:36:26,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:26,492 INFO L225 Difference]: With dead ends: 84 [2022-11-25 15:36:26,492 INFO L226 Difference]: Without dead ends: 71 [2022-11-25 15:36:26,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-25 15:36:26,501 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:26,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 69 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:36:26,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-25 15:36:26,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 33. [2022-11-25 15:36:26,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:26,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 47 transitions. [2022-11-25 15:36:26,525 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 47 transitions. Word has length 12 [2022-11-25 15:36:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:26,526 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 47 transitions. [2022-11-25 15:36:26,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:26,526 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 47 transitions. [2022-11-25 15:36:26,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 15:36:26,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:26,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:26,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 15:36:26,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:26,734 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:26,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:26,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1643101482, now seen corresponding path program 1 times [2022-11-25 15:36:26,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:26,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330223887] [2022-11-25 15:36:26,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:26,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:26,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:26,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330223887] [2022-11-25 15:36:26,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330223887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:26,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812633756] [2022-11-25 15:36:26,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:26,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:26,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:26,851 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:26,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:36:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:26,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:36:26,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:36:26,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:27,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:36:27,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812633756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:27,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:27,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 9 [2022-11-25 15:36:27,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763703693] [2022-11-25 15:36:27,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:27,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 15:36:27,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:27,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 15:36:27,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-25 15:36:27,011 INFO L87 Difference]: Start difference. First operand 33 states and 47 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:27,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:27,279 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2022-11-25 15:36:27,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 15:36:27,280 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-25 15:36:27,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:27,281 INFO L225 Difference]: With dead ends: 77 [2022-11-25 15:36:27,281 INFO L226 Difference]: Without dead ends: 67 [2022-11-25 15:36:27,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:36:27,282 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 48 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:27,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 50 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:36:27,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-25 15:36:27,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2022-11-25 15:36:27,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:27,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2022-11-25 15:36:27,303 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 14 [2022-11-25 15:36:27,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:27,304 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2022-11-25 15:36:27,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:27,304 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2022-11-25 15:36:27,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 15:36:27,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:27,306 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:27,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:36:27,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 15:36:27,512 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:27,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:27,512 INFO L85 PathProgramCache]: Analyzing trace with hash 834986528, now seen corresponding path program 2 times [2022-11-25 15:36:27,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:27,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323727637] [2022-11-25 15:36:27,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:27,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:27,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:27,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323727637] [2022-11-25 15:36:27,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323727637] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:27,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191359404] [2022-11-25 15:36:27,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:36:27,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:27,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:27,721 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:27,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:36:27,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:36:27,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:36:27,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 15:36:27,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:27,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:27,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191359404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:27,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:27,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-11-25 15:36:27,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147029164] [2022-11-25 15:36:27,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:27,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 15:36:27,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:27,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 15:36:27,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:36:27,991 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:28,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:28,997 INFO L93 Difference]: Finished difference Result 223 states and 326 transitions. [2022-11-25 15:36:28,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 15:36:28,998 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-25 15:36:28,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:28,999 INFO L225 Difference]: With dead ends: 223 [2022-11-25 15:36:28,999 INFO L226 Difference]: Without dead ends: 206 [2022-11-25 15:36:29,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2022-11-25 15:36:29,001 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 301 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:29,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 289 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 15:36:29,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-25 15:36:29,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 70. [2022-11-25 15:36:29,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.434782608695652) internal successors, (99), 69 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:29,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 99 transitions. [2022-11-25 15:36:29,038 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 99 transitions. Word has length 15 [2022-11-25 15:36:29,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:29,038 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 99 transitions. [2022-11-25 15:36:29,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:29,039 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 99 transitions. [2022-11-25 15:36:29,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 15:36:29,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:29,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:29,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 15:36:29,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:29,245 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:29,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:29,245 INFO L85 PathProgramCache]: Analyzing trace with hash -71318983, now seen corresponding path program 1 times [2022-11-25 15:36:29,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:29,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137366320] [2022-11-25 15:36:29,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:29,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:36:29,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:29,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137366320] [2022-11-25 15:36:29,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137366320] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:29,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126755549] [2022-11-25 15:36:29,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:29,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:29,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:29,399 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:29,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:36:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:29,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 15:36:29,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:36:29,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:29,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:36:29,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126755549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:29,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:29,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-25 15:36:29,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685754952] [2022-11-25 15:36:29,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:29,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 15:36:29,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:29,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 15:36:29,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-25 15:36:29,561 INFO L87 Difference]: Start difference. First operand 70 states and 99 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:29,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:29,637 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2022-11-25 15:36:29,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:36:29,637 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-25 15:36:29,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:29,638 INFO L225 Difference]: With dead ends: 77 [2022-11-25 15:36:29,638 INFO L226 Difference]: Without dead ends: 71 [2022-11-25 15:36:29,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-25 15:36:29,639 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:29,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:36:29,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-25 15:36:29,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-11-25 15:36:29,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 70 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:29,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-11-25 15:36:29,676 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 16 [2022-11-25 15:36:29,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:29,676 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-11-25 15:36:29,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:29,677 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-11-25 15:36:29,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 15:36:29,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:29,682 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:29,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-25 15:36:29,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:29,887 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:29,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:29,888 INFO L85 PathProgramCache]: Analyzing trace with hash -806394657, now seen corresponding path program 2 times [2022-11-25 15:36:29,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:29,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320003274] [2022-11-25 15:36:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:29,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:29,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:36:30,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:30,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320003274] [2022-11-25 15:36:30,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320003274] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:30,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150422338] [2022-11-25 15:36:30,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:36:30,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:30,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:30,095 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:30,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 15:36:30,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:36:30,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:36:30,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:36:30,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:36:30,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:36:30,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150422338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:30,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:30,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 8 [2022-11-25 15:36:30,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691135260] [2022-11-25 15:36:30,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:30,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 15:36:30,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:30,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 15:36:30,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 15:36:30,224 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:30,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:30,309 INFO L93 Difference]: Finished difference Result 91 states and 124 transitions. [2022-11-25 15:36:30,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:36:30,310 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-25 15:36:30,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:30,311 INFO L225 Difference]: With dead ends: 91 [2022-11-25 15:36:30,311 INFO L226 Difference]: Without dead ends: 74 [2022-11-25 15:36:30,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 15:36:30,313 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:30,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 75 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:36:30,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-25 15:36:30,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2022-11-25 15:36:30,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.459016393442623) internal successors, (89), 61 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:30,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2022-11-25 15:36:30,343 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 17 [2022-11-25 15:36:30,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:30,344 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2022-11-25 15:36:30,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:30,344 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2022-11-25 15:36:30,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 15:36:30,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:30,345 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:30,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 15:36:30,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:30,551 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:30,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:30,551 INFO L85 PathProgramCache]: Analyzing trace with hash 2118522240, now seen corresponding path program 1 times [2022-11-25 15:36:30,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:30,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287117140] [2022-11-25 15:36:30,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:30,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 15:36:30,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:30,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287117140] [2022-11-25 15:36:30,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287117140] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:30,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901445849] [2022-11-25 15:36:30,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:30,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:30,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:30,678 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:30,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 15:36:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:30,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:36:30,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:30,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 15:36:30,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 15:36:30,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901445849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:30,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:30,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-11-25 15:36:30,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268042708] [2022-11-25 15:36:30,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:30,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 15:36:30,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:30,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 15:36:30,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-25 15:36:30,902 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:31,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:31,195 INFO L93 Difference]: Finished difference Result 118 states and 156 transitions. [2022-11-25 15:36:31,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 15:36:31,197 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-25 15:36:31,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:31,198 INFO L225 Difference]: With dead ends: 118 [2022-11-25 15:36:31,198 INFO L226 Difference]: Without dead ends: 98 [2022-11-25 15:36:31,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-25 15:36:31,200 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 71 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:31,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 116 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:36:31,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-25 15:36:31,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 58. [2022-11-25 15:36:31,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 57 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 82 transitions. [2022-11-25 15:36:31,230 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 82 transitions. Word has length 17 [2022-11-25 15:36:31,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:31,230 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 82 transitions. [2022-11-25 15:36:31,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:31,231 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 82 transitions. [2022-11-25 15:36:31,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 15:36:31,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:31,233 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:31,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 15:36:31,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 15:36:31,444 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:31,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:31,445 INFO L85 PathProgramCache]: Analyzing trace with hash 855427872, now seen corresponding path program 2 times [2022-11-25 15:36:31,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:31,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390161558] [2022-11-25 15:36:31,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:31,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:31,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:31,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390161558] [2022-11-25 15:36:31,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390161558] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:31,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133953554] [2022-11-25 15:36:31,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:36:31,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:31,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:31,612 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:31,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 15:36:31,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:36:31,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:36:31,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 15:36:31,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:36:31,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:36:31,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133953554] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:31,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:31,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2022-11-25 15:36:31,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90517024] [2022-11-25 15:36:31,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:31,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:36:31,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:31,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:36:31,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:36:31,755 INFO L87 Difference]: Start difference. First operand 58 states and 82 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:32,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:32,332 INFO L93 Difference]: Finished difference Result 129 states and 176 transitions. [2022-11-25 15:36:32,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 15:36:32,333 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-25 15:36:32,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:32,334 INFO L225 Difference]: With dead ends: 129 [2022-11-25 15:36:32,334 INFO L226 Difference]: Without dead ends: 117 [2022-11-25 15:36:32,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-11-25 15:36:32,335 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 86 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:32,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 120 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 15:36:32,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-25 15:36:32,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 77. [2022-11-25 15:36:32,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.394736842105263) internal successors, (106), 76 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 106 transitions. [2022-11-25 15:36:32,362 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 106 transitions. Word has length 17 [2022-11-25 15:36:32,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:32,362 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 106 transitions. [2022-11-25 15:36:32,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:32,362 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 106 transitions. [2022-11-25 15:36:32,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 15:36:32,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:32,363 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:32,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 15:36:32,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:32,569 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:32,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:32,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1674725392, now seen corresponding path program 2 times [2022-11-25 15:36:32,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:32,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196773763] [2022-11-25 15:36:32,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:32,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:32,755 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:36:32,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:32,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196773763] [2022-11-25 15:36:32,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196773763] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:32,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703824412] [2022-11-25 15:36:32,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:36:32,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:32,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:32,757 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:32,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 15:36:32,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:36:32,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:36:32,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 15:36:32,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:36:32,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 15:36:32,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703824412] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:32,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:32,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 4] total 13 [2022-11-25 15:36:32,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757778143] [2022-11-25 15:36:32,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:32,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 15:36:32,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:32,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 15:36:32,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-25 15:36:32,933 INFO L87 Difference]: Start difference. First operand 77 states and 106 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:33,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:33,595 INFO L93 Difference]: Finished difference Result 177 states and 240 transitions. [2022-11-25 15:36:33,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 15:36:33,595 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-25 15:36:33,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:33,596 INFO L225 Difference]: With dead ends: 177 [2022-11-25 15:36:33,596 INFO L226 Difference]: Without dead ends: 163 [2022-11-25 15:36:33,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-11-25 15:36:33,597 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 82 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:33,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 352 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 15:36:33,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-25 15:36:33,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 90. [2022-11-25 15:36:33,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.3932584269662922) internal successors, (124), 89 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:33,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 124 transitions. [2022-11-25 15:36:33,648 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 124 transitions. Word has length 19 [2022-11-25 15:36:33,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:33,648 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 124 transitions. [2022-11-25 15:36:33,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:33,649 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 124 transitions. [2022-11-25 15:36:33,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-25 15:36:33,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:33,650 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:33,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 15:36:33,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 15:36:33,855 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:33,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:33,855 INFO L85 PathProgramCache]: Analyzing trace with hash -92433222, now seen corresponding path program 3 times [2022-11-25 15:36:33,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:33,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790797742] [2022-11-25 15:36:33,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:33,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:33,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 15:36:34,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:34,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790797742] [2022-11-25 15:36:34,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790797742] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:34,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193768871] [2022-11-25 15:36:34,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:36:34,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:34,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:34,027 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:34,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 15:36:34,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 15:36:34,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:36:34,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 15:36:34,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 15:36:34,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 15:36:34,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193768871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:34,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:34,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-11-25 15:36:34,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160621836] [2022-11-25 15:36:34,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:34,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:36:34,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:34,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:36:34,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:36:34,159 INFO L87 Difference]: Start difference. First operand 90 states and 124 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:34,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:34,307 INFO L93 Difference]: Finished difference Result 123 states and 164 transitions. [2022-11-25 15:36:34,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:36:34,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-25 15:36:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:34,309 INFO L225 Difference]: With dead ends: 123 [2022-11-25 15:36:34,309 INFO L226 Difference]: Without dead ends: 114 [2022-11-25 15:36:34,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:36:34,310 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:34,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 52 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:36:34,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-25 15:36:34,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2022-11-25 15:36:34,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.3763440860215055) internal successors, (128), 93 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:34,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 128 transitions. [2022-11-25 15:36:34,356 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 128 transitions. Word has length 20 [2022-11-25 15:36:34,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:34,357 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 128 transitions. [2022-11-25 15:36:34,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:34,357 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 128 transitions. [2022-11-25 15:36:34,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-25 15:36:34,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:34,358 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:34,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 15:36:34,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 15:36:34,564 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:34,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:34,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1617038102, now seen corresponding path program 3 times [2022-11-25 15:36:34,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:34,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194035172] [2022-11-25 15:36:34,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:34,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:34,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:34,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194035172] [2022-11-25 15:36:34,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194035172] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:34,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739515901] [2022-11-25 15:36:34,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:36:34,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:34,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:34,774 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:34,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 15:36:34,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 15:36:34,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:36:34,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 15:36:34,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:36:34,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:36:34,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739515901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:34,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:34,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2022-11-25 15:36:34,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048817591] [2022-11-25 15:36:34,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:34,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 15:36:34,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:34,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 15:36:34,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:36:34,969 INFO L87 Difference]: Start difference. First operand 94 states and 128 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:36,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:36,969 INFO L93 Difference]: Finished difference Result 221 states and 292 transitions. [2022-11-25 15:36:36,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-25 15:36:36,970 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-25 15:36:36,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:36,970 INFO L225 Difference]: With dead ends: 221 [2022-11-25 15:36:36,971 INFO L226 Difference]: Without dead ends: 202 [2022-11-25 15:36:36,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=367, Invalid=2603, Unknown=0, NotChecked=0, Total=2970 [2022-11-25 15:36:36,972 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 194 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:36,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 173 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 15:36:36,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-25 15:36:37,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 115. [2022-11-25 15:36:37,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.3596491228070176) internal successors, (155), 114 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:37,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 155 transitions. [2022-11-25 15:36:37,030 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 155 transitions. Word has length 20 [2022-11-25 15:36:37,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:37,031 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 155 transitions. [2022-11-25 15:36:37,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:37,031 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 155 transitions. [2022-11-25 15:36:37,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 15:36:37,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:37,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:37,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 15:36:37,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 15:36:37,239 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:37,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:37,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1969210240, now seen corresponding path program 4 times [2022-11-25 15:36:37,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:37,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536031851] [2022-11-25 15:36:37,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:37,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:36:37,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:37,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536031851] [2022-11-25 15:36:37,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536031851] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:37,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214812047] [2022-11-25 15:36:37,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:36:37,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:37,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:37,791 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:37,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 15:36:37,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:36:37,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:36:37,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 15:36:37,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:36:37,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:36:38,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214812047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:38,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:38,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2022-11-25 15:36:38,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384729174] [2022-11-25 15:36:38,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:38,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 15:36:38,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:38,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 15:36:38,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:36:38,068 INFO L87 Difference]: Start difference. First operand 115 states and 155 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:38,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:38,237 INFO L93 Difference]: Finished difference Result 128 states and 168 transitions. [2022-11-25 15:36:38,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:36:38,237 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-25 15:36:38,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:38,238 INFO L225 Difference]: With dead ends: 128 [2022-11-25 15:36:38,238 INFO L226 Difference]: Without dead ends: 105 [2022-11-25 15:36:38,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-25 15:36:38,239 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:38,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 65 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:36:38,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-25 15:36:38,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-25 15:36:38,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.375) internal successors, (143), 104 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:38,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 143 transitions. [2022-11-25 15:36:38,293 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 143 transitions. Word has length 21 [2022-11-25 15:36:38,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:38,294 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 143 transitions. [2022-11-25 15:36:38,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:38,294 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 143 transitions. [2022-11-25 15:36:38,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 15:36:38,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:38,297 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:38,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 15:36:38,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 15:36:38,503 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:38,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:38,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1698822882, now seen corresponding path program 5 times [2022-11-25 15:36:38,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:38,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023168971] [2022-11-25 15:36:38,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:38,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:36:38,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:38,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023168971] [2022-11-25 15:36:38,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023168971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:38,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641887947] [2022-11-25 15:36:38,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:36:38,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:38,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:38,699 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:38,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 15:36:38,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-25 15:36:38,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:36:38,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 15:36:38,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:36:38,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:36:39,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641887947] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:39,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:39,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-25 15:36:39,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932643272] [2022-11-25 15:36:39,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:39,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 15:36:39,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:39,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 15:36:39,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-11-25 15:36:39,134 INFO L87 Difference]: Start difference. First operand 105 states and 143 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:46,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:46,982 INFO L93 Difference]: Finished difference Result 436 states and 611 transitions. [2022-11-25 15:36:46,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-25 15:36:46,982 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-25 15:36:46,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:46,984 INFO L225 Difference]: With dead ends: 436 [2022-11-25 15:36:46,985 INFO L226 Difference]: Without dead ends: 404 [2022-11-25 15:36:46,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1521, Invalid=4331, Unknown=0, NotChecked=0, Total=5852 [2022-11-25 15:36:46,988 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 668 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:46,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 529 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 15:36:46,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-11-25 15:36:47,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 130. [2022-11-25 15:36:47,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.3953488372093024) internal successors, (180), 129 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:47,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 180 transitions. [2022-11-25 15:36:47,071 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 180 transitions. Word has length 21 [2022-11-25 15:36:47,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:47,071 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 180 transitions. [2022-11-25 15:36:47,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:47,072 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 180 transitions. [2022-11-25 15:36:47,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 15:36:47,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:47,073 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:47,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 15:36:47,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 15:36:47,279 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:47,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:47,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1085075168, now seen corresponding path program 3 times [2022-11-25 15:36:47,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:47,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329821423] [2022-11-25 15:36:47,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:47,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 15:36:47,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:47,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329821423] [2022-11-25 15:36:47,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329821423] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:47,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877811332] [2022-11-25 15:36:47,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:36:47,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:47,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:47,457 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:47,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 15:36:47,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 15:36:47,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:36:47,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 15:36:47,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 15:36:47,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 15:36:47,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877811332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:47,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:47,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2022-11-25 15:36:47,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573187425] [2022-11-25 15:36:47,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:47,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 15:36:47,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:47,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 15:36:47,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-11-25 15:36:47,816 INFO L87 Difference]: Start difference. First operand 130 states and 180 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:48,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:48,694 INFO L93 Difference]: Finished difference Result 245 states and 319 transitions. [2022-11-25 15:36:48,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 15:36:48,695 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-25 15:36:48,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:48,698 INFO L225 Difference]: With dead ends: 245 [2022-11-25 15:36:48,698 INFO L226 Difference]: Without dead ends: 213 [2022-11-25 15:36:48,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 15:36:48,703 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 125 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:48,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 304 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 15:36:48,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-11-25 15:36:48,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 122. [2022-11-25 15:36:48,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.3801652892561984) internal successors, (167), 121 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) [2022-11-25 15:36:48,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 167 transitions. [2022-11-25 15:36:48,762 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 167 transitions. Word has length 23 [2022-11-25 15:36:48,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:48,763 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 167 transitions. [2022-11-25 15:36:48,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:48,763 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 167 transitions. [2022-11-25 15:36:48,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 15:36:48,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:48,764 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:48,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-25 15:36:48,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:48,969 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:48,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:48,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1390241056, now seen corresponding path program 4 times [2022-11-25 15:36:48,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:48,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078448967] [2022-11-25 15:36:48,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:48,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:49,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:49,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078448967] [2022-11-25 15:36:49,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078448967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:49,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218651540] [2022-11-25 15:36:49,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:36:49,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:49,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:49,215 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:49,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 15:36:49,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:36:49,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:36:49,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 15:36:49,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:49,403 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:36:49,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:36:49,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218651540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:49,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:49,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2022-11-25 15:36:49,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583370793] [2022-11-25 15:36:49,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:49,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 15:36:49,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:49,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 15:36:49,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2022-11-25 15:36:49,451 INFO L87 Difference]: Start difference. First operand 122 states and 167 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:53,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:53,669 INFO L93 Difference]: Finished difference Result 291 states and 386 transitions. [2022-11-25 15:36:53,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-25 15:36:53,669 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-25 15:36:53,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:53,671 INFO L225 Difference]: With dead ends: 291 [2022-11-25 15:36:53,671 INFO L226 Difference]: Without dead ends: 276 [2022-11-25 15:36:53,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2162 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=723, Invalid=6417, Unknown=0, NotChecked=0, Total=7140 [2022-11-25 15:36:53,674 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 304 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:53,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 256 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 15:36:53,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-25 15:36:53,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 134. [2022-11-25 15:36:53,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.3759398496240602) internal successors, (183), 133 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:53,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 183 transitions. [2022-11-25 15:36:53,742 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 183 transitions. Word has length 23 [2022-11-25 15:36:53,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:53,742 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 183 transitions. [2022-11-25 15:36:53,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:53,742 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 183 transitions. [2022-11-25 15:36:53,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 15:36:53,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:53,743 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:53,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 15:36:53,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:53,944 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:53,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:53,944 INFO L85 PathProgramCache]: Analyzing trace with hash -699293479, now seen corresponding path program 6 times [2022-11-25 15:36:53,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:53,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475307484] [2022-11-25 15:36:53,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:53,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:54,146 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 15:36:54,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:54,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475307484] [2022-11-25 15:36:54,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475307484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:54,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100400795] [2022-11-25 15:36:54,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:36:54,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:54,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:54,155 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:54,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 15:36:54,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 15:36:54,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:36:54,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 15:36:54,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 15:36:54,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 15:36:54,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100400795] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:54,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:54,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2022-11-25 15:36:54,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899574751] [2022-11-25 15:36:54,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:54,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:36:54,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:54,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:36:54,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:36:54,376 INFO L87 Difference]: Start difference. First operand 134 states and 183 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:54,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:54,687 INFO L93 Difference]: Finished difference Result 214 states and 289 transitions. [2022-11-25 15:36:54,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 15:36:54,688 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-25 15:36:54,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:54,689 INFO L225 Difference]: With dead ends: 214 [2022-11-25 15:36:54,689 INFO L226 Difference]: Without dead ends: 203 [2022-11-25 15:36:54,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-25 15:36:54,692 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 87 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:54,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 111 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:36:54,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-25 15:36:54,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 151. [2022-11-25 15:36:54,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.36) internal successors, (204), 150 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) [2022-11-25 15:36:54,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 204 transitions. [2022-11-25 15:36:54,788 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 204 transitions. Word has length 24 [2022-11-25 15:36:54,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:54,789 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 204 transitions. [2022-11-25 15:36:54,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:54,789 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 204 transitions. [2022-11-25 15:36:54,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 15:36:54,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:54,790 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:54,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 15:36:54,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-25 15:36:54,995 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:54,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:54,996 INFO L85 PathProgramCache]: Analyzing trace with hash -149012133, now seen corresponding path program 4 times [2022-11-25 15:36:54,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:54,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115022312] [2022-11-25 15:36:54,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:54,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:36:55,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:55,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115022312] [2022-11-25 15:36:55,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115022312] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:55,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545253125] [2022-11-25 15:36:55,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:36:55,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:55,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:55,247 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:55,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 15:36:55,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:36:55,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:36:55,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 15:36:55,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:36:55,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:55,595 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-25 15:36:55,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545253125] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:55,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:55,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 7] total 21 [2022-11-25 15:36:55,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795546674] [2022-11-25 15:36:55,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:55,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 15:36:55,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:55,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 15:36:55,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-11-25 15:36:55,597 INFO L87 Difference]: Start difference. First operand 151 states and 204 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:57,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:57,850 INFO L93 Difference]: Finished difference Result 351 states and 471 transitions. [2022-11-25 15:36:57,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-25 15:36:57,850 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-25 15:36:57,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:57,853 INFO L225 Difference]: With dead ends: 351 [2022-11-25 15:36:57,853 INFO L226 Difference]: Without dead ends: 334 [2022-11-25 15:36:57,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=486, Invalid=3054, Unknown=0, NotChecked=0, Total=3540 [2022-11-25 15:36:57,855 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 158 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:57,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 615 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 15:36:57,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-11-25 15:36:57,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 167. [2022-11-25 15:36:57,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.3614457831325302) internal successors, (226), 166 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) [2022-11-25 15:36:57,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 226 transitions. [2022-11-25 15:36:57,991 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 226 transitions. Word has length 24 [2022-11-25 15:36:57,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:57,991 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 226 transitions. [2022-11-25 15:36:57,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:57,991 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 226 transitions. [2022-11-25 15:36:57,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 15:36:57,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:57,993 INFO L195 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:58,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 15:36:58,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:58,198 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:58,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:58,199 INFO L85 PathProgramCache]: Analyzing trace with hash -311562277, now seen corresponding path program 3 times [2022-11-25 15:36:58,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:58,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822069409] [2022-11-25 15:36:58,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:58,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:58,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:58,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822069409] [2022-11-25 15:36:58,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822069409] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:58,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251128626] [2022-11-25 15:36:58,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:36:58,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:58,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:58,521 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:58,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 15:36:58,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-25 15:36:58,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:36:58,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 15:36:58,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:58,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:59,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251128626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:59,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:59,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-11-25 15:36:59,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383792743] [2022-11-25 15:36:59,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:59,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 15:36:59,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:59,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 15:36:59,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 15:36:59,396 INFO L87 Difference]: Start difference. First operand 167 states and 226 transitions. Second operand has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:11,448 WARN L233 SmtUtils]: Spent 5.44s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:38:14,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:38:14,757 INFO L93 Difference]: Finished difference Result 1056 states and 1549 transitions. [2022-11-25 15:38:14,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-25 15:38:14,758 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-25 15:38:14,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:38:14,764 INFO L225 Difference]: With dead ends: 1056 [2022-11-25 15:38:14,764 INFO L226 Difference]: Without dead ends: 1007 [2022-11-25 15:38:14,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 71.7s TimeCoverageRelationStatistics Valid=2158, Invalid=4814, Unknown=0, NotChecked=0, Total=6972 [2022-11-25 15:38:14,770 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 2155 mSDsluCounter, 1525 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2155 SdHoareTripleChecker+Valid, 1633 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-25 15:38:14,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2155 Valid, 1633 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-25 15:38:14,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2022-11-25 15:38:14,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 228. [2022-11-25 15:38:14,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.3700440528634361) internal successors, (311), 227 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:14,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 311 transitions. [2022-11-25 15:38:14,971 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 311 transitions. Word has length 24 [2022-11-25 15:38:14,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:38:14,971 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 311 transitions. [2022-11-25 15:38:14,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:14,971 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 311 transitions. [2022-11-25 15:38:14,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-25 15:38:14,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:38:14,972 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:14,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 15:38:15,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:15,179 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:38:15,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:15,180 INFO L85 PathProgramCache]: Analyzing trace with hash -825436775, now seen corresponding path program 7 times [2022-11-25 15:38:15,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:15,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328286056] [2022-11-25 15:38:15,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:15,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:38:15,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:15,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328286056] [2022-11-25 15:38:15,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328286056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:15,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672978719] [2022-11-25 15:38:15,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:38:15,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:15,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:15,919 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:15,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 15:38:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:15,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 15:38:15,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:38:16,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:38:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:38:16,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672978719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:38:16,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:38:16,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 19 [2022-11-25 15:38:16,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748714045] [2022-11-25 15:38:16,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:38:16,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 15:38:16,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:16,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 15:38:16,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-25 15:38:16,340 INFO L87 Difference]: Start difference. First operand 228 states and 311 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:16,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:38:16,755 INFO L93 Difference]: Finished difference Result 243 states and 326 transitions. [2022-11-25 15:38:16,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 15:38:16,755 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-25 15:38:16,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:38:16,756 INFO L225 Difference]: With dead ends: 243 [2022-11-25 15:38:16,756 INFO L226 Difference]: Without dead ends: 215 [2022-11-25 15:38:16,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-11-25 15:38:16,757 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:38:16,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 97 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 15:38:16,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-11-25 15:38:16,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-11-25 15:38:16,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.3831775700934579) internal successors, (296), 214 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:16,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 296 transitions. [2022-11-25 15:38:16,909 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 296 transitions. Word has length 26 [2022-11-25 15:38:16,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:38:16,909 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 296 transitions. [2022-11-25 15:38:16,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:16,909 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 296 transitions. [2022-11-25 15:38:16,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-25 15:38:16,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:38:16,910 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:16,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 15:38:17,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 15:38:17,116 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:38:17,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:17,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1358585002, now seen corresponding path program 5 times [2022-11-25 15:38:17,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:17,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185803271] [2022-11-25 15:38:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:17,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:17,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:17,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185803271] [2022-11-25 15:38:17,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185803271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:17,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636192775] [2022-11-25 15:38:17,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:38:17,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:17,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:17,471 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:17,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 15:38:17,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-25 15:38:17,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:38:17,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 15:38:17,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:17,691 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:17,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:38:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 15:38:17,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636192775] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:38:17,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:38:17,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 8] total 21 [2022-11-25 15:38:17,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366006818] [2022-11-25 15:38:17,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:38:17,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 15:38:17,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:17,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 15:38:17,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-11-25 15:38:17,846 INFO L87 Difference]: Start difference. First operand 215 states and 296 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:20,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:38:20,037 INFO L93 Difference]: Finished difference Result 506 states and 659 transitions. [2022-11-25 15:38:20,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-25 15:38:20,038 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-25 15:38:20,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:38:20,040 INFO L225 Difference]: With dead ends: 506 [2022-11-25 15:38:20,040 INFO L226 Difference]: Without dead ends: 478 [2022-11-25 15:38:20,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=806, Invalid=3354, Unknown=0, NotChecked=0, Total=4160 [2022-11-25 15:38:20,042 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 263 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 15:38:20,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 348 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 15:38:20,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-11-25 15:38:20,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 235. [2022-11-25 15:38:20,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.393162393162393) internal successors, (326), 234 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:20,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 326 transitions. [2022-11-25 15:38:20,207 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 326 transitions. Word has length 26 [2022-11-25 15:38:20,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:38:20,207 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 326 transitions. [2022-11-25 15:38:20,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:20,208 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 326 transitions. [2022-11-25 15:38:20,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 15:38:20,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:38:20,209 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:20,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 15:38:20,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 15:38:20,415 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:38:20,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:20,415 INFO L85 PathProgramCache]: Analyzing trace with hash -528514310, now seen corresponding path program 6 times [2022-11-25 15:38:20,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:20,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328882561] [2022-11-25 15:38:20,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:20,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:20,705 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 15:38:20,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:20,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328882561] [2022-11-25 15:38:20,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328882561] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:20,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288941559] [2022-11-25 15:38:20,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:38:20,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:20,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:20,711 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:20,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 15:38:20,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-25 15:38:20,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:38:20,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 15:38:20,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:21,016 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 15:38:21,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:38:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 15:38:21,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288941559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:38:21,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:38:21,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 21 [2022-11-25 15:38:21,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444608906] [2022-11-25 15:38:21,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:38:21,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 15:38:21,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:21,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 15:38:21,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2022-11-25 15:38:21,063 INFO L87 Difference]: Start difference. First operand 235 states and 326 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:29,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:38:29,117 INFO L93 Difference]: Finished difference Result 689 states and 835 transitions. [2022-11-25 15:38:29,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-25 15:38:29,118 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-25 15:38:29,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:38:29,120 INFO L225 Difference]: With dead ends: 689 [2022-11-25 15:38:29,120 INFO L226 Difference]: Without dead ends: 660 [2022-11-25 15:38:29,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2538 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=902, Invalid=7654, Unknown=0, NotChecked=0, Total=8556 [2022-11-25 15:38:29,123 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 497 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-25 15:38:29,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 936 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-25 15:38:29,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-11-25 15:38:29,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 268. [2022-11-25 15:38:29,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.400749063670412) internal successors, (374), 267 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:29,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 374 transitions. [2022-11-25 15:38:29,321 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 374 transitions. Word has length 28 [2022-11-25 15:38:29,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:38:29,322 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 374 transitions. [2022-11-25 15:38:29,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:29,322 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 374 transitions. [2022-11-25 15:38:29,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 15:38:29,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:38:29,323 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:29,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-25 15:38:29,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:29,529 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:38:29,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:29,529 INFO L85 PathProgramCache]: Analyzing trace with hash 10818656, now seen corresponding path program 8 times [2022-11-25 15:38:29,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:29,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9077327] [2022-11-25 15:38:29,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:29,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 15:38:29,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:29,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9077327] [2022-11-25 15:38:29,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9077327] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:29,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347165320] [2022-11-25 15:38:29,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:38:29,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:29,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:29,791 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:29,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 15:38:29,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:38:29,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:38:29,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 15:38:29,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-25 15:38:29,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:38:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-25 15:38:30,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347165320] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:38:30,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:38:30,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2022-11-25 15:38:30,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119807563] [2022-11-25 15:38:30,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:38:30,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 15:38:30,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:30,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 15:38:30,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:38:30,035 INFO L87 Difference]: Start difference. First operand 268 states and 374 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:30,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:38:30,825 INFO L93 Difference]: Finished difference Result 398 states and 556 transitions. [2022-11-25 15:38:30,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 15:38:30,826 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 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 29 [2022-11-25 15:38:30,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:38:30,827 INFO L225 Difference]: With dead ends: 398 [2022-11-25 15:38:30,827 INFO L226 Difference]: Without dead ends: 386 [2022-11-25 15:38:30,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-11-25 15:38:30,828 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 144 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:38:30,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 148 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 15:38:30,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-11-25 15:38:31,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 291. [2022-11-25 15:38:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.4241379310344828) internal successors, (413), 290 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:31,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 413 transitions. [2022-11-25 15:38:31,032 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 413 transitions. Word has length 29 [2022-11-25 15:38:31,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:38:31,033 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 413 transitions. [2022-11-25 15:38:31,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:31,033 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 413 transitions. [2022-11-25 15:38:31,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 15:38:31,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:38:31,033 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:31,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 15:38:31,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 15:38:31,234 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:38:31,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:31,235 INFO L85 PathProgramCache]: Analyzing trace with hash 753826464, now seen corresponding path program 7 times [2022-11-25 15:38:31,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:31,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508784043] [2022-11-25 15:38:31,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:31,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:31,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:31,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508784043] [2022-11-25 15:38:31,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508784043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:31,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532629796] [2022-11-25 15:38:31,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:38:31,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:31,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:31,627 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:31,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 15:38:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:31,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 15:38:31,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 15:38:31,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:38:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 15:38:32,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532629796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:38:32,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:38:32,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2022-11-25 15:38:32,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664005258] [2022-11-25 15:38:32,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:38:32,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 15:38:32,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:32,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 15:38:32,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2022-11-25 15:38:32,006 INFO L87 Difference]: Start difference. First operand 291 states and 413 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:52,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:38:52,088 INFO L93 Difference]: Finished difference Result 566 states and 755 transitions. [2022-11-25 15:38:52,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-11-25 15:38:52,089 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 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 29 [2022-11-25 15:38:52,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:38:52,091 INFO L225 Difference]: With dead ends: 566 [2022-11-25 15:38:52,091 INFO L226 Difference]: Without dead ends: 550 [2022-11-25 15:38:52,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8987 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=1875, Invalid=23247, Unknown=0, NotChecked=0, Total=25122 [2022-11-25 15:38:52,098 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 521 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 2283 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 2611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 2283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-25 15:38:52,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 370 Invalid, 2611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 2283 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-25 15:38:52,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-11-25 15:38:52,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 302. [2022-11-25 15:38:52,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 1.398671096345515) internal successors, (421), 301 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:52,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 421 transitions. [2022-11-25 15:38:52,454 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 421 transitions. Word has length 29 [2022-11-25 15:38:52,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:38:52,455 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 421 transitions. [2022-11-25 15:38:52,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:52,455 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 421 transitions. [2022-11-25 15:38:52,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 15:38:52,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:38:52,456 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:52,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 15:38:52,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:52,662 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:38:52,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:52,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1432259938, now seen corresponding path program 9 times [2022-11-25 15:38:52,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:52,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634513977] [2022-11-25 15:38:52,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:52,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:38:53,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:53,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634513977] [2022-11-25 15:38:53,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634513977] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:53,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599390176] [2022-11-25 15:38:53,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:38:53,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:53,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:53,119 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:53,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 15:38:53,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-25 15:38:53,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:38:53,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 15:38:53,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:38:53,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:38:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:38:54,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599390176] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:38:54,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:38:54,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2022-11-25 15:38:54,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372178576] [2022-11-25 15:38:54,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:38:54,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-25 15:38:54,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:54,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-25 15:38:54,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 15:38:54,296 INFO L87 Difference]: Start difference. First operand 302 states and 421 transitions. Second operand has 37 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:08,436 WARN L233 SmtUtils]: Spent 7.84s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:39:19,655 WARN L233 SmtUtils]: Spent 7.85s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:39:36,537 WARN L233 SmtUtils]: Spent 11.33s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:39:45,777 WARN L233 SmtUtils]: Spent 5.61s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:39:57,258 WARN L233 SmtUtils]: Spent 6.84s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:40:08,390 WARN L233 SmtUtils]: Spent 8.70s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:40:26,576 WARN L233 SmtUtils]: Spent 9.51s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:40:36,060 WARN L233 SmtUtils]: Spent 6.90s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:40:52,019 WARN L233 SmtUtils]: Spent 9.38s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:41:02,068 WARN L233 SmtUtils]: Spent 5.56s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:41:23,782 WARN L233 SmtUtils]: Spent 5.46s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:41:32,854 WARN L233 SmtUtils]: Spent 5.41s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:41:53,614 WARN L233 SmtUtils]: Spent 5.14s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:42:29,827 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:43:49,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 15:43:51,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 15:43:52,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 15:43:54,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:43:54,797 INFO L93 Difference]: Finished difference Result 1463 states and 2161 transitions. [2022-11-25 15:43:54,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-11-25 15:43:54,797 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 states have internal predecessors, (62), 0 states have call successors, (0), 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 29 [2022-11-25 15:43:54,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:43:54,802 INFO L225 Difference]: With dead ends: 1463 [2022-11-25 15:43:54,802 INFO L226 Difference]: Without dead ends: 1409 [2022-11-25 15:43:54,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10203 ImplicationChecksByTransitivity, 288.3s TimeCoverageRelationStatistics Valid=7107, Invalid=19297, Unknown=2, NotChecked=0, Total=26406 [2022-11-25 15:43:54,806 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 2445 mSDsluCounter, 1831 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2445 SdHoareTripleChecker+Valid, 1949 SdHoareTripleChecker+Invalid, 2271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:43:54,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2445 Valid, 1949 Invalid, 2271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 1393 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time] [2022-11-25 15:43:54,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2022-11-25 15:43:55,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 336. [2022-11-25 15:43:55,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.408955223880597) internal successors, (472), 335 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:55,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 472 transitions. [2022-11-25 15:43:55,146 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 472 transitions. Word has length 29 [2022-11-25 15:43:55,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:43:55,147 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 472 transitions. [2022-11-25 15:43:55,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:55,147 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 472 transitions. [2022-11-25 15:43:55,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-25 15:43:55,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:43:55,148 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:55,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 15:43:55,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 15:43:55,354 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:43:55,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:55,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1845062752, now seen corresponding path program 10 times [2022-11-25 15:43:55,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:55,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146820067] [2022-11-25 15:43:55,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:55,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:43:56,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:56,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146820067] [2022-11-25 15:43:56,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146820067] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:43:56,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876695898] [2022-11-25 15:43:56,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:43:56,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:56,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:43:56,171 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:43:56,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 15:43:56,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:43:56,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:43:56,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-25 15:43:56,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:43:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:43:56,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:43:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:43:56,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876695898] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:43:56,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:43:56,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 23 [2022-11-25 15:43:56,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445961696] [2022-11-25 15:43:56,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:43:56,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 15:43:56,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:56,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 15:43:56,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-11-25 15:43:56,663 INFO L87 Difference]: Start difference. First operand 336 states and 472 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:57,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:43:57,417 INFO L93 Difference]: Finished difference Result 353 states and 489 transitions. [2022-11-25 15:43:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 15:43:57,417 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 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 31 [2022-11-25 15:43:57,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:43:57,418 INFO L225 Difference]: With dead ends: 353 [2022-11-25 15:43:57,419 INFO L226 Difference]: Without dead ends: 320 [2022-11-25 15:43:57,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-11-25 15:43:57,419 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:43:57,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 121 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 15:43:57,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-25 15:43:57,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2022-11-25 15:43:57,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.4231974921630095) internal successors, (454), 319 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:57,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 454 transitions. [2022-11-25 15:43:57,688 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 454 transitions. Word has length 31 [2022-11-25 15:43:57,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:43:57,688 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 454 transitions. [2022-11-25 15:43:57,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:57,688 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 454 transitions. [2022-11-25 15:43:57,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-25 15:43:57,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:43:57,689 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:57,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-25 15:43:57,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 15:43:57,895 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:43:57,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:57,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1247012492, now seen corresponding path program 5 times [2022-11-25 15:43:57,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:57,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358188121] [2022-11-25 15:43:57,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:57,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-25 15:43:58,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:58,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358188121] [2022-11-25 15:43:58,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358188121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:43:58,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874852767] [2022-11-25 15:43:58,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:43:58,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:58,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:43:58,231 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:43:58,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 15:43:58,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-25 15:43:58,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:43:58,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 15:43:58,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:43:59,034 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-25 15:43:59,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:43:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-25 15:43:59,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874852767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:43:59,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:43:59,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 38 [2022-11-25 15:43:59,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397723896] [2022-11-25 15:43:59,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:43:59,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 15:43:59,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:59,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 15:43:59,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 15:43:59,556 INFO L87 Difference]: Start difference. First operand 320 states and 454 transitions. Second operand has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:13,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:44:13,080 INFO L93 Difference]: Finished difference Result 638 states and 823 transitions. [2022-11-25 15:44:13,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-11-25 15:44:13,081 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-25 15:44:13,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:44:13,082 INFO L225 Difference]: With dead ends: 638 [2022-11-25 15:44:13,083 INFO L226 Difference]: Without dead ends: 534 [2022-11-25 15:44:13,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2249 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=795, Invalid=8135, Unknown=0, NotChecked=0, Total=8930 [2022-11-25 15:44:13,099 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 383 mSDsluCounter, 1373 mSDsCounter, 0 mSdLazyCounter, 1766 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 1974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-25 15:44:13,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 1449 Invalid, 1974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1766 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-25 15:44:13,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-11-25 15:44:13,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 305. [2022-11-25 15:44:13,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.381578947368421) internal successors, (420), 304 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:13,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 420 transitions. [2022-11-25 15:44:13,407 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 420 transitions. Word has length 32 [2022-11-25 15:44:13,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:44:13,407 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 420 transitions. [2022-11-25 15:44:13,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:13,407 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 420 transitions. [2022-11-25 15:44:13,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-25 15:44:13,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:44:13,408 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:13,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 15:44:13,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:13,608 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:44:13,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:13,609 INFO L85 PathProgramCache]: Analyzing trace with hash -647695254, now seen corresponding path program 8 times [2022-11-25 15:44:13,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:13,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81418196] [2022-11-25 15:44:13,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:13,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:44:14,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:14,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81418196] [2022-11-25 15:44:14,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81418196] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:44:14,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325196438] [2022-11-25 15:44:14,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:44:14,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:14,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:14,061 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:44:14,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 15:44:14,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:44:14,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:44:14,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 15:44:14,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:44:14,377 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 15:44:14,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:44:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 15:44:14,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325196438] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:44:14,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:44:14,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 27 [2022-11-25 15:44:14,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89858307] [2022-11-25 15:44:14,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:44:14,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 15:44:14,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:14,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 15:44:14,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2022-11-25 15:44:14,433 INFO L87 Difference]: Start difference. First operand 305 states and 420 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:00,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:45:00,252 INFO L93 Difference]: Finished difference Result 712 states and 940 transitions. [2022-11-25 15:45:00,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2022-11-25 15:45:00,253 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-25 15:45:00,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:45:00,255 INFO L225 Difference]: With dead ends: 712 [2022-11-25 15:45:00,255 INFO L226 Difference]: Without dead ends: 689 [2022-11-25 15:45:00,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19793 ImplicationChecksByTransitivity, 37.3s TimeCoverageRelationStatistics Valid=3172, Invalid=48130, Unknown=0, NotChecked=0, Total=51302 [2022-11-25 15:45:00,259 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 762 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 3506 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 4048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 3506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-25 15:45:00,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 541 Invalid, 4048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 3506 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-11-25 15:45:00,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-11-25 15:45:00,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 344. [2022-11-25 15:45:00,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 1.3877551020408163) internal successors, (476), 343 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:00,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 476 transitions. [2022-11-25 15:45:00,591 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 476 transitions. Word has length 32 [2022-11-25 15:45:00,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:45:00,591 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 476 transitions. [2022-11-25 15:45:00,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:00,591 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 476 transitions. [2022-11-25 15:45:00,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-25 15:45:00,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:45:00,592 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:00,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-25 15:45:00,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:00,798 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:45:00,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:00,798 INFO L85 PathProgramCache]: Analyzing trace with hash 59915840, now seen corresponding path program 6 times [2022-11-25 15:45:00,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:00,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733331023] [2022-11-25 15:45:00,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:00,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:01,073 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-25 15:45:01,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:01,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733331023] [2022-11-25 15:45:01,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733331023] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:45:01,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436248177] [2022-11-25 15:45:01,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:45:01,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:01,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:45:01,076 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:45:01,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-25 15:45:01,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-25 15:45:01,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:45:01,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 15:45:01,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:45:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-25 15:45:01,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:45:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-25 15:45:01,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436248177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:45:01,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:45:01,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 27 [2022-11-25 15:45:01,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457806520] [2022-11-25 15:45:01,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:45:01,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 15:45:01,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:01,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 15:45:01,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-11-25 15:45:01,648 INFO L87 Difference]: Start difference. First operand 344 states and 476 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:05,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:45:05,779 INFO L93 Difference]: Finished difference Result 644 states and 828 transitions. [2022-11-25 15:45:05,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-25 15:45:05,779 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-25 15:45:05,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:45:05,782 INFO L225 Difference]: With dead ends: 644 [2022-11-25 15:45:05,782 INFO L226 Difference]: Without dead ends: 573 [2022-11-25 15:45:05,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=493, Invalid=4063, Unknown=0, NotChecked=0, Total=4556 [2022-11-25 15:45:05,784 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 180 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 15:45:05,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 976 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 15:45:05,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-11-25 15:45:06,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 348. [2022-11-25 15:45:06,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 1.3573487031700289) internal successors, (471), 347 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:06,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 471 transitions. [2022-11-25 15:45:06,091 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 471 transitions. Word has length 33 [2022-11-25 15:45:06,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:45:06,091 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 471 transitions. [2022-11-25 15:45:06,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:06,092 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 471 transitions. [2022-11-25 15:45:06,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-25 15:45:06,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:45:06,093 INFO L195 NwaCegarLoop]: trace histogram [15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:06,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-25 15:45:06,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:06,299 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:45:06,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:06,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1513357582, now seen corresponding path program 11 times [2022-11-25 15:45:06,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:06,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145022417] [2022-11-25 15:45:06,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:06,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 15:45:06,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:06,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145022417] [2022-11-25 15:45:06,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145022417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:45:06,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092862355] [2022-11-25 15:45:06,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:45:06,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:06,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:45:06,753 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:45:06,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-25 15:45:07,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-25 15:45:07,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:45:07,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 15:45:07,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:45:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:45:07,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:45:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-25 15:45:07,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092862355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:45:07,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:45:07,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 5] total 27 [2022-11-25 15:45:07,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487881571] [2022-11-25 15:45:07,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:45:07,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 15:45:07,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:07,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 15:45:07,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-11-25 15:45:07,986 INFO L87 Difference]: Start difference. First operand 348 states and 471 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:12,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:45:12,701 INFO L93 Difference]: Finished difference Result 838 states and 1098 transitions. [2022-11-25 15:45:12,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-11-25 15:45:12,702 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-25 15:45:12,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:45:12,704 INFO L225 Difference]: With dead ends: 838 [2022-11-25 15:45:12,704 INFO L226 Difference]: Without dead ends: 796 [2022-11-25 15:45:12,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=655, Invalid=10901, Unknown=0, NotChecked=0, Total=11556 [2022-11-25 15:45:12,705 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 212 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 2634 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 2804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 2634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-25 15:45:12,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 1800 Invalid, 2804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 2634 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-25 15:45:12,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-11-25 15:45:13,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 368. [2022-11-25 15:45:13,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.348773841961853) internal successors, (495), 367 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:13,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 495 transitions. [2022-11-25 15:45:13,072 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 495 transitions. Word has length 33 [2022-11-25 15:45:13,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:45:13,072 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 495 transitions. [2022-11-25 15:45:13,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:13,072 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 495 transitions. [2022-11-25 15:45:13,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-25 15:45:13,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:45:13,073 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:13,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-25 15:45:13,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-25 15:45:13,273 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:45:13,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:13,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1552700359, now seen corresponding path program 12 times [2022-11-25 15:45:13,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:13,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347907278] [2022-11-25 15:45:13,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:13,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 15:45:13,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:13,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347907278] [2022-11-25 15:45:13,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347907278] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:45:13,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051960785] [2022-11-25 15:45:13,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:45:13,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:13,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:45:13,489 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:45:13,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-25 15:45:13,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-25 15:45:13,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:45:13,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 15:45:13,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:45:13,741 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 15:45:13,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:45:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 15:45:13,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051960785] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:45:13,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:45:13,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-11-25 15:45:13,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938568313] [2022-11-25 15:45:13,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:45:13,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 15:45:13,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:13,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 15:45:13,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:45:13,776 INFO L87 Difference]: Start difference. First operand 368 states and 495 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:15,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:45:15,475 INFO L93 Difference]: Finished difference Result 698 states and 976 transitions. [2022-11-25 15:45:15,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 15:45:15,476 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-25 15:45:15,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:45:15,477 INFO L225 Difference]: With dead ends: 698 [2022-11-25 15:45:15,477 INFO L226 Difference]: Without dead ends: 678 [2022-11-25 15:45:15,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2022-11-25 15:45:15,478 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 257 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:45:15,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 182 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 15:45:15,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-11-25 15:45:16,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 530. [2022-11-25 15:45:16,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 1.4102079395085065) internal successors, (746), 529 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:16,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 746 transitions. [2022-11-25 15:45:16,194 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 746 transitions. Word has length 34 [2022-11-25 15:45:16,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:45:16,194 INFO L495 AbstractCegarLoop]: Abstraction has 530 states and 746 transitions. [2022-11-25 15:45:16,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:16,195 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 746 transitions. [2022-11-25 15:45:16,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 15:45:16,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:45:16,196 INFO L195 NwaCegarLoop]: trace histogram [16, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:16,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-25 15:45:16,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:16,402 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:45:16,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:16,402 INFO L85 PathProgramCache]: Analyzing trace with hash -526309600, now seen corresponding path program 13 times [2022-11-25 15:45:16,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:16,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562380083] [2022-11-25 15:45:16,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:16,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 15:45:16,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:16,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562380083] [2022-11-25 15:45:16,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562380083] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:45:16,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938439064] [2022-11-25 15:45:16,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:45:16,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:16,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:45:16,919 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:45:16,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_383f94b3-50e3-485a-a18e-0147f8ecfff2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-25 15:45:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:16,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 15:45:16,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:45:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 15:45:17,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:45:17,867 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 15:45:17,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938439064] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:45:17,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:45:17,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 43 [2022-11-25 15:45:17,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089937803] [2022-11-25 15:45:17,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:45:17,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 15:45:17,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:17,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 15:45:17,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1422, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 15:45:17,869 INFO L87 Difference]: Start difference. First operand 530 states and 746 transitions. Second operand has 43 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:37,986 WARN L233 SmtUtils]: Spent 8.30s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:45:56,464 WARN L233 SmtUtils]: Spent 9.51s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:46:33,524 WARN L233 SmtUtils]: Spent 22.93s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:46:52,724 WARN L233 SmtUtils]: Spent 11.18s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:47:15,347 WARN L233 SmtUtils]: Spent 14.15s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:47:47,175 WARN L233 SmtUtils]: Spent 24.42s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:48:00,480 WARN L233 SmtUtils]: Spent 6.27s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:48:31,467 WARN L233 SmtUtils]: Spent 15.41s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:48:58,048 WARN L233 SmtUtils]: Spent 18.83s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:49:28,948 WARN L233 SmtUtils]: Spent 15.81s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:49:59,387 WARN L233 SmtUtils]: Spent 12.79s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:50:16,239 WARN L233 SmtUtils]: Spent 11.12s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:50:35,530 WARN L233 SmtUtils]: Spent 10.70s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:51:06,103 WARN L233 SmtUtils]: Spent 16.52s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)