./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/mlceu.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/mlceu.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0d3cc2e7af8cdfad5003daafcde8bd8bcf193cd0b5d066a7a9bad715ddc9d422 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 22:16:21,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 22:16:21,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 22:16:21,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 22:16:21,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 22:16:21,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 22:16:21,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 22:16:21,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 22:16:21,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 22:16:21,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 22:16:21,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 22:16:21,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 22:16:21,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 22:16:21,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 22:16:21,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 22:16:21,681 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 22:16:21,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 22:16:21,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 22:16:21,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 22:16:21,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 22:16:21,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 22:16:21,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 22:16:21,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 22:16:21,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 22:16:21,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 22:16:21,707 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 22:16:21,707 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 22:16:21,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 22:16:21,709 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 22:16:21,710 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 22:16:21,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 22:16:21,712 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 22:16:21,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 22:16:21,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 22:16:21,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 22:16:21,715 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 22:16:21,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 22:16:21,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 22:16:21,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 22:16:21,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 22:16:21,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 22:16:21,718 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 22:16:21,738 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 22:16:21,739 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 22:16:21,739 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 22:16:21,739 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 22:16:21,739 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 22:16:21,739 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 22:16:21,740 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 22:16:21,740 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 22:16:21,740 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 22:16:21,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 22:16:21,740 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 22:16:21,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 22:16:21,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 22:16:21,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 22:16:21,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 22:16:21,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 22:16:21,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 22:16:21,741 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 22:16:21,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 22:16:21,741 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 22:16:21,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 22:16:21,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 22:16:21,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 22:16:21,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 22:16:21,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:16:21,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 22:16:21,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 22:16:21,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 22:16:21,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 22:16:21,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 22:16:21,742 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 22:16:21,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 22:16:21,742 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 22:16:21,742 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 22:16:21,742 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 22:16:21,742 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_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d3cc2e7af8cdfad5003daafcde8bd8bcf193cd0b5d066a7a9bad715ddc9d422 [2022-12-13 22:16:21,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 22:16:21,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 22:16:21,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 22:16:21,918 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 22:16:21,918 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 22:16:21,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-tiling/mlceu.c [2022-12-13 22:16:24,490 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 22:16:24,629 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 22:16:24,629 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/sv-benchmarks/c/array-tiling/mlceu.c [2022-12-13 22:16:24,634 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/data/a17dc1fc5/815634f133c5482a92cd34a28539787e/FLAG1946737da [2022-12-13 22:16:24,649 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/data/a17dc1fc5/815634f133c5482a92cd34a28539787e [2022-12-13 22:16:24,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 22:16:24,653 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 22:16:24,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 22:16:24,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 22:16:24,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 22:16:24,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:16:24" (1/1) ... [2022-12-13 22:16:24,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b6bf90a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:16:24, skipping insertion in model container [2022-12-13 22:16:24,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:16:24" (1/1) ... [2022-12-13 22:16:24,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 22:16:24,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 22:16:24,798 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_12592667-4bfd-4d20-959d-83e92acdf686/sv-benchmarks/c/array-tiling/mlceu.c[396,409] [2022-12-13 22:16:24,811 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:16:24,820 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 22:16:24,833 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_12592667-4bfd-4d20-959d-83e92acdf686/sv-benchmarks/c/array-tiling/mlceu.c[396,409] [2022-12-13 22:16:24,837 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:16:24,848 INFO L208 MainTranslator]: Completed translation [2022-12-13 22:16:24,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:16:24 WrapperNode [2022-12-13 22:16:24,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 22:16:24,849 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 22:16:24,849 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 22:16:24,850 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 22:16:24,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:16:24" (1/1) ... [2022-12-13 22:16:24,860 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:16:24" (1/1) ... [2022-12-13 22:16:24,872 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2022-12-13 22:16:24,872 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 22:16:24,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 22:16:24,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 22:16:24,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 22:16:24,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:16:24" (1/1) ... [2022-12-13 22:16:24,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:16:24" (1/1) ... [2022-12-13 22:16:24,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:16:24" (1/1) ... [2022-12-13 22:16:24,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:16:24" (1/1) ... [2022-12-13 22:16:24,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:16:24" (1/1) ... [2022-12-13 22:16:24,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:16:24" (1/1) ... [2022-12-13 22:16:24,886 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:16:24" (1/1) ... [2022-12-13 22:16:24,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:16:24" (1/1) ... [2022-12-13 22:16:24,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 22:16:24,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 22:16:24,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 22:16:24,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 22:16:24,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:16:24" (1/1) ... [2022-12-13 22:16:24,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:16:24,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:16:24,914 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 22:16:24,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 22:16:24,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 22:16:24,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 22:16:24,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 22:16:24,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 22:16:24,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 22:16:24,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 22:16:24,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 22:16:25,003 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 22:16:25,004 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 22:16:25,100 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 22:16:25,104 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 22:16:25,104 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 22:16:25,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:16:25 BoogieIcfgContainer [2022-12-13 22:16:25,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 22:16:25,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 22:16:25,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 22:16:25,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 22:16:25,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 10:16:24" (1/3) ... [2022-12-13 22:16:25,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@267a20c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:16:25, skipping insertion in model container [2022-12-13 22:16:25,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:16:24" (2/3) ... [2022-12-13 22:16:25,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@267a20c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:16:25, skipping insertion in model container [2022-12-13 22:16:25,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:16:25" (3/3) ... [2022-12-13 22:16:25,113 INFO L112 eAbstractionObserver]: Analyzing ICFG mlceu.c [2022-12-13 22:16:25,127 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 22:16:25,127 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 22:16:25,162 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:16:25,167 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;@e931179, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:16:25,167 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 22:16:25,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:25,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 22:16:25,174 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:16:25,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:25,175 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:16:25,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:25,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1096717866, now seen corresponding path program 1 times [2022-12-13 22:16:25,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:25,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182969395] [2022-12-13 22:16:25,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:25,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:25,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:25,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:25,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182969395] [2022-12-13 22:16:25,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182969395] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:16:25,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:16:25,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:16:25,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603488367] [2022-12-13 22:16:25,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:16:25,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 22:16:25,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:16:25,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 22:16:25,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 22:16:25,321 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:25,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:16:25,332 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2022-12-13 22:16:25,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 22:16:25,334 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-12-13 22:16:25,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:16:25,339 INFO L225 Difference]: With dead ends: 34 [2022-12-13 22:16:25,339 INFO L226 Difference]: Without dead ends: 15 [2022-12-13 22:16:25,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 22:16:25,344 INFO L413 NwaCegarLoop]: 22 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, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:16:25,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:16:25,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-13 22:16:25,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-13 22:16:25,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:25,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-12-13 22:16:25,368 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2022-12-13 22:16:25,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:16:25,368 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-12-13 22:16:25,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:25,368 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-12-13 22:16:25,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 22:16:25,369 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:16:25,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:25,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 22:16:25,369 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:16:25,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:25,370 INFO L85 PathProgramCache]: Analyzing trace with hash 678289496, now seen corresponding path program 1 times [2022-12-13 22:16:25,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:25,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372244771] [2022-12-13 22:16:25,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:25,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:25,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:25,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372244771] [2022-12-13 22:16:25,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372244771] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:16:25,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:16:25,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 22:16:25,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579654491] [2022-12-13 22:16:25,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:16:25,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:16:25,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:16:25,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:16:25,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:16:25,487 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:25,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:16:25,526 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-12-13 22:16:25,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:16:25,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-12-13 22:16:25,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:16:25,527 INFO L225 Difference]: With dead ends: 34 [2022-12-13 22:16:25,527 INFO L226 Difference]: Without dead ends: 24 [2022-12-13 22:16:25,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:16:25,529 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:16:25,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 15 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:16:25,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-13 22:16:25,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2022-12-13 22:16:25,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 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) [2022-12-13 22:16:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-12-13 22:16:25,533 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2022-12-13 22:16:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:16:25,533 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-12-13 22:16:25,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-12-13 22:16:25,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 22:16:25,534 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:16:25,534 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:25,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 22:16:25,534 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:16:25,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:25,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1190752748, now seen corresponding path program 1 times [2022-12-13 22:16:25,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:25,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989834753] [2022-12-13 22:16:25,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:25,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:25,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:25,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989834753] [2022-12-13 22:16:25,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989834753] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:16:25,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425471929] [2022-12-13 22:16:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:25,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:25,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:16:25,911 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:16:25,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 22:16:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:25,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 22:16:25,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:16:26,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 22:16:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:26,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:16:26,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-13 22:16:26,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-13 22:16:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:26,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425471929] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:16:26,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:16:26,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-12-13 22:16:26,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049811461] [2022-12-13 22:16:26,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:16:26,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 22:16:26,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:16:26,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 22:16:26,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-13 22:16:26,143 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:26,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:16:26,229 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-12-13 22:16:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 22:16:26,230 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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 13 [2022-12-13 22:16:26,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:16:26,230 INFO L225 Difference]: With dead ends: 26 [2022-12-13 22:16:26,231 INFO L226 Difference]: Without dead ends: 24 [2022-12-13 22:16:26,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-12-13 22:16:26,232 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:16:26,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 46 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:16:26,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-13 22:16:26,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2022-12-13 22:16:26,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:26,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-12-13 22:16:26,236 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2022-12-13 22:16:26,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:16:26,237 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-12-13 22:16:26,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:26,237 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-12-13 22:16:26,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 22:16:26,238 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:16:26,238 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:26,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 22:16:26,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:26,441 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:16:26,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:26,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1891500962, now seen corresponding path program 1 times [2022-12-13 22:16:26,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:26,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029955393] [2022-12-13 22:16:26,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:26,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:26,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:26,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029955393] [2022-12-13 22:16:26,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029955393] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:16:26,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861758854] [2022-12-13 22:16:26,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:26,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:26,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:16:26,632 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:16:26,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 22:16:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:26,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 22:16:26,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:16:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:26,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:16:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:26,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861758854] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:16:26,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:16:26,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-13 22:16:26,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697958806] [2022-12-13 22:16:26,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:16:26,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 22:16:26,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:16:26,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 22:16:26,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-13 22:16:26,772 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:26,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:16:26,833 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-12-13 22:16:26,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 22:16:26,833 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 17 [2022-12-13 22:16:26,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:16:26,834 INFO L225 Difference]: With dead ends: 49 [2022-12-13 22:16:26,834 INFO L226 Difference]: Without dead ends: 31 [2022-12-13 22:16:26,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-12-13 22:16:26,836 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:16:26,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 45 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:16:26,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-13 22:16:26,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2022-12-13 22:16:26,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:26,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-12-13 22:16:26,839 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2022-12-13 22:16:26,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:16:26,839 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-12-13 22:16:26,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:26,839 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-12-13 22:16:26,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-13 22:16:26,840 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:16:26,840 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:26,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 22:16:27,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:27,042 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:16:27,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:27,044 INFO L85 PathProgramCache]: Analyzing trace with hash -2006236274, now seen corresponding path program 2 times [2022-12-13 22:16:27,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:27,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639026532] [2022-12-13 22:16:27,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:27,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:27,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:27,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639026532] [2022-12-13 22:16:27,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639026532] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:16:27,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837952570] [2022-12-13 22:16:27,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:16:27,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:27,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:16:27,394 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:16:27,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 22:16:27,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:16:27,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:16:27,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 22:16:27,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:16:27,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-13 22:16:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:27,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:16:27,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-12-13 22:16:27,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-12-13 22:16:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:27,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837952570] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:16:27,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:16:27,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-12-13 22:16:27,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868288132] [2022-12-13 22:16:27,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:16:27,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 22:16:27,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:16:27,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 22:16:27,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-12-13 22:16:27,640 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:27,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:16:27,863 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-12-13 22:16:27,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 22:16:27,863 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-13 22:16:27,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:16:27,864 INFO L225 Difference]: With dead ends: 33 [2022-12-13 22:16:27,864 INFO L226 Difference]: Without dead ends: 31 [2022-12-13 22:16:27,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2022-12-13 22:16:27,865 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:16:27,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 60 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:16:27,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-13 22:16:27,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2022-12-13 22:16:27,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:27,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-12-13 22:16:27,872 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 20 [2022-12-13 22:16:27,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:16:27,872 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-12-13 22:16:27,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:27,873 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-12-13 22:16:27,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 22:16:27,874 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:16:27,874 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:27,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 22:16:28,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:28,075 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:16:28,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:28,076 INFO L85 PathProgramCache]: Analyzing trace with hash 466236484, now seen corresponding path program 3 times [2022-12-13 22:16:28,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:28,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010012770] [2022-12-13 22:16:28,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:28,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:28,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:28,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010012770] [2022-12-13 22:16:28,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010012770] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:16:28,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629865378] [2022-12-13 22:16:28,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:16:28,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:28,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:16:28,264 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:16:28,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 22:16:28,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 22:16:28,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:16:28,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 22:16:28,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:16:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:28,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:16:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:28,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629865378] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:16:28,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:16:28,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-13 22:16:28,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220650145] [2022-12-13 22:16:28,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:16:28,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 22:16:28,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:16:28,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 22:16:28,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-12-13 22:16:28,431 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-12-13 22:16:28,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:16:28,497 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-12-13 22:16:28,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 22:16:28,498 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 [2022-12-13 22:16:28,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:16:28,498 INFO L225 Difference]: With dead ends: 64 [2022-12-13 22:16:28,498 INFO L226 Difference]: Without dead ends: 38 [2022-12-13 22:16:28,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-12-13 22:16:28,499 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:16:28,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 55 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:16:28,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-13 22:16:28,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2022-12-13 22:16:28,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:28,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-12-13 22:16:28,503 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2022-12-13 22:16:28,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:16:28,503 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-12-13 22:16:28,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-12-13 22:16:28,503 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-12-13 22:16:28,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 22:16:28,504 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:16:28,504 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:28,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 22:16:28,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:28,705 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:16:28,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:28,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1524796712, now seen corresponding path program 4 times [2022-12-13 22:16:28,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:28,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731880992] [2022-12-13 22:16:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:28,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:29,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:29,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731880992] [2022-12-13 22:16:29,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731880992] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:16:29,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701928687] [2022-12-13 22:16:29,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 22:16:29,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:29,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:16:29,056 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:16:29,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 22:16:29,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 22:16:29,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:16:29,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 22:16:29,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:16:29,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 22:16:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:29,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:16:29,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-12-13 22:16:29,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-12-13 22:16:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:29,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701928687] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:16:29,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:16:29,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 23 [2022-12-13 22:16:29,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594539542] [2022-12-13 22:16:29,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:16:29,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 22:16:29,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:16:29,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 22:16:29,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-12-13 22:16:29,354 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:29,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:16:29,634 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-12-13 22:16:29,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 22:16:29,634 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-13 22:16:29,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:16:29,635 INFO L225 Difference]: With dead ends: 40 [2022-12-13 22:16:29,635 INFO L226 Difference]: Without dead ends: 38 [2022-12-13 22:16:29,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 22:16:29,637 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:16:29,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 100 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:16:29,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-13 22:16:29,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2022-12-13 22:16:29,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:29,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-12-13 22:16:29,644 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2022-12-13 22:16:29,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:16:29,644 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-12-13 22:16:29,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:29,644 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-12-13 22:16:29,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 22:16:29,645 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:16:29,645 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:29,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 22:16:29,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 22:16:29,846 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:16:29,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:29,846 INFO L85 PathProgramCache]: Analyzing trace with hash 702525070, now seen corresponding path program 5 times [2022-12-13 22:16:29,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:29,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601391189] [2022-12-13 22:16:29,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:29,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:29,997 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:29,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:29,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601391189] [2022-12-13 22:16:29,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601391189] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:16:29,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083378074] [2022-12-13 22:16:29,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 22:16:29,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:29,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:16:29,999 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:16:29,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 22:16:30,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 22:16:30,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:16:30,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 22:16:30,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:16:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:30,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:16:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:30,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083378074] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:16:30,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:16:30,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-12-13 22:16:30,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720270269] [2022-12-13 22:16:30,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:16:30,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 22:16:30,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:16:30,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 22:16:30,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-12-13 22:16:30,201 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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) [2022-12-13 22:16:30,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:16:30,293 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2022-12-13 22:16:30,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 22:16:30,294 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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 31 [2022-12-13 22:16:30,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:16:30,294 INFO L225 Difference]: With dead ends: 79 [2022-12-13 22:16:30,294 INFO L226 Difference]: Without dead ends: 45 [2022-12-13 22:16:30,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-12-13 22:16:30,295 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:16:30,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 58 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:16:30,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-13 22:16:30,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-12-13 22:16:30,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:30,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-12-13 22:16:30,299 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2022-12-13 22:16:30,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:16:30,299 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-12-13 22:16:30,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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) [2022-12-13 22:16:30,299 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-12-13 22:16:30,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-13 22:16:30,300 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:16:30,300 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:30,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 22:16:30,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 22:16:30,501 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:16:30,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:30,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1539792518, now seen corresponding path program 6 times [2022-12-13 22:16:30,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:30,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793809771] [2022-12-13 22:16:30,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:30,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:30,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:30,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793809771] [2022-12-13 22:16:30,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793809771] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:16:30,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619060791] [2022-12-13 22:16:30,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 22:16:30,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:30,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:16:30,906 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:16:30,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 22:16:30,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 22:16:30,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:16:30,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 22:16:30,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:16:31,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 22:16:31,564 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-12-13 22:16:31,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2022-12-13 22:16:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:31,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:16:31,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-13 22:16:31,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-12-13 22:16:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:32,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619060791] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:16:32,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:16:32,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 14] total 37 [2022-12-13 22:16:32,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847615830] [2022-12-13 22:16:32,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:16:32,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 22:16:32,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:16:32,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 22:16:32,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 22:16:32,042 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:35,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:16:35,031 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2022-12-13 22:16:35,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-13 22:16:35,031 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 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 [2022-12-13 22:16:35,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:16:35,032 INFO L225 Difference]: With dead ends: 117 [2022-12-13 22:16:35,032 INFO L226 Difference]: Without dead ends: 54 [2022-12-13 22:16:35,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1309, Invalid=6001, Unknown=0, NotChecked=0, Total=7310 [2022-12-13 22:16:35,037 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 366 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 22:16:35,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 154 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 22:16:35,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-13 22:16:35,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2022-12-13 22:16:35,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:35,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-12-13 22:16:35,043 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 34 [2022-12-13 22:16:35,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:16:35,043 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-12-13 22:16:35,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:35,044 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-12-13 22:16:35,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 22:16:35,044 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:16:35,044 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:35,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 22:16:35,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:35,246 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:16:35,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:35,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1393226030, now seen corresponding path program 1 times [2022-12-13 22:16:35,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:35,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557046196] [2022-12-13 22:16:35,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:35,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-13 22:16:35,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:35,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557046196] [2022-12-13 22:16:35,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557046196] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:16:35,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449571071] [2022-12-13 22:16:35,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:35,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:35,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:16:35,333 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:16:35,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 22:16:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:35,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 22:16:35,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:16:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-13 22:16:35,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:16:35,461 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-13 22:16:35,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449571071] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:16:35,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:16:35,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-12-13 22:16:35,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789515080] [2022-12-13 22:16:35,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:16:35,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 22:16:35,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:16:35,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 22:16:35,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-12-13 22:16:35,463 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:35,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:16:35,564 INFO L93 Difference]: Finished difference Result 145 states and 162 transitions. [2022-12-13 22:16:35,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 22:16:35,565 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 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 44 [2022-12-13 22:16:35,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:16:35,567 INFO L225 Difference]: With dead ends: 145 [2022-12-13 22:16:35,567 INFO L226 Difference]: Without dead ends: 121 [2022-12-13 22:16:35,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-12-13 22:16:35,568 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 115 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:16:35,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 64 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:16:35,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-12-13 22:16:35,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 64. [2022-12-13 22:16:35,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 63 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:35,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-12-13 22:16:35,579 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 44 [2022-12-13 22:16:35,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:16:35,579 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-12-13 22:16:35,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:35,579 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-12-13 22:16:35,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 22:16:35,580 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:16:35,580 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:35,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 22:16:35,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:35,780 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:16:35,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:35,781 INFO L85 PathProgramCache]: Analyzing trace with hash -412212304, now seen corresponding path program 7 times [2022-12-13 22:16:35,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:35,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153049661] [2022-12-13 22:16:35,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:35,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:36,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:36,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153049661] [2022-12-13 22:16:36,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153049661] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:16:36,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060117008] [2022-12-13 22:16:36,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 22:16:36,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:36,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:16:36,100 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:16:36,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 22:16:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:36,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 22:16:36,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:16:36,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 22:16:36,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:16:36,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 22:16:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:36,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:16:36,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-12-13 22:16:36,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-12-13 22:16:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:36,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060117008] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:16:36,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:16:36,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 31 [2022-12-13 22:16:36,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870220397] [2022-12-13 22:16:36,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:16:36,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 22:16:36,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:16:36,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 22:16:36,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2022-12-13 22:16:36,578 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:36,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:16:36,867 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2022-12-13 22:16:36,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 22:16:36,868 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 states have internal predecessors, (90), 0 states have call successors, (0), 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 44 [2022-12-13 22:16:36,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:16:36,868 INFO L225 Difference]: With dead ends: 74 [2022-12-13 22:16:36,869 INFO L226 Difference]: Without dead ends: 72 [2022-12-13 22:16:36,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=223, Invalid=1669, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 22:16:36,870 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 50 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 22:16:36,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 217 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 22:16:36,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-13 22:16:36,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2022-12-13 22:16:36,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:36,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2022-12-13 22:16:36,881 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 44 [2022-12-13 22:16:36,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:16:36,881 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2022-12-13 22:16:36,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:36,881 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2022-12-13 22:16:36,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-13 22:16:36,882 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:16:36,882 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:36,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 22:16:37,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:37,083 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:16:37,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:37,084 INFO L85 PathProgramCache]: Analyzing trace with hash -2143538330, now seen corresponding path program 8 times [2022-12-13 22:16:37,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:37,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526842380] [2022-12-13 22:16:37,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:37,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:37,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:37,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526842380] [2022-12-13 22:16:37,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526842380] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:16:37,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430198439] [2022-12-13 22:16:37,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:16:37,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:37,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:16:37,466 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:16:37,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 22:16:37,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:16:37,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:16:37,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 22:16:37,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:16:37,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 22:16:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:37,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:16:37,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-12-13 22:16:37,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-12-13 22:16:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:37,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430198439] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:16:37,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:16:37,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 33 [2022-12-13 22:16:37,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001953419] [2022-12-13 22:16:37,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:16:37,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 22:16:37,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:16:37,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 22:16:37,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 22:16:37,936 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 33 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) [2022-12-13 22:16:38,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:16:38,518 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2022-12-13 22:16:38,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 22:16:38,519 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 33 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) Word has length 48 [2022-12-13 22:16:38,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:16:38,519 INFO L225 Difference]: With dead ends: 78 [2022-12-13 22:16:38,519 INFO L226 Difference]: Without dead ends: 76 [2022-12-13 22:16:38,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=377, Invalid=3283, Unknown=0, NotChecked=0, Total=3660 [2022-12-13 22:16:38,520 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 100 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 22:16:38,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 247 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 22:16:38,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-12-13 22:16:38,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2022-12-13 22:16:38,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 71 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:38,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2022-12-13 22:16:38,532 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 48 [2022-12-13 22:16:38,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:16:38,532 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2022-12-13 22:16:38,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 33 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) [2022-12-13 22:16:38,533 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2022-12-13 22:16:38,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 22:16:38,533 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:16:38,533 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:38,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 22:16:38,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:38,735 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:16:38,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:38,737 INFO L85 PathProgramCache]: Analyzing trace with hash -546342884, now seen corresponding path program 9 times [2022-12-13 22:16:38,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:38,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840174347] [2022-12-13 22:16:38,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:38,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 51 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:38,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:38,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840174347] [2022-12-13 22:16:38,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840174347] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:16:38,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108160020] [2022-12-13 22:16:38,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:16:38,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:38,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:16:38,902 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:16:38,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 22:16:39,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-13 22:16:39,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:16:39,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 22:16:39,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:16:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:39,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:16:39,279 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:39,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108160020] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:16:39,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:16:39,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-12-13 22:16:39,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46509888] [2022-12-13 22:16:39,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:16:39,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 22:16:39,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:16:39,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 22:16:39,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-12-13 22:16:39,281 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:39,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:16:39,395 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2022-12-13 22:16:39,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 22:16:39,395 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-12-13 22:16:39,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:16:39,396 INFO L225 Difference]: With dead ends: 112 [2022-12-13 22:16:39,396 INFO L226 Difference]: Without dead ends: 80 [2022-12-13 22:16:39,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 81 SyntacticMatches, 14 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 22:16:39,397 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 77 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:16:39,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 140 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:16:39,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-13 22:16:39,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2022-12-13 22:16:39,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 71 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:39,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2022-12-13 22:16:39,408 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 52 [2022-12-13 22:16:39,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:16:39,409 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2022-12-13 22:16:39,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:39,409 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2022-12-13 22:16:39,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 22:16:39,410 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:16:39,410 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:39,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 22:16:39,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 22:16:39,611 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:16:39,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:39,612 INFO L85 PathProgramCache]: Analyzing trace with hash 969527472, now seen corresponding path program 10 times [2022-12-13 22:16:39,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:39,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748440085] [2022-12-13 22:16:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:39,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:40,040 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:40,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:40,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748440085] [2022-12-13 22:16:40,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748440085] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:16:40,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218163705] [2022-12-13 22:16:40,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 22:16:40,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:40,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:16:40,042 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:16:40,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 22:16:40,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 22:16:40,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:16:40,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-13 22:16:40,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:16:40,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 22:16:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:40,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:16:40,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-12-13 22:16:40,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-12-13 22:16:40,432 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:40,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218163705] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:16:40,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:16:40,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 28 [2022-12-13 22:16:40,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810227326] [2022-12-13 22:16:40,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:16:40,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 22:16:40,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:16:40,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 22:16:40,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-12-13 22:16:40,433 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:40,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:16:40,853 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2022-12-13 22:16:40,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 22:16:40,853 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 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 55 [2022-12-13 22:16:40,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:16:40,854 INFO L225 Difference]: With dead ends: 82 [2022-12-13 22:16:40,854 INFO L226 Difference]: Without dead ends: 80 [2022-12-13 22:16:40,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=2033, Unknown=0, NotChecked=0, Total=2256 [2022-12-13 22:16:40,855 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 22:16:40,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 282 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 22:16:40,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-13 22:16:40,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2022-12-13 22:16:40,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 75 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:40,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2022-12-13 22:16:40,869 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 55 [2022-12-13 22:16:40,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:16:40,870 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2022-12-13 22:16:40,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:40,870 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2022-12-13 22:16:40,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 22:16:40,870 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:16:40,871 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:40,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 22:16:41,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 22:16:41,072 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:16:41,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:41,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1292279706, now seen corresponding path program 11 times [2022-12-13 22:16:41,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:41,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738757872] [2022-12-13 22:16:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:41,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 73 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:41,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:41,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738757872] [2022-12-13 22:16:41,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738757872] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:16:41,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195183266] [2022-12-13 22:16:41,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 22:16:41,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:41,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:16:41,274 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:16:41,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 22:16:41,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-12-13 22:16:41,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:16:41,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 22:16:41,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:16:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 98 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:41,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:16:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 98 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:41,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195183266] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:16:41,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:16:41,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-12-13 22:16:41,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989669808] [2022-12-13 22:16:41,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:16:41,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 22:16:41,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:16:41,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 22:16:41,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2022-12-13 22:16:41,683 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:41,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:16:41,853 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2022-12-13 22:16:41,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 22:16:41,854 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 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 59 [2022-12-13 22:16:41,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:16:41,855 INFO L225 Difference]: With dead ends: 120 [2022-12-13 22:16:41,855 INFO L226 Difference]: Without dead ends: 84 [2022-12-13 22:16:41,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 92 SyntacticMatches, 16 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 22:16:41,856 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 71 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:16:41,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 127 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:16:41,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-13 22:16:41,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2022-12-13 22:16:41,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 75 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) [2022-12-13 22:16:41,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2022-12-13 22:16:41,864 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 59 [2022-12-13 22:16:41,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:16:41,865 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2022-12-13 22:16:41,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:41,865 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2022-12-13 22:16:41,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-13 22:16:41,865 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:16:41,865 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:41,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 22:16:42,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 22:16:42,066 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:16:42,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:42,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1425668434, now seen corresponding path program 12 times [2022-12-13 22:16:42,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:42,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935831249] [2022-12-13 22:16:42,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:42,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:42,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:42,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935831249] [2022-12-13 22:16:42,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935831249] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:16:42,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075368023] [2022-12-13 22:16:42,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 22:16:42,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:42,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:16:42,478 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:16:42,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 22:16:42,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-12-13 22:16:42,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:16:42,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 22:16:42,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:16:42,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 22:16:43,306 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-12-13 22:16:43,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2022-12-13 22:16:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 91 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:43,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:16:44,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-13 22:16:44,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-12-13 22:16:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 84 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:16:44,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075368023] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:16:44,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:16:44,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 52 [2022-12-13 22:16:44,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587494709] [2022-12-13 22:16:44,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:16:44,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-13 22:16:44,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:16:44,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-13 22:16:44,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2323, Unknown=0, NotChecked=0, Total=2652 [2022-12-13 22:16:44,210 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:54,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:16:54,597 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2022-12-13 22:16:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-12-13 22:16:54,598 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-12-13 22:16:54,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:16:54,598 INFO L225 Difference]: With dead ends: 165 [2022-12-13 22:16:54,598 INFO L226 Difference]: Without dead ends: 88 [2022-12-13 22:16:54,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 85 SyntacticMatches, 8 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3409 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=1655, Invalid=12143, Unknown=8, NotChecked=0, Total=13806 [2022-12-13 22:16:54,600 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 398 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 117 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-13 22:16:54,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 506 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1131 Invalid, 1 Unknown, 0 Unchecked, 1.4s Time] [2022-12-13 22:16:54,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-13 22:16:54,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2022-12-13 22:16:54,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 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) [2022-12-13 22:16:54,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2022-12-13 22:16:54,608 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 62 [2022-12-13 22:16:54,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:16:54,608 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2022-12-13 22:16:54,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:54,608 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2022-12-13 22:16:54,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-13 22:16:54,609 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:16:54,609 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:54,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 22:16:54,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:54,810 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:16:54,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:54,812 INFO L85 PathProgramCache]: Analyzing trace with hash -336356764, now seen corresponding path program 2 times [2022-12-13 22:16:54,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:54,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628002003] [2022-12-13 22:16:54,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:54,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 25 proven. 222 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-12-13 22:16:54,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:54,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628002003] [2022-12-13 22:16:54,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628002003] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:16:54,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235818859] [2022-12-13 22:16:54,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:16:54,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:54,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:16:54,977 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:16:54,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 22:16:55,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:16:55,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:16:55,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 22:16:55,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:16:55,090 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 25 proven. 222 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-12-13 22:16:55,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:16:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 25 proven. 222 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-12-13 22:16:55,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235818859] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:16:55,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:16:55,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2022-12-13 22:16:55,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135544813] [2022-12-13 22:16:55,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:16:55,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 22:16:55,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:16:55,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 22:16:55,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2022-12-13 22:16:55,285 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:55,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:16:55,481 INFO L93 Difference]: Finished difference Result 274 states and 293 transitions. [2022-12-13 22:16:55,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 22:16:55,482 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-12-13 22:16:55,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:16:55,482 INFO L225 Difference]: With dead ends: 274 [2022-12-13 22:16:55,482 INFO L226 Difference]: Without dead ends: 238 [2022-12-13 22:16:55,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2022-12-13 22:16:55,483 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 391 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:16:55,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 112 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:16:55,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-12-13 22:16:55,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 121. [2022-12-13 22:16:55,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 120 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:55,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2022-12-13 22:16:55,499 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 77 [2022-12-13 22:16:55,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:16:55,499 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2022-12-13 22:16:55,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:16:55,499 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2022-12-13 22:16:55,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-12-13 22:16:55,499 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:16:55,500 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:16:55,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 22:16:55,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 22:16:55,700 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:16:55,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:16:55,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1186343452, now seen corresponding path program 3 times [2022-12-13 22:16:55,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:16:55,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172142443] [2022-12-13 22:16:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:16:55,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:16:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:16:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 53 proven. 1027 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-12-13 22:16:56,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:16:56,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172142443] [2022-12-13 22:16:56,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172142443] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:16:56,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723700315] [2022-12-13 22:16:56,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:16:56,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:16:56,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:16:56,114 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:16:56,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 22:16:59,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-12-13 22:16:59,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:16:59,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 22:16:59,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:16:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 53 proven. 1027 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-12-13 22:16:59,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:17:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 53 proven. 1027 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-12-13 22:17:00,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723700315] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:17:00,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:17:00,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2022-12-13 22:17:00,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219164807] [2022-12-13 22:17:00,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:17:00,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 22:17:00,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:17:00,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 22:17:00,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 22:17:00,556 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand has 57 states, 57 states have (on average 3.1403508771929824) internal successors, (179), 57 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:17:01,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:17:01,067 INFO L93 Difference]: Finished difference Result 526 states and 559 transitions. [2022-12-13 22:17:01,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-13 22:17:01,068 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.1403508771929824) internal successors, (179), 57 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2022-12-13 22:17:01,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:17:01,069 INFO L225 Difference]: With dead ends: 526 [2022-12-13 22:17:01,069 INFO L226 Difference]: Without dead ends: 490 [2022-12-13 22:17:01,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 22:17:01,070 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 880 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 22:17:01,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [880 Valid, 228 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 22:17:01,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-12-13 22:17:01,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 205. [2022-12-13 22:17:01,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0196078431372548) internal successors, (208), 204 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:17:01,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 208 transitions. [2022-12-13 22:17:01,092 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 208 transitions. Word has length 119 [2022-12-13 22:17:01,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:17:01,092 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 208 transitions. [2022-12-13 22:17:01,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.1403508771929824) internal successors, (179), 57 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:17:01,092 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 208 transitions. [2022-12-13 22:17:01,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-12-13 22:17:01,093 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:17:01,093 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 54, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:17:01,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 22:17:01,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 22:17:01,295 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:17:01,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:17:01,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1171837724, now seen corresponding path program 4 times [2022-12-13 22:17:01,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:17:01,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894357592] [2022-12-13 22:17:01,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:17:01,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:17:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:17:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 109 proven. 4401 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-12-13 22:17:02,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:17:02,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894357592] [2022-12-13 22:17:02,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894357592] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:17:02,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117817240] [2022-12-13 22:17:02,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 22:17:02,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:17:02,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:17:02,838 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:17:02,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 22:17:02,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 22:17:02,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:17:02,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-13 22:17:02,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:17:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 109 proven. 4401 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-12-13 22:17:03,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:17:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 109 proven. 4401 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-12-13 22:17:05,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117817240] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:17:05,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:17:05,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 113 [2022-12-13 22:17:05,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005362733] [2022-12-13 22:17:05,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:17:05,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-12-13 22:17:05,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:17:05,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-12-13 22:17:05,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2022-12-13 22:17:05,685 INFO L87 Difference]: Start difference. First operand 205 states and 208 transitions. Second operand has 113 states, 113 states have (on average 3.0707964601769913) internal successors, (347), 113 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:17:08,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:17:08,642 INFO L93 Difference]: Finished difference Result 1030 states and 1091 transitions. [2022-12-13 22:17:08,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-12-13 22:17:08,642 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 3.0707964601769913) internal successors, (347), 113 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2022-12-13 22:17:08,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:17:08,648 INFO L225 Difference]: With dead ends: 1030 [2022-12-13 22:17:08,648 INFO L226 Difference]: Without dead ends: 994 [2022-12-13 22:17:08,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2022-12-13 22:17:08,650 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1970 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1970 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 22:17:08,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1970 Valid, 457 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 22:17:08,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2022-12-13 22:17:08,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 373. [2022-12-13 22:17:08,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 1.010752688172043) internal successors, (376), 372 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:17:08,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 376 transitions. [2022-12-13 22:17:08,693 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 376 transitions. Word has length 203 [2022-12-13 22:17:08,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:17:08,693 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 376 transitions. [2022-12-13 22:17:08,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 3.0707964601769913) internal successors, (347), 113 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:17:08,693 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 376 transitions. [2022-12-13 22:17:08,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-12-13 22:17:08,695 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:17:08,695 INFO L195 NwaCegarLoop]: trace histogram [111, 111, 110, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:17:08,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 22:17:08,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:17:08,896 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:17:08,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:17:08,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1841650404, now seen corresponding path program 5 times [2022-12-13 22:17:08,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:17:08,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449754320] [2022-12-13 22:17:08,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:17:08,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:17:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:17:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18524 backedges. 221 proven. 18205 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-12-13 22:17:15,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:17:15,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449754320] [2022-12-13 22:17:15,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449754320] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:17:15,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761550927] [2022-12-13 22:17:15,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 22:17:15,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:17:15,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:17:15,327 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:17:15,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12592667-4bfd-4d20-959d-83e92acdf686/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process