./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sum40-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/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_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sum40-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/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_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/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 d615723bd3f4193c30af142b587a80ce924c7083a75b532c90d98415d1700958 --- 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 12:58:10,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 12:58:10,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 12:58:10,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 12:58:10,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 12:58:10,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 12:58:10,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 12:58:10,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 12:58:10,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 12:58:10,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 12:58:10,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 12:58:10,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 12:58:10,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 12:58:10,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 12:58:10,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 12:58:10,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 12:58:10,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 12:58:10,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 12:58:10,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 12:58:10,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 12:58:10,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 12:58:10,883 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 12:58:10,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 12:58:10,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 12:58:10,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 12:58:10,887 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 12:58:10,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 12:58:10,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 12:58:10,888 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 12:58:10,889 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 12:58:10,889 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 12:58:10,889 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 12:58:10,890 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 12:58:10,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 12:58:10,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 12:58:10,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 12:58:10,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 12:58:10,892 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 12:58:10,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 12:58:10,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 12:58:10,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 12:58:10,894 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 12:58:10,915 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 12:58:10,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 12:58:10,915 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 12:58:10,916 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 12:58:10,916 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 12:58:10,917 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 12:58:10,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 12:58:10,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 12:58:10,918 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 12:58:10,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 12:58:10,918 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 12:58:10,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 12:58:10,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 12:58:10,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 12:58:10,919 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 12:58:10,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 12:58:10,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 12:58:10,919 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 12:58:10,920 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 12:58:10,920 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 12:58:10,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 12:58:10,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 12:58:10,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 12:58:10,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 12:58:10,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:58:10,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 12:58:10,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 12:58:10,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 12:58:10,922 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 12:58:10,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 12:58:10,922 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 12:58:10,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 12:58:10,922 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 12:58:10,922 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 12:58:10,923 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 12:58:10,923 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_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d615723bd3f4193c30af142b587a80ce924c7083a75b532c90d98415d1700958 [2022-12-13 12:58:11,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 12:58:11,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 12:58:11,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 12:58:11,117 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 12:58:11,118 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 12:58:11,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/reducercommutativity/sum40-2.i [2022-12-13 12:58:13,735 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 12:58:13,873 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 12:58:13,874 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/sv-benchmarks/c/reducercommutativity/sum40-2.i [2022-12-13 12:58:13,880 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/data/5111f86ce/049d8cee9b744114a1b54167332ee2e6/FLAG4feed940e [2022-12-13 12:58:13,895 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/data/5111f86ce/049d8cee9b744114a1b54167332ee2e6 [2022-12-13 12:58:13,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 12:58:13,899 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 12:58:13,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 12:58:13,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 12:58:13,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 12:58:13,905 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:58:13" (1/1) ... [2022-12-13 12:58:13,906 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@381bc57c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:58:13, skipping insertion in model container [2022-12-13 12:58:13,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:58:13" (1/1) ... [2022-12-13 12:58:13,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 12:58:13,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 12:58:14,050 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_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/sv-benchmarks/c/reducercommutativity/sum40-2.i[1277,1290] [2022-12-13 12:58:14,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:58:14,061 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 12:58:14,077 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_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/sv-benchmarks/c/reducercommutativity/sum40-2.i[1277,1290] [2022-12-13 12:58:14,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:58:14,088 INFO L208 MainTranslator]: Completed translation [2022-12-13 12:58:14,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:58:14 WrapperNode [2022-12-13 12:58:14,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 12:58:14,089 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 12:58:14,089 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 12:58:14,089 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 12:58:14,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:58:14" (1/1) ... [2022-12-13 12:58:14,100 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:58:14" (1/1) ... [2022-12-13 12:58:14,113 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-12-13 12:58:14,114 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 12:58:14,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 12:58:14,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 12:58:14,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 12:58:14,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:58:14" (1/1) ... [2022-12-13 12:58:14,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:58:14" (1/1) ... [2022-12-13 12:58:14,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:58:14" (1/1) ... [2022-12-13 12:58:14,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:58:14" (1/1) ... [2022-12-13 12:58:14,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:58:14" (1/1) ... [2022-12-13 12:58:14,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:58:14" (1/1) ... [2022-12-13 12:58:14,133 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:58:14" (1/1) ... [2022-12-13 12:58:14,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:58:14" (1/1) ... [2022-12-13 12:58:14,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 12:58:14,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 12:58:14,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 12:58:14,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 12:58:14,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:58:14" (1/1) ... [2022-12-13 12:58:14,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:58:14,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:58:14,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 12:58:14,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 12:58:14,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 12:58:14,200 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2022-12-13 12:58:14,200 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2022-12-13 12:58:14,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 12:58:14,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 12:58:14,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 12:58:14,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 12:58:14,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 12:58:14,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 12:58:14,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 12:58:14,258 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 12:58:14,260 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 12:58:14,384 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 12:58:14,390 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 12:58:14,391 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 12:58:14,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:58:14 BoogieIcfgContainer [2022-12-13 12:58:14,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 12:58:14,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 12:58:14,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 12:58:14,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 12:58:14,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 12:58:13" (1/3) ... [2022-12-13 12:58:14,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f3e820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:58:14, skipping insertion in model container [2022-12-13 12:58:14,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:58:14" (2/3) ... [2022-12-13 12:58:14,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f3e820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:58:14, skipping insertion in model container [2022-12-13 12:58:14,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:58:14" (3/3) ... [2022-12-13 12:58:14,402 INFO L112 eAbstractionObserver]: Analyzing ICFG sum40-2.i [2022-12-13 12:58:14,420 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 12:58:14,421 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 12:58:14,459 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:58:14,464 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;@d55ddc3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:58:14,465 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 12:58:14,468 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 12:58:14,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 12:58:14,476 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:58:14,477 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:58:14,477 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:58:14,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:58:14,482 INFO L85 PathProgramCache]: Analyzing trace with hash -141219973, now seen corresponding path program 1 times [2022-12-13 12:58:14,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:58:14,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890663077] [2022-12-13 12:58:14,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:58:14,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:58:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:14,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 12:58:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:14,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 12:58:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:14,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 12:58:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:14,761 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 12:58:14,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:58:14,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890663077] [2022-12-13 12:58:14,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890663077] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:58:14,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175303975] [2022-12-13 12:58:14,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:58:14,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:14,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:58:14,764 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:58:14,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 12:58:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:14,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 12:58:14,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:58:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 12:58:14,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:58:14,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175303975] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:58:14,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:58:14,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-13 12:58:14,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136685569] [2022-12-13 12:58:14,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:58:14,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:58:14,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:58:14,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:58:14,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:58:14,909 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 12:58:14,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:58:14,935 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-12-13 12:58:14,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:58:14,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-12-13 12:58:14,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:58:14,943 INFO L225 Difference]: With dead ends: 50 [2022-12-13 12:58:14,944 INFO L226 Difference]: Without dead ends: 24 [2022-12-13 12:58:14,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:58:14,949 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:58:14,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:58:14,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-13 12:58:14,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-12-13 12:58:14,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 12:58:14,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-12-13 12:58:14,978 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-12-13 12:58:14,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:58:14,978 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-12-13 12:58:14,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 12:58:14,979 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-12-13 12:58:14,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 12:58:14,980 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:58:14,980 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:58:14,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 12:58:15,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-13 12:58:15,183 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:58:15,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:58:15,185 INFO L85 PathProgramCache]: Analyzing trace with hash -618478211, now seen corresponding path program 1 times [2022-12-13 12:58:15,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:58:15,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388097075] [2022-12-13 12:58:15,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:58:15,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:58:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:15,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 12:58:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:15,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 12:58:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:15,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-12-13 12:58:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 12:58:15,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:58:15,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388097075] [2022-12-13 12:58:15,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388097075] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:58:15,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727270008] [2022-12-13 12:58:15,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:58:15,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:15,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:58:15,404 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:58:15,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 12:58:15,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:15,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 12:58:15,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:58:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 12:58:15,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:58:15,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727270008] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:58:15,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:58:15,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-13 12:58:15,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858663116] [2022-12-13 12:58:15,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:58:15,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:58:15,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:58:15,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:58:15,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:58:15,477 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 12:58:15,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:58:15,487 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-12-13 12:58:15,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:58:15,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-12-13 12:58:15,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:58:15,489 INFO L225 Difference]: With dead ends: 42 [2022-12-13 12:58:15,489 INFO L226 Difference]: Without dead ends: 25 [2022-12-13 12:58:15,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:58:15,491 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:58:15,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:58:15,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-13 12:58:15,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-12-13 12:58:15,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 12:58:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-12-13 12:58:15,496 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2022-12-13 12:58:15,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:58:15,496 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-12-13 12:58:15,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 12:58:15,497 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-12-13 12:58:15,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 12:58:15,498 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:58:15,498 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:58:15,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 12:58:15,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:15,700 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:58:15,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:58:15,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1511029509, now seen corresponding path program 1 times [2022-12-13 12:58:15,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:58:15,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346466937] [2022-12-13 12:58:15,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:58:15,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:58:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:15,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 12:58:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:15,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 12:58:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:15,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-12-13 12:58:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 12:58:15,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:58:15,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346466937] [2022-12-13 12:58:15,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346466937] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:58:15,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889544677] [2022-12-13 12:58:15,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:58:15,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:15,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:58:15,927 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:58:15,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 12:58:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:15,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 12:58:15,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:58:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 12:58:16,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:58:16,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889544677] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:58:16,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:58:16,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-13 12:58:16,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591029431] [2022-12-13 12:58:16,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:58:16,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:58:16,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:58:16,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:58:16,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:58:16,003 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 12:58:16,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:58:16,015 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-12-13 12:58:16,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:58:16,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-12-13 12:58:16,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:58:16,016 INFO L225 Difference]: With dead ends: 39 [2022-12-13 12:58:16,016 INFO L226 Difference]: Without dead ends: 26 [2022-12-13 12:58:16,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:58:16,018 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:58:16,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:58:16,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-13 12:58:16,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-12-13 12:58:16,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 12:58:16,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-12-13 12:58:16,023 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2022-12-13 12:58:16,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:58:16,025 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-12-13 12:58:16,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 12:58:16,025 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-12-13 12:58:16,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-13 12:58:16,026 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:58:16,026 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:58:16,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 12:58:16,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:16,228 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:58:16,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:58:16,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1553738215, now seen corresponding path program 1 times [2022-12-13 12:58:16,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:58:16,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393627320] [2022-12-13 12:58:16,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:58:16,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:58:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:16,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 12:58:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:16,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 12:58:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:16,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-12-13 12:58:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 12:58:16,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:58:16,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393627320] [2022-12-13 12:58:16,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393627320] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:58:16,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040531675] [2022-12-13 12:58:16,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:58:16,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:16,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:58:16,415 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:58:16,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 12:58:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:16,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 12:58:16,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:58:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 12:58:16,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:58:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 12:58:16,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040531675] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:58:16,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:58:16,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-12-13 12:58:16,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516806583] [2022-12-13 12:58:16,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:58:16,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 12:58:16,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:58:16,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 12:58:16,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 12:58:16,522 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 12:58:16,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:58:16,550 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-12-13 12:58:16,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:58:16,551 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2022-12-13 12:58:16,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:58:16,552 INFO L225 Difference]: With dead ends: 54 [2022-12-13 12:58:16,552 INFO L226 Difference]: Without dead ends: 34 [2022-12-13 12:58:16,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 12:58:16,554 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:58:16,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 102 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:58:16,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-13 12:58:16,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-12-13 12:58:16,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 12:58:16,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-12-13 12:58:16,560 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2022-12-13 12:58:16,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:58:16,560 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-12-13 12:58:16,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 12:58:16,560 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-12-13 12:58:16,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 12:58:16,561 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:58:16,561 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:58:16,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 12:58:16,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:16,764 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:58:16,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:58:16,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1124150243, now seen corresponding path program 2 times [2022-12-13 12:58:16,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:58:16,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677137080] [2022-12-13 12:58:16,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:58:16,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:58:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:16,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 12:58:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:16,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 12:58:16,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:16,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-12-13 12:58:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-13 12:58:16,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:58:16,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677137080] [2022-12-13 12:58:16,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677137080] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:58:16,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092241666] [2022-12-13 12:58:16,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:58:16,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:16,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:58:16,951 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:58:16,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 12:58:17,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:58:17,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:58:17,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 12:58:17,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:58:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-13 12:58:17,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:58:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-13 12:58:17,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092241666] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:58:17,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:58:17,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-12-13 12:58:17,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740921324] [2022-12-13 12:58:17,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:58:17,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 12:58:17,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:58:17,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 12:58:17,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-12-13 12:58:17,131 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-13 12:58:17,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:58:17,175 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-12-13 12:58:17,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 12:58:17,176 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-12-13 12:58:17,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:58:17,177 INFO L225 Difference]: With dead ends: 70 [2022-12-13 12:58:17,177 INFO L226 Difference]: Without dead ends: 48 [2022-12-13 12:58:17,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-12-13 12:58:17,178 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:58:17,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 80 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:58:17,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-13 12:58:17,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-12-13 12:58:17,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 12:58:17,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-12-13 12:58:17,183 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2022-12-13 12:58:17,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:58:17,183 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-12-13 12:58:17,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-13 12:58:17,183 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-12-13 12:58:17,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-13 12:58:17,186 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:58:17,186 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:58:17,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 12:58:17,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:17,386 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:58:17,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:58:17,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1238744391, now seen corresponding path program 3 times [2022-12-13 12:58:17,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:58:17,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067552475] [2022-12-13 12:58:17,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:58:17,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:58:17,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:17,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 12:58:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:17,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-12-13 12:58:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:17,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-12-13 12:58:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-12-13 12:58:17,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:58:17,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067552475] [2022-12-13 12:58:17,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067552475] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:58:17,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722875961] [2022-12-13 12:58:17,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:58:17,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:17,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:58:17,582 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:58:17,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 12:58:17,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 12:58:17,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:58:17,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 12:58:17,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:58:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-12-13 12:58:17,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:58:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-12-13 12:58:17,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722875961] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:58:17,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:58:17,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-12-13 12:58:17,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692714745] [2022-12-13 12:58:17,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:58:17,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 12:58:17,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:58:17,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 12:58:17,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-12-13 12:58:17,726 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 12:58:17,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:58:17,779 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2022-12-13 12:58:17,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 12:58:17,780 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2022-12-13 12:58:17,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:58:17,780 INFO L225 Difference]: With dead ends: 82 [2022-12-13 12:58:17,780 INFO L226 Difference]: Without dead ends: 58 [2022-12-13 12:58:17,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-12-13 12:58:17,781 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:58:17,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 102 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:58:17,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-13 12:58:17,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-12-13 12:58:17,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 12:58:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-12-13 12:58:17,786 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 64 [2022-12-13 12:58:17,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:58:17,786 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-12-13 12:58:17,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 12:58:17,787 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-12-13 12:58:17,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-12-13 12:58:17,787 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:58:17,787 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:58:17,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 12:58:17,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 12:58:17,989 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:58:17,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:58:17,990 INFO L85 PathProgramCache]: Analyzing trace with hash 85970241, now seen corresponding path program 4 times [2022-12-13 12:58:17,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:58:17,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065765559] [2022-12-13 12:58:17,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:58:17,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:58:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:18,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-12-13 12:58:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:18,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 12:58:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:18,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-12-13 12:58:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:18,308 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-12-13 12:58:18,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:58:18,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065765559] [2022-12-13 12:58:18,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065765559] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:58:18,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217868773] [2022-12-13 12:58:18,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:58:18,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:18,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:58:18,310 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:58:18,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 12:58:18,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:58:18,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:58:18,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 12:58:18,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:58:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 178 proven. 4 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-12-13 12:58:18,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:58:18,482 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-12-13 12:58:18,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217868773] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:58:18,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:58:18,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-12-13 12:58:18,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721302708] [2022-12-13 12:58:18,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:58:18,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 12:58:18,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:58:18,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 12:58:18,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-12-13 12:58:18,485 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 12:58:18,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:58:18,538 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-12-13 12:58:18,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 12:58:18,539 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2022-12-13 12:58:18,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:58:18,540 INFO L225 Difference]: With dead ends: 100 [2022-12-13 12:58:18,540 INFO L226 Difference]: Without dead ends: 68 [2022-12-13 12:58:18,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-12-13 12:58:18,541 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:58:18,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 81 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:58:18,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-13 12:58:18,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-12-13 12:58:18,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 12:58:18,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-12-13 12:58:18,549 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 90 [2022-12-13 12:58:18,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:58:18,549 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-12-13 12:58:18,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 12:58:18,550 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-12-13 12:58:18,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-13 12:58:18,551 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:58:18,551 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 12, 12, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:58:18,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 12:58:18,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:18,752 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:58:18,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:58:18,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2002416443, now seen corresponding path program 5 times [2022-12-13 12:58:18,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:58:18,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530676836] [2022-12-13 12:58:18,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:58:18,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:58:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:19,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-12-13 12:58:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:19,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 12:58:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:19,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-12-13 12:58:19,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2022-12-13 12:58:19,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:58:19,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530676836] [2022-12-13 12:58:19,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530676836] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:58:19,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138462941] [2022-12-13 12:58:19,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:58:19,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:19,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:58:19,058 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:58:19,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 12:58:19,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-12-13 12:58:19,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:58:19,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 12:58:19,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:58:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2022-12-13 12:58:19,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:58:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-12-13 12:58:19,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138462941] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:58:19,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:58:19,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2022-12-13 12:58:19,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293056641] [2022-12-13 12:58:19,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:58:19,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 12:58:19,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:58:19,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 12:58:19,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-12-13 12:58:19,798 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 12:58:19,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:58:19,867 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2022-12-13 12:58:19,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 12:58:19,868 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 100 [2022-12-13 12:58:19,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:58:19,868 INFO L225 Difference]: With dead ends: 126 [2022-12-13 12:58:19,869 INFO L226 Difference]: Without dead ends: 86 [2022-12-13 12:58:19,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-12-13 12:58:19,870 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:58:19,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 142 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:58:19,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-12-13 12:58:19,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-12-13 12:58:19,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 12:58:19,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-12-13 12:58:19,879 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 100 [2022-12-13 12:58:19,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:58:19,879 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-12-13 12:58:19,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 12:58:19,880 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-12-13 12:58:19,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-13 12:58:19,881 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:58:19,882 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 13, 13, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:58:19,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 12:58:20,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:20,083 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:58:20,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:58:20,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1921824045, now seen corresponding path program 6 times [2022-12-13 12:58:20,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:58:20,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454286840] [2022-12-13 12:58:20,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:58:20,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:58:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:20,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-12-13 12:58:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:20,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-12-13 12:58:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:20,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-12-13 12:58:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-12-13 12:58:20,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:58:20,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454286840] [2022-12-13 12:58:20,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454286840] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:58:20,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5208289] [2022-12-13 12:58:20,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:58:20,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:20,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:58:20,420 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:58:20,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 12:58:20,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-12-13 12:58:20,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:58:20,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 12:58:20,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:58:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 1182 trivial. 0 not checked. [2022-12-13 12:58:20,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:58:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2022-12-13 12:58:20,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5208289] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:58:20,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:58:20,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2022-12-13 12:58:20,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672315953] [2022-12-13 12:58:20,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:58:20,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 12:58:20,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:58:20,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 12:58:20,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-12-13 12:58:20,946 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 12:58:21,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:58:21,021 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2022-12-13 12:58:21,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 12:58:21,022 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2022-12-13 12:58:21,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:58:21,023 INFO L225 Difference]: With dead ends: 160 [2022-12-13 12:58:21,023 INFO L226 Difference]: Without dead ends: 104 [2022-12-13 12:58:21,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-12-13 12:58:21,024 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:58:21,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 120 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:58:21,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-13 12:58:21,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-12-13 12:58:21,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 12:58:21,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2022-12-13 12:58:21,033 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 150 [2022-12-13 12:58:21,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:58:21,033 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2022-12-13 12:58:21,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 12:58:21,034 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2022-12-13 12:58:21,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-13 12:58:21,036 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:58:21,036 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 14, 14, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:58:21,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 12:58:21,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:21,238 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:58:21,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:58:21,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1322781599, now seen corresponding path program 7 times [2022-12-13 12:58:21,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:58:21,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885095290] [2022-12-13 12:58:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:58:21,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:58:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:21,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-12-13 12:58:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:21,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-12-13 12:58:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:21,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-12-13 12:58:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:21,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-12-13 12:58:21,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:58:21,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885095290] [2022-12-13 12:58:21,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885095290] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:58:21,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837632435] [2022-12-13 12:58:21,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:58:21,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:21,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:58:21,631 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:58:21,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 12:58:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:21,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 12:58:21,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:58:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-12-13 12:58:21,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:58:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-12-13 12:58:22,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837632435] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:58:22,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:58:22,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-12-13 12:58:22,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841503835] [2022-12-13 12:58:22,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:58:22,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 12:58:22,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:58:22,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 12:58:22,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 12:58:22,057 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 12:58:22,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:58:22,124 INFO L93 Difference]: Finished difference Result 207 states and 230 transitions. [2022-12-13 12:58:22,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 12:58:22,124 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 168 [2022-12-13 12:58:22,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:58:22,126 INFO L225 Difference]: With dead ends: 207 [2022-12-13 12:58:22,126 INFO L226 Difference]: Without dead ends: 135 [2022-12-13 12:58:22,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 12:58:22,127 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:58:22,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 112 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:58:22,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-12-13 12:58:22,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-12-13 12:58:22,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 12:58:22,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2022-12-13 12:58:22,134 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 168 [2022-12-13 12:58:22,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:58:22,134 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2022-12-13 12:58:22,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 12:58:22,134 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2022-12-13 12:58:22,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-12-13 12:58:22,136 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:58:22,136 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 30, 30, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:58:22,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 12:58:22,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:22,337 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:58:22,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:58:22,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1725939777, now seen corresponding path program 8 times [2022-12-13 12:58:22,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:58:22,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767827410] [2022-12-13 12:58:22,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:58:22,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:58:22,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:23,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-12-13 12:58:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:23,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-12-13 12:58:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:23,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-12-13 12:58:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:23,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-12-13 12:58:23,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:58:23,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767827410] [2022-12-13 12:58:23,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767827410] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:58:23,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401435642] [2022-12-13 12:58:23,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:58:23,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:23,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:58:23,100 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:58:23,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 12:58:23,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:58:23,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:58:23,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 12:58:23,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:58:23,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-12-13 12:58:23,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:58:23,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-12-13 12:58:23,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401435642] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:58:23,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:58:23,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 43 [2022-12-13 12:58:23,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979695612] [2022-12-13 12:58:23,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:58:23,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 12:58:23,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:58:23,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 12:58:23,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 12:58:23,803 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 43 states have internal predecessors, (107), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 12:58:23,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:58:23,891 INFO L93 Difference]: Finished difference Result 227 states and 244 transitions. [2022-12-13 12:58:23,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 12:58:23,892 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 43 states have internal predecessors, (107), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 200 [2022-12-13 12:58:23,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:58:23,893 INFO L225 Difference]: With dead ends: 227 [2022-12-13 12:58:23,893 INFO L226 Difference]: Without dead ends: 155 [2022-12-13 12:58:23,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 374 SyntacticMatches, 22 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 12:58:23,894 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:58:23,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 156 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:58:23,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-12-13 12:58:23,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-12-13 12:58:23,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.02) internal successors, (153), 150 states have internal predecessors, (153), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 12:58:23,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 159 transitions. [2022-12-13 12:58:23,900 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 159 transitions. Word has length 200 [2022-12-13 12:58:23,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:58:23,900 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 159 transitions. [2022-12-13 12:58:23,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 43 states have internal predecessors, (107), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 12:58:23,900 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 159 transitions. [2022-12-13 12:58:23,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-12-13 12:58:23,902 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:58:23,902 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 40, 40, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:58:23,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 12:58:24,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 12:58:24,104 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:58:24,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:58:24,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1781862573, now seen corresponding path program 9 times [2022-12-13 12:58:24,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:58:24,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582920348] [2022-12-13 12:58:24,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:58:24,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:58:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:24,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-12-13 12:58:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:24,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-12-13 12:58:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:24,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-12-13 12:58:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3659 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 2615 trivial. 0 not checked. [2022-12-13 12:58:24,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:58:24,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582920348] [2022-12-13 12:58:24,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582920348] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:58:24,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552359644] [2022-12-13 12:58:24,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:58:24,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:24,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:58:24,487 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:58:24,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 12:58:26,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-12-13 12:58:26,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:58:26,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 12:58:26,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:58:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3659 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 2615 trivial. 0 not checked. [2022-12-13 12:58:26,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:58:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3659 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 2615 trivial. 0 not checked. [2022-12-13 12:58:26,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552359644] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:58:26,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:58:26,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2022-12-13 12:58:26,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557603543] [2022-12-13 12:58:26,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:58:26,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 12:58:26,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:58:26,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 12:58:26,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2022-12-13 12:58:26,703 INFO L87 Difference]: Start difference. First operand 155 states and 159 transitions. Second operand has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 12:58:26,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:58:26,752 INFO L93 Difference]: Finished difference Result 258 states and 283 transitions. [2022-12-13 12:58:26,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 12:58:26,753 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 220 [2022-12-13 12:58:26,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:58:26,754 INFO L225 Difference]: With dead ends: 258 [2022-12-13 12:58:26,754 INFO L226 Difference]: Without dead ends: 187 [2022-12-13 12:58:26,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2022-12-13 12:58:26,755 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:58:26,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 90 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:58:26,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-12-13 12:58:26,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-12-13 12:58:26,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.0164835164835164) internal successors, (185), 182 states have internal predecessors, (185), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 12:58:26,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 191 transitions. [2022-12-13 12:58:26,763 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 191 transitions. Word has length 220 [2022-12-13 12:58:26,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:58:26,763 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 191 transitions. [2022-12-13 12:58:26,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 12:58:26,764 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 191 transitions. [2022-12-13 12:58:26,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-12-13 12:58:26,767 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:58:26,767 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 40, 40, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:58:26,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 12:58:26,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:26,969 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:58:26,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:58:26,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1749087027, now seen corresponding path program 10 times [2022-12-13 12:58:26,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:58:26,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692397893] [2022-12-13 12:58:26,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:58:26,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:58:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:27,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-12-13 12:58:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:27,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-12-13 12:58:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:27,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2022-12-13 12:58:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10091 backedges. 0 proven. 4628 refuted. 0 times theorem prover too weak. 5463 trivial. 0 not checked. [2022-12-13 12:58:27,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:58:27,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692397893] [2022-12-13 12:58:27,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692397893] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:58:27,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467217281] [2022-12-13 12:58:27,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:58:27,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:27,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:58:27,940 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:58:27,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 12:58:28,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:58:28,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:58:28,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 12:58:28,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:58:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10091 backedges. 3728 proven. 900 refuted. 0 times theorem prover too weak. 5463 trivial. 0 not checked. [2022-12-13 12:58:28,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:58:28,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10091 backedges. 3728 proven. 900 refuted. 0 times theorem prover too weak. 5463 trivial. 0 not checked. [2022-12-13 12:58:28,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467217281] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:58:28,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:58:28,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 42 [2022-12-13 12:58:28,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988033334] [2022-12-13 12:58:28,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:58:28,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 12:58:28,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:58:28,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 12:58:28,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 12:58:28,717 INFO L87 Difference]: Start difference. First operand 187 states and 191 transitions. Second operand has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 42 states have internal predecessors, (110), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 12:58:28,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:58:28,792 INFO L93 Difference]: Finished difference Result 310 states and 329 transitions. [2022-12-13 12:58:28,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 12:58:28,793 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 42 states have internal predecessors, (110), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 316 [2022-12-13 12:58:28,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:58:28,795 INFO L225 Difference]: With dead ends: 310 [2022-12-13 12:58:28,795 INFO L226 Difference]: Without dead ends: 207 [2022-12-13 12:58:28,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 607 SyntacticMatches, 22 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 12:58:28,796 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:58:28,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 134 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:58:28,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-12-13 12:58:28,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-12-13 12:58:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.0148514851485149) internal successors, (205), 202 states have internal predecessors, (205), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 12:58:28,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 211 transitions. [2022-12-13 12:58:28,802 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 211 transitions. Word has length 316 [2022-12-13 12:58:28,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:58:28,802 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 211 transitions. [2022-12-13 12:58:28,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 42 states have internal predecessors, (110), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 12:58:28,803 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 211 transitions. [2022-12-13 12:58:28,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2022-12-13 12:58:28,804 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:58:28,804 INFO L195 NwaCegarLoop]: trace histogram [120, 120, 40, 40, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:58:28,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 12:58:29,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 12:58:29,005 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:58:29,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:58:29,007 INFO L85 PathProgramCache]: Analyzing trace with hash 176244895, now seen corresponding path program 11 times [2022-12-13 12:58:29,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:58:29,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690295621] [2022-12-13 12:58:29,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:58:29,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:58:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:29,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-12-13 12:58:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:29,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-12-13 12:58:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:29,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 287 [2022-12-13 12:58:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:58:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16451 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 16255 trivial. 0 not checked. [2022-12-13 12:58:29,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:58:29,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690295621] [2022-12-13 12:58:29,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690295621] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:58:29,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847450597] [2022-12-13 12:58:29,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:58:29,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:58:29,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:58:29,464 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:58:29,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 13:00:29,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 82 check-sat command(s) [2022-12-13 13:00:29,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:00:29,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 13:00:29,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:00:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16451 backedges. 6570 proven. 196 refuted. 0 times theorem prover too weak. 9685 trivial. 0 not checked. [2022-12-13 13:00:29,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:00:29,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16451 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 16255 trivial. 0 not checked. [2022-12-13 13:00:29,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847450597] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:00:29,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:00:29,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-12-13 13:00:29,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817910708] [2022-12-13 13:00:29,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:00:29,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 13:00:29,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:00:29,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 13:00:29,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 13:00:29,627 INFO L87 Difference]: Start difference. First operand 207 states and 211 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 13:00:29,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:00:29,696 INFO L93 Difference]: Finished difference Result 330 states and 350 transitions. [2022-12-13 13:00:29,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 13:00:29,696 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 376 [2022-12-13 13:00:29,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:00:29,697 INFO L225 Difference]: With dead ends: 330 [2022-12-13 13:00:29,697 INFO L226 Difference]: Without dead ends: 239 [2022-12-13 13:00:29,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 773 GetRequests, 742 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 13:00:29,698 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:00:29,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 192 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:00:29,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-12-13 13:00:29,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2022-12-13 13:00:29,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.0128205128205128) internal successors, (237), 234 states have internal predecessors, (237), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 13:00:29,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 243 transitions. [2022-12-13 13:00:29,711 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 243 transitions. Word has length 376 [2022-12-13 13:00:29,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:00:29,711 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 243 transitions. [2022-12-13 13:00:29,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 13:00:29,712 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 243 transitions. [2022-12-13 13:00:29,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2022-12-13 13:00:29,714 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:00:29,714 INFO L195 NwaCegarLoop]: trace histogram [120, 120, 40, 40, 30, 30, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:00:29,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 13:00:29,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 13:00:29,915 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:00:29,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:00:29,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1634862719, now seen corresponding path program 12 times [2022-12-13 13:00:29,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:00:29,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059190996] [2022-12-13 13:00:29,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:00:29,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:00:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:00:30,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-12-13 13:00:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:00:30,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-12-13 13:00:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:00:30,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 319 [2022-12-13 13:00:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:00:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 17155 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 16255 trivial. 0 not checked. [2022-12-13 13:00:30,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:00:30,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059190996] [2022-12-13 13:00:30,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059190996] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:00:30,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653951485] [2022-12-13 13:00:30,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 13:00:30,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:00:30,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:00:30,763 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:00:30,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 13:01:32,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2022-12-13 13:01:32,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:01:32,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-13 13:01:32,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:01:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17155 backedges. 6809 proven. 900 refuted. 0 times theorem prover too weak. 9446 trivial. 0 not checked. [2022-12-13 13:01:32,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:01:33,324 INFO L134 CoverageAnalysis]: Checked inductivity of 17155 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 16255 trivial. 0 not checked. [2022-12-13 13:01:33,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653951485] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:01:33,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:01:33,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 37, 33] total 46 [2022-12-13 13:01:33,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730672114] [2022-12-13 13:01:33,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:01:33,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-13 13:01:33,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:01:33,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-13 13:01:33,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=871, Invalid=1199, Unknown=0, NotChecked=0, Total=2070 [2022-12-13 13:01:33,328 INFO L87 Difference]: Start difference. First operand 239 states and 243 transitions. Second operand has 46 states, 46 states have (on average 2.4130434782608696) internal successors, (111), 46 states have internal predecessors, (111), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 13:01:33,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:01:33,958 INFO L93 Difference]: Finished difference Result 348 states and 361 transitions. [2022-12-13 13:01:33,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-13 13:01:33,959 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.4130434782608696) internal successors, (111), 46 states have internal predecessors, (111), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 408 [2022-12-13 13:01:33,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:01:33,961 INFO L225 Difference]: With dead ends: 348 [2022-12-13 13:01:33,961 INFO L226 Difference]: Without dead ends: 257 [2022-12-13 13:01:33,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 892 GetRequests, 786 SyntacticMatches, 23 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2510, Invalid=4630, Unknown=0, NotChecked=0, Total=7140 [2022-12-13 13:01:33,965 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 91 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:01:33,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 109 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:01:33,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-12-13 13:01:33,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2022-12-13 13:01:33,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.0119047619047619) internal successors, (255), 252 states have internal predecessors, (255), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 13:01:33,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 261 transitions. [2022-12-13 13:01:33,978 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 261 transitions. Word has length 408 [2022-12-13 13:01:33,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:01:33,978 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 261 transitions. [2022-12-13 13:01:33,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.4130434782608696) internal successors, (111), 46 states have internal predecessors, (111), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 13:01:33,979 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 261 transitions. [2022-12-13 13:01:33,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2022-12-13 13:01:33,981 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:01:33,982 INFO L195 NwaCegarLoop]: trace histogram [120, 120, 40, 40, 39, 39, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:01:33,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 13:01:34,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dc1bd1e-7cb3-49ee-a5e8-012ffe4ac113/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 13:01:34,183 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:01:34,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:01:34,184 INFO L85 PathProgramCache]: Analyzing trace with hash -670252659, now seen corresponding path program 13 times [2022-12-13 13:01:34,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:01:34,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209584283] [2022-12-13 13:01:34,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:01:34,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:01:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat