./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/sina2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/sina2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a --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 1ea1eb4a8af9eb0da04a9f2b25d1b98ecd98ff3b6d87ba0d8e53000f12b8adcc --- 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-b5237d8 [2022-11-21 17:15:51,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 17:15:51,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 17:15:52,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 17:15:52,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 17:15:52,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 17:15:52,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 17:15:52,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 17:15:52,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 17:15:52,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 17:15:52,018 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 17:15:52,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 17:15:52,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 17:15:52,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 17:15:52,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 17:15:52,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 17:15:52,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 17:15:52,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 17:15:52,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 17:15:52,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 17:15:52,048 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 17:15:52,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 17:15:52,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 17:15:52,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 17:15:52,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 17:15:52,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 17:15:52,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 17:15:52,066 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 17:15:52,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 17:15:52,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 17:15:52,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 17:15:52,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 17:15:52,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 17:15:52,071 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 17:15:52,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 17:15:52,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 17:15:52,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 17:15:52,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 17:15:52,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 17:15:52,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 17:15:52,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 17:15:52,076 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 17:15:52,116 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 17:15:52,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 17:15:52,117 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 17:15:52,118 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 17:15:52,118 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 17:15:52,119 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 17:15:52,119 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 17:15:52,120 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 17:15:52,120 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 17:15:52,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 17:15:52,121 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 17:15:52,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 17:15:52,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 17:15:52,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 17:15:52,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 17:15:52,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 17:15:52,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 17:15:52,123 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 17:15:52,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 17:15:52,124 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 17:15:52,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 17:15:52,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 17:15:52,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 17:15:52,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 17:15:52,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:15:52,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 17:15:52,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 17:15:52,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 17:15:52,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 17:15:52,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 17:15:52,127 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 17:15:52,128 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 17:15:52,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 17:15:52,128 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ea1eb4a8af9eb0da04a9f2b25d1b98ecd98ff3b6d87ba0d8e53000f12b8adcc [2022-11-21 17:15:52,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 17:15:52,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 17:15:52,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 17:15:52,501 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 17:15:52,501 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 17:15:52,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/array-fpi/sina2.c [2022-11-21 17:15:55,603 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 17:15:55,810 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 17:15:55,811 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/sv-benchmarks/c/array-fpi/sina2.c [2022-11-21 17:15:55,818 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/data/925655823/5994017f5a5c449b86dc5a55981175b6/FLAG5916c50ce [2022-11-21 17:15:55,839 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/data/925655823/5994017f5a5c449b86dc5a55981175b6 [2022-11-21 17:15:55,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 17:15:55,844 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 17:15:55,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 17:15:55,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 17:15:55,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 17:15:55,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:15:55" (1/1) ... [2022-11-21 17:15:55,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52c174f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:15:55, skipping insertion in model container [2022-11-21 17:15:55,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:15:55" (1/1) ... [2022-11-21 17:15:55,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 17:15:55,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 17:15:56,029 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_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/sv-benchmarks/c/array-fpi/sina2.c[588,601] [2022-11-21 17:15:56,066 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:15:56,082 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 17:15:56,093 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_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/sv-benchmarks/c/array-fpi/sina2.c[588,601] [2022-11-21 17:15:56,100 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:15:56,115 INFO L208 MainTranslator]: Completed translation [2022-11-21 17:15:56,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:15:56 WrapperNode [2022-11-21 17:15:56,116 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 17:15:56,117 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 17:15:56,117 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 17:15:56,117 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 17:15:56,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:15:56" (1/1) ... [2022-11-21 17:15:56,142 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:15:56" (1/1) ... [2022-11-21 17:15:56,162 INFO L138 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2022-11-21 17:15:56,163 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 17:15:56,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 17:15:56,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 17:15:56,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 17:15:56,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:15:56" (1/1) ... [2022-11-21 17:15:56,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:15:56" (1/1) ... [2022-11-21 17:15:56,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:15:56" (1/1) ... [2022-11-21 17:15:56,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:15:56" (1/1) ... [2022-11-21 17:15:56,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:15:56" (1/1) ... [2022-11-21 17:15:56,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:15:56" (1/1) ... [2022-11-21 17:15:56,193 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:15:56" (1/1) ... [2022-11-21 17:15:56,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:15:56" (1/1) ... [2022-11-21 17:15:56,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 17:15:56,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 17:15:56,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 17:15:56,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 17:15:56,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:15:56" (1/1) ... [2022-11-21 17:15:56,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:15:56,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:15:56,268 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 17:15:56,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 17:15:56,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 17:15:56,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 17:15:56,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 17:15:56,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 17:15:56,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 17:15:56,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 17:15:56,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 17:15:56,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 17:15:56,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 17:15:56,402 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 17:15:56,404 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 17:15:56,643 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 17:15:56,649 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 17:15:56,663 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-21 17:15:56,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:15:56 BoogieIcfgContainer [2022-11-21 17:15:56,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 17:15:56,667 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 17:15:56,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 17:15:56,671 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 17:15:56,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 05:15:55" (1/3) ... [2022-11-21 17:15:56,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427a9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:15:56, skipping insertion in model container [2022-11-21 17:15:56,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:15:56" (2/3) ... [2022-11-21 17:15:56,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427a9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:15:56, skipping insertion in model container [2022-11-21 17:15:56,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:15:56" (3/3) ... [2022-11-21 17:15:56,683 INFO L112 eAbstractionObserver]: Analyzing ICFG sina2.c [2022-11-21 17:15:56,717 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 17:15:56,730 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 17:15:56,819 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:15:56,842 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;@145c9be, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:15:56,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 17:15:56,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:15:56,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 17:15:56,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:15:56,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:15:56,858 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:15:56,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:15:56,864 INFO L85 PathProgramCache]: Analyzing trace with hash -592971038, now seen corresponding path program 1 times [2022-11-21 17:15:56,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:15:56,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235222064] [2022-11-21 17:15:56,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:15:56,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:15:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:15:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:15:57,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:15:57,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235222064] [2022-11-21 17:15:57,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235222064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:15:57,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:15:57,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 17:15:57,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220691862] [2022-11-21 17:15:57,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:15:57,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 17:15:57,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:15:57,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 17:15:57,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 17:15:57,121 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:15:57,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:15:57,147 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2022-11-21 17:15:57,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 17:15:57,153 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-21 17:15:57,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:15:57,162 INFO L225 Difference]: With dead ends: 44 [2022-11-21 17:15:57,163 INFO L226 Difference]: Without dead ends: 20 [2022-11-21 17:15:57,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 17:15:57,175 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:15:57,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:15:57,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-21 17:15:57,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-21 17:15:57,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:15:57,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-21 17:15:57,212 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-11-21 17:15:57,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:15:57,212 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-21 17:15:57,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:15:57,213 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-21 17:15:57,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 17:15:57,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:15:57,214 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:15:57,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 17:15:57,214 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:15:57,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:15:57,216 INFO L85 PathProgramCache]: Analyzing trace with hash 108093540, now seen corresponding path program 1 times [2022-11-21 17:15:57,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:15:57,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081678301] [2022-11-21 17:15:57,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:15:57,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:15:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:15:57,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:15:57,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:15:57,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081678301] [2022-11-21 17:15:57,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081678301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:15:57,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:15:57,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 17:15:57,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204026856] [2022-11-21 17:15:57,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:15:57,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:15:57,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:15:57,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:15:57,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:15:57,435 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:15:57,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:15:57,533 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-11-21 17:15:57,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 17:15:57,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-21 17:15:57,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:15:57,534 INFO L225 Difference]: With dead ends: 45 [2022-11-21 17:15:57,535 INFO L226 Difference]: Without dead ends: 32 [2022-11-21 17:15:57,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:15:57,537 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:15:57,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 16 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:15:57,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-21 17:15:57,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-11-21 17:15:57,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:15:57,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-21 17:15:57,545 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2022-11-21 17:15:57,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:15:57,546 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-21 17:15:57,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:15:57,546 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-21 17:15:57,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-21 17:15:57,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:15:57,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:15:57,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 17:15:57,548 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:15:57,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:15:57,549 INFO L85 PathProgramCache]: Analyzing trace with hash 615941150, now seen corresponding path program 1 times [2022-11-21 17:15:57,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:15:57,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906116529] [2022-11-21 17:15:57,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:15:57,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:15:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:15:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:15:59,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:15:59,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906116529] [2022-11-21 17:15:59,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906116529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:15:59,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998887988] [2022-11-21 17:15:59,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:15:59,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:15:59,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:15:59,071 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:15:59,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 17:15:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:15:59,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-21 17:15:59,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:15:59,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 17:15:59,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 17:15:59,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 17:15:59,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-21 17:15:59,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-21 17:16:00,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 29 [2022-11-21 17:16:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:16:00,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:16:00,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:16:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:16:00,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998887988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:16:00,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:16:00,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 34 [2022-11-21 17:16:00,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014297235] [2022-11-21 17:16:00,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:16:00,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 17:16:00,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:16:00,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 17:16:00,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 17:16:00,757 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:16:02,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:16:02,871 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2022-11-21 17:16:02,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 17:16:02,871 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-21 17:16:02,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:16:02,872 INFO L225 Difference]: With dead ends: 56 [2022-11-21 17:16:02,873 INFO L226 Difference]: Without dead ends: 54 [2022-11-21 17:16:02,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=485, Invalid=2485, Unknown=0, NotChecked=0, Total=2970 [2022-11-21 17:16:02,876 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 183 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:16:02,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 130 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 17:16:02,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-21 17:16:02,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2022-11-21 17:16:02,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:16:02,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-11-21 17:16:02,888 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 20 [2022-11-21 17:16:02,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:16:02,889 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-11-21 17:16:02,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:16:02,889 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-11-21 17:16:02,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 17:16:02,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:16:02,890 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:16:02,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 17:16:03,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:16:03,097 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:16:03,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:16:03,098 INFO L85 PathProgramCache]: Analyzing trace with hash 952727132, now seen corresponding path program 2 times [2022-11-21 17:16:03,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:16:03,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510411363] [2022-11-21 17:16:03,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:16:03,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:16:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:16:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:16:03,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:16:03,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510411363] [2022-11-21 17:16:03,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510411363] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:16:03,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421671513] [2022-11-21 17:16:03,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:16:03,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:16:03,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:16:03,204 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:16:03,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 17:16:03,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:16:03,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:16:03,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 17:16:03,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:16:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:16:03,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:16:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:16:03,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421671513] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:16:03,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:16:03,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-21 17:16:03,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069245687] [2022-11-21 17:16:03,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:16:03,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 17:16:03,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:16:03,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 17:16:03,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-21 17:16:03,462 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:16:03,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:16:03,772 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2022-11-21 17:16:03,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 17:16:03,773 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-21 17:16:03,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:16:03,774 INFO L225 Difference]: With dead ends: 76 [2022-11-21 17:16:03,774 INFO L226 Difference]: Without dead ends: 44 [2022-11-21 17:16:03,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-11-21 17:16:03,776 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 121 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:16:03,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 88 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:16:03,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-21 17:16:03,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2022-11-21 17:16:03,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:16:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-11-21 17:16:03,785 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2022-11-21 17:16:03,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:16:03,785 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-11-21 17:16:03,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:16:03,786 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-11-21 17:16:03,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-21 17:16:03,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:16:03,787 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:16:03,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 17:16:03,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:16:03,994 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:16:03,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:16:03,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1304966232, now seen corresponding path program 3 times [2022-11-21 17:16:03,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:16:03,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609797118] [2022-11-21 17:16:03,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:16:03,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:16:04,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:16:05,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:16:05,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:16:05,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609797118] [2022-11-21 17:16:05,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609797118] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:16:05,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257171230] [2022-11-21 17:16:05,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:16:05,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:16:05,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:16:05,979 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:16:05,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 17:16:06,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 17:16:06,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:16:06,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-21 17:16:06,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:16:06,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 17:16:06,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:16:06,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 17:16:06,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:16:06,395 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-21 17:16:06,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-21 17:16:06,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:16:06,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:16:06,800 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-21 17:16:06,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 41 [2022-11-21 17:16:07,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:16:07,023 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-21 17:16:07,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 48 [2022-11-21 17:16:07,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:16:07,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:16:07,595 INFO L321 Elim1Store]: treesize reduction 68, result has 42.9 percent of original size [2022-11-21 17:16:07,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 65 treesize of output 82 [2022-11-21 17:16:08,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:16:08,503 INFO L321 Elim1Store]: treesize reduction 154, result has 39.8 percent of original size [2022-11-21 17:16:08,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 108 treesize of output 178 [2022-11-21 17:16:11,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:16:11,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 29 [2022-11-21 17:16:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:16:11,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:16:14,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:16:14,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:16:14,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:16:14,613 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-21 17:16:14,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 1 [2022-11-21 17:16:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:16:14,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257171230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:16:14,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:16:14,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 22] total 61 [2022-11-21 17:16:14,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788900617] [2022-11-21 17:16:14,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:16:14,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-21 17:16:14,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:16:14,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-21 17:16:14,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=3242, Unknown=0, NotChecked=0, Total=3660 [2022-11-21 17:16:14,622 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 61 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:16:48,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:16:48,451 INFO L93 Difference]: Finished difference Result 157 states and 174 transitions. [2022-11-21 17:16:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-21 17:16:48,452 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-21 17:16:48,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:16:48,454 INFO L225 Difference]: With dead ends: 157 [2022-11-21 17:16:48,454 INFO L226 Difference]: Without dead ends: 155 [2022-11-21 17:16:48,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6619 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=2670, Invalid=19980, Unknown=0, NotChecked=0, Total=22650 [2022-11-21 17:16:48,463 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 740 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:16:48,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [740 Valid, 297 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-21 17:16:48,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-21 17:16:48,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 66. [2022-11-21 17:16:48,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2) internal successors, (78), 65 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:16:48,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2022-11-21 17:16:48,491 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 26 [2022-11-21 17:16:48,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:16:48,491 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2022-11-21 17:16:48,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:16:48,492 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2022-11-21 17:16:48,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-21 17:16:48,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:16:48,493 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:16:48,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 17:16:48,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:16:48,705 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:16:48,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:16:48,706 INFO L85 PathProgramCache]: Analyzing trace with hash 341343694, now seen corresponding path program 1 times [2022-11-21 17:16:48,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:16:48,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459622739] [2022-11-21 17:16:48,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:16:48,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:16:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:16:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:16:50,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:16:50,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459622739] [2022-11-21 17:16:50,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459622739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:16:50,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241935703] [2022-11-21 17:16:50,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:16:50,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:16:50,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:16:50,439 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:16:50,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 17:16:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:16:50,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-21 17:16:50,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:16:50,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 17:16:50,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 17:16:50,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 17:16:50,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:16:50,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-21 17:16:51,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:16:51,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2022-11-21 17:16:51,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:16:51,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:16:51,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-11-21 17:16:51,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:16:51,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:16:51,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2022-11-21 17:16:51,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 25 [2022-11-21 17:16:51,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2022-11-21 17:16:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:16:51,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:16:53,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:16:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:16:53,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241935703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:16:53,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:16:53,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 19] total 53 [2022-11-21 17:16:53,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979619248] [2022-11-21 17:16:53,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:16:53,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-21 17:16:53,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:16:53,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-21 17:16:53,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=2473, Unknown=0, NotChecked=0, Total=2756 [2022-11-21 17:16:53,909 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 53 states, 53 states have (on average 1.509433962264151) internal successors, (80), 53 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:17:12,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:17:12,623 INFO L93 Difference]: Finished difference Result 152 states and 171 transitions. [2022-11-21 17:17:12,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-21 17:17:12,623 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.509433962264151) internal successors, (80), 53 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-21 17:17:12,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:17:12,624 INFO L225 Difference]: With dead ends: 152 [2022-11-21 17:17:12,624 INFO L226 Difference]: Without dead ends: 143 [2022-11-21 17:17:12,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4163 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=1415, Invalid=11925, Unknown=0, NotChecked=0, Total=13340 [2022-11-21 17:17:12,631 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 397 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:17:12,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 302 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-21 17:17:12,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-21 17:17:12,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 88. [2022-11-21 17:17:12,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.206896551724138) internal successors, (105), 87 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:17:12,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 105 transitions. [2022-11-21 17:17:12,665 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 105 transitions. Word has length 30 [2022-11-21 17:17:12,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:17:12,666 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 105 transitions. [2022-11-21 17:17:12,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.509433962264151) internal successors, (80), 53 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:17:12,666 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 105 transitions. [2022-11-21 17:17:12,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-21 17:17:12,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:17:12,667 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:17:12,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 17:17:12,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:17:12,871 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:17:12,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:17:12,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1941187564, now seen corresponding path program 4 times [2022-11-21 17:17:12,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:17:12,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999463962] [2022-11-21 17:17:12,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:17:12,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:17:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:17:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 17:17:13,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:17:13,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999463962] [2022-11-21 17:17:13,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999463962] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:17:13,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967241693] [2022-11-21 17:17:13,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 17:17:13,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:17:13,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:17:13,017 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:17:13,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 17:17:13,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 17:17:13,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:17:13,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 17:17:13,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:17:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 17:17:13,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:17:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 17:17:13,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967241693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:17:13,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:17:13,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-21 17:17:13,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650132053] [2022-11-21 17:17:13,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:17:13,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 17:17:13,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:17:13,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 17:17:13,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-21 17:17:13,257 INFO L87 Difference]: Start difference. First operand 88 states and 105 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:17:13,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:17:13,482 INFO L93 Difference]: Finished difference Result 157 states and 179 transitions. [2022-11-21 17:17:13,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 17:17:13,483 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-21 17:17:13,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:17:13,484 INFO L225 Difference]: With dead ends: 157 [2022-11-21 17:17:13,484 INFO L226 Difference]: Without dead ends: 94 [2022-11-21 17:17:13,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-21 17:17:13,486 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 100 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:17:13,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 65 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:17:13,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-21 17:17:13,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 69. [2022-11-21 17:17:13,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.161764705882353) internal successors, (79), 68 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:17:13,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2022-11-21 17:17:13,534 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 30 [2022-11-21 17:17:13,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:17:13,536 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2022-11-21 17:17:13,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:17:13,536 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2022-11-21 17:17:13,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-21 17:17:13,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:17:13,539 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:17:13,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 17:17:13,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:17:13,746 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:17:13,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:17:13,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1672696980, now seen corresponding path program 5 times [2022-11-21 17:17:13,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:17:13,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60793046] [2022-11-21 17:17:13,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:17:13,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:17:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:17:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 17:17:13,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:17:13,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60793046] [2022-11-21 17:17:13,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60793046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:17:13,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269001100] [2022-11-21 17:17:13,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 17:17:13,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:17:13,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:17:13,915 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:17:13,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 17:17:14,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-21 17:17:14,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:17:14,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 17:17:14,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:17:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 17:17:14,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:17:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 17:17:14,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269001100] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:17:14,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:17:14,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-21 17:17:14,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104407088] [2022-11-21 17:17:14,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:17:14,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 17:17:14,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:17:14,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 17:17:14,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-21 17:17:14,180 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:17:14,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:17:14,379 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2022-11-21 17:17:14,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 17:17:14,380 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-21 17:17:14,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:17:14,381 INFO L225 Difference]: With dead ends: 91 [2022-11-21 17:17:14,381 INFO L226 Difference]: Without dead ends: 67 [2022-11-21 17:17:14,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2022-11-21 17:17:14,382 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 122 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:17:14,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 64 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:17:14,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-21 17:17:14,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 35. [2022-11-21 17:17:14,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:17:14,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-11-21 17:17:14,394 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 30 [2022-11-21 17:17:14,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:17:14,395 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-11-21 17:17:14,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:17:14,395 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-11-21 17:17:14,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-21 17:17:14,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:17:14,396 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] [2022-11-21 17:17:14,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 17:17:14,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-21 17:17:14,603 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:17:14,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:17:14,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1505554158, now seen corresponding path program 6 times [2022-11-21 17:17:14,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:17:14,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753182894] [2022-11-21 17:17:14,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:17:14,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:17:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:17:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:17:16,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:17:16,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753182894] [2022-11-21 17:17:16,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753182894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:17:16,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972468801] [2022-11-21 17:17:16,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 17:17:16,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:17:16,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:17:16,963 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:17:16,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 17:17:17,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-21 17:17:17,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:17:17,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-21 17:17:17,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:17:17,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 17:17:17,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:17,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 17:17:17,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:17,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:17,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-21 17:17:17,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:17,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:17,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:17,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 47 [2022-11-21 17:17:17,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:17,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:17,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:17,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2022-11-21 17:17:18,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:18,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:18,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:18,026 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-21 17:17:18,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 58 [2022-11-21 17:17:18,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:18,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:18,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:18,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:18,228 INFO L321 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-11-21 17:17:18,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 72 [2022-11-21 17:17:18,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:18,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:18,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:18,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:18,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:17:18,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:18,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:17:18,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:17:18,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 59 [2022-11-21 17:17:19,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:19,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:19,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:19,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:19,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:19,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:17:19,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 53 [2022-11-21 17:17:19,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:19,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:19,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:19,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:17:19,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2022-11-21 17:17:19,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:19,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2022-11-21 17:17:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:17:19,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:17:23,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:17:23,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:17:23,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:23,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:17:23,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:17:23,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:17:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:17:23,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972468801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:17:23,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:17:23,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27, 25] total 72 [2022-11-21 17:17:23,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279560733] [2022-11-21 17:17:23,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:17:23,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-21 17:17:23,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:17:23,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-21 17:17:23,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=4635, Unknown=0, NotChecked=0, Total=5112 [2022-11-21 17:17:23,207 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 72 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 72 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:19:24,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:19:24,671 INFO L93 Difference]: Finished difference Result 207 states and 223 transitions. [2022-11-21 17:19:24,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-11-21 17:19:24,671 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 72 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-21 17:19:24,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:19:24,672 INFO L225 Difference]: With dead ends: 207 [2022-11-21 17:19:24,672 INFO L226 Difference]: Without dead ends: 205 [2022-11-21 17:19:24,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10327 ImplicationChecksByTransitivity, 121.3s TimeCoverageRelationStatistics Valid=3303, Invalid=29277, Unknown=0, NotChecked=0, Total=32580 [2022-11-21 17:19:24,679 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 907 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-21 17:19:24,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 531 Invalid, 1828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-21 17:19:24,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-21 17:19:24,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 62. [2022-11-21 17:19:24,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 61 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:19:24,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-11-21 17:19:24,711 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 32 [2022-11-21 17:19:24,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:19:24,711 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-11-21 17:19:24,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 72 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:19:24,711 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-11-21 17:19:24,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-21 17:19:24,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:19:24,712 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:19:24,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-21 17:19:24,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:19:24,918 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:19:24,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:19:24,918 INFO L85 PathProgramCache]: Analyzing trace with hash 526321296, now seen corresponding path program 7 times [2022-11-21 17:19:24,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:19:24,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222619539] [2022-11-21 17:19:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:19:24,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:19:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:19:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 17:19:25,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:19:25,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222619539] [2022-11-21 17:19:25,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222619539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:19:25,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617423551] [2022-11-21 17:19:25,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 17:19:25,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:19:25,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:19:25,075 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:19:25,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 17:19:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:19:25,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 17:19:25,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:19:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 17:19:25,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:19:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 17:19:25,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617423551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:19:25,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:19:25,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-21 17:19:25,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663158225] [2022-11-21 17:19:25,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:19:25,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-21 17:19:25,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:19:25,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-21 17:19:25,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-21 17:19:25,386 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:19:25,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:19:25,914 INFO L93 Difference]: Finished difference Result 137 states and 150 transitions. [2022-11-21 17:19:25,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 17:19:25,914 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-21 17:19:25,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:19:25,915 INFO L225 Difference]: With dead ends: 137 [2022-11-21 17:19:25,915 INFO L226 Difference]: Without dead ends: 119 [2022-11-21 17:19:25,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2022-11-21 17:19:25,917 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 113 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:19:25,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 206 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 17:19:25,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-21 17:19:25,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 74. [2022-11-21 17:19:25,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 73 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:19:25,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2022-11-21 17:19:25,960 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 34 [2022-11-21 17:19:25,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:19:25,960 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2022-11-21 17:19:25,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:19:25,961 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2022-11-21 17:19:25,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-21 17:19:25,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:19:25,962 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:19:25,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 17:19:26,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:19:26,170 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:19:26,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:19:26,170 INFO L85 PathProgramCache]: Analyzing trace with hash -968725112, now seen corresponding path program 2 times [2022-11-21 17:19:26,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:19:26,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627863444] [2022-11-21 17:19:26,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:19:26,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:19:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:19:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:19:29,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:19:29,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627863444] [2022-11-21 17:19:29,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627863444] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:19:29,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137959007] [2022-11-21 17:19:29,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:19:29,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:19:29,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:19:29,015 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:19:29,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 17:19:29,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:19:29,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:19:29,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-21 17:19:29,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:19:29,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 17:19:29,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:29,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 17:19:29,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:29,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:29,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-21 17:19:29,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:29,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:29,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:29,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:29,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2022-11-21 17:19:30,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:30,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:30,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:19:30,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:30,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-11-21 17:19:30,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:30,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:30,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:30,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:30,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:30,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:19:30,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 49 [2022-11-21 17:19:30,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:30,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:30,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:30,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 51 [2022-11-21 17:19:30,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:30,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:30,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:30,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:19:30,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 54 [2022-11-21 17:19:30,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:30,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:30,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:19:30,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 39 [2022-11-21 17:19:31,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:31,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-11-21 17:19:31,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:19:31,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 29 [2022-11-21 17:19:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:19:31,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:19:36,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:19:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:19:36,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137959007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:19:36,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:19:36,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 25] total 73 [2022-11-21 17:19:36,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304318954] [2022-11-21 17:19:36,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:19:36,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-21 17:19:36,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:19:36,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-21 17:19:36,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=4788, Unknown=0, NotChecked=0, Total=5256 [2022-11-21 17:19:36,482 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 73 states, 73 states have (on average 1.356164383561644) internal successors, (99), 73 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:20:41,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:20:41,245 INFO L93 Difference]: Finished difference Result 229 states and 248 transitions. [2022-11-21 17:20:41,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-11-21 17:20:41,246 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.356164383561644) internal successors, (99), 73 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-21 17:20:41,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:20:41,247 INFO L225 Difference]: With dead ends: 229 [2022-11-21 17:20:41,247 INFO L226 Difference]: Without dead ends: 205 [2022-11-21 17:20:41,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10664 ImplicationChecksByTransitivity, 66.3s TimeCoverageRelationStatistics Valid=2915, Invalid=29305, Unknown=0, NotChecked=0, Total=32220 [2022-11-21 17:20:41,251 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 652 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 1966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:20:41,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 569 Invalid, 1966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1645 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-21 17:20:41,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-21 17:20:41,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 87. [2022-11-21 17:20:41,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1511627906976745) internal successors, (99), 86 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:20:41,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2022-11-21 17:20:41,294 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 36 [2022-11-21 17:20:41,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:20:41,294 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2022-11-21 17:20:41,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.356164383561644) internal successors, (99), 73 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:20:41,295 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2022-11-21 17:20:41,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-21 17:20:41,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:20:41,295 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:20:41,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 17:20:41,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-21 17:20:41,496 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:20:41,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:20:41,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1060821388, now seen corresponding path program 8 times [2022-11-21 17:20:41,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:20:41,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63590059] [2022-11-21 17:20:41,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:20:41,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:20:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:20:41,697 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 17:20:41,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:20:41,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63590059] [2022-11-21 17:20:41,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63590059] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:20:41,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991071302] [2022-11-21 17:20:41,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:20:41,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:20:41,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:20:41,699 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:20:41,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 17:20:41,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:20:41,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:20:41,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 17:20:41,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:20:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 17:20:41,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:20:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 17:20:42,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991071302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:20:42,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:20:42,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 19 [2022-11-21 17:20:42,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601060701] [2022-11-21 17:20:42,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:20:42,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-21 17:20:42,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:20:42,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-21 17:20:42,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-11-21 17:20:42,041 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:20:42,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:20:42,329 INFO L93 Difference]: Finished difference Result 149 states and 163 transitions. [2022-11-21 17:20:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 17:20:42,330 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-21 17:20:42,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:20:42,332 INFO L225 Difference]: With dead ends: 149 [2022-11-21 17:20:42,332 INFO L226 Difference]: Without dead ends: 97 [2022-11-21 17:20:42,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-11-21 17:20:42,336 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 110 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:20:42,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 91 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:20:42,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-21 17:20:42,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2022-11-21 17:20:42,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:20:42,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2022-11-21 17:20:42,375 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 38 [2022-11-21 17:20:42,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:20:42,376 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2022-11-21 17:20:42,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:20:42,376 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2022-11-21 17:20:42,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-21 17:20:42,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:20:42,377 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:20:42,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 17:20:42,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:20:42,582 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:20:42,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:20:42,582 INFO L85 PathProgramCache]: Analyzing trace with hash -389301684, now seen corresponding path program 9 times [2022-11-21 17:20:42,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:20:42,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21994986] [2022-11-21 17:20:42,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:20:42,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:20:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:20:45,537 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:20:45,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:20:45,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21994986] [2022-11-21 17:20:45,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21994986] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:20:45,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162814139] [2022-11-21 17:20:45,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:20:45,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:20:45,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:20:45,539 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:20:45,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_017acf51-2800-4f49-9ddb-bcefe5f8b3d4/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 17:20:45,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-21 17:20:45,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:20:45,721 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-21 17:20:45,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:20:45,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 17:20:45,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:45,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 17:20:46,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:46,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:46,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-21 17:20:46,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:46,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:46,194 INFO L321 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2022-11-21 17:20:46,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2022-11-21 17:20:46,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:46,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:46,410 INFO L321 Elim1Store]: treesize reduction 62, result has 21.5 percent of original size [2022-11-21 17:20:46,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 59 [2022-11-21 17:20:46,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:46,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:20:46,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:46,995 INFO L321 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2022-11-21 17:20:46,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 68 [2022-11-21 17:20:47,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:47,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:47,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:47,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:20:47,287 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2022-11-21 17:20:47,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 71 [2022-11-21 17:20:47,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:47,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:47,626 INFO L321 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-11-21 17:20:47,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 91 treesize of output 85 [2022-11-21 17:20:47,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:47,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:47,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:47,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:47,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:47,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:47,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:47,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:48,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:48,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:48,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:48,010 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-21 17:20:48,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 87 [2022-11-21 17:20:48,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:48,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:48,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:48,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:20:48,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:48,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:48,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:48,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:48,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:48,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:20:48,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:20:48,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:48,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 71 [2022-11-21 17:20:49,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:49,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:49,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:49,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:49,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:49,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:49,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:49,184 INFO L321 Elim1Store]: treesize reduction 59, result has 49.1 percent of original size [2022-11-21 17:20:49,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 103 [2022-11-21 17:20:49,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:49,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:20:49,890 INFO L321 Elim1Store]: treesize reduction 116, result has 68.9 percent of original size [2022-11-21 17:20:49,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 122 treesize of output 327 [2022-11-21 17:22:42,396 WARN L233 SmtUtils]: Spent 30.35s on a formula simplification. DAG size of input: 1366 DAG size of output: 108 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:22:43,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:22:43,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:22:45,039 INFO L321 Elim1Store]: treesize reduction 205, result has 77.8 percent of original size [2022-11-21 17:22:45,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 2 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 54 case distinctions, treesize of input 312 treesize of output 892