./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0e55420715ff80c27c9ff14eb8ac6a520210206e33b4fd081fea4bf1c2e05be --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 16:43:28,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:43:28,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:43:28,998 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:43:28,999 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:43:29,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:43:29,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:43:29,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:43:29,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:43:29,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:43:29,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:43:29,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:43:29,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:43:29,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:43:29,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:43:29,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:43:29,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:43:29,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:43:29,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:43:29,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:43:29,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:43:29,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:43:29,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:43:29,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:43:29,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:43:29,025 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:43:29,026 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:43:29,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:43:29,027 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:43:29,028 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:43:29,028 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:43:29,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:43:29,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:43:29,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:43:29,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:43:29,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:43:29,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:43:29,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:43:29,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:43:29,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:43:29,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:43:29,035 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 16:43:29,055 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:43:29,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:43:29,056 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:43:29,056 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:43:29,057 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:43:29,057 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:43:29,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:43:29,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:43:29,058 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:43:29,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:43:29,058 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:43:29,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:43:29,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:43:29,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:43:29,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 16:43:29,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:43:29,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 16:43:29,059 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:43:29,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 16:43:29,059 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:43:29,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 16:43:29,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:43:29,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:43:29,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:43:29,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:43:29,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:43:29,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:43:29,061 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 16:43:29,061 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:43:29,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:43:29,061 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:43:29,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 16:43:29,062 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:43:29,062 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:43:29,062 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:43:29,062 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e55420715ff80c27c9ff14eb8ac6a520210206e33b4fd081fea4bf1c2e05be [2022-12-13 16:43:29,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:43:29,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:43:29,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:43:29,271 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:43:29,271 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:43:29,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/loop-simple/nested_6.c [2022-12-13 16:43:31,833 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:43:31,979 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:43:31,979 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/sv-benchmarks/c/loop-simple/nested_6.c [2022-12-13 16:43:31,983 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/data/ab5039eca/135bdf329d8049a3b259818870dd4764/FLAG07c2c8ccd [2022-12-13 16:43:31,995 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/data/ab5039eca/135bdf329d8049a3b259818870dd4764 [2022-12-13 16:43:31,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:43:31,998 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:43:31,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:43:31,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:43:32,002 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:43:32,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:43:31" (1/1) ... [2022-12-13 16:43:32,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e3e9e3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:32, skipping insertion in model container [2022-12-13 16:43:32,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:43:31" (1/1) ... [2022-12-13 16:43:32,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:43:32,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:43:32,145 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_967691a9-f990-4ede-b174-09b054b722d2/sv-benchmarks/c/loop-simple/nested_6.c[959,972] [2022-12-13 16:43:32,149 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:43:32,156 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:43:32,167 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_967691a9-f990-4ede-b174-09b054b722d2/sv-benchmarks/c/loop-simple/nested_6.c[959,972] [2022-12-13 16:43:32,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:43:32,177 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:43:32,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:32 WrapperNode [2022-12-13 16:43:32,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:43:32,178 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:43:32,178 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:43:32,178 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:43:32,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:32" (1/1) ... [2022-12-13 16:43:32,188 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:32" (1/1) ... [2022-12-13 16:43:32,200 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 68 [2022-12-13 16:43:32,200 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:43:32,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:43:32,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:43:32,201 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:43:32,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:32" (1/1) ... [2022-12-13 16:43:32,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:32" (1/1) ... [2022-12-13 16:43:32,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:32" (1/1) ... [2022-12-13 16:43:32,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:32" (1/1) ... [2022-12-13 16:43:32,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:32" (1/1) ... [2022-12-13 16:43:32,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:32" (1/1) ... [2022-12-13 16:43:32,213 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:32" (1/1) ... [2022-12-13 16:43:32,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:32" (1/1) ... [2022-12-13 16:43:32,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:43:32,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:43:32,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:43:32,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:43:32,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:32" (1/1) ... [2022-12-13 16:43:32,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:43:32,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:43:32,239 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:43:32,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:43:32,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:43:32,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:43:32,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:43:32,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:43:32,325 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:43:32,326 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:43:32,411 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:43:32,416 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:43:32,417 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 16:43:32,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:43:32 BoogieIcfgContainer [2022-12-13 16:43:32,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:43:32,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:43:32,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:43:32,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:43:32,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:43:31" (1/3) ... [2022-12-13 16:43:32,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3bbf71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:43:32, skipping insertion in model container [2022-12-13 16:43:32,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:32" (2/3) ... [2022-12-13 16:43:32,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3bbf71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:43:32, skipping insertion in model container [2022-12-13 16:43:32,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:43:32" (3/3) ... [2022-12-13 16:43:32,425 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_6.c [2022-12-13 16:43:32,440 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:43:32,440 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 16:43:32,478 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:43:32,483 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;@71237db5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:43:32,483 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 16:43:32,486 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:32,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-13 16:43:32,491 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:32,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 16:43:32,492 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:32,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:32,495 INFO L85 PathProgramCache]: Analyzing trace with hash 28698918, now seen corresponding path program 1 times [2022-12-13 16:43:32,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:32,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571805667] [2022-12-13 16:43:32,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:32,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:43:32,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:32,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571805667] [2022-12-13 16:43:32,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571805667] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:43:32,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:43:32,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:43:32,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662607536] [2022-12-13 16:43:32,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:43:32,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:43:32,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:32,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:43:32,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:32,666 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:32,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:32,693 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2022-12-13 16:43:32,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:43:32,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-12-13 16:43:32,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:32,702 INFO L225 Difference]: With dead ends: 52 [2022-12-13 16:43:32,702 INFO L226 Difference]: Without dead ends: 29 [2022-12-13 16:43:32,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:32,706 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:43:32,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 44 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:43:32,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-13 16:43:32,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2022-12-13 16:43:32,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 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) [2022-12-13 16:43:32,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2022-12-13 16:43:32,732 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 5 [2022-12-13 16:43:32,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:32,733 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2022-12-13 16:43:32,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:32,733 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2022-12-13 16:43:32,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 16:43:32,733 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:32,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:43:32,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:43:32,734 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:32,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:32,734 INFO L85 PathProgramCache]: Analyzing trace with hash 270775882, now seen corresponding path program 1 times [2022-12-13 16:43:32,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:32,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118247525] [2022-12-13 16:43:32,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:32,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:43:32,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:32,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118247525] [2022-12-13 16:43:32,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118247525] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:43:32,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:43:32,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:43:32,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072391463] [2022-12-13 16:43:32,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:43:32,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:43:32,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:32,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:43:32,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:32,778 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:32,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:32,794 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2022-12-13 16:43:32,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:43:32,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-12-13 16:43:32,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:32,795 INFO L225 Difference]: With dead ends: 43 [2022-12-13 16:43:32,795 INFO L226 Difference]: Without dead ends: 28 [2022-12-13 16:43:32,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:32,796 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:43:32,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:43:32,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-13 16:43:32,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2022-12-13 16:43:32,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:32,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-12-13 16:43:32,800 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 8 [2022-12-13 16:43:32,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:32,800 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-12-13 16:43:32,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:32,800 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-12-13 16:43:32,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 16:43:32,801 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:32,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:43:32,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 16:43:32,801 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:32,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:32,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1936160826, now seen corresponding path program 1 times [2022-12-13 16:43:32,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:32,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98159560] [2022-12-13 16:43:32,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:32,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:43:32,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:32,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98159560] [2022-12-13 16:43:32,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98159560] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:43:32,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:43:32,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:43:32,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066016656] [2022-12-13 16:43:32,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:43:32,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:43:32,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:32,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:43:32,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:32,849 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:32,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:32,865 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2022-12-13 16:43:32,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:43:32,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-13 16:43:32,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:32,866 INFO L225 Difference]: With dead ends: 43 [2022-12-13 16:43:32,866 INFO L226 Difference]: Without dead ends: 27 [2022-12-13 16:43:32,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:32,867 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:43:32,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:43:32,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-13 16:43:32,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2022-12-13 16:43:32,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:32,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-12-13 16:43:32,872 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2022-12-13 16:43:32,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:32,872 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-12-13 16:43:32,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:32,873 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-12-13 16:43:32,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 16:43:32,873 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:32,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:43:32,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 16:43:32,874 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:32,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:32,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1227454858, now seen corresponding path program 1 times [2022-12-13 16:43:32,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:32,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533838650] [2022-12-13 16:43:32,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:32,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:32,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:43:32,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:32,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533838650] [2022-12-13 16:43:32,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533838650] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:43:32,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:43:32,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:43:32,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329670089] [2022-12-13 16:43:32,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:43:32,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:43:32,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:32,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:43:32,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:32,918 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2022-12-13 16:43:32,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:32,933 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2022-12-13 16:43:32,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:43:32,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-12-13 16:43:32,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:32,934 INFO L225 Difference]: With dead ends: 43 [2022-12-13 16:43:32,934 INFO L226 Difference]: Without dead ends: 26 [2022-12-13 16:43:32,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:32,936 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:43:32,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:43:32,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-13 16:43:32,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-12-13 16:43:32,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:32,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-12-13 16:43:32,941 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 14 [2022-12-13 16:43:32,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:32,941 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-12-13 16:43:32,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:32,941 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-12-13 16:43:32,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 16:43:32,942 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:32,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:43:32,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 16:43:32,942 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:32,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:32,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1691120258, now seen corresponding path program 1 times [2022-12-13 16:43:32,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:32,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429211702] [2022-12-13 16:43:32,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:32,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:32,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:43:32,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:32,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429211702] [2022-12-13 16:43:32,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429211702] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:43:32,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:43:32,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:43:32,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460543684] [2022-12-13 16:43:32,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:43:32,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:43:32,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:32,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:43:32,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:33,000 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:33,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:33,014 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-12-13 16:43:33,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:43:33,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-13 16:43:33,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:33,015 INFO L225 Difference]: With dead ends: 43 [2022-12-13 16:43:33,015 INFO L226 Difference]: Without dead ends: 25 [2022-12-13 16:43:33,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:33,017 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:43:33,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:43:33,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-13 16:43:33,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-12-13 16:43:33,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:33,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-12-13 16:43:33,022 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 17 [2022-12-13 16:43:33,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:33,023 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-12-13 16:43:33,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:33,023 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-12-13 16:43:33,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-13 16:43:33,023 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:33,024 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] [2022-12-13 16:43:33,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 16:43:33,024 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:33,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:33,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1077656366, now seen corresponding path program 1 times [2022-12-13 16:43:33,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:33,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634715999] [2022-12-13 16:43:33,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:33,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:43:33,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:33,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634715999] [2022-12-13 16:43:33,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634715999] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:43:33,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:43:33,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:43:33,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520535994] [2022-12-13 16:43:33,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:43:33,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:43:33,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:33,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:43:33,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:33,079 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:33,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:33,091 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-12-13 16:43:33,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:43:33,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-13 16:43:33,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:33,093 INFO L225 Difference]: With dead ends: 43 [2022-12-13 16:43:33,093 INFO L226 Difference]: Without dead ends: 24 [2022-12-13 16:43:33,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:33,094 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:43:33,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:43:33,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-13 16:43:33,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-12-13 16:43:33,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:33,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-12-13 16:43:33,098 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 20 [2022-12-13 16:43:33,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:33,098 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-12-13 16:43:33,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:33,098 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-12-13 16:43:33,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 16:43:33,099 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:33,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:43:33,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 16:43:33,100 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:33,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:33,100 INFO L85 PathProgramCache]: Analyzing trace with hash -624839792, now seen corresponding path program 1 times [2022-12-13 16:43:33,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:33,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636937257] [2022-12-13 16:43:33,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:33,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:43:33,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:33,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636937257] [2022-12-13 16:43:33,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636937257] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:43:33,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993804634] [2022-12-13 16:43:33,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:33,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:33,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:43:33,148 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:43:33,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:43:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:33,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:43:33,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:43:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:43:33,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:43:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:43:33,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993804634] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:43:33,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:43:33,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-13 16:43:33,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410728800] [2022-12-13 16:43:33,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:43:33,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:43:33,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:33,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:43:33,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:43:33,247 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:33,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:33,275 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2022-12-13 16:43:33,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:43:33,275 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-13 16:43:33,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:33,276 INFO L225 Difference]: With dead ends: 49 [2022-12-13 16:43:33,276 INFO L226 Difference]: Without dead ends: 29 [2022-12-13 16:43:33,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:43:33,277 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:43:33,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 84 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:43:33,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-13 16:43:33,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-12-13 16:43:33,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 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) [2022-12-13 16:43:33,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-12-13 16:43:33,282 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 22 [2022-12-13 16:43:33,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:33,282 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-12-13 16:43:33,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:33,282 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-12-13 16:43:33,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 16:43:33,283 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:33,283 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:43:33,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:43:33,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:33,485 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:33,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:33,487 INFO L85 PathProgramCache]: Analyzing trace with hash -222481718, now seen corresponding path program 2 times [2022-12-13 16:43:33,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:33,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704920157] [2022-12-13 16:43:33,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:33,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 16:43:33,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:33,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704920157] [2022-12-13 16:43:33,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704920157] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:43:33,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639171033] [2022-12-13 16:43:33,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:43:33,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:33,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:43:33,626 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:43:33,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:43:33,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:43:33,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:43:33,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:43:33,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:43:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:43:33,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:43:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:43:33,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639171033] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:43:33,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:43:33,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2022-12-13 16:43:33,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709012948] [2022-12-13 16:43:33,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:43:33,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 16:43:33,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:33,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 16:43:33,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:43:33,762 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:33,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:33,872 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2022-12-13 16:43:33,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 16:43:33,872 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-12-13 16:43:33,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:33,873 INFO L225 Difference]: With dead ends: 88 [2022-12-13 16:43:33,873 INFO L226 Difference]: Without dead ends: 62 [2022-12-13 16:43:33,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2022-12-13 16:43:33,874 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:43:33,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 91 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:43:33,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-12-13 16:43:33,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2022-12-13 16:43:33,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:33,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-12-13 16:43:33,882 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 28 [2022-12-13 16:43:33,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:33,882 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-12-13 16:43:33,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:33,882 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-12-13 16:43:33,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 16:43:33,883 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:33,883 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:43:33,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 16:43:34,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:34,086 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:34,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:34,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1455035518, now seen corresponding path program 3 times [2022-12-13 16:43:34,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:34,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16204377] [2022-12-13 16:43:34,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:34,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-12-13 16:43:34,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:34,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16204377] [2022-12-13 16:43:34,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16204377] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:43:34,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002961888] [2022-12-13 16:43:34,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:43:34,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:34,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:43:34,213 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:43:34,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:43:34,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 16:43:34,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:43:34,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:43:34,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:43:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-12-13 16:43:34,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:43:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-12-13 16:43:34,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002961888] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:43:34,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:43:34,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-12-13 16:43:34,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411040877] [2022-12-13 16:43:34,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:43:34,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 16:43:34,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:34,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 16:43:34,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:43:34,362 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:34,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:34,468 INFO L93 Difference]: Finished difference Result 479 states and 540 transitions. [2022-12-13 16:43:34,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 16:43:34,469 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 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 47 [2022-12-13 16:43:34,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:34,470 INFO L225 Difference]: With dead ends: 479 [2022-12-13 16:43:34,471 INFO L226 Difference]: Without dead ends: 434 [2022-12-13 16:43:34,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2022-12-13 16:43:34,471 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 92 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:43:34,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 81 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:43:34,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-12-13 16:43:34,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 306. [2022-12-13 16:43:34,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.1213114754098361) internal successors, (342), 305 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:34,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 342 transitions. [2022-12-13 16:43:34,497 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 342 transitions. Word has length 47 [2022-12-13 16:43:34,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:34,497 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 342 transitions. [2022-12-13 16:43:34,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:34,498 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 342 transitions. [2022-12-13 16:43:34,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-12-13 16:43:34,502 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:34,502 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-12-13 16:43:34,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 16:43:34,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 16:43:34,704 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:34,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:34,704 INFO L85 PathProgramCache]: Analyzing trace with hash -107592410, now seen corresponding path program 4 times [2022-12-13 16:43:34,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:34,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039864130] [2022-12-13 16:43:34,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:34,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11350 backedges. 4301 proven. 1 refuted. 0 times theorem prover too weak. 7048 trivial. 0 not checked. [2022-12-13 16:43:34,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:34,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039864130] [2022-12-13 16:43:34,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039864130] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:43:34,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013594282] [2022-12-13 16:43:34,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:43:34,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:34,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:43:34,925 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:43:34,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 16:43:35,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:43:35,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:43:35,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 16:43:35,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:43:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11350 backedges. 2500 proven. 89 refuted. 0 times theorem prover too weak. 8761 trivial. 0 not checked. [2022-12-13 16:43:35,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:43:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11350 backedges. 2500 proven. 89 refuted. 0 times theorem prover too weak. 8761 trivial. 0 not checked. [2022-12-13 16:43:35,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013594282] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:43:35,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:43:35,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2022-12-13 16:43:35,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027170814] [2022-12-13 16:43:35,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:43:35,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 16:43:35,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:35,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 16:43:35,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:43:35,161 INFO L87 Difference]: Start difference. First operand 306 states and 342 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:35,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:35,433 INFO L93 Difference]: Finished difference Result 2596 states and 2920 transitions. [2022-12-13 16:43:35,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 16:43:35,434 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 305 [2022-12-13 16:43:35,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:35,438 INFO L225 Difference]: With dead ends: 2596 [2022-12-13 16:43:35,438 INFO L226 Difference]: Without dead ends: 2294 [2022-12-13 16:43:35,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 604 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2022-12-13 16:43:35,440 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 60 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:43:35,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 87 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:43:35,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2022-12-13 16:43:35,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 1542. [2022-12-13 16:43:35,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1541 states have (on average 1.0837118754055808) internal successors, (1670), 1541 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:35,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 1670 transitions. [2022-12-13 16:43:35,531 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 1670 transitions. Word has length 305 [2022-12-13 16:43:35,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:35,532 INFO L495 AbstractCegarLoop]: Abstraction has 1542 states and 1670 transitions. [2022-12-13 16:43:35,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:35,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 1670 transitions. [2022-12-13 16:43:35,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1542 [2022-12-13 16:43:35,585 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:35,585 INFO L195 NwaCegarLoop]: trace histogram [576, 576, 96, 96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-12-13 16:43:35,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 16:43:35,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:35,786 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:35,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:35,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1672164490, now seen corresponding path program 5 times [2022-12-13 16:43:35,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:35,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801065649] [2022-12-13 16:43:35,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:35,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:36,948 INFO L134 CoverageAnalysis]: Checked inductivity of 402372 backedges. 151174 proven. 1 refuted. 0 times theorem prover too weak. 251197 trivial. 0 not checked. [2022-12-13 16:43:36,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:36,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801065649] [2022-12-13 16:43:36,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801065649] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:43:36,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991923547] [2022-12-13 16:43:36,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 16:43:36,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:36,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:43:36,949 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:43:36,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 16:43:37,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 69 check-sat command(s) [2022-12-13 16:43:37,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:43:37,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 16:43:37,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:43:37,514 INFO L134 CoverageAnalysis]: Checked inductivity of 402372 backedges. 214152 proven. 3149 refuted. 0 times theorem prover too weak. 185071 trivial. 0 not checked. [2022-12-13 16:43:37,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:43:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 402372 backedges. 214152 proven. 3149 refuted. 0 times theorem prover too weak. 185071 trivial. 0 not checked. [2022-12-13 16:43:37,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991923547] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:43:37,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:43:37,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2022-12-13 16:43:37,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260108027] [2022-12-13 16:43:37,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:43:37,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 16:43:37,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:37,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 16:43:37,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:43:37,750 INFO L87 Difference]: Start difference. First operand 1542 states and 1670 transitions. Second operand has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:38,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:38,407 INFO L93 Difference]: Finished difference Result 15052 states and 16328 transitions. [2022-12-13 16:43:38,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 16:43:38,408 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 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 1541 [2022-12-13 16:43:38,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:38,450 INFO L225 Difference]: With dead ends: 15052 [2022-12-13 16:43:38,450 INFO L226 Difference]: Without dead ends: 13514 [2022-12-13 16:43:38,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3096 GetRequests, 3076 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2022-12-13 16:43:38,455 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 96 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:43:38,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 104 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:43:38,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13514 states. [2022-12-13 16:43:38,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13514 to 9018. [2022-12-13 16:43:38,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9018 states, 9017 states have (on average 1.0777420428080293) internal successors, (9718), 9017 states have internal predecessors, (9718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:39,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9018 states to 9018 states and 9718 transitions. [2022-12-13 16:43:39,004 INFO L78 Accepts]: Start accepts. Automaton has 9018 states and 9718 transitions. Word has length 1541 [2022-12-13 16:43:39,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:39,005 INFO L495 AbstractCegarLoop]: Abstraction has 9018 states and 9718 transitions. [2022-12-13 16:43:39,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:39,005 INFO L276 IsEmpty]: Start isEmpty. Operand 9018 states and 9718 transitions. [2022-12-13 16:43:39,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9018 [2022-12-13 16:43:39,434 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:39,435 INFO L195 NwaCegarLoop]: trace histogram [3456, 3456, 576, 576, 576, 96, 96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2022-12-13 16:43:39,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 16:43:39,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:39,637 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:39,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:39,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1229783514, now seen corresponding path program 6 times [2022-12-13 16:43:39,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:39,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749793151] [2022-12-13 16:43:39,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:39,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:44:02,655 INFO L134 CoverageAnalysis]: Checked inductivity of 14499074 backedges. 3172646 proven. 113309 refuted. 0 times theorem prover too weak. 11213119 trivial. 0 not checked. [2022-12-13 16:44:02,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:44:02,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749793151] [2022-12-13 16:44:02,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749793151] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:44:02,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277549843] [2022-12-13 16:44:02,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 16:44:02,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:44:02,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:44:02,657 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:44:02,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 16:44:07,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 755 check-sat command(s) [2022-12-13 16:44:07,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:44:07,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 5125 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 16:44:07,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:44:09,186 INFO L134 CoverageAnalysis]: Checked inductivity of 14499074 backedges. 3172656 proven. 113309 refuted. 0 times theorem prover too weak. 11213109 trivial. 0 not checked. [2022-12-13 16:44:09,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:44:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 14499074 backedges. 3172656 proven. 113309 refuted. 0 times theorem prover too weak. 11213109 trivial. 0 not checked. [2022-12-13 16:44:10,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277549843] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:44:10,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:44:10,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-13 16:44:10,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157763289] [2022-12-13 16:44:10,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:44:10,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 16:44:10,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:44:10,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 16:44:10,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-12-13 16:44:10,613 INFO L87 Difference]: Start difference. First operand 9018 states and 9718 transitions. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 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) [2022-12-13 16:44:11,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:44:11,808 INFO L93 Difference]: Finished difference Result 34861 states and 37582 transitions. [2022-12-13 16:44:11,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 16:44:11,808 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 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 9017 [2022-12-13 16:44:11,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:44:11,852 INFO L225 Difference]: With dead ends: 34861 [2022-12-13 16:44:11,852 INFO L226 Difference]: Without dead ends: 26970 [2022-12-13 16:44:11,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18037 GetRequests, 18030 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-12-13 16:44:11,862 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 20 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:44:11,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 88 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:44:11,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26970 states. [2022-12-13 16:44:13,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26970 to 26970. [2022-12-13 16:44:13,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26970 states, 26969 states have (on average 1.07701434980904) internal successors, (29046), 26969 states have internal predecessors, (29046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:44:13,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26970 states to 26970 states and 29046 transitions. [2022-12-13 16:44:13,201 INFO L78 Accepts]: Start accepts. Automaton has 26970 states and 29046 transitions. Word has length 9017 [2022-12-13 16:44:13,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:44:13,202 INFO L495 AbstractCegarLoop]: Abstraction has 26970 states and 29046 transitions. [2022-12-13 16:44:13,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 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) [2022-12-13 16:44:13,202 INFO L276 IsEmpty]: Start isEmpty. Operand 26970 states and 29046 transitions. [2022-12-13 16:44:16,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26970 [2022-12-13 16:44:16,004 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:44:16,008 INFO L195 NwaCegarLoop]: trace histogram [10368, 10368, 1728, 1728, 1728, 288, 288, 288, 48, 48, 48, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2022-12-13 16:44:16,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 16:44:16,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_967691a9-f990-4ede-b174-09b054b722d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 16:44:16,210 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:44:16,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:44:16,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2046182950, now seen corresponding path program 7 times [2022-12-13 16:44:16,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:44:16,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221031208] [2022-12-13 16:44:16,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:44:16,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:44:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat