./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label39.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_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/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_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label39.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/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_b2bb5130-0516-4b6d-9317-c0f334c452d2/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 e75b25accfa51338058ad16425748718d01a5d94bd667d18c22ba63a9d75c3da --- 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 17:52:42,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:52:42,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:52:42,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:52:42,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:52:42,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:52:42,949 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:52:42,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:52:42,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:52:42,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:52:42,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:52:42,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:52:42,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:52:42,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:52:42,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:52:42,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:52:42,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:52:42,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:52:42,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:52:42,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:52:42,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:52:42,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:52:42,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:52:42,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:52:42,971 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:52:42,971 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:52:42,971 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:52:42,972 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:52:42,973 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:52:42,973 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:52:42,973 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:52:42,974 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:52:42,974 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:52:42,975 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:52:42,976 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:52:42,976 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:52:42,977 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:52:42,977 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:52:42,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:52:42,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:52:42,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:52:42,979 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 17:52:42,999 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:52:42,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:52:42,999 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:52:42,999 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:52:43,000 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:52:43,006 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:52:43,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:52:43,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:52:43,007 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:52:43,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:52:43,007 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:52:43,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:52:43,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:52:43,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:52:43,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 17:52:43,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:52:43,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 17:52:43,009 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:52:43,009 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 17:52:43,009 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:52:43,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 17:52:43,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:52:43,009 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:52:43,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:52:43,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:52:43,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:52:43,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:52:43,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 17:52:43,010 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:52:43,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:52:43,011 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:52:43,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 17:52:43,011 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:52:43,011 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:52:43,011 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:52:43,011 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_b2bb5130-0516-4b6d-9317-c0f334c452d2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e75b25accfa51338058ad16425748718d01a5d94bd667d18c22ba63a9d75c3da [2022-12-13 17:52:43,205 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:52:43,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:52:43,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:52:43,230 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:52:43,230 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:52:43,232 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/eca-rers2012/Problem03_label39.c [2022-12-13 17:52:45,718 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:52:45,962 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:52:45,962 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/sv-benchmarks/c/eca-rers2012/Problem03_label39.c [2022-12-13 17:52:45,972 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/data/95c7aeab5/94c6c3d2da8245c9846f43a63f6b434f/FLAG5c7b0b379 [2022-12-13 17:52:46,289 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/data/95c7aeab5/94c6c3d2da8245c9846f43a63f6b434f [2022-12-13 17:52:46,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:52:46,292 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:52:46,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:52:46,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:52:46,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:52:46,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:52:46" (1/1) ... [2022-12-13 17:52:46,299 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@425150a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:46, skipping insertion in model container [2022-12-13 17:52:46,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:52:46" (1/1) ... [2022-12-13 17:52:46,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:52:46,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:52:46,707 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_b2bb5130-0516-4b6d-9317-c0f334c452d2/sv-benchmarks/c/eca-rers2012/Problem03_label39.c[54057,54070] [2022-12-13 17:52:46,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:52:46,744 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:52:46,955 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_b2bb5130-0516-4b6d-9317-c0f334c452d2/sv-benchmarks/c/eca-rers2012/Problem03_label39.c[54057,54070] [2022-12-13 17:52:46,968 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:52:46,982 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:52:46,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:46 WrapperNode [2022-12-13 17:52:46,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:52:46,983 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:52:46,984 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:52:46,984 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:52:46,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:46" (1/1) ... [2022-12-13 17:52:47,016 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:46" (1/1) ... [2022-12-13 17:52:47,090 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-12-13 17:52:47,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:52:47,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:52:47,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:52:47,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:52:47,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:46" (1/1) ... [2022-12-13 17:52:47,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:46" (1/1) ... [2022-12-13 17:52:47,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:46" (1/1) ... [2022-12-13 17:52:47,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:46" (1/1) ... [2022-12-13 17:52:47,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:46" (1/1) ... [2022-12-13 17:52:47,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:46" (1/1) ... [2022-12-13 17:52:47,159 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:46" (1/1) ... [2022-12-13 17:52:47,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:46" (1/1) ... [2022-12-13 17:52:47,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:52:47,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:52:47,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:52:47,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:52:47,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:46" (1/1) ... [2022-12-13 17:52:47,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:52:47,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:52:47,195 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:52:47,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:52:47,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:52:47,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:52:47,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:52:47,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:52:47,302 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:52:47,303 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:52:48,591 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:52:48,599 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:52:48,599 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 17:52:48,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:52:48 BoogieIcfgContainer [2022-12-13 17:52:48,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:52:48,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:52:48,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:52:48,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:52:48,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:52:46" (1/3) ... [2022-12-13 17:52:48,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e3fd36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:52:48, skipping insertion in model container [2022-12-13 17:52:48,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:46" (2/3) ... [2022-12-13 17:52:48,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e3fd36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:52:48, skipping insertion in model container [2022-12-13 17:52:48,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:52:48" (3/3) ... [2022-12-13 17:52:48,607 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label39.c [2022-12-13 17:52:48,621 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:52:48,621 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 17:52:48,660 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:52:48,664 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;@77201b46, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:52:48,665 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 17:52:48,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 17:52:48,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-13 17:52:48,677 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:52:48,678 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:48,678 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:52:48,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:48,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1090968285, now seen corresponding path program 1 times [2022-12-13 17:52:48,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:48,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833991286] [2022-12-13 17:52:48,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:48,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:48,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:49,209 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 17:52:49,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:49,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833991286] [2022-12-13 17:52:49,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833991286] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:52:49,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:52:49,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:52:49,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808615592] [2022-12-13 17:52:49,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:52:49,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:52:49,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:49,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:52:49,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:52:49,239 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 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 17:52:49,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:52:49,994 INFO L93 Difference]: Finished difference Result 836 states and 1480 transitions. [2022-12-13 17:52:49,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:52:49,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 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 147 [2022-12-13 17:52:49,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:52:50,004 INFO L225 Difference]: With dead ends: 836 [2022-12-13 17:52:50,004 INFO L226 Difference]: Without dead ends: 457 [2022-12-13 17:52:50,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 17:52:50,009 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 136 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 17:52:50,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 150 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 17:52:50,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-12-13 17:52:50,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 451. [2022-12-13 17:52:50,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5977777777777777) internal successors, (719), 450 states have internal predecessors, (719), 0 states have call successors, (0), 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 17:52:50,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 719 transitions. [2022-12-13 17:52:50,051 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 719 transitions. Word has length 147 [2022-12-13 17:52:50,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:52:50,051 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 719 transitions. [2022-12-13 17:52:50,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 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 17:52:50,052 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 719 transitions. [2022-12-13 17:52:50,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-12-13 17:52:50,054 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:52:50,054 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:50,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:52:50,054 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:52:50,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:50,055 INFO L85 PathProgramCache]: Analyzing trace with hash -780294121, now seen corresponding path program 1 times [2022-12-13 17:52:50,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:50,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222184642] [2022-12-13 17:52:50,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:50,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:50,274 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 17:52:50,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:50,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222184642] [2022-12-13 17:52:50,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222184642] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:52:50,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:52:50,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:52:50,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144900351] [2022-12-13 17:52:50,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:52:50,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:52:50,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:50,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:52:50,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:52:50,278 INFO L87 Difference]: Start difference. First operand 451 states and 719 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 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 17:52:50,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:52:50,908 INFO L93 Difference]: Finished difference Result 1340 states and 2142 transitions. [2022-12-13 17:52:50,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:52:50,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 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 153 [2022-12-13 17:52:50,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:52:50,915 INFO L225 Difference]: With dead ends: 1340 [2022-12-13 17:52:50,915 INFO L226 Difference]: Without dead ends: 891 [2022-12-13 17:52:50,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 17:52:50,918 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 17:52:50,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 141 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 17:52:50,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-12-13 17:52:50,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 886. [2022-12-13 17:52:50,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 1.5785310734463276) internal successors, (1397), 885 states have internal predecessors, (1397), 0 states have call successors, (0), 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 17:52:50,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1397 transitions. [2022-12-13 17:52:50,942 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1397 transitions. Word has length 153 [2022-12-13 17:52:50,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:52:50,942 INFO L495 AbstractCegarLoop]: Abstraction has 886 states and 1397 transitions. [2022-12-13 17:52:50,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 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 17:52:50,943 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1397 transitions. [2022-12-13 17:52:50,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-13 17:52:50,945 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:52:50,946 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:50,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:52:50,946 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:52:50,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:50,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1937089801, now seen corresponding path program 1 times [2022-12-13 17:52:50,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:50,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610694750] [2022-12-13 17:52:50,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:50,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:51,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:51,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610694750] [2022-12-13 17:52:51,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610694750] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:52:51,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:52:51,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:52:51,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045983445] [2022-12-13 17:52:51,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:52:51,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:52:51,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:51,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:52:51,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:52:51,145 INFO L87 Difference]: Start difference. First operand 886 states and 1397 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 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 17:52:51,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:52:51,852 INFO L93 Difference]: Finished difference Result 2605 states and 4115 transitions. [2022-12-13 17:52:51,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:52:51,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 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 157 [2022-12-13 17:52:51,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:52:51,856 INFO L225 Difference]: With dead ends: 2605 [2022-12-13 17:52:51,856 INFO L226 Difference]: Without dead ends: 1721 [2022-12-13 17:52:51,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 17:52:51,858 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 234 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 17:52:51,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 124 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 17:52:51,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-12-13 17:52:51,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1719. [2022-12-13 17:52:51,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.5017462165308497) internal successors, (2580), 1718 states have internal predecessors, (2580), 0 states have call successors, (0), 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 17:52:51,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2580 transitions. [2022-12-13 17:52:51,886 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2580 transitions. Word has length 157 [2022-12-13 17:52:51,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:52:51,886 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2580 transitions. [2022-12-13 17:52:51,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 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 17:52:51,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2580 transitions. [2022-12-13 17:52:51,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-13 17:52:51,889 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:52:51,889 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:51,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 17:52:51,890 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:52:51,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:51,890 INFO L85 PathProgramCache]: Analyzing trace with hash -2144550674, now seen corresponding path program 1 times [2022-12-13 17:52:51,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:51,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669698855] [2022-12-13 17:52:51,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:51,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:52,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:52,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669698855] [2022-12-13 17:52:52,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669698855] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:52:52,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:52:52,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:52:52,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894876621] [2022-12-13 17:52:52,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:52:52,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:52:52,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:52,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:52:52,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:52:52,146 INFO L87 Difference]: Start difference. First operand 1719 states and 2580 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 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 17:52:52,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:52:52,844 INFO L93 Difference]: Finished difference Result 5126 states and 7705 transitions. [2022-12-13 17:52:52,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:52:52,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 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 159 [2022-12-13 17:52:52,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:52:52,854 INFO L225 Difference]: With dead ends: 5126 [2022-12-13 17:52:52,854 INFO L226 Difference]: Without dead ends: 3409 [2022-12-13 17:52:52,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 17:52:52,858 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 275 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 17:52:52,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 181 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 17:52:52,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2022-12-13 17:52:52,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 3397. [2022-12-13 17:52:52,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3397 states, 3396 states have (on average 1.4840989399293287) internal successors, (5040), 3396 states have internal predecessors, (5040), 0 states have call successors, (0), 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 17:52:52,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3397 states to 3397 states and 5040 transitions. [2022-12-13 17:52:52,925 INFO L78 Accepts]: Start accepts. Automaton has 3397 states and 5040 transitions. Word has length 159 [2022-12-13 17:52:52,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:52:52,926 INFO L495 AbstractCegarLoop]: Abstraction has 3397 states and 5040 transitions. [2022-12-13 17:52:52,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 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 17:52:52,926 INFO L276 IsEmpty]: Start isEmpty. Operand 3397 states and 5040 transitions. [2022-12-13 17:52:52,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-13 17:52:52,931 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:52:52,931 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:52,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 17:52:52,931 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:52:52,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:52,932 INFO L85 PathProgramCache]: Analyzing trace with hash 741517523, now seen corresponding path program 1 times [2022-12-13 17:52:52,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:52,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263126974] [2022-12-13 17:52:52,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:52,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:53,071 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:53,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:53,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263126974] [2022-12-13 17:52:53,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263126974] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:52:53,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:52:53,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:52:53,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494553626] [2022-12-13 17:52:53,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:52:53,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:52:53,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:53,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:52:53,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:52:53,074 INFO L87 Difference]: Start difference. First operand 3397 states and 5040 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 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 17:52:53,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:52:53,714 INFO L93 Difference]: Finished difference Result 10089 states and 14975 transitions. [2022-12-13 17:52:53,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:52:53,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 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 161 [2022-12-13 17:52:53,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:52:53,731 INFO L225 Difference]: With dead ends: 10089 [2022-12-13 17:52:53,731 INFO L226 Difference]: Without dead ends: 6694 [2022-12-13 17:52:53,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 17:52:53,734 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 242 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 17:52:53,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 151 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 17:52:53,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6694 states. [2022-12-13 17:52:53,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6694 to 6687. [2022-12-13 17:52:53,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6687 states, 6686 states have (on average 1.4131020041878553) internal successors, (9448), 6686 states have internal predecessors, (9448), 0 states have call successors, (0), 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 17:52:53,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6687 states to 6687 states and 9448 transitions. [2022-12-13 17:52:53,816 INFO L78 Accepts]: Start accepts. Automaton has 6687 states and 9448 transitions. Word has length 161 [2022-12-13 17:52:53,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:52:53,816 INFO L495 AbstractCegarLoop]: Abstraction has 6687 states and 9448 transitions. [2022-12-13 17:52:53,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 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 17:52:53,817 INFO L276 IsEmpty]: Start isEmpty. Operand 6687 states and 9448 transitions. [2022-12-13 17:52:53,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-12-13 17:52:53,822 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:52:53,822 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:53,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 17:52:53,822 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:52:53,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:53,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1080734270, now seen corresponding path program 1 times [2022-12-13 17:52:53,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:53,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999816741] [2022-12-13 17:52:53,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:53,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 17:52:54,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:54,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999816741] [2022-12-13 17:52:54,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999816741] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:52:54,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:52:54,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:52:54,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820796334] [2022-12-13 17:52:54,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:52:54,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:52:54,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:54,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:52:54,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:52:54,014 INFO L87 Difference]: Start difference. First operand 6687 states and 9448 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 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 17:52:54,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:52:54,677 INFO L93 Difference]: Finished difference Result 19868 states and 28068 transitions. [2022-12-13 17:52:54,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:52:54,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 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 164 [2022-12-13 17:52:54,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:52:54,701 INFO L225 Difference]: With dead ends: 19868 [2022-12-13 17:52:54,701 INFO L226 Difference]: Without dead ends: 13183 [2022-12-13 17:52:54,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 17:52:54,709 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 206 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 17:52:54,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 194 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 17:52:54,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13183 states. [2022-12-13 17:52:54,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13183 to 13183. [2022-12-13 17:52:54,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13183 states, 13182 states have (on average 1.2726445152480654) internal successors, (16776), 13182 states have internal predecessors, (16776), 0 states have call successors, (0), 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 17:52:54,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13183 states to 13183 states and 16776 transitions. [2022-12-13 17:52:54,878 INFO L78 Accepts]: Start accepts. Automaton has 13183 states and 16776 transitions. Word has length 164 [2022-12-13 17:52:54,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:52:54,878 INFO L495 AbstractCegarLoop]: Abstraction has 13183 states and 16776 transitions. [2022-12-13 17:52:54,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 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 17:52:54,878 INFO L276 IsEmpty]: Start isEmpty. Operand 13183 states and 16776 transitions. [2022-12-13 17:52:54,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-13 17:52:54,887 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:52:54,887 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:54,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 17:52:54,887 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:52:54,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:54,888 INFO L85 PathProgramCache]: Analyzing trace with hash 2099805709, now seen corresponding path program 1 times [2022-12-13 17:52:54,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:54,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614773375] [2022-12-13 17:52:54,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:54,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:54,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 17:52:55,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:55,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614773375] [2022-12-13 17:52:55,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614773375] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:52:55,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:52:55,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:52:55,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466585702] [2022-12-13 17:52:55,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:52:55,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:52:55,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:55,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:52:55,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:52:55,079 INFO L87 Difference]: Start difference. First operand 13183 states and 16776 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 17:52:55,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:52:55,772 INFO L93 Difference]: Finished difference Result 33713 states and 43627 transitions. [2022-12-13 17:52:55,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:52:55,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 168 [2022-12-13 17:52:55,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:52:55,797 INFO L225 Difference]: With dead ends: 33713 [2022-12-13 17:52:55,797 INFO L226 Difference]: Without dead ends: 20532 [2022-12-13 17:52:55,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:52:55,806 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 217 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 17:52:55,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 378 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 17:52:55,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20532 states. [2022-12-13 17:52:55,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20532 to 20522. [2022-12-13 17:52:55,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20522 states, 20521 states have (on average 1.2410701232883388) internal successors, (25468), 20521 states have internal predecessors, (25468), 0 states have call successors, (0), 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 17:52:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20522 states to 20522 states and 25468 transitions. [2022-12-13 17:52:56,023 INFO L78 Accepts]: Start accepts. Automaton has 20522 states and 25468 transitions. Word has length 168 [2022-12-13 17:52:56,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:52:56,023 INFO L495 AbstractCegarLoop]: Abstraction has 20522 states and 25468 transitions. [2022-12-13 17:52:56,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 17:52:56,023 INFO L276 IsEmpty]: Start isEmpty. Operand 20522 states and 25468 transitions. [2022-12-13 17:52:56,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-12-13 17:52:56,042 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:52:56,042 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:56,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 17:52:56,043 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:52:56,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:56,043 INFO L85 PathProgramCache]: Analyzing trace with hash 2077006845, now seen corresponding path program 1 times [2022-12-13 17:52:56,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:56,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623385859] [2022-12-13 17:52:56,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:56,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:56,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:56,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623385859] [2022-12-13 17:52:56,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623385859] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:52:56,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:52:56,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:52:56,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135841951] [2022-12-13 17:52:56,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:52:56,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:52:56,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:56,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:52:56,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:52:56,313 INFO L87 Difference]: Start difference. First operand 20522 states and 25468 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 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 17:52:57,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:52:57,042 INFO L93 Difference]: Finished difference Result 50471 states and 62495 transitions. [2022-12-13 17:52:57,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:52:57,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 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 175 [2022-12-13 17:52:57,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:52:57,073 INFO L225 Difference]: With dead ends: 50471 [2022-12-13 17:52:57,074 INFO L226 Difference]: Without dead ends: 29951 [2022-12-13 17:52:57,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 17:52:57,086 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 217 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 17:52:57,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 139 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 17:52:57,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29951 states. [2022-12-13 17:52:57,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29951 to 29926. [2022-12-13 17:52:57,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29926 states, 29925 states have (on average 1.2328153717627401) internal successors, (36892), 29925 states have internal predecessors, (36892), 0 states have call successors, (0), 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 17:52:57,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29926 states to 29926 states and 36892 transitions. [2022-12-13 17:52:57,362 INFO L78 Accepts]: Start accepts. Automaton has 29926 states and 36892 transitions. Word has length 175 [2022-12-13 17:52:57,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:52:57,362 INFO L495 AbstractCegarLoop]: Abstraction has 29926 states and 36892 transitions. [2022-12-13 17:52:57,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 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 17:52:57,362 INFO L276 IsEmpty]: Start isEmpty. Operand 29926 states and 36892 transitions. [2022-12-13 17:52:57,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-12-13 17:52:57,372 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:52:57,372 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:57,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 17:52:57,373 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:52:57,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:57,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1608446206, now seen corresponding path program 1 times [2022-12-13 17:52:57,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:57,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441716827] [2022-12-13 17:52:57,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:57,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:57,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:57,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441716827] [2022-12-13 17:52:57,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441716827] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:52:57,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:52:57,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:52:57,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502061881] [2022-12-13 17:52:57,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:52:57,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:52:57,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:57,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:52:57,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:52:57,608 INFO L87 Difference]: Start difference. First operand 29926 states and 36892 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 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 17:52:58,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:52:58,421 INFO L93 Difference]: Finished difference Result 72375 states and 90451 transitions. [2022-12-13 17:52:58,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:52:58,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 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 177 [2022-12-13 17:52:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:52:58,471 INFO L225 Difference]: With dead ends: 72375 [2022-12-13 17:52:58,471 INFO L226 Difference]: Without dead ends: 42451 [2022-12-13 17:52:58,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 17:52:58,486 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 211 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 17:52:58,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 241 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 17:52:58,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42451 states. [2022-12-13 17:52:58,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42451 to 42370. [2022-12-13 17:52:58,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42370 states, 42369 states have (on average 1.2558002313011871) internal successors, (53207), 42369 states have internal predecessors, (53207), 0 states have call successors, (0), 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 17:52:58,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42370 states to 42370 states and 53207 transitions. [2022-12-13 17:52:58,861 INFO L78 Accepts]: Start accepts. Automaton has 42370 states and 53207 transitions. Word has length 177 [2022-12-13 17:52:58,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:52:58,861 INFO L495 AbstractCegarLoop]: Abstraction has 42370 states and 53207 transitions. [2022-12-13 17:52:58,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 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 17:52:58,861 INFO L276 IsEmpty]: Start isEmpty. Operand 42370 states and 53207 transitions. [2022-12-13 17:52:58,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-12-13 17:52:58,872 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:52:58,872 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:52:58,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 17:52:58,873 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:52:58,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:58,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1903788300, now seen corresponding path program 1 times [2022-12-13 17:52:58,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:58,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060517380] [2022-12-13 17:52:58,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:58,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:58,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:59,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:59,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060517380] [2022-12-13 17:52:59,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060517380] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:52:59,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:52:59,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:52:59,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321730705] [2022-12-13 17:52:59,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:52:59,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:52:59,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:59,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:52:59,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:52:59,160 INFO L87 Difference]: Start difference. First operand 42370 states and 53207 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 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 17:52:59,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:52:59,997 INFO L93 Difference]: Finished difference Result 103360 states and 130038 transitions. [2022-12-13 17:52:59,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:52:59,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 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 181 [2022-12-13 17:52:59,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:53:00,057 INFO L225 Difference]: With dead ends: 103360 [2022-12-13 17:53:00,057 INFO L226 Difference]: Without dead ends: 61804 [2022-12-13 17:53:00,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 17:53:00,080 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 243 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 17:53:00,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 225 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 17:53:00,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61804 states. [2022-12-13 17:53:00,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61804 to 61780. [2022-12-13 17:53:00,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61780 states, 61779 states have (on average 1.2561550041276162) internal successors, (77604), 61779 states have internal predecessors, (77604), 0 states have call successors, (0), 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 17:53:00,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61780 states to 61780 states and 77604 transitions. [2022-12-13 17:53:00,727 INFO L78 Accepts]: Start accepts. Automaton has 61780 states and 77604 transitions. Word has length 181 [2022-12-13 17:53:00,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:53:00,727 INFO L495 AbstractCegarLoop]: Abstraction has 61780 states and 77604 transitions. [2022-12-13 17:53:00,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 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 17:53:00,727 INFO L276 IsEmpty]: Start isEmpty. Operand 61780 states and 77604 transitions. [2022-12-13 17:53:00,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-12-13 17:53:00,747 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:53:00,748 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:53:00,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 17:53:00,748 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:53:00,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:00,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1538858248, now seen corresponding path program 1 times [2022-12-13 17:53:00,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:53:00,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947688451] [2022-12-13 17:53:00,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:00,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:53:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 17:53:00,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:53:00,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947688451] [2022-12-13 17:53:00,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947688451] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:53:00,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:53:00,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:53:00,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647400995] [2022-12-13 17:53:00,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:53:00,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:53:00,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:53:00,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:53:00,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:53:00,934 INFO L87 Difference]: Start difference. First operand 61780 states and 77604 transitions. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 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 17:53:02,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:53:02,433 INFO L93 Difference]: Finished difference Result 164867 states and 207696 transitions. [2022-12-13 17:53:02,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:53:02,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 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 192 [2022-12-13 17:53:02,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:53:02,635 INFO L225 Difference]: With dead ends: 164867 [2022-12-13 17:53:02,635 INFO L226 Difference]: Without dead ends: 103901 [2022-12-13 17:53:02,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:53:02,655 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 520 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:53:02,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 533 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 17:53:02,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103901 states. [2022-12-13 17:53:03,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103901 to 103858. [2022-12-13 17:53:03,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103858 states, 103857 states have (on average 1.2354583706442512) internal successors, (128311), 103857 states have internal predecessors, (128311), 0 states have call successors, (0), 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 17:53:03,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103858 states to 103858 states and 128311 transitions. [2022-12-13 17:53:03,662 INFO L78 Accepts]: Start accepts. Automaton has 103858 states and 128311 transitions. Word has length 192 [2022-12-13 17:53:03,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:53:03,663 INFO L495 AbstractCegarLoop]: Abstraction has 103858 states and 128311 transitions. [2022-12-13 17:53:03,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 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 17:53:03,663 INFO L276 IsEmpty]: Start isEmpty. Operand 103858 states and 128311 transitions. [2022-12-13 17:53:03,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-12-13 17:53:03,681 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:53:03,681 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:53:03,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 17:53:03,682 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:53:03,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:03,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1860977861, now seen corresponding path program 1 times [2022-12-13 17:53:03,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:53:03,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522423914] [2022-12-13 17:53:03,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:03,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:53:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 17:53:04,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:53:04,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522423914] [2022-12-13 17:53:04,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522423914] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:53:04,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100125995] [2022-12-13 17:53:04,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:04,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:04,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:53:04,002 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:53:04,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:53:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:04,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 17:53:04,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:53:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 17:53:04,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:53:04,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100125995] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:53:04,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:53:04,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 17:53:04,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830799392] [2022-12-13 17:53:04,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:53:04,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:53:04,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:53:04,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:53:04,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:53:04,342 INFO L87 Difference]: Start difference. First operand 103858 states and 128311 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 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 17:53:05,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:53:05,572 INFO L93 Difference]: Finished difference Result 203456 states and 254569 transitions. [2022-12-13 17:53:05,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:53:05,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 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 195 [2022-12-13 17:53:05,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:53:05,690 INFO L225 Difference]: With dead ends: 203456 [2022-12-13 17:53:05,690 INFO L226 Difference]: Without dead ends: 100412 [2022-12-13 17:53:05,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:53:05,747 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 90 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 17:53:05,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 406 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 17:53:05,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100412 states. [2022-12-13 17:53:06,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100412 to 100192. [2022-12-13 17:53:06,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100192 states, 100191 states have (on average 1.1668213711810442) internal successors, (116905), 100191 states have internal predecessors, (116905), 0 states have call successors, (0), 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 17:53:06,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100192 states to 100192 states and 116905 transitions. [2022-12-13 17:53:06,951 INFO L78 Accepts]: Start accepts. Automaton has 100192 states and 116905 transitions. Word has length 195 [2022-12-13 17:53:06,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:53:06,951 INFO L495 AbstractCegarLoop]: Abstraction has 100192 states and 116905 transitions. [2022-12-13 17:53:06,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 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 17:53:06,952 INFO L276 IsEmpty]: Start isEmpty. Operand 100192 states and 116905 transitions. [2022-12-13 17:53:06,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-12-13 17:53:06,970 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:53:06,971 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:53:06,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:53:07,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 17:53:07,173 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:53:07,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:07,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1670326217, now seen corresponding path program 1 times [2022-12-13 17:53:07,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:53:07,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259571646] [2022-12-13 17:53:07,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:07,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:53:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-13 17:53:07,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:53:07,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259571646] [2022-12-13 17:53:07,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259571646] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:53:07,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427568644] [2022-12-13 17:53:07,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:07,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:07,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:53:07,551 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:53:07,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:53:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:07,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 17:53:07,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:53:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 17:53:07,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:53:07,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427568644] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:53:07,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:53:07,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 17:53:07,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562380124] [2022-12-13 17:53:07,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:53:07,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:53:07,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:53:07,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:53:07,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:53:07,751 INFO L87 Difference]: Start difference. First operand 100192 states and 116905 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 17:53:08,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:53:08,694 INFO L93 Difference]: Finished difference Result 231144 states and 270978 transitions. [2022-12-13 17:53:08,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:53:08,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 218 [2022-12-13 17:53:08,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:53:08,876 INFO L225 Difference]: With dead ends: 231144 [2022-12-13 17:53:08,876 INFO L226 Difference]: Without dead ends: 157656 [2022-12-13 17:53:08,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:53:08,929 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 312 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 17:53:08,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 892 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 17:53:09,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157656 states. [2022-12-13 17:53:10,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157656 to 154201. [2022-12-13 17:53:10,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154201 states, 154200 states have (on average 1.1610505836575875) internal successors, (179034), 154200 states have internal predecessors, (179034), 0 states have call successors, (0), 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 17:53:10,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154201 states to 154201 states and 179034 transitions. [2022-12-13 17:53:10,611 INFO L78 Accepts]: Start accepts. Automaton has 154201 states and 179034 transitions. Word has length 218 [2022-12-13 17:53:10,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:53:10,611 INFO L495 AbstractCegarLoop]: Abstraction has 154201 states and 179034 transitions. [2022-12-13 17:53:10,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 17:53:10,611 INFO L276 IsEmpty]: Start isEmpty. Operand 154201 states and 179034 transitions. [2022-12-13 17:53:10,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-12-13 17:53:10,640 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:53:10,640 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:53:10,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 17:53:10,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 17:53:10,842 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:53:10,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:10,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1405678727, now seen corresponding path program 1 times [2022-12-13 17:53:10,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:53:10,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435076188] [2022-12-13 17:53:10,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:10,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:53:10,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-13 17:53:11,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:53:11,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435076188] [2022-12-13 17:53:11,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435076188] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:53:11,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749124745] [2022-12-13 17:53:11,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:11,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:11,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:53:11,220 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:53:11,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:53:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:11,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 17:53:11,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:53:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-12-13 17:53:11,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:53:11,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749124745] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:53:11,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:53:11,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 17:53:11,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313935969] [2022-12-13 17:53:11,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:53:11,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:53:11,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:53:11,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:53:11,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:53:11,502 INFO L87 Difference]: Start difference. First operand 154201 states and 179034 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 17:53:13,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:53:13,032 INFO L93 Difference]: Finished difference Result 333595 states and 388883 transitions. [2022-12-13 17:53:13,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:53:13,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 218 [2022-12-13 17:53:13,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:53:13,248 INFO L225 Difference]: With dead ends: 333595 [2022-12-13 17:53:13,249 INFO L226 Difference]: Without dead ends: 179802 [2022-12-13 17:53:13,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:53:13,334 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 90 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 17:53:13,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 363 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 17:53:13,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179802 states. [2022-12-13 17:53:15,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179802 to 179598. [2022-12-13 17:53:15,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179598 states, 179597 states have (on average 1.1587777078681716) internal successors, (208113), 179597 states have internal predecessors, (208113), 0 states have call successors, (0), 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 17:53:15,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179598 states to 179598 states and 208113 transitions. [2022-12-13 17:53:15,564 INFO L78 Accepts]: Start accepts. Automaton has 179598 states and 208113 transitions. Word has length 218 [2022-12-13 17:53:15,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:53:15,564 INFO L495 AbstractCegarLoop]: Abstraction has 179598 states and 208113 transitions. [2022-12-13 17:53:15,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 17:53:15,564 INFO L276 IsEmpty]: Start isEmpty. Operand 179598 states and 208113 transitions. [2022-12-13 17:53:15,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-12-13 17:53:15,602 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:53:15,602 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:53:15,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 17:53:15,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 17:53:15,804 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:53:15,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:15,806 INFO L85 PathProgramCache]: Analyzing trace with hash -194732802, now seen corresponding path program 1 times [2022-12-13 17:53:15,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:53:15,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670812789] [2022-12-13 17:53:15,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:15,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:53:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:53:16,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:53:16,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670812789] [2022-12-13 17:53:16,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670812789] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:53:16,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:53:16,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:53:16,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154109082] [2022-12-13 17:53:16,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:53:16,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:53:16,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:53:16,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:53:16,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:53:16,187 INFO L87 Difference]: Start difference. First operand 179598 states and 208113 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 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 17:53:17,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:53:17,524 INFO L93 Difference]: Finished difference Result 358891 states and 417485 transitions. [2022-12-13 17:53:17,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:53:17,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 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 222 [2022-12-13 17:53:17,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:53:17,779 INFO L225 Difference]: With dead ends: 358891 [2022-12-13 17:53:17,779 INFO L226 Difference]: Without dead ends: 209454 [2022-12-13 17:53:17,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 17:53:17,854 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 171 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 17:53:17,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 226 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 17:53:18,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209454 states. [2022-12-13 17:53:20,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209454 to 201589. [2022-12-13 17:53:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201589 states, 201588 states have (on average 1.1675546163462112) internal successors, (235365), 201588 states have internal predecessors, (235365), 0 states have call successors, (0), 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 17:53:20,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201589 states to 201589 states and 235365 transitions. [2022-12-13 17:53:20,588 INFO L78 Accepts]: Start accepts. Automaton has 201589 states and 235365 transitions. Word has length 222 [2022-12-13 17:53:20,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:53:20,589 INFO L495 AbstractCegarLoop]: Abstraction has 201589 states and 235365 transitions. [2022-12-13 17:53:20,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 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 17:53:20,589 INFO L276 IsEmpty]: Start isEmpty. Operand 201589 states and 235365 transitions. [2022-12-13 17:53:20,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-12-13 17:53:20,617 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:53:20,618 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:53:20,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 17:53:20,618 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:53:20,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:20,618 INFO L85 PathProgramCache]: Analyzing trace with hash -227102397, now seen corresponding path program 1 times [2022-12-13 17:53:20,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:53:20,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265546002] [2022-12-13 17:53:20,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:20,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:53:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 92 proven. 6 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-13 17:53:20,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:53:20,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265546002] [2022-12-13 17:53:20,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265546002] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:53:20,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607823392] [2022-12-13 17:53:20,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:20,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:20,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:53:20,845 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:53:20,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 17:53:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:20,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 17:53:20,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:53:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-13 17:53:21,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:53:21,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607823392] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:53:21,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:53:21,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 17:53:21,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090564783] [2022-12-13 17:53:21,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:53:21,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:53:21,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:53:21,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:53:21,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:53:21,080 INFO L87 Difference]: Start difference. First operand 201589 states and 235365 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 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 17:53:23,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:53:23,055 INFO L93 Difference]: Finished difference Result 529859 states and 619149 transitions. [2022-12-13 17:53:23,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:53:23,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 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 238 [2022-12-13 17:53:23,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:53:23,551 INFO L225 Difference]: With dead ends: 529859 [2022-12-13 17:53:23,551 INFO L226 Difference]: Without dead ends: 330306 [2022-12-13 17:53:23,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:53:23,636 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 117 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 17:53:23,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 196 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 17:53:23,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330306 states. [2022-12-13 17:53:26,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330306 to 312630. [2022-12-13 17:53:27,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312630 states, 312629 states have (on average 1.157023180830953) internal successors, (361719), 312629 states have internal predecessors, (361719), 0 states have call successors, (0), 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 17:53:27,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312630 states to 312630 states and 361719 transitions. [2022-12-13 17:53:27,373 INFO L78 Accepts]: Start accepts. Automaton has 312630 states and 361719 transitions. Word has length 238 [2022-12-13 17:53:27,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:53:27,373 INFO L495 AbstractCegarLoop]: Abstraction has 312630 states and 361719 transitions. [2022-12-13 17:53:27,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 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 17:53:27,374 INFO L276 IsEmpty]: Start isEmpty. Operand 312630 states and 361719 transitions. [2022-12-13 17:53:27,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-12-13 17:53:27,419 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:53:27,420 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:53:27,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 17:53:27,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 17:53:27,622 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:53:27,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:27,623 INFO L85 PathProgramCache]: Analyzing trace with hash -2109704336, now seen corresponding path program 1 times [2022-12-13 17:53:27,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:53:27,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28242981] [2022-12-13 17:53:27,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:27,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:53:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 117 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-12-13 17:53:28,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:53:28,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28242981] [2022-12-13 17:53:28,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28242981] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:53:28,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810526322] [2022-12-13 17:53:28,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:28,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:28,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:53:28,036 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:53:28,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 17:53:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:28,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 17:53:28,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:53:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-12-13 17:53:28,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:53:28,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810526322] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:53:28,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:53:28,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 17:53:28,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766720320] [2022-12-13 17:53:28,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:53:28,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:53:28,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:53:28,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:53:28,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:53:28,367 INFO L87 Difference]: Start difference. First operand 312630 states and 361719 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 17:53:30,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:53:30,639 INFO L93 Difference]: Finished difference Result 707765 states and 826015 transitions. [2022-12-13 17:53:30,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:53:30,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 252 [2022-12-13 17:53:30,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:53:31,238 INFO L225 Difference]: With dead ends: 707765 [2022-12-13 17:53:31,239 INFO L226 Difference]: Without dead ends: 396561 [2022-12-13 17:53:31,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:53:31,371 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 123 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 17:53:31,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 161 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 17:53:31,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396561 states. [2022-12-13 17:53:35,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396561 to 388949. [2022-12-13 17:53:35,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388949 states, 388948 states have (on average 1.1597128665014347) internal successors, (451068), 388948 states have internal predecessors, (451068), 0 states have call successors, (0), 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 17:53:36,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388949 states to 388949 states and 451068 transitions. [2022-12-13 17:53:36,044 INFO L78 Accepts]: Start accepts. Automaton has 388949 states and 451068 transitions. Word has length 252 [2022-12-13 17:53:36,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:53:36,045 INFO L495 AbstractCegarLoop]: Abstraction has 388949 states and 451068 transitions. [2022-12-13 17:53:36,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 17:53:36,045 INFO L276 IsEmpty]: Start isEmpty. Operand 388949 states and 451068 transitions. [2022-12-13 17:53:36,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-12-13 17:53:36,088 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:53:36,089 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:53:36,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 17:53:36,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:36,291 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:53:36,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:36,292 INFO L85 PathProgramCache]: Analyzing trace with hash 45861599, now seen corresponding path program 1 times [2022-12-13 17:53:36,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:53:36,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031435235] [2022-12-13 17:53:36,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:36,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:53:36,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 98 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-13 17:53:36,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:53:36,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031435235] [2022-12-13 17:53:36,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031435235] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:53:36,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11728775] [2022-12-13 17:53:36,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:36,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:36,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:53:36,752 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:53:36,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 17:53:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:36,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 17:53:36,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:53:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-13 17:53:37,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:53:37,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11728775] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:53:37,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:53:37,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 17:53:37,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332406246] [2022-12-13 17:53:37,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:53:37,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:53:37,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:53:37,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:53:37,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:53:37,019 INFO L87 Difference]: Start difference. First operand 388949 states and 451068 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 17:53:39,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:53:39,741 INFO L93 Difference]: Finished difference Result 800145 states and 931515 transitions. [2022-12-13 17:53:39,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:53:39,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 259 [2022-12-13 17:53:39,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:53:40,345 INFO L225 Difference]: With dead ends: 800145 [2022-12-13 17:53:40,345 INFO L226 Difference]: Without dead ends: 413231 [2022-12-13 17:53:40,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:53:40,510 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 124 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 17:53:40,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 342 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 17:53:40,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413231 states. [2022-12-13 17:53:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413231 to 400811. [2022-12-13 17:53:45,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400811 states, 400810 states have (on average 1.15081210548639) internal successors, (461257), 400810 states have internal predecessors, (461257), 0 states have call successors, (0), 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 17:53:45,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400811 states to 400811 states and 461257 transitions. [2022-12-13 17:53:45,801 INFO L78 Accepts]: Start accepts. Automaton has 400811 states and 461257 transitions. Word has length 259 [2022-12-13 17:53:45,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:53:45,802 INFO L495 AbstractCegarLoop]: Abstraction has 400811 states and 461257 transitions. [2022-12-13 17:53:45,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 17:53:45,802 INFO L276 IsEmpty]: Start isEmpty. Operand 400811 states and 461257 transitions. [2022-12-13 17:53:45,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-12-13 17:53:45,917 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:53:45,917 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:53:45,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 17:53:46,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 17:53:46,120 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:53:46,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:46,121 INFO L85 PathProgramCache]: Analyzing trace with hash -556467373, now seen corresponding path program 1 times [2022-12-13 17:53:46,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:53:46,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074147305] [2022-12-13 17:53:46,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:46,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:53:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-12-13 17:53:46,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:53:46,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074147305] [2022-12-13 17:53:46,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074147305] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:53:46,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480440543] [2022-12-13 17:53:46,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:46,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:46,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:53:46,490 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:53:46,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 17:53:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:46,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 17:53:46,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:53:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-13 17:53:46,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:53:46,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480440543] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:53:46,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:53:46,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-12-13 17:53:46,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336266554] [2022-12-13 17:53:46,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:53:46,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:53:46,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:53:46,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:53:46,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:53:46,981 INFO L87 Difference]: Start difference. First operand 400811 states and 461257 transitions. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 2 states have internal predecessors, (289), 0 states have call successors, (0), 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 17:53:48,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:53:48,874 INFO L93 Difference]: Finished difference Result 693665 states and 798487 transitions. [2022-12-13 17:53:48,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:53:48,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 2 states have internal predecessors, (289), 0 states have call successors, (0), 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 355 [2022-12-13 17:53:48,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:53:49,359 INFO L225 Difference]: With dead ends: 693665 [2022-12-13 17:53:49,359 INFO L226 Difference]: Without dead ends: 306281 [2022-12-13 17:53:49,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:53:49,468 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 201 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 17:53:49,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 17:53:49,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306281 states. [2022-12-13 17:53:52,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306281 to 302824. [2022-12-13 17:53:52,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302824 states, 302823 states have (on average 1.1432453941741545) internal successors, (346201), 302823 states have internal predecessors, (346201), 0 states have call successors, (0), 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 17:53:53,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302824 states to 302824 states and 346201 transitions. [2022-12-13 17:53:53,162 INFO L78 Accepts]: Start accepts. Automaton has 302824 states and 346201 transitions. Word has length 355 [2022-12-13 17:53:53,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:53:53,162 INFO L495 AbstractCegarLoop]: Abstraction has 302824 states and 346201 transitions. [2022-12-13 17:53:53,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 2 states have internal predecessors, (289), 0 states have call successors, (0), 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 17:53:53,162 INFO L276 IsEmpty]: Start isEmpty. Operand 302824 states and 346201 transitions. [2022-12-13 17:53:53,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2022-12-13 17:53:53,258 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:53:53,259 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:53:53,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 17:53:53,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:53,461 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:53:53,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:53,462 INFO L85 PathProgramCache]: Analyzing trace with hash 265793029, now seen corresponding path program 1 times [2022-12-13 17:53:53,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:53:53,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996933253] [2022-12-13 17:53:53,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:53,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:53:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 290 proven. 95 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-13 17:53:55,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:53:55,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996933253] [2022-12-13 17:53:55,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996933253] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:53:55,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616640742] [2022-12-13 17:53:55,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:55,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:55,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:53:55,139 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:53:55,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 17:53:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:55,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 17:53:55,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:53:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 385 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-13 17:53:55,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:53:55,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616640742] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:53:55,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:53:55,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-12-13 17:53:55,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480303735] [2022-12-13 17:53:55,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:53:55,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:53:55,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:53:55,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:53:55,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:53:55,498 INFO L87 Difference]: Start difference. First operand 302824 states and 346201 transitions. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:57,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:53:57,005 INFO L93 Difference]: Finished difference Result 506061 states and 576702 transitions. [2022-12-13 17:53:57,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:53:57,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 407 [2022-12-13 17:53:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:53:57,262 INFO L225 Difference]: With dead ends: 506061 [2022-12-13 17:53:57,263 INFO L226 Difference]: Without dead ends: 216055 [2022-12-13 17:53:57,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:53:57,367 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 128 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 17:53:57,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 321 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 17:53:57,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216055 states. [2022-12-13 17:53:59,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216055 to 211583. [2022-12-13 17:53:59,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211583 states, 211582 states have (on average 1.1161535480333866) internal successors, (236158), 211582 states have internal predecessors, (236158), 0 states have call successors, (0), 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 17:53:59,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211583 states to 211583 states and 236158 transitions. [2022-12-13 17:53:59,803 INFO L78 Accepts]: Start accepts. Automaton has 211583 states and 236158 transitions. Word has length 407 [2022-12-13 17:53:59,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:53:59,803 INFO L495 AbstractCegarLoop]: Abstraction has 211583 states and 236158 transitions. [2022-12-13 17:53:59,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:59,803 INFO L276 IsEmpty]: Start isEmpty. Operand 211583 states and 236158 transitions. [2022-12-13 17:53:59,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2022-12-13 17:53:59,878 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:53:59,878 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:53:59,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-13 17:54:00,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:54:00,080 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:54:00,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:00,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1789766806, now seen corresponding path program 1 times [2022-12-13 17:54:00,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:00,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45374250] [2022-12-13 17:54:00,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:00,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 441 proven. 12 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-12-13 17:54:00,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:00,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45374250] [2022-12-13 17:54:00,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45374250] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:54:00,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039900365] [2022-12-13 17:54:00,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:00,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:54:00,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:54:00,752 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:54:00,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 17:54:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:01,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 17:54:01,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:54:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 348 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-12-13 17:54:01,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:54:01,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039900365] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:01,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:54:01,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-13 17:54:01,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016309564] [2022-12-13 17:54:01,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:01,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:54:01,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:01,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:54:01,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:54:01,229 INFO L87 Difference]: Start difference. First operand 211583 states and 236158 transitions. Second operand has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 2 states have internal predecessors, (277), 0 states have call successors, (0), 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 17:54:02,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:54:02,702 INFO L93 Difference]: Finished difference Result 548433 states and 611454 transitions. [2022-12-13 17:54:02,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:54:02,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 2 states have internal predecessors, (277), 0 states have call successors, (0), 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 430 [2022-12-13 17:54:02,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:54:03,082 INFO L225 Difference]: With dead ends: 548433 [2022-12-13 17:54:03,082 INFO L226 Difference]: Without dead ends: 338276 [2022-12-13 17:54:03,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:54:03,177 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 198 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:54:03,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 531 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:54:03,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338276 states. [2022-12-13 17:54:06,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338276 to 294510. [2022-12-13 17:54:06,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294510 states, 294509 states have (on average 1.1116027014454566) internal successors, (327377), 294509 states have internal predecessors, (327377), 0 states have call successors, (0), 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 17:54:07,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294510 states to 294510 states and 327377 transitions. [2022-12-13 17:54:07,110 INFO L78 Accepts]: Start accepts. Automaton has 294510 states and 327377 transitions. Word has length 430 [2022-12-13 17:54:07,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:54:07,110 INFO L495 AbstractCegarLoop]: Abstraction has 294510 states and 327377 transitions. [2022-12-13 17:54:07,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 2 states have internal predecessors, (277), 0 states have call successors, (0), 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 17:54:07,111 INFO L276 IsEmpty]: Start isEmpty. Operand 294510 states and 327377 transitions. [2022-12-13 17:54:07,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2022-12-13 17:54:07,229 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:54:07,229 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 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 17:54:07,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 17:54:07,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 17:54:07,431 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:54:07,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:07,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1260884401, now seen corresponding path program 1 times [2022-12-13 17:54:07,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:07,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13591173] [2022-12-13 17:54:07,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:07,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 570 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-13 17:54:07,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:07,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13591173] [2022-12-13 17:54:07,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13591173] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:07,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:07,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:54:07,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559801392] [2022-12-13 17:54:07,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:07,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:54:07,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:07,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:54:07,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:54:07,823 INFO L87 Difference]: Start difference. First operand 294510 states and 327377 transitions. Second operand has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 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 17:54:10,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:54:10,191 INFO L93 Difference]: Finished difference Result 599402 states and 667693 transitions. [2022-12-13 17:54:10,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:54:10,191 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 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 468 [2022-12-13 17:54:10,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:54:10,497 INFO L225 Difference]: With dead ends: 599402 [2022-12-13 17:54:10,497 INFO L226 Difference]: Without dead ends: 285815 [2022-12-13 17:54:10,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:54:10,586 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 320 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:54:10,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 104 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 17:54:10,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285815 states. [2022-12-13 17:54:13,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285815 to 225534. [2022-12-13 17:54:13,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225534 states, 225533 states have (on average 1.08488779912474) internal successors, (244678), 225533 states have internal predecessors, (244678), 0 states have call successors, (0), 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 17:54:13,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225534 states to 225534 states and 244678 transitions. [2022-12-13 17:54:13,885 INFO L78 Accepts]: Start accepts. Automaton has 225534 states and 244678 transitions. Word has length 468 [2022-12-13 17:54:13,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:54:13,885 INFO L495 AbstractCegarLoop]: Abstraction has 225534 states and 244678 transitions. [2022-12-13 17:54:13,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 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 17:54:13,885 INFO L276 IsEmpty]: Start isEmpty. Operand 225534 states and 244678 transitions. [2022-12-13 17:54:13,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-12-13 17:54:13,969 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:54:13,969 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 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 17:54:13,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 17:54:13,970 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:54:13,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:13,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1190302007, now seen corresponding path program 1 times [2022-12-13 17:54:13,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:13,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66973171] [2022-12-13 17:54:13,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:13,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2022-12-13 17:54:14,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:14,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66973171] [2022-12-13 17:54:14,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66973171] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:14,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:54:14,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:54:14,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446235115] [2022-12-13 17:54:14,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:14,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:54:14,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:14,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:54:14,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:54:14,359 INFO L87 Difference]: Start difference. First operand 225534 states and 244678 transitions. Second operand has 4 states, 4 states have (on average 63.25) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 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 17:54:16,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:54:16,155 INFO L93 Difference]: Finished difference Result 433629 states and 469638 transitions. [2022-12-13 17:54:16,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:54:16,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 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 530 [2022-12-13 17:54:16,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:54:16,401 INFO L225 Difference]: With dead ends: 433629 [2022-12-13 17:54:16,401 INFO L226 Difference]: Without dead ends: 214810 [2022-12-13 17:54:16,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:54:16,612 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 358 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 17:54:16,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 124 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 17:54:16,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214810 states. [2022-12-13 17:54:18,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214810 to 205004. [2022-12-13 17:54:18,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205004 states, 205003 states have (on average 1.0802524841099885) internal successors, (221455), 205003 states have internal predecessors, (221455), 0 states have call successors, (0), 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 17:54:19,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205004 states to 205004 states and 221455 transitions. [2022-12-13 17:54:19,006 INFO L78 Accepts]: Start accepts. Automaton has 205004 states and 221455 transitions. Word has length 530 [2022-12-13 17:54:19,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:54:19,007 INFO L495 AbstractCegarLoop]: Abstraction has 205004 states and 221455 transitions. [2022-12-13 17:54:19,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 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 17:54:19,007 INFO L276 IsEmpty]: Start isEmpty. Operand 205004 states and 221455 transitions. [2022-12-13 17:54:19,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2022-12-13 17:54:19,108 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:54:19,109 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 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 17:54:19,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 17:54:19,109 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:54:19,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:19,110 INFO L85 PathProgramCache]: Analyzing trace with hash -82393486, now seen corresponding path program 1 times [2022-12-13 17:54:19,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:19,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958610876] [2022-12-13 17:54:19,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:19,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 409 proven. 6 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2022-12-13 17:54:19,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:19,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958610876] [2022-12-13 17:54:19,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958610876] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:54:19,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84673474] [2022-12-13 17:54:19,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:19,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:54:19,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:54:19,721 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:54:19,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 17:54:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:19,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 17:54:19,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:54:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 409 proven. 0 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-12-13 17:54:20,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:54:20,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84673474] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:20,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:54:20,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-12-13 17:54:20,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741840714] [2022-12-13 17:54:20,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:20,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:54:20,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:20,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:54:20,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:54:20,058 INFO L87 Difference]: Start difference. First operand 205004 states and 221455 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 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 17:54:21,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:54:21,631 INFO L93 Difference]: Finished difference Result 586763 states and 634477 transitions. [2022-12-13 17:54:21,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:54:21,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 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 552 [2022-12-13 17:54:21,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:54:22,129 INFO L225 Difference]: With dead ends: 586763 [2022-12-13 17:54:22,129 INFO L226 Difference]: Without dead ends: 383182 [2022-12-13 17:54:22,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 551 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:54:22,170 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 183 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:54:22,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 478 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:54:22,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383182 states. [2022-12-13 17:54:25,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383182 to 372615. [2022-12-13 17:54:26,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372615 states, 372614 states have (on average 1.0807967494511748) internal successors, (402720), 372614 states have internal predecessors, (402720), 0 states have call successors, (0), 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 17:54:26,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372615 states to 372615 states and 402720 transitions. [2022-12-13 17:54:26,567 INFO L78 Accepts]: Start accepts. Automaton has 372615 states and 402720 transitions. Word has length 552 [2022-12-13 17:54:26,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:54:26,567 INFO L495 AbstractCegarLoop]: Abstraction has 372615 states and 402720 transitions. [2022-12-13 17:54:26,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 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 17:54:26,568 INFO L276 IsEmpty]: Start isEmpty. Operand 372615 states and 402720 transitions. [2022-12-13 17:54:26,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2022-12-13 17:54:26,665 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:54:26,665 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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 17:54:26,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 17:54:26,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 17:54:26,867 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:54:26,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:26,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1499934558, now seen corresponding path program 1 times [2022-12-13 17:54:26,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:26,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567781735] [2022-12-13 17:54:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:26,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 185 proven. 6 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-12-13 17:54:27,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:27,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567781735] [2022-12-13 17:54:27,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567781735] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:54:27,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69806224] [2022-12-13 17:54:27,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:27,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:54:27,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:54:27,413 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:54:27,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bb5130-0516-4b6d-9317-c0f334c452d2/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 17:54:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:27,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 17:54:27,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:54:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 716 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-12-13 17:54:27,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:54:27,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69806224] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:27,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:54:27,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 17:54:27,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791772981] [2022-12-13 17:54:27,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:27,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:54:27,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:27,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:54:27,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:54:27,948 INFO L87 Difference]: Start difference. First operand 372615 states and 402720 transitions. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)