./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label46.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label46.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8cf4f28b762443394edafed0f3ab08c0ba6ed0f26d824c46d396477f011c5356 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 16:54:59,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:54:59,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:54:59,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:54:59,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:54:59,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:54:59,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:54:59,182 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:54:59,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:54:59,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:54:59,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:54:59,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:54:59,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:54:59,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:54:59,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:54:59,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:54:59,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:54:59,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:54:59,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:54:59,211 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:54:59,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:54:59,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:54:59,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:54:59,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:54:59,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:54:59,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:54:59,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:54:59,233 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:54:59,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:54:59,236 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:54:59,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:54:59,237 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:54:59,238 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:54:59,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:54:59,241 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:54:59,242 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:54:59,242 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:54:59,243 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:54:59,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:54:59,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:54:59,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:54:59,245 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:54:59,287 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:54:59,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:54:59,288 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:54:59,288 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:54:59,289 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:54:59,290 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:54:59,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:54:59,291 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:54:59,291 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:54:59,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:54:59,292 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:54:59,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:54:59,293 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:54:59,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:54:59,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:54:59,294 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:54:59,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:54:59,294 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:54:59,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:54:59,295 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:54:59,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:54:59,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:54:59,295 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:54:59,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:54:59,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:54:59,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:54:59,296 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:54:59,297 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:54:59,297 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:54:59,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:54:59,298 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:54:59,298 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:54:59,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:54:59,299 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cf4f28b762443394edafed0f3ab08c0ba6ed0f26d824c46d396477f011c5356 [2022-11-21 16:54:59,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:54:59,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:54:59,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:54:59,587 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:54:59,587 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:54:59,589 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/eca-rers2012/Problem19_label46.c [2022-11-21 16:55:02,634 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:55:03,257 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:55:03,258 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/sv-benchmarks/c/eca-rers2012/Problem19_label46.c [2022-11-21 16:55:03,306 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/data/c651cda98/cd940406165f43e5a10955258c1e3f88/FLAG52d7c44d8 [2022-11-21 16:55:03,324 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/data/c651cda98/cd940406165f43e5a10955258c1e3f88 [2022-11-21 16:55:03,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:55:03,329 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:55:03,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:55:03,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:55:03,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:55:03,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:55:03" (1/1) ... [2022-11-21 16:55:03,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cf29735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:55:03, skipping insertion in model container [2022-11-21 16:55:03,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:55:03" (1/1) ... [2022-11-21 16:55:03,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:55:03,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:55:03,846 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_f070c814-a2d9-448e-8d4f-88f894a6f907/sv-benchmarks/c/eca-rers2012/Problem19_label46.c[4445,4458] [2022-11-21 16:55:05,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:55:05,621 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:55:05,653 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_f070c814-a2d9-448e-8d4f-88f894a6f907/sv-benchmarks/c/eca-rers2012/Problem19_label46.c[4445,4458] [2022-11-21 16:55:06,869 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:55:06,903 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:55:06,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:55:06 WrapperNode [2022-11-21 16:55:06,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:55:06,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:55:06,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:55:06,905 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:55:06,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:55:06" (1/1) ... [2022-11-21 16:55:07,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:55:06" (1/1) ... [2022-11-21 16:55:08,173 INFO L138 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2022-11-21 16:55:08,173 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:55:08,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:55:08,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:55:08,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:55:08,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:55:06" (1/1) ... [2022-11-21 16:55:08,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:55:06" (1/1) ... [2022-11-21 16:55:08,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:55:06" (1/1) ... [2022-11-21 16:55:08,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:55:06" (1/1) ... [2022-11-21 16:55:08,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:55:06" (1/1) ... [2022-11-21 16:55:08,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:55:06" (1/1) ... [2022-11-21 16:55:08,959 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:55:06" (1/1) ... [2022-11-21 16:55:08,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:55:06" (1/1) ... [2022-11-21 16:55:09,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:55:09,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:55:09,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:55:09,303 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:55:09,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:55:06" (1/1) ... [2022-11-21 16:55:09,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:55:09,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:55:09,345 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:55:09,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:55:09,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:55:09,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:55:09,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:55:09,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:55:09,508 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:55:09,510 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:55:19,646 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:55:19,665 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:55:19,665 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-21 16:55:19,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:55:19 BoogieIcfgContainer [2022-11-21 16:55:19,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:55:19,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:55:19,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:55:19,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:55:19,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:55:03" (1/3) ... [2022-11-21 16:55:19,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e2bcdc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:55:19, skipping insertion in model container [2022-11-21 16:55:19,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:55:06" (2/3) ... [2022-11-21 16:55:19,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e2bcdc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:55:19, skipping insertion in model container [2022-11-21 16:55:19,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:55:19" (3/3) ... [2022-11-21 16:55:19,678 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label46.c [2022-11-21 16:55:19,697 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:55:19,697 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:55:19,775 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:55:19,781 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;@6c168355, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:55:19,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 16:55:19,791 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:55:19,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-21 16:55:19,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:55:19,799 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] [2022-11-21 16:55:19,800 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:55:19,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:55:19,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1317301102, now seen corresponding path program 1 times [2022-11-21 16:55:19,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:55:19,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163795541] [2022-11-21 16:55:19,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:55:19,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:55:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:55:20,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:55:20,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163795541] [2022-11-21 16:55:20,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163795541] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:55:20,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:55:20,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:55:20,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55389393] [2022-11-21 16:55:20,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:55:20,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:55:20,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:55:20,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:55:20,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:55:20,207 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 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 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:55:30,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:55:30,333 INFO L93 Difference]: Finished difference Result 4957 states and 9398 transitions. [2022-11-21 16:55:30,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:55:30,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-21 16:55:30,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:55:30,366 INFO L225 Difference]: With dead ends: 4957 [2022-11-21 16:55:30,367 INFO L226 Difference]: Without dead ends: 3129 [2022-11-21 16:55:30,376 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 [2022-11-21 16:55:30,380 INFO L413 NwaCegarLoop]: 1373 mSDtfsCounter, 1594 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 4344 mSolverCounterSat, 1517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1594 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 5861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1517 IncrementalHoareTripleChecker+Valid, 4344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:55:30,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1594 Valid, 1595 Invalid, 5861 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1517 Valid, 4344 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2022-11-21 16:55:30,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2022-11-21 16:55:30,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3108. [2022-11-21 16:55:30,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 1.6012230447376892) internal successors, (4975), 3107 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:55:30,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4975 transitions. [2022-11-21 16:55:30,548 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4975 transitions. Word has length 32 [2022-11-21 16:55:30,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:55:30,550 INFO L495 AbstractCegarLoop]: Abstraction has 3108 states and 4975 transitions. [2022-11-21 16:55:30,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:55:30,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4975 transitions. [2022-11-21 16:55:30,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-21 16:55:30,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:55:30,554 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] [2022-11-21 16:55:30,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:55:30,555 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:55:30,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:55:30,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1370589736, now seen corresponding path program 1 times [2022-11-21 16:55:30,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:55:30,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949598666] [2022-11-21 16:55:30,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:55:30,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:55:30,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:55:31,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:55:31,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949598666] [2022-11-21 16:55:31,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949598666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:55:31,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:55:31,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:55:31,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986643241] [2022-11-21 16:55:31,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:55:31,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:55:31,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:55:31,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:55:31,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:55:31,065 INFO L87 Difference]: Start difference. First operand 3108 states and 4975 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:55:44,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:55:44,978 INFO L93 Difference]: Finished difference Result 10359 states and 16187 transitions. [2022-11-21 16:55:44,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:55:44,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-11-21 16:55:44,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:55:45,006 INFO L225 Difference]: With dead ends: 10359 [2022-11-21 16:55:45,006 INFO L226 Difference]: Without dead ends: 7253 [2022-11-21 16:55:45,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:55:45,014 INFO L413 NwaCegarLoop]: 1024 mSDtfsCounter, 4323 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 9504 mSolverCounterSat, 1498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4323 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 11002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1498 IncrementalHoareTripleChecker+Valid, 9504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:55:45,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4323 Valid, 1292 Invalid, 11002 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1498 Valid, 9504 Invalid, 0 Unknown, 0 Unchecked, 13.6s Time] [2022-11-21 16:55:45,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7253 states. [2022-11-21 16:55:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7253 to 7249. [2022-11-21 16:55:45,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7249 states, 7248 states have (on average 1.4503311258278146) internal successors, (10512), 7248 states have internal predecessors, (10512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:55:45,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7249 states to 7249 states and 10512 transitions. [2022-11-21 16:55:45,195 INFO L78 Accepts]: Start accepts. Automaton has 7249 states and 10512 transitions. Word has length 99 [2022-11-21 16:55:45,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:55:45,195 INFO L495 AbstractCegarLoop]: Abstraction has 7249 states and 10512 transitions. [2022-11-21 16:55:45,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:55:45,196 INFO L276 IsEmpty]: Start isEmpty. Operand 7249 states and 10512 transitions. [2022-11-21 16:55:45,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-11-21 16:55:45,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:55:45,213 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:55:45,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:55:45,216 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:55:45,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:55:45,221 INFO L85 PathProgramCache]: Analyzing trace with hash -75059495, now seen corresponding path program 1 times [2022-11-21 16:55:45,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:55:45,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308827656] [2022-11-21 16:55:45,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:55:45,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:55:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:46,487 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-21 16:55:46,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:55:46,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308827656] [2022-11-21 16:55:46,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308827656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:55:46,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:55:46,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:55:46,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340641119] [2022-11-21 16:55:46,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:55:46,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:55:46,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:55:46,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:55:46,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:55:46,494 INFO L87 Difference]: Start difference. First operand 7249 states and 10512 transitions. Second operand has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 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) [2022-11-21 16:55:58,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:55:58,735 INFO L93 Difference]: Finished difference Result 17269 states and 24867 transitions. [2022-11-21 16:55:58,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:55:58,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 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 306 [2022-11-21 16:55:58,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:55:58,773 INFO L225 Difference]: With dead ends: 17269 [2022-11-21 16:55:58,774 INFO L226 Difference]: Without dead ends: 11387 [2022-11-21 16:55:58,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:55:58,789 INFO L413 NwaCegarLoop]: 1803 mSDtfsCounter, 3756 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 9455 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3756 SdHoareTripleChecker+Valid, 2157 SdHoareTripleChecker+Invalid, 9885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 9455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:55:58,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3756 Valid, 2157 Invalid, 9885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 9455 Invalid, 0 Unknown, 0 Unchecked, 12.0s Time] [2022-11-21 16:55:58,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11387 states. [2022-11-21 16:55:58,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11387 to 11367. [2022-11-21 16:55:58,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11367 states, 11366 states have (on average 1.3286116487770543) internal successors, (15101), 11366 states have internal predecessors, (15101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:55:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11367 states to 11367 states and 15101 transitions. [2022-11-21 16:55:59,015 INFO L78 Accepts]: Start accepts. Automaton has 11367 states and 15101 transitions. Word has length 306 [2022-11-21 16:55:59,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:55:59,017 INFO L495 AbstractCegarLoop]: Abstraction has 11367 states and 15101 transitions. [2022-11-21 16:55:59,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 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) [2022-11-21 16:55:59,018 INFO L276 IsEmpty]: Start isEmpty. Operand 11367 states and 15101 transitions. [2022-11-21 16:55:59,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-11-21 16:55:59,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:55:59,024 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:55:59,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:55:59,025 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:55:59,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:55:59,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1048910783, now seen corresponding path program 1 times [2022-11-21 16:55:59,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:55:59,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38338840] [2022-11-21 16:55:59,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:55:59,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:55:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:55:59,760 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:55:59,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:55:59,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38338840] [2022-11-21 16:55:59,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38338840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:55:59,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:55:59,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:55:59,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960888619] [2022-11-21 16:55:59,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:55:59,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:55:59,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:55:59,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:55:59,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:55:59,763 INFO L87 Difference]: Start difference. First operand 11367 states and 15101 transitions. Second operand has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:09,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:09,167 INFO L93 Difference]: Finished difference Result 20033 states and 27483 transitions. [2022-11-21 16:56:09,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:56:09,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 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 334 [2022-11-21 16:56:09,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:09,202 INFO L225 Difference]: With dead ends: 20033 [2022-11-21 16:56:09,203 INFO L226 Difference]: Without dead ends: 11367 [2022-11-21 16:56:09,212 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 [2022-11-21 16:56:09,213 INFO L413 NwaCegarLoop]: 1775 mSDtfsCounter, 1140 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 7325 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 2117 SdHoareTripleChecker+Invalid, 7333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:09,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1140 Valid, 2117 Invalid, 7333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 7325 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2022-11-21 16:56:09,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11367 states. [2022-11-21 16:56:09,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11367 to 11367. [2022-11-21 16:56:09,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11367 states, 11366 states have (on average 1.3274678866795706) internal successors, (15088), 11366 states have internal predecessors, (15088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:09,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11367 states to 11367 states and 15088 transitions. [2022-11-21 16:56:09,425 INFO L78 Accepts]: Start accepts. Automaton has 11367 states and 15088 transitions. Word has length 334 [2022-11-21 16:56:09,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:09,426 INFO L495 AbstractCegarLoop]: Abstraction has 11367 states and 15088 transitions. [2022-11-21 16:56:09,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:09,426 INFO L276 IsEmpty]: Start isEmpty. Operand 11367 states and 15088 transitions. [2022-11-21 16:56:09,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-11-21 16:56:09,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:09,438 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:56:09,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:56:09,438 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:09,439 INFO L85 PathProgramCache]: Analyzing trace with hash -201289596, now seen corresponding path program 1 times [2022-11-21 16:56:09,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:09,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265032583] [2022-11-21 16:56:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:09,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:09,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:09,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265032583] [2022-11-21 16:56:09,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265032583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:09,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:56:09,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:56:09,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539993044] [2022-11-21 16:56:09,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:09,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:56:09,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:09,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:56:09,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:56:09,977 INFO L87 Difference]: Start difference. First operand 11367 states and 15088 transitions. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 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) [2022-11-21 16:56:17,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:17,995 INFO L93 Difference]: Finished difference Result 25557 states and 36131 transitions. [2022-11-21 16:56:17,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:56:17,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 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) Word has length 519 [2022-11-21 16:56:17,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:18,026 INFO L225 Difference]: With dead ends: 25557 [2022-11-21 16:56:18,026 INFO L226 Difference]: Without dead ends: 16922 [2022-11-21 16:56:18,036 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 [2022-11-21 16:56:18,037 INFO L413 NwaCegarLoop]: 2759 mSDtfsCounter, 1489 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4068 mSolverCounterSat, 1816 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 2936 SdHoareTripleChecker+Invalid, 5884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1816 IncrementalHoareTripleChecker+Valid, 4068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:18,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1489 Valid, 2936 Invalid, 5884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1816 Valid, 4068 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-11-21 16:56:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16922 states. [2022-11-21 16:56:18,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16922 to 16876. [2022-11-21 16:56:18,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16876 states, 16875 states have (on average 1.2959407407407408) internal successors, (21869), 16875 states have internal predecessors, (21869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:18,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16876 states to 16876 states and 21869 transitions. [2022-11-21 16:56:18,414 INFO L78 Accepts]: Start accepts. Automaton has 16876 states and 21869 transitions. Word has length 519 [2022-11-21 16:56:18,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:18,416 INFO L495 AbstractCegarLoop]: Abstraction has 16876 states and 21869 transitions. [2022-11-21 16:56:18,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 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) [2022-11-21 16:56:18,420 INFO L276 IsEmpty]: Start isEmpty. Operand 16876 states and 21869 transitions. [2022-11-21 16:56:18,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 589 [2022-11-21 16:56:18,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:18,435 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:56:18,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:56:18,435 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:18,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:18,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1471545464, now seen corresponding path program 1 times [2022-11-21 16:56:18,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:18,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507734959] [2022-11-21 16:56:18,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:18,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 81 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:19,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:19,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507734959] [2022-11-21 16:56:19,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507734959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:56:19,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130229315] [2022-11-21 16:56:19,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:19,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:56:19,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:56:19,639 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:56:19,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:56:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:19,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 16:56:19,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:56:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:20,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:56:20,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130229315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:20,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:56:20,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-21 16:56:20,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68126578] [2022-11-21 16:56:20,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:20,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:56:20,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:20,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:56:20,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:56:20,142 INFO L87 Difference]: Start difference. First operand 16876 states and 21869 transitions. Second operand has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:28,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:28,252 INFO L93 Difference]: Finished difference Result 43303 states and 57896 transitions. [2022-11-21 16:56:28,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:56:28,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 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 588 [2022-11-21 16:56:28,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:28,312 INFO L225 Difference]: With dead ends: 43303 [2022-11-21 16:56:28,312 INFO L226 Difference]: Without dead ends: 29159 [2022-11-21 16:56:28,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 587 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:56:28,329 INFO L413 NwaCegarLoop]: 707 mSDtfsCounter, 2533 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4054 mSolverCounterSat, 1472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2533 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 5526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1472 IncrementalHoareTripleChecker+Valid, 4054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:28,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2533 Valid, 816 Invalid, 5526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1472 Valid, 4054 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-11-21 16:56:28,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29159 states. [2022-11-21 16:56:28,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29159 to 29155. [2022-11-21 16:56:28,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29155 states, 29154 states have (on average 1.297592097139329) internal successors, (37830), 29154 states have internal predecessors, (37830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:28,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29155 states to 29155 states and 37830 transitions. [2022-11-21 16:56:28,755 INFO L78 Accepts]: Start accepts. Automaton has 29155 states and 37830 transitions. Word has length 588 [2022-11-21 16:56:28,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:28,757 INFO L495 AbstractCegarLoop]: Abstraction has 29155 states and 37830 transitions. [2022-11-21 16:56:28,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:28,757 INFO L276 IsEmpty]: Start isEmpty. Operand 29155 states and 37830 transitions. [2022-11-21 16:56:28,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2022-11-21 16:56:28,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:28,773 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:56:28,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-21 16:56:28,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:56:28,979 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:28,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:28,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1541118034, now seen corresponding path program 1 times [2022-11-21 16:56:28,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:28,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60645775] [2022-11-21 16:56:28,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:28,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:30,813 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 59 proven. 40 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-21 16:56:30,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:30,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60645775] [2022-11-21 16:56:30,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60645775] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:56:30,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008475906] [2022-11-21 16:56:30,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:30,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:56:30,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:56:30,819 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:56:30,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:56:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:31,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 16:56:31,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:56:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:31,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:56:31,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008475906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:31,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:56:31,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-21 16:56:31,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307043507] [2022-11-21 16:56:31,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:31,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:56:31,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:31,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:56:31,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:56:31,308 INFO L87 Difference]: Start difference. First operand 29155 states and 37830 transitions. Second operand has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:39,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:39,606 INFO L93 Difference]: Finished difference Result 77415 states and 102356 transitions. [2022-11-21 16:56:39,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:56:39,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 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 641 [2022-11-21 16:56:39,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:39,688 INFO L225 Difference]: With dead ends: 77415 [2022-11-21 16:56:39,688 INFO L226 Difference]: Without dead ends: 50992 [2022-11-21 16:56:39,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 640 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:56:39,715 INFO L413 NwaCegarLoop]: 1541 mSDtfsCounter, 1544 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 3903 mSolverCounterSat, 1728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1544 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 5631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1728 IncrementalHoareTripleChecker+Valid, 3903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:39,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1544 Valid, 1676 Invalid, 5631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1728 Valid, 3903 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-11-21 16:56:39,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50992 states. [2022-11-21 16:56:40,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50992 to 46896. [2022-11-21 16:56:40,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46896 states, 46895 states have (on average 1.2159505277748162) internal successors, (57022), 46895 states have internal predecessors, (57022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:40,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46896 states to 46896 states and 57022 transitions. [2022-11-21 16:56:40,556 INFO L78 Accepts]: Start accepts. Automaton has 46896 states and 57022 transitions. Word has length 641 [2022-11-21 16:56:40,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:40,557 INFO L495 AbstractCegarLoop]: Abstraction has 46896 states and 57022 transitions. [2022-11-21 16:56:40,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:40,557 INFO L276 IsEmpty]: Start isEmpty. Operand 46896 states and 57022 transitions. [2022-11-21 16:56:40,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2022-11-21 16:56:40,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:40,576 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:56:40,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-21 16:56:40,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-21 16:56:40,781 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:40,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:40,782 INFO L85 PathProgramCache]: Analyzing trace with hash -589989668, now seen corresponding path program 1 times [2022-11-21 16:56:40,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:40,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28966473] [2022-11-21 16:56:40,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:40,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:41,700 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-11-21 16:56:41,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:41,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28966473] [2022-11-21 16:56:41,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28966473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:41,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:56:41,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:56:41,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994968346] [2022-11-21 16:56:41,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:41,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:56:41,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:41,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:56:41,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:56:41,704 INFO L87 Difference]: Start difference. First operand 46896 states and 57022 transitions. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:50,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:56:50,035 INFO L93 Difference]: Finished difference Result 108820 states and 133070 transitions. [2022-11-21 16:56:50,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:56:50,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 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 731 [2022-11-21 16:56:50,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:56:50,118 INFO L225 Difference]: With dead ends: 108820 [2022-11-21 16:56:50,118 INFO L226 Difference]: Without dead ends: 64656 [2022-11-21 16:56:50,147 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 [2022-11-21 16:56:50,148 INFO L413 NwaCegarLoop]: 3065 mSDtfsCounter, 1379 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 4589 mSolverCounterSat, 915 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1379 SdHoareTripleChecker+Valid, 3251 SdHoareTripleChecker+Invalid, 5504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 915 IncrementalHoareTripleChecker+Valid, 4589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:56:50,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1379 Valid, 3251 Invalid, 5504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [915 Valid, 4589 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-11-21 16:56:50,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64656 states. [2022-11-21 16:56:50,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64656 to 56459. [2022-11-21 16:56:50,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56459 states, 56458 states have (on average 1.190566438768642) internal successors, (67217), 56458 states have internal predecessors, (67217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:50,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56459 states to 56459 states and 67217 transitions. [2022-11-21 16:56:50,887 INFO L78 Accepts]: Start accepts. Automaton has 56459 states and 67217 transitions. Word has length 731 [2022-11-21 16:56:50,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:56:50,888 INFO L495 AbstractCegarLoop]: Abstraction has 56459 states and 67217 transitions. [2022-11-21 16:56:50,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:56:50,888 INFO L276 IsEmpty]: Start isEmpty. Operand 56459 states and 67217 transitions. [2022-11-21 16:56:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 739 [2022-11-21 16:56:50,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:56:50,896 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:56:50,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:56:50,896 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:56:50,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:56:50,897 INFO L85 PathProgramCache]: Analyzing trace with hash -2012860575, now seen corresponding path program 1 times [2022-11-21 16:56:50,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:56:50,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301428324] [2022-11-21 16:56:50,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:50,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:56:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 59 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:56:54,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:56:54,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301428324] [2022-11-21 16:56:54,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301428324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:56:54,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879676863] [2022-11-21 16:56:54,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:56:54,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:56:54,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:56:54,031 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:56:54,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:56:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:56:54,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 16:56:54,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:56:54,432 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-11-21 16:56:54,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:56:54,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879676863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:56:54,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:56:54,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-11-21 16:56:54,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326718586] [2022-11-21 16:56:54,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:56:54,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:56:54,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:56:54,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:56:54,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:56:54,435 INFO L87 Difference]: Start difference. First operand 56459 states and 67217 transitions. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:03,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:57:03,493 INFO L93 Difference]: Finished difference Result 138928 states and 167694 transitions. [2022-11-21 16:57:03,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:57:03,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 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 738 [2022-11-21 16:57:03,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:57:03,593 INFO L225 Difference]: With dead ends: 138928 [2022-11-21 16:57:03,594 INFO L226 Difference]: Without dead ends: 85201 [2022-11-21 16:57:03,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 737 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:57:03,620 INFO L413 NwaCegarLoop]: 3075 mSDtfsCounter, 1447 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 4993 mSolverCounterSat, 990 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1447 SdHoareTripleChecker+Valid, 3246 SdHoareTripleChecker+Invalid, 5983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 990 IncrementalHoareTripleChecker+Valid, 4993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:57:03,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1447 Valid, 3246 Invalid, 5983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [990 Valid, 4993 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-11-21 16:57:03,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85201 states. [2022-11-21 16:57:04,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85201 to 85137. [2022-11-21 16:57:04,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85137 states, 85136 states have (on average 1.1609424920127795) internal successors, (98838), 85136 states have internal predecessors, (98838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:04,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85137 states to 85137 states and 98838 transitions. [2022-11-21 16:57:04,623 INFO L78 Accepts]: Start accepts. Automaton has 85137 states and 98838 transitions. Word has length 738 [2022-11-21 16:57:04,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:57:04,623 INFO L495 AbstractCegarLoop]: Abstraction has 85137 states and 98838 transitions. [2022-11-21 16:57:04,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:04,624 INFO L276 IsEmpty]: Start isEmpty. Operand 85137 states and 98838 transitions. [2022-11-21 16:57:04,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2022-11-21 16:57:04,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:57:04,633 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:57:04,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-21 16:57:04,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:57:04,839 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:57:04,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:04,839 INFO L85 PathProgramCache]: Analyzing trace with hash 92865929, now seen corresponding path program 1 times [2022-11-21 16:57:04,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:04,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584318950] [2022-11-21 16:57:04,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:04,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:05,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-11-21 16:57:05,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:05,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584318950] [2022-11-21 16:57:05,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584318950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:57:05,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:57:05,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:57:05,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578854627] [2022-11-21 16:57:05,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:57:05,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:57:05,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:05,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:57:05,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:57:05,711 INFO L87 Difference]: Start difference. First operand 85137 states and 98838 transitions. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:14,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:57:14,688 INFO L93 Difference]: Finished difference Result 193497 states and 228460 transitions. [2022-11-21 16:57:14,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:57:14,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 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 825 [2022-11-21 16:57:14,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:57:14,799 INFO L225 Difference]: With dead ends: 193497 [2022-11-21 16:57:14,800 INFO L226 Difference]: Without dead ends: 111092 [2022-11-21 16:57:14,830 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 [2022-11-21 16:57:14,831 INFO L413 NwaCegarLoop]: 1473 mSDtfsCounter, 1521 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 4024 mSolverCounterSat, 1697 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1521 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 5721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1697 IncrementalHoareTripleChecker+Valid, 4024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:57:14,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1521 Valid, 1661 Invalid, 5721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1697 Valid, 4024 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-11-21 16:57:14,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111092 states. [2022-11-21 16:57:15,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111092 to 86455. [2022-11-21 16:57:15,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86455 states, 86454 states have (on average 1.1588243458949268) internal successors, (100185), 86454 states have internal predecessors, (100185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:15,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86455 states to 86455 states and 100185 transitions. [2022-11-21 16:57:15,932 INFO L78 Accepts]: Start accepts. Automaton has 86455 states and 100185 transitions. Word has length 825 [2022-11-21 16:57:15,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:57:15,932 INFO L495 AbstractCegarLoop]: Abstraction has 86455 states and 100185 transitions. [2022-11-21 16:57:15,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:15,933 INFO L276 IsEmpty]: Start isEmpty. Operand 86455 states and 100185 transitions. [2022-11-21 16:57:15,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 892 [2022-11-21 16:57:15,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:57:15,943 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:57:15,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 16:57:15,943 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:57:15,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:15,944 INFO L85 PathProgramCache]: Analyzing trace with hash 620840207, now seen corresponding path program 1 times [2022-11-21 16:57:15,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:15,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241243257] [2022-11-21 16:57:15,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:15,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:17,690 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 408 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-11-21 16:57:17,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:17,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241243257] [2022-11-21 16:57:17,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241243257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:57:17,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:57:17,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:57:17,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367763143] [2022-11-21 16:57:17,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:57:17,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:57:17,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:17,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:57:17,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:57:17,693 INFO L87 Difference]: Start difference. First operand 86455 states and 100185 transitions. Second operand has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:25,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:57:25,712 INFO L93 Difference]: Finished difference Result 170228 states and 197709 transitions. [2022-11-21 16:57:25,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:57:25,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 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 891 [2022-11-21 16:57:25,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:57:25,810 INFO L225 Difference]: With dead ends: 170228 [2022-11-21 16:57:25,810 INFO L226 Difference]: Without dead ends: 86505 [2022-11-21 16:57:25,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:57:25,849 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 1592 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 4229 mSolverCounterSat, 1555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1592 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 5784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1555 IncrementalHoareTripleChecker+Valid, 4229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:57:25,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1592 Valid, 576 Invalid, 5784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1555 Valid, 4229 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-11-21 16:57:25,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86505 states. [2022-11-21 16:57:26,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86505 to 86450. [2022-11-21 16:57:26,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86450 states, 86449 states have (on average 1.1542643639602541) internal successors, (99785), 86449 states have internal predecessors, (99785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:26,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86450 states to 86450 states and 99785 transitions. [2022-11-21 16:57:26,906 INFO L78 Accepts]: Start accepts. Automaton has 86450 states and 99785 transitions. Word has length 891 [2022-11-21 16:57:26,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:57:26,907 INFO L495 AbstractCegarLoop]: Abstraction has 86450 states and 99785 transitions. [2022-11-21 16:57:26,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:26,907 INFO L276 IsEmpty]: Start isEmpty. Operand 86450 states and 99785 transitions. [2022-11-21 16:57:26,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 893 [2022-11-21 16:57:26,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:57:26,918 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:57:26,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 16:57:26,918 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:57:26,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:26,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1213627007, now seen corresponding path program 1 times [2022-11-21 16:57:26,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:26,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122678577] [2022-11-21 16:57:26,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:26,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 709 backedges. 190 proven. 395 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-21 16:57:29,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:29,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122678577] [2022-11-21 16:57:29,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122678577] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:57:29,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597981148] [2022-11-21 16:57:29,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:29,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:57:29,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:57:29,175 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:57:29,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:57:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:29,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 16:57:29,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:57:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 709 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2022-11-21 16:57:29,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:57:29,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597981148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:57:29,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:57:29,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-21 16:57:29,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676379398] [2022-11-21 16:57:29,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:57:29,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:57:29,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:29,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:57:29,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:57:29,703 INFO L87 Difference]: Start difference. First operand 86450 states and 99785 transitions. Second operand has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:38,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:57:38,259 INFO L93 Difference]: Finished difference Result 193455 states and 225614 transitions. [2022-11-21 16:57:38,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:57:38,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 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 892 [2022-11-21 16:57:38,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:57:38,363 INFO L225 Difference]: With dead ends: 193455 [2022-11-21 16:57:38,363 INFO L226 Difference]: Without dead ends: 109737 [2022-11-21 16:57:38,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 896 GetRequests, 893 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:57:38,386 INFO L413 NwaCegarLoop]: 1078 mSDtfsCounter, 1551 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 4146 mSolverCounterSat, 1814 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1551 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 5960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1814 IncrementalHoareTripleChecker+Valid, 4146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:57:38,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1551 Valid, 1198 Invalid, 5960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1814 Valid, 4146 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-11-21 16:57:38,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109737 states. [2022-11-21 16:57:39,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109737 to 109655. [2022-11-21 16:57:39,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109655 states, 109654 states have (on average 1.1543217757674138) internal successors, (126576), 109654 states have internal predecessors, (126576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:39,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109655 states to 109655 states and 126576 transitions. [2022-11-21 16:57:39,669 INFO L78 Accepts]: Start accepts. Automaton has 109655 states and 126576 transitions. Word has length 892 [2022-11-21 16:57:39,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:57:39,670 INFO L495 AbstractCegarLoop]: Abstraction has 109655 states and 126576 transitions. [2022-11-21 16:57:39,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:39,670 INFO L276 IsEmpty]: Start isEmpty. Operand 109655 states and 126576 transitions. [2022-11-21 16:57:39,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 899 [2022-11-21 16:57:39,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:57:39,680 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:57:39,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:57:39,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-21 16:57:39,886 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:57:39,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:39,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1795250068, now seen corresponding path program 1 times [2022-11-21 16:57:39,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:39,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033154013] [2022-11-21 16:57:39,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:39,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 378 proven. 218 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-21 16:57:42,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:42,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033154013] [2022-11-21 16:57:42,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033154013] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:57:42,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551097191] [2022-11-21 16:57:42,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:42,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:57:42,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:57:42,707 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:57:42,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:57:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:43,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 16:57:43,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:57:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 408 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-11-21 16:57:43,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:57:43,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551097191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:57:43,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:57:43,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-11-21 16:57:43,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784033454] [2022-11-21 16:57:43,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:57:43,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:57:43,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:43,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:57:43,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:57:43,320 INFO L87 Difference]: Start difference. First operand 109655 states and 126576 transitions. Second operand has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:51,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:57:51,435 INFO L93 Difference]: Finished difference Result 256160 states and 296523 transitions. [2022-11-21 16:57:51,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:57:51,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 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 898 [2022-11-21 16:57:51,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:57:51,580 INFO L225 Difference]: With dead ends: 256160 [2022-11-21 16:57:51,580 INFO L226 Difference]: Without dead ends: 145141 [2022-11-21 16:57:51,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 897 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:57:51,615 INFO L413 NwaCegarLoop]: 2498 mSDtfsCounter, 1579 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 3770 mSolverCounterSat, 1876 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1579 SdHoareTripleChecker+Valid, 2577 SdHoareTripleChecker+Invalid, 5646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1876 IncrementalHoareTripleChecker+Valid, 3770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:57:51,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1579 Valid, 2577 Invalid, 5646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1876 Valid, 3770 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-11-21 16:57:51,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145141 states. [2022-11-21 16:57:53,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145141 to 138309. [2022-11-21 16:57:53,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138309 states, 138308 states have (on average 1.1158429013506088) internal successors, (154330), 138308 states have internal predecessors, (154330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:53,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138309 states to 138309 states and 154330 transitions. [2022-11-21 16:57:53,674 INFO L78 Accepts]: Start accepts. Automaton has 138309 states and 154330 transitions. Word has length 898 [2022-11-21 16:57:53,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:57:53,675 INFO L495 AbstractCegarLoop]: Abstraction has 138309 states and 154330 transitions. [2022-11-21 16:57:53,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:57:53,676 INFO L276 IsEmpty]: Start isEmpty. Operand 138309 states and 154330 transitions. [2022-11-21 16:57:53,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 991 [2022-11-21 16:57:53,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:57:53,704 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:57:53,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:57:53,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f070c814-a2d9-448e-8d4f-88f894a6f907/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-21 16:57:53,907 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:57:53,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:57:53,908 INFO L85 PathProgramCache]: Analyzing trace with hash -201804526, now seen corresponding path program 1 times [2022-11-21 16:57:53,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:57:53,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425171603] [2022-11-21 16:57:53,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:57:53,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:57:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:57:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 929 backedges. 690 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-11-21 16:57:55,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:57:55,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425171603] [2022-11-21 16:57:55,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425171603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:57:55,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:57:55,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:57:55,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715151757] [2022-11-21 16:57:55,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:57:55,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:57:55,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:57:55,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:57:55,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:57:55,127 INFO L87 Difference]: Start difference. First operand 138309 states and 154330 transitions. Second operand has 4 states, 4 states have (on average 188.25) internal successors, (753), 4 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:58:09,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:58:09,622 INFO L93 Difference]: Finished difference Result 380453 states and 425857 transitions. [2022-11-21 16:58:09,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:58:09,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 188.25) internal successors, (753), 4 states have internal predecessors, (753), 0 states have call successors, (0), 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 990 [2022-11-21 16:58:09,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:58:09,892 INFO L225 Difference]: With dead ends: 380453 [2022-11-21 16:58:09,892 INFO L226 Difference]: Without dead ends: 244876 [2022-11-21 16:58:09,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:58:09,945 INFO L413 NwaCegarLoop]: 1133 mSDtfsCounter, 3154 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 9030 mSolverCounterSat, 2114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3154 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 11144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2114 IncrementalHoareTripleChecker+Valid, 9030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:58:09,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3154 Valid, 1438 Invalid, 11144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2114 Valid, 9030 Invalid, 0 Unknown, 0 Unchecked, 13.0s Time] [2022-11-21 16:58:10,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244876 states. [2022-11-21 16:58:12,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244876 to 233886. [2022-11-21 16:58:12,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233886 states, 233885 states have (on average 1.1130427346772986) internal successors, (260324), 233885 states have internal predecessors, (260324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:58:13,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233886 states to 233886 states and 260324 transitions. [2022-11-21 16:58:13,125 INFO L78 Accepts]: Start accepts. Automaton has 233886 states and 260324 transitions. Word has length 990 [2022-11-21 16:58:13,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:58:13,126 INFO L495 AbstractCegarLoop]: Abstraction has 233886 states and 260324 transitions. [2022-11-21 16:58:13,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 188.25) internal successors, (753), 4 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:58:13,126 INFO L276 IsEmpty]: Start isEmpty. Operand 233886 states and 260324 transitions. [2022-11-21 16:58:13,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1067 [2022-11-21 16:58:13,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:58:13,141 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:58:13,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-21 16:58:13,141 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:58:13,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:58:13,142 INFO L85 PathProgramCache]: Analyzing trace with hash -470824847, now seen corresponding path program 1 times [2022-11-21 16:58:13,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:58:13,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168333347] [2022-11-21 16:58:13,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:58:13,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:58:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:58:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 655 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-11-21 16:58:14,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:58:14,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168333347] [2022-11-21 16:58:14,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168333347] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:58:14,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:58:14,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:58:14,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242047060] [2022-11-21 16:58:14,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:58:14,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:58:14,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:58:14,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:58:14,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:58:14,416 INFO L87 Difference]: Start difference. First operand 233886 states and 260324 transitions. Second operand has 4 states, 4 states have (on average 175.25) internal successors, (701), 4 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:58:29,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:58:29,658 INFO L93 Difference]: Finished difference Result 626121 states and 703812 transitions. [2022-11-21 16:58:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:58:29,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 175.25) internal successors, (701), 4 states have internal predecessors, (701), 0 states have call successors, (0), 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 1066 [2022-11-21 16:58:29,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:58:30,572 INFO L225 Difference]: With dead ends: 626121 [2022-11-21 16:58:30,572 INFO L226 Difference]: Without dead ends: 394967 [2022-11-21 16:58:30,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:58:30,684 INFO L413 NwaCegarLoop]: 711 mSDtfsCounter, 5037 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 5964 mSolverCounterSat, 4164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5037 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 10128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4164 IncrementalHoareTripleChecker+Valid, 5964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:58:30,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5037 Valid, 844 Invalid, 10128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4164 Valid, 5964 Invalid, 0 Unknown, 0 Unchecked, 13.0s Time] [2022-11-21 16:58:30,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394967 states.