./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem15_label36.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/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_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem15_label36.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/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_749854c7-03f9-4dc4-b4dd-4550f333d762/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 f8c7f180e45ffba5eb47ee4dc238e0b48ee8dddec8c88fb0da95366e7d605cc2 --- 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 16:58:14,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:58:14,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:58:14,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:58:14,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:58:14,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:58:14,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:58:14,403 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:58:14,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:58:14,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:58:14,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:58:14,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:58:14,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:58:14,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:58:14,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:58:14,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:58:14,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:58:14,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:58:14,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:58:14,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:58:14,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:58:14,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:58:14,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:58:14,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:58:14,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:58:14,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:58:14,450 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:58:14,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:58:14,452 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:58:14,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:58:14,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:58:14,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:58:14,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:58:14,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:58:14,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:58:14,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:58:14,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:58:14,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:58:14,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:58:14,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:58:14,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:58:14,465 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:58:14,511 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:58:14,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:58:14,513 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:58:14,513 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:58:14,514 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:58:14,514 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:58:14,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:58:14,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:58:14,515 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:58:14,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:58:14,517 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:58:14,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:58:14,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:58:14,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:58:14,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:58:14,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:58:14,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:58:14,518 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:58:14,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:58:14,518 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:58:14,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:58:14,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:58:14,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:58:14,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:58:14,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:58:14,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:58:14,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:58:14,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:58:14,521 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:58:14,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:58:14,521 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:58:14,521 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:58:14,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:58:14,522 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_749854c7-03f9-4dc4-b4dd-4550f333d762/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8c7f180e45ffba5eb47ee4dc238e0b48ee8dddec8c88fb0da95366e7d605cc2 [2022-11-21 16:58:14,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:58:14,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:58:14,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:58:14,904 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:58:14,904 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:58:14,906 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/eca-rers2012/Problem15_label36.c [2022-11-21 16:58:18,056 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:58:18,528 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:58:18,528 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/sv-benchmarks/c/eca-rers2012/Problem15_label36.c [2022-11-21 16:58:18,547 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/data/40d3e2940/25269e70b8f04e958da787b00f584327/FLAGcf3019781 [2022-11-21 16:58:18,564 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/data/40d3e2940/25269e70b8f04e958da787b00f584327 [2022-11-21 16:58:18,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:58:18,569 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:58:18,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:58:18,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:58:18,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:58:18,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:58:18" (1/1) ... [2022-11-21 16:58:18,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75011807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:58:18, skipping insertion in model container [2022-11-21 16:58:18,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:58:18" (1/1) ... [2022-11-21 16:58:18,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:58:18,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:58:18,962 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_749854c7-03f9-4dc4-b4dd-4550f333d762/sv-benchmarks/c/eca-rers2012/Problem15_label36.c[7434,7447] [2022-11-21 16:58:19,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:58:19,541 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:58:19,588 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_749854c7-03f9-4dc4-b4dd-4550f333d762/sv-benchmarks/c/eca-rers2012/Problem15_label36.c[7434,7447] [2022-11-21 16:58:19,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:58:20,007 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:58:20,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:58:20 WrapperNode [2022-11-21 16:58:20,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:58:20,010 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:58:20,010 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:58:20,010 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:58:20,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:58:20" (1/1) ... [2022-11-21 16:58:20,073 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:58:20" (1/1) ... [2022-11-21 16:58:20,226 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2022-11-21 16:58:20,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:58:20,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:58:20,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:58:20,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:58:20,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:58:20" (1/1) ... [2022-11-21 16:58:20,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:58:20" (1/1) ... [2022-11-21 16:58:20,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:58:20" (1/1) ... [2022-11-21 16:58:20,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:58:20" (1/1) ... [2022-11-21 16:58:20,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:58:20" (1/1) ... [2022-11-21 16:58:20,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:58:20" (1/1) ... [2022-11-21 16:58:20,496 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:58:20" (1/1) ... [2022-11-21 16:58:20,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:58:20" (1/1) ... [2022-11-21 16:58:20,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:58:20,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:58:20,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:58:20,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:58:20,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:58:20" (1/1) ... [2022-11-21 16:58:20,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:58:20,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:58:20,699 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:58:20,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:58:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:58:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:58:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:58:20,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:58:20,844 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:58:20,846 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:58:24,394 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:58:24,411 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:58:24,417 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-21 16:58:24,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:58:24 BoogieIcfgContainer [2022-11-21 16:58:24,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:58:24,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:58:24,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:58:24,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:58:24,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:58:18" (1/3) ... [2022-11-21 16:58:24,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@790e8048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:58:24, skipping insertion in model container [2022-11-21 16:58:24,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:58:20" (2/3) ... [2022-11-21 16:58:24,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@790e8048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:58:24, skipping insertion in model container [2022-11-21 16:58:24,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:58:24" (3/3) ... [2022-11-21 16:58:24,436 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label36.c [2022-11-21 16:58:24,459 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:58:24,460 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:58:24,557 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:58:24,566 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;@3c968fc7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:58:24,567 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 16:58:24,576 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 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 16:58:24,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-21 16:58:24,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:58:24,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:58:24,593 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:58:24,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:58:24,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1818267785, now seen corresponding path program 1 times [2022-11-21 16:58:24,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:58:24,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427849489] [2022-11-21 16:58:24,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:58:24,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:58:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:58:25,059 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 16:58:25,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:58:25,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427849489] [2022-11-21 16:58:25,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427849489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:58:25,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:58:25,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:58:25,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526002891] [2022-11-21 16:58:25,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:58:25,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:58:25,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:58:25,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:58:25,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:58:25,119 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 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 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 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 16:58:28,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:58:28,041 INFO L93 Difference]: Finished difference Result 1155 states and 2106 transitions. [2022-11-21 16:58:28,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:58:28,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2022-11-21 16:58:28,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:58:28,063 INFO L225 Difference]: With dead ends: 1155 [2022-11-21 16:58:28,064 INFO L226 Difference]: Without dead ends: 667 [2022-11-21 16:58:28,069 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 16:58:28,073 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 283 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:58:28,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 371 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-21 16:58:28,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-11-21 16:58:28,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 665. [2022-11-21 16:58:28,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 1.4789156626506024) internal successors, (982), 664 states have internal predecessors, (982), 0 states have call successors, (0), 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 16:58:28,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 982 transitions. [2022-11-21 16:58:28,171 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 982 transitions. Word has length 61 [2022-11-21 16:58:28,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:58:28,172 INFO L495 AbstractCegarLoop]: Abstraction has 665 states and 982 transitions. [2022-11-21 16:58:28,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 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 16:58:28,172 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 982 transitions. [2022-11-21 16:58:28,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-21 16:58:28,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:58:28,177 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 16:58:28,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:58:28,178 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:58:28,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:58:28,179 INFO L85 PathProgramCache]: Analyzing trace with hash -12161809, now seen corresponding path program 1 times [2022-11-21 16:58:28,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:58:28,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328051852] [2022-11-21 16:58:28,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:58:28,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:58:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:58:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:58:28,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:58:28,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328051852] [2022-11-21 16:58:28,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328051852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:58:28,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:58:28,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:58:28,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793547902] [2022-11-21 16:58:28,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:58:28,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:58:28,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:58:28,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:58:28,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:58:28,475 INFO L87 Difference]: Start difference. First operand 665 states and 982 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 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 16:58:32,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:58:32,011 INFO L93 Difference]: Finished difference Result 1955 states and 2894 transitions. [2022-11-21 16:58:32,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:58:32,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2022-11-21 16:58:32,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:58:32,025 INFO L225 Difference]: With dead ends: 1955 [2022-11-21 16:58:32,025 INFO L226 Difference]: Without dead ends: 1292 [2022-11-21 16:58:32,038 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 16:58:32,040 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 258 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:58:32,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 327 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-21 16:58:32,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2022-11-21 16:58:32,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 1282. [2022-11-21 16:58:32,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 1.3989071038251366) internal successors, (1792), 1281 states have internal predecessors, (1792), 0 states have call successors, (0), 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 16:58:32,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1792 transitions. [2022-11-21 16:58:32,098 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1792 transitions. Word has length 136 [2022-11-21 16:58:32,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:58:32,099 INFO L495 AbstractCegarLoop]: Abstraction has 1282 states and 1792 transitions. [2022-11-21 16:58:32,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 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 16:58:32,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1792 transitions. [2022-11-21 16:58:32,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-21 16:58:32,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:58:32,115 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 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 16:58:32,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:58:32,115 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:58:32,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:58:32,116 INFO L85 PathProgramCache]: Analyzing trace with hash 527052153, now seen corresponding path program 1 times [2022-11-21 16:58:32,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:58:32,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097047653] [2022-11-21 16:58:32,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:58:32,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:58:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:58:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:58:32,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:58:32,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097047653] [2022-11-21 16:58:32,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097047653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:58:32,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:58:32,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:58:32,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265332412] [2022-11-21 16:58:32,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:58:32,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:58:32,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:58:32,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:58:32,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:58:32,467 INFO L87 Difference]: Start difference. First operand 1282 states and 1792 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 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 16:58:35,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:58:35,330 INFO L93 Difference]: Finished difference Result 3764 states and 5263 transitions. [2022-11-21 16:58:35,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:58:35,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2022-11-21 16:58:35,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:58:35,340 INFO L225 Difference]: With dead ends: 3764 [2022-11-21 16:58:35,341 INFO L226 Difference]: Without dead ends: 2484 [2022-11-21 16:58:35,343 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 16:58:35,345 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 236 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:58:35,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 366 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-21 16:58:35,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2022-11-21 16:58:35,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 2182. [2022-11-21 16:58:35,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2181 states have (on average 1.2815222375057314) internal successors, (2795), 2181 states have internal predecessors, (2795), 0 states have call successors, (0), 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 16:58:35,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 2795 transitions. [2022-11-21 16:58:35,406 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 2795 transitions. Word has length 140 [2022-11-21 16:58:35,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:58:35,408 INFO L495 AbstractCegarLoop]: Abstraction has 2182 states and 2795 transitions. [2022-11-21 16:58:35,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 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 16:58:35,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 2795 transitions. [2022-11-21 16:58:35,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-11-21 16:58:35,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:58:35,446 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, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:58:35,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:58:35,446 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:58:35,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:58:35,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1978174500, now seen corresponding path program 1 times [2022-11-21 16:58:35,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:58:35,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247466760] [2022-11-21 16:58:35,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:58:35,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:58:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:58:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-21 16:58:35,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:58:35,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247466760] [2022-11-21 16:58:35,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247466760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:58:35,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:58:35,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:58:35,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760722742] [2022-11-21 16:58:35,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:58:35,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:58:35,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:58:35,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:58:35,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:58:35,723 INFO L87 Difference]: Start difference. First operand 2182 states and 2795 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 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 16:58:37,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:58:37,980 INFO L93 Difference]: Finished difference Result 6166 states and 7961 transitions. [2022-11-21 16:58:37,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:58:37,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 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 231 [2022-11-21 16:58:37,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:58:37,995 INFO L225 Difference]: With dead ends: 6166 [2022-11-21 16:58:37,996 INFO L226 Difference]: Without dead ends: 3986 [2022-11-21 16:58:37,999 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 16:58:38,000 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 257 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:58:38,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 339 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-21 16:58:38,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2022-11-21 16:58:38,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 3682. [2022-11-21 16:58:38,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3682 states, 3681 states have (on average 1.2200488997555012) internal successors, (4491), 3681 states have internal predecessors, (4491), 0 states have call successors, (0), 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 16:58:38,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 4491 transitions. [2022-11-21 16:58:38,098 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 4491 transitions. Word has length 231 [2022-11-21 16:58:38,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:58:38,100 INFO L495 AbstractCegarLoop]: Abstraction has 3682 states and 4491 transitions. [2022-11-21 16:58:38,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 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 16:58:38,100 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 4491 transitions. [2022-11-21 16:58:38,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-11-21 16:58:38,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:58:38,108 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, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:58:38,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:58:38,109 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:58:38,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:58:38,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1603270012, now seen corresponding path program 1 times [2022-11-21 16:58:38,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:58:38,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235516003] [2022-11-21 16:58:38,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:58:38,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:58:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:58:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-21 16:58:39,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:58:39,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235516003] [2022-11-21 16:58:39,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235516003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:58:39,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:58:39,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:58:39,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297146156] [2022-11-21 16:58:39,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:58:39,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:58:39,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:58:39,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:58:39,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:58:39,227 INFO L87 Difference]: Start difference. First operand 3682 states and 4491 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:58:41,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:58:41,650 INFO L93 Difference]: Finished difference Result 7661 states and 9291 transitions. [2022-11-21 16:58:41,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:58:41,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 333 [2022-11-21 16:58:41,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:58:41,673 INFO L225 Difference]: With dead ends: 7661 [2022-11-21 16:58:41,681 INFO L226 Difference]: Without dead ends: 3981 [2022-11-21 16:58:41,686 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 16:58:41,687 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:58:41,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 359 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-21 16:58:41,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3981 states. [2022-11-21 16:58:41,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3981 to 3981. [2022-11-21 16:58:41,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3981 states, 3980 states have (on average 1.2050251256281408) internal successors, (4796), 3980 states have internal predecessors, (4796), 0 states have call successors, (0), 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 16:58:41,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3981 states to 3981 states and 4796 transitions. [2022-11-21 16:58:41,844 INFO L78 Accepts]: Start accepts. Automaton has 3981 states and 4796 transitions. Word has length 333 [2022-11-21 16:58:41,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:58:41,845 INFO L495 AbstractCegarLoop]: Abstraction has 3981 states and 4796 transitions. [2022-11-21 16:58:41,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:58:41,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3981 states and 4796 transitions. [2022-11-21 16:58:41,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2022-11-21 16:58:41,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:58:41,859 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, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:58:41,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:58:41,860 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:58:41,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:58:41,862 INFO L85 PathProgramCache]: Analyzing trace with hash -985073555, now seen corresponding path program 1 times [2022-11-21 16:58:41,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:58:41,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709621429] [2022-11-21 16:58:41,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:58:41,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:58:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:58:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-21 16:58:42,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:58:42,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709621429] [2022-11-21 16:58:42,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709621429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:58:42,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:58:42,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:58:42,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448244783] [2022-11-21 16:58:42,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:58:42,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:58:42,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:58:42,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:58:42,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:58:42,463 INFO L87 Difference]: Start difference. First operand 3981 states and 4796 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 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 16:58:45,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:58:45,220 INFO L93 Difference]: Finished difference Result 9465 states and 11674 transitions. [2022-11-21 16:58:45,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:58:45,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 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 348 [2022-11-21 16:58:45,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:58:45,241 INFO L225 Difference]: With dead ends: 9465 [2022-11-21 16:58:45,241 INFO L226 Difference]: Without dead ends: 5785 [2022-11-21 16:58:45,244 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 16:58:45,247 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 255 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:58:45,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 671 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-21 16:58:45,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5785 states. [2022-11-21 16:58:45,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5785 to 5783. [2022-11-21 16:58:45,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5783 states, 5782 states have (on average 1.1675890695261155) internal successors, (6751), 5782 states have internal predecessors, (6751), 0 states have call successors, (0), 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 16:58:45,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5783 states to 5783 states and 6751 transitions. [2022-11-21 16:58:45,364 INFO L78 Accepts]: Start accepts. Automaton has 5783 states and 6751 transitions. Word has length 348 [2022-11-21 16:58:45,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:58:45,365 INFO L495 AbstractCegarLoop]: Abstraction has 5783 states and 6751 transitions. [2022-11-21 16:58:45,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 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 16:58:45,366 INFO L276 IsEmpty]: Start isEmpty. Operand 5783 states and 6751 transitions. [2022-11-21 16:58:45,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2022-11-21 16:58:45,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:58:45,377 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, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:58:45,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 16:58:45,377 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:58:45,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:58:45,378 INFO L85 PathProgramCache]: Analyzing trace with hash -988421462, now seen corresponding path program 1 times [2022-11-21 16:58:45,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:58:45,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079660428] [2022-11-21 16:58:45,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:58:45,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:58:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:58:45,802 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-21 16:58:45,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:58:45,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079660428] [2022-11-21 16:58:45,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079660428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:58:45,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:58:45,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:58:45,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77435721] [2022-11-21 16:58:45,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:58:45,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:58:45,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:58:45,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:58:45,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:58:45,806 INFO L87 Difference]: Start difference. First operand 5783 states and 6751 transitions. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 16:58:48,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:58:48,486 INFO L93 Difference]: Finished difference Result 13364 states and 15910 transitions. [2022-11-21 16:58:48,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:58:48,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 407 [2022-11-21 16:58:48,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:58:48,514 INFO L225 Difference]: With dead ends: 13364 [2022-11-21 16:58:48,515 INFO L226 Difference]: Without dead ends: 7882 [2022-11-21 16:58:48,521 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 16:58:48,522 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 266 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:58:48,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 635 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-21 16:58:48,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7882 states. [2022-11-21 16:58:48,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7882 to 7284. [2022-11-21 16:58:48,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7284 states, 7283 states have (on average 1.148702457778388) internal successors, (8366), 7283 states have internal predecessors, (8366), 0 states have call successors, (0), 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 16:58:48,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7284 states to 7284 states and 8366 transitions. [2022-11-21 16:58:48,672 INFO L78 Accepts]: Start accepts. Automaton has 7284 states and 8366 transitions. Word has length 407 [2022-11-21 16:58:48,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:58:48,673 INFO L495 AbstractCegarLoop]: Abstraction has 7284 states and 8366 transitions. [2022-11-21 16:58:48,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 16:58:48,674 INFO L276 IsEmpty]: Start isEmpty. Operand 7284 states and 8366 transitions. [2022-11-21 16:58:48,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-11-21 16:58:48,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:58:48,684 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, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:58:48,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:58:48,685 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:58:48,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:58:48,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1305181093, now seen corresponding path program 1 times [2022-11-21 16:58:48,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:58:48,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837290682] [2022-11-21 16:58:48,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:58:48,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:58:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:58:49,168 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-21 16:58:49,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:58:49,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837290682] [2022-11-21 16:58:49,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837290682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:58:49,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:58:49,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:58:49,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201441528] [2022-11-21 16:58:49,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:58:49,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:58:49,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:58:49,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:58:49,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:58:49,172 INFO L87 Difference]: Start difference. First operand 7284 states and 8366 transitions. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 16:58:51,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:58:51,532 INFO L93 Difference]: Finished difference Result 16069 states and 18814 transitions. [2022-11-21 16:58:51,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:58:51,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 422 [2022-11-21 16:58:51,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:58:51,567 INFO L225 Difference]: With dead ends: 16069 [2022-11-21 16:58:51,575 INFO L226 Difference]: Without dead ends: 9086 [2022-11-21 16:58:51,585 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 16:58:51,587 INFO L413 NwaCegarLoop]: 585 mSDtfsCounter, 268 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:58:51,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 623 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-21 16:58:51,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9086 states. [2022-11-21 16:58:51,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9086 to 8481. [2022-11-21 16:58:51,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8481 states, 8480 states have (on average 1.1379716981132075) internal successors, (9650), 8480 states have internal predecessors, (9650), 0 states have call successors, (0), 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 16:58:51,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8481 states to 8481 states and 9650 transitions. [2022-11-21 16:58:51,802 INFO L78 Accepts]: Start accepts. Automaton has 8481 states and 9650 transitions. Word has length 422 [2022-11-21 16:58:51,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:58:51,803 INFO L495 AbstractCegarLoop]: Abstraction has 8481 states and 9650 transitions. [2022-11-21 16:58:51,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 16:58:51,804 INFO L276 IsEmpty]: Start isEmpty. Operand 8481 states and 9650 transitions. [2022-11-21 16:58:51,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2022-11-21 16:58:51,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:58:51,903 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 16:58:51,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:58:51,904 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:58:51,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:58:51,905 INFO L85 PathProgramCache]: Analyzing trace with hash -178061979, now seen corresponding path program 1 times [2022-11-21 16:58:51,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:58:51,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789769509] [2022-11-21 16:58:51,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:58:51,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:58:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:58:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 371 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-11-21 16:58:52,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:58:52,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789769509] [2022-11-21 16:58:52,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789769509] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:58:52,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:58:52,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:58:52,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314158640] [2022-11-21 16:58:52,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:58:52,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:58:52,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:58:52,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:58:52,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:58:52,468 INFO L87 Difference]: Start difference. First operand 8481 states and 9650 transitions. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 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 16:58:55,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:58:55,031 INFO L93 Difference]: Finished difference Result 19651 states and 22543 transitions. [2022-11-21 16:58:55,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:58:55,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 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 512 [2022-11-21 16:58:55,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:58:55,055 INFO L225 Difference]: With dead ends: 19651 [2022-11-21 16:58:55,056 INFO L226 Difference]: Without dead ends: 11471 [2022-11-21 16:58:55,064 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 16:58:55,065 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 148 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:58:55,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 315 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-21 16:58:55,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11471 states. [2022-11-21 16:58:55,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11471 to 7578. [2022-11-21 16:58:55,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7578 states, 7577 states have (on average 1.1486076283489508) internal successors, (8703), 7577 states have internal predecessors, (8703), 0 states have call successors, (0), 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 16:58:55,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7578 states to 7578 states and 8703 transitions. [2022-11-21 16:58:55,233 INFO L78 Accepts]: Start accepts. Automaton has 7578 states and 8703 transitions. Word has length 512 [2022-11-21 16:58:55,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:58:55,239 INFO L495 AbstractCegarLoop]: Abstraction has 7578 states and 8703 transitions. [2022-11-21 16:58:55,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 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 16:58:55,240 INFO L276 IsEmpty]: Start isEmpty. Operand 7578 states and 8703 transitions. [2022-11-21 16:58:55,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2022-11-21 16:58:55,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:58:55,248 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:58:55,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 16:58:55,249 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:58:55,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:58:55,256 INFO L85 PathProgramCache]: Analyzing trace with hash -596337022, now seen corresponding path program 1 times [2022-11-21 16:58:55,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:58:55,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561714322] [2022-11-21 16:58:55,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:58:55,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:58:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:58:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 527 proven. 39 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-11-21 16:58:56,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:58:56,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561714322] [2022-11-21 16:58:56,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561714322] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:58:56,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936540267] [2022-11-21 16:58:56,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:58:56,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:58:56,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:58:56,345 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:58:56,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:58:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:58:56,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 16:58:56,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:58:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 235 proven. 0 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2022-11-21 16:58:56,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:58:56,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936540267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:58:56,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:58:56,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-21 16:58:56,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820190730] [2022-11-21 16:58:56,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:58:56,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:58:56,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:58:56,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:58:56,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:58:56,863 INFO L87 Difference]: Start difference. First operand 7578 states and 8703 transitions. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 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 16:59:00,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:00,110 INFO L93 Difference]: Finished difference Result 17246 states and 20055 transitions. [2022-11-21 16:59:00,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:59:00,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 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 545 [2022-11-21 16:59:00,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:00,130 INFO L225 Difference]: With dead ends: 17246 [2022-11-21 16:59:00,130 INFO L226 Difference]: Without dead ends: 9969 [2022-11-21 16:59:00,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:59:00,138 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 356 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:00,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 447 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-21 16:59:00,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9969 states. [2022-11-21 16:59:00,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9969 to 9969. [2022-11-21 16:59:00,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9969 states, 9968 states have (on average 1.1499799357945426) internal successors, (11463), 9968 states have internal predecessors, (11463), 0 states have call successors, (0), 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 16:59:00,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9969 states to 9969 states and 11463 transitions. [2022-11-21 16:59:00,325 INFO L78 Accepts]: Start accepts. Automaton has 9969 states and 11463 transitions. Word has length 545 [2022-11-21 16:59:00,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:00,327 INFO L495 AbstractCegarLoop]: Abstraction has 9969 states and 11463 transitions. [2022-11-21 16:59:00,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 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 16:59:00,327 INFO L276 IsEmpty]: Start isEmpty. Operand 9969 states and 11463 transitions. [2022-11-21 16:59:00,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2022-11-21 16:59:00,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:00,335 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:00,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:59:00,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 16:59:00,544 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:59:00,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:00,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1882152332, now seen corresponding path program 1 times [2022-11-21 16:59:00,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:00,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139277296] [2022-11-21 16:59:00,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:00,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 471 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-11-21 16:59:01,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:01,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139277296] [2022-11-21 16:59:01,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139277296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:59:01,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:59:01,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:59:01,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661992485] [2022-11-21 16:59:01,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:59:01,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:59:01,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:01,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:59:01,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:59:01,588 INFO L87 Difference]: Start difference. First operand 9969 states and 11463 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 16:59:04,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:04,338 INFO L93 Difference]: Finished difference Result 24136 states and 28002 transitions. [2022-11-21 16:59:04,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:59:04,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 549 [2022-11-21 16:59:04,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:04,365 INFO L225 Difference]: With dead ends: 24136 [2022-11-21 16:59:04,366 INFO L226 Difference]: Without dead ends: 14468 [2022-11-21 16:59:04,375 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 16:59:04,376 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 246 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:04,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 621 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-21 16:59:04,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14468 states. [2022-11-21 16:59:04,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14468 to 14158. [2022-11-21 16:59:04,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14158 states, 14157 states have (on average 1.1348449530267712) internal successors, (16066), 14157 states have internal predecessors, (16066), 0 states have call successors, (0), 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 16:59:04,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14158 states to 14158 states and 16066 transitions. [2022-11-21 16:59:04,580 INFO L78 Accepts]: Start accepts. Automaton has 14158 states and 16066 transitions. Word has length 549 [2022-11-21 16:59:04,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:04,581 INFO L495 AbstractCegarLoop]: Abstraction has 14158 states and 16066 transitions. [2022-11-21 16:59:04,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 16:59:04,581 INFO L276 IsEmpty]: Start isEmpty. Operand 14158 states and 16066 transitions. [2022-11-21 16:59:04,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2022-11-21 16:59:04,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:04,641 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, 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, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:04,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 16:59:04,641 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:59:04,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:04,642 INFO L85 PathProgramCache]: Analyzing trace with hash -490695072, now seen corresponding path program 1 times [2022-11-21 16:59:04,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:04,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076892096] [2022-11-21 16:59:04,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:04,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 684 proven. 39 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2022-11-21 16:59:05,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:05,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076892096] [2022-11-21 16:59:05,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076892096] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:59:05,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520106295] [2022-11-21 16:59:05,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:05,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:05,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:59:05,735 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:59:05,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:59:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:06,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 16:59:06,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:59:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 605 proven. 0 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2022-11-21 16:59:06,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:59:06,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520106295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:59:06,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:59:06,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-21 16:59:06,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332840546] [2022-11-21 16:59:06,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:59:06,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:59:06,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:06,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:59:06,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:59:06,341 INFO L87 Difference]: Start difference. First operand 14158 states and 16066 transitions. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:08,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:08,727 INFO L93 Difference]: Finished difference Result 27712 states and 31490 transitions. [2022-11-21 16:59:08,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:59:08,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 624 [2022-11-21 16:59:08,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:08,755 INFO L225 Difference]: With dead ends: 27712 [2022-11-21 16:59:08,755 INFO L226 Difference]: Without dead ends: 13855 [2022-11-21 16:59:08,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 623 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:59:08,769 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 252 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:08,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 604 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-21 16:59:08,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13855 states. [2022-11-21 16:59:08,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13855 to 13854. [2022-11-21 16:59:08,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13854 states, 13853 states have (on average 1.081642965422652) internal successors, (14984), 13853 states have internal predecessors, (14984), 0 states have call successors, (0), 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 16:59:09,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13854 states to 13854 states and 14984 transitions. [2022-11-21 16:59:09,155 INFO L78 Accepts]: Start accepts. Automaton has 13854 states and 14984 transitions. Word has length 624 [2022-11-21 16:59:09,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:09,155 INFO L495 AbstractCegarLoop]: Abstraction has 13854 states and 14984 transitions. [2022-11-21 16:59:09,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:59:09,156 INFO L276 IsEmpty]: Start isEmpty. Operand 13854 states and 14984 transitions. [2022-11-21 16:59:09,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 626 [2022-11-21 16:59:09,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:09,168 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:59:09,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:59:09,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:09,376 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:59:09,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:09,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1471252033, now seen corresponding path program 1 times [2022-11-21 16:59:09,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:09,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917357398] [2022-11-21 16:59:09,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:09,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 611 proven. 39 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-11-21 16:59:10,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:10,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917357398] [2022-11-21 16:59:10,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917357398] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:59:10,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771905352] [2022-11-21 16:59:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:10,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:10,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:59:10,534 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:59:10,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:59:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:10,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 16:59:10,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:59:12,139 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 611 proven. 39 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-11-21 16:59:12,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:59:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 611 proven. 39 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-11-21 16:59:13,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771905352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:59:13,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:59:13,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-21 16:59:13,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218741459] [2022-11-21 16:59:13,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:59:13,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 16:59:13,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:13,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 16:59:13,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:59:13,324 INFO L87 Difference]: Start difference. First operand 13854 states and 14984 transitions. Second operand has 9 states, 9 states have (on average 86.33333333333333) internal successors, (777), 8 states have internal predecessors, (777), 0 states have call successors, (0), 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 16:59:23,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:23,068 INFO L93 Difference]: Finished difference Result 35741 states and 38659 transitions. [2022-11-21 16:59:23,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:59:23,068 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 86.33333333333333) internal successors, (777), 8 states have internal predecessors, (777), 0 states have call successors, (0), 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 625 [2022-11-21 16:59:23,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:23,094 INFO L225 Difference]: With dead ends: 35741 [2022-11-21 16:59:23,095 INFO L226 Difference]: Without dead ends: 16247 [2022-11-21 16:59:23,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1259 GetRequests, 1244 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:59:23,108 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 3105 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 5240 mSolverCounterSat, 699 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3105 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 5939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 699 IncrementalHoareTripleChecker+Valid, 5240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:23,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3105 Valid, 230 Invalid, 5939 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [699 Valid, 5240 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-11-21 16:59:23,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16247 states. [2022-11-21 16:59:23,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16247 to 12357. [2022-11-21 16:59:23,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12357 states, 12356 states have (on average 1.0386047264486888) internal successors, (12833), 12356 states have internal predecessors, (12833), 0 states have call successors, (0), 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 16:59:23,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12357 states to 12357 states and 12833 transitions. [2022-11-21 16:59:23,340 INFO L78 Accepts]: Start accepts. Automaton has 12357 states and 12833 transitions. Word has length 625 [2022-11-21 16:59:23,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:23,340 INFO L495 AbstractCegarLoop]: Abstraction has 12357 states and 12833 transitions. [2022-11-21 16:59:23,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 86.33333333333333) internal successors, (777), 8 states have internal predecessors, (777), 0 states have call successors, (0), 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 16:59:23,341 INFO L276 IsEmpty]: Start isEmpty. Operand 12357 states and 12833 transitions. [2022-11-21 16:59:23,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2022-11-21 16:59:23,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:23,357 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 16:59:23,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:59:23,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:23,566 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:59:23,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:23,566 INFO L85 PathProgramCache]: Analyzing trace with hash -2145955924, now seen corresponding path program 1 times [2022-11-21 16:59:23,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:23,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950484750] [2022-11-21 16:59:23,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:23,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:24,099 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2022-11-21 16:59:24,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:24,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950484750] [2022-11-21 16:59:24,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950484750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:59:24,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:59:24,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:59:24,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444006249] [2022-11-21 16:59:24,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:59:24,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:59:24,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:24,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:59:24,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:59:24,103 INFO L87 Difference]: Start difference. First operand 12357 states and 12833 transitions. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 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 16:59:25,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:25,603 INFO L93 Difference]: Finished difference Result 28295 states and 29436 transitions. [2022-11-21 16:59:25,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:59:25,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 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 662 [2022-11-21 16:59:25,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:25,627 INFO L225 Difference]: With dead ends: 28295 [2022-11-21 16:59:25,627 INFO L226 Difference]: Without dead ends: 15940 [2022-11-21 16:59:25,636 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 16:59:25,637 INFO L413 NwaCegarLoop]: 497 mSDtfsCounter, 253 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:25,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 536 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-21 16:59:25,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15940 states. [2022-11-21 16:59:25,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15940 to 15043. [2022-11-21 16:59:25,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15043 states, 15042 states have (on average 1.032974338518814) internal successors, (15538), 15042 states have internal predecessors, (15538), 0 states have call successors, (0), 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 16:59:25,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15043 states to 15043 states and 15538 transitions. [2022-11-21 16:59:25,883 INFO L78 Accepts]: Start accepts. Automaton has 15043 states and 15538 transitions. Word has length 662 [2022-11-21 16:59:25,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:25,884 INFO L495 AbstractCegarLoop]: Abstraction has 15043 states and 15538 transitions. [2022-11-21 16:59:25,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 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 16:59:25,885 INFO L276 IsEmpty]: Start isEmpty. Operand 15043 states and 15538 transitions. [2022-11-21 16:59:25,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2022-11-21 16:59:25,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:25,899 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 16:59:25,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-21 16:59:25,900 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:59:25,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:25,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1492551500, now seen corresponding path program 1 times [2022-11-21 16:59:25,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:25,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121747545] [2022-11-21 16:59:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:25,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:26,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 528 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-21 16:59:26,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:26,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121747545] [2022-11-21 16:59:26,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121747545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:59:26,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:59:26,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:59:26,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765170051] [2022-11-21 16:59:26,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:59:26,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:59:26,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:26,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:59:26,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:59:26,863 INFO L87 Difference]: Start difference. First operand 15043 states and 15538 transitions. Second operand has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 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 16:59:28,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:28,387 INFO L93 Difference]: Finished difference Result 33081 states and 34229 transitions. [2022-11-21 16:59:28,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:59:28,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 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 686 [2022-11-21 16:59:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:28,411 INFO L225 Difference]: With dead ends: 33081 [2022-11-21 16:59:28,411 INFO L226 Difference]: Without dead ends: 18339 [2022-11-21 16:59:28,422 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 16:59:28,423 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 87 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:28,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 512 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-21 16:59:28,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18339 states. [2022-11-21 16:59:28,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18339 to 18038. [2022-11-21 16:59:28,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18038 states, 18037 states have (on average 1.0326550978544105) internal successors, (18626), 18037 states have internal predecessors, (18626), 0 states have call successors, (0), 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 16:59:28,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18038 states to 18038 states and 18626 transitions. [2022-11-21 16:59:28,775 INFO L78 Accepts]: Start accepts. Automaton has 18038 states and 18626 transitions. Word has length 686 [2022-11-21 16:59:28,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:28,776 INFO L495 AbstractCegarLoop]: Abstraction has 18038 states and 18626 transitions. [2022-11-21 16:59:28,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 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 16:59:28,777 INFO L276 IsEmpty]: Start isEmpty. Operand 18038 states and 18626 transitions. [2022-11-21 16:59:28,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 789 [2022-11-21 16:59:28,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:28,799 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, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:28,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-21 16:59:28,800 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:59:28,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:28,800 INFO L85 PathProgramCache]: Analyzing trace with hash 918291843, now seen corresponding path program 1 times [2022-11-21 16:59:28,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:28,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139090890] [2022-11-21 16:59:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:28,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1322 backedges. 748 proven. 0 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2022-11-21 16:59:29,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:29,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139090890] [2022-11-21 16:59:29,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139090890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:59:29,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:59:29,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:59:29,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941608170] [2022-11-21 16:59:29,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:59:29,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:59:29,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:29,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:59:29,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:59:29,529 INFO L87 Difference]: Start difference. First operand 18038 states and 18626 transitions. Second operand has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 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 16:59:31,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:31,107 INFO L93 Difference]: Finished difference Result 38762 states and 40068 transitions. [2022-11-21 16:59:31,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:59:31,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 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 788 [2022-11-21 16:59:31,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:31,130 INFO L225 Difference]: With dead ends: 38762 [2022-11-21 16:59:31,130 INFO L226 Difference]: Without dead ends: 20726 [2022-11-21 16:59:31,139 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 16:59:31,140 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 183 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:31,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 171 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-21 16:59:31,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20726 states. [2022-11-21 16:59:31,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20726 to 19829. [2022-11-21 16:59:31,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19829 states, 19828 states have (on average 1.030260238047206) internal successors, (20428), 19828 states have internal predecessors, (20428), 0 states have call successors, (0), 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 16:59:31,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19829 states to 19829 states and 20428 transitions. [2022-11-21 16:59:31,559 INFO L78 Accepts]: Start accepts. Automaton has 19829 states and 20428 transitions. Word has length 788 [2022-11-21 16:59:31,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:31,561 INFO L495 AbstractCegarLoop]: Abstraction has 19829 states and 20428 transitions. [2022-11-21 16:59:31,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 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 16:59:31,562 INFO L276 IsEmpty]: Start isEmpty. Operand 19829 states and 20428 transitions. [2022-11-21 16:59:31,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 847 [2022-11-21 16:59:31,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:31,598 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 16:59:31,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-21 16:59:31,599 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:59:31,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:31,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1105372660, now seen corresponding path program 1 times [2022-11-21 16:59:31,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:31,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413973048] [2022-11-21 16:59:31,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:31,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 592 proven. 0 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2022-11-21 16:59:32,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:32,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413973048] [2022-11-21 16:59:32,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413973048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:59:32,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:59:32,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:59:32,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736913901] [2022-11-21 16:59:32,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:59:32,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:59:32,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:32,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:59:32,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:59:32,335 INFO L87 Difference]: Start difference. First operand 19829 states and 20428 transitions. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 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 16:59:33,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:33,753 INFO L93 Difference]: Finished difference Result 42641 states and 44001 transitions. [2022-11-21 16:59:33,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:59:33,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 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 846 [2022-11-21 16:59:33,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:33,774 INFO L225 Difference]: With dead ends: 42641 [2022-11-21 16:59:33,774 INFO L226 Difference]: Without dead ends: 23113 [2022-11-21 16:59:33,780 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 16:59:33,780 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 314 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:33,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 505 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-21 16:59:33,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23113 states. [2022-11-21 16:59:33,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23113 to 19820. [2022-11-21 16:59:33,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19820 states, 19819 states have (on average 1.0282052575811091) internal successors, (20378), 19819 states have internal predecessors, (20378), 0 states have call successors, (0), 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 16:59:34,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19820 states to 19820 states and 20378 transitions. [2022-11-21 16:59:34,009 INFO L78 Accepts]: Start accepts. Automaton has 19820 states and 20378 transitions. Word has length 846 [2022-11-21 16:59:34,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:34,010 INFO L495 AbstractCegarLoop]: Abstraction has 19820 states and 20378 transitions. [2022-11-21 16:59:34,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 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 16:59:34,011 INFO L276 IsEmpty]: Start isEmpty. Operand 19820 states and 20378 transitions. [2022-11-21 16:59:34,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2022-11-21 16:59:34,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:34,028 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 16:59:34,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-21 16:59:34,028 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:59:34,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:34,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1187839850, now seen corresponding path program 1 times [2022-11-21 16:59:34,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:34,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529735267] [2022-11-21 16:59:34,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:34,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1130 backedges. 637 proven. 269 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-11-21 16:59:36,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:36,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529735267] [2022-11-21 16:59:36,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529735267] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:59:36,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886389525] [2022-11-21 16:59:36,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:36,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:36,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:59:36,173 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:59:36,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:59:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:36,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 16:59:36,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:59:36,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1130 backedges. 235 proven. 0 refuted. 0 times theorem prover too weak. 895 trivial. 0 not checked. [2022-11-21 16:59:36,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:59:36,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886389525] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:59:36,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:59:36,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-21 16:59:36,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419308926] [2022-11-21 16:59:36,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:59:36,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:59:36,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:36,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:59:36,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:59:36,773 INFO L87 Difference]: Start difference. First operand 19820 states and 20378 transitions. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 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 16:59:38,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:38,536 INFO L93 Difference]: Finished difference Result 43838 states and 45054 transitions. [2022-11-21 16:59:38,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:59:38,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 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 867 [2022-11-21 16:59:38,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:38,565 INFO L225 Difference]: With dead ends: 43838 [2022-11-21 16:59:38,566 INFO L226 Difference]: Without dead ends: 24319 [2022-11-21 16:59:38,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 866 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:59:38,577 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 268 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:38,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 496 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-21 16:59:38,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24319 states. [2022-11-21 16:59:38,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24319 to 21917. [2022-11-21 16:59:38,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21917 states, 21916 states have (on average 1.0275141449169556) internal successors, (22519), 21916 states have internal predecessors, (22519), 0 states have call successors, (0), 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 16:59:38,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21917 states to 21917 states and 22519 transitions. [2022-11-21 16:59:38,846 INFO L78 Accepts]: Start accepts. Automaton has 21917 states and 22519 transitions. Word has length 867 [2022-11-21 16:59:38,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:38,847 INFO L495 AbstractCegarLoop]: Abstraction has 21917 states and 22519 transitions. [2022-11-21 16:59:38,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 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 16:59:38,848 INFO L276 IsEmpty]: Start isEmpty. Operand 21917 states and 22519 transitions. [2022-11-21 16:59:38,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 901 [2022-11-21 16:59:38,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:38,865 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, 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, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:38,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:59:39,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 16:59:39,066 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:59:39,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:39,067 INFO L85 PathProgramCache]: Analyzing trace with hash -568589825, now seen corresponding path program 1 times [2022-11-21 16:59:39,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:39,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89819238] [2022-11-21 16:59:39,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:39,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:40,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1501 backedges. 859 proven. 0 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2022-11-21 16:59:40,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:40,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89819238] [2022-11-21 16:59:40,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89819238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:59:40,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:59:40,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:59:40,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011874784] [2022-11-21 16:59:40,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:59:40,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:59:40,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:40,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:59:40,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:59:40,523 INFO L87 Difference]: Start difference. First operand 21917 states and 22519 transitions. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 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 16:59:42,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:42,324 INFO L93 Difference]: Finished difference Result 47734 states and 49018 transitions. [2022-11-21 16:59:42,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:59:42,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 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 900 [2022-11-21 16:59:42,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:42,350 INFO L225 Difference]: With dead ends: 47734 [2022-11-21 16:59:42,350 INFO L226 Difference]: Without dead ends: 25819 [2022-11-21 16:59:42,361 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 16:59:42,362 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 142 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:42,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 492 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-21 16:59:42,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25819 states. [2022-11-21 16:59:42,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25819 to 21615. [2022-11-21 16:59:42,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21615 states, 21614 states have (on average 1.0270657906912186) internal successors, (22199), 21614 states have internal predecessors, (22199), 0 states have call successors, (0), 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 16:59:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21615 states to 21615 states and 22199 transitions. [2022-11-21 16:59:42,598 INFO L78 Accepts]: Start accepts. Automaton has 21615 states and 22199 transitions. Word has length 900 [2022-11-21 16:59:42,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:42,599 INFO L495 AbstractCegarLoop]: Abstraction has 21615 states and 22199 transitions. [2022-11-21 16:59:42,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 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 16:59:42,599 INFO L276 IsEmpty]: Start isEmpty. Operand 21615 states and 22199 transitions. [2022-11-21 16:59:42,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 905 [2022-11-21 16:59:42,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:42,656 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 16:59:42,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-21 16:59:42,656 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:59:42,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:42,657 INFO L85 PathProgramCache]: Analyzing trace with hash 629237515, now seen corresponding path program 1 times [2022-11-21 16:59:42,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:42,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419361766] [2022-11-21 16:59:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:42,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1204 backedges. 711 proven. 269 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-11-21 16:59:44,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:44,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419361766] [2022-11-21 16:59:44,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419361766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:59:44,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673933851] [2022-11-21 16:59:44,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:44,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:44,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:59:44,554 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:59:44,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:59:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:45,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 16:59:45,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:03:24,551 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~a29~0 13))) (or (exists ((v_~a29~0_899 Int)) (let ((.cse0 (* 9 v_~a29~0_899))) (let ((.cse1 (mod (div .cse0 50) 29))) (and (= (mod (div (+ (div .cse0 10) 1) 5) 29) 0) (< 43 v_~a29~0_899) (<= .cse1 .cse2) (= 0 .cse1) (= (mod .cse0 10) 0))))) (exists ((v_~a29~0_899 Int)) (let ((.cse3 (* 9 v_~a29~0_899))) (and (= (mod (div (+ (div .cse3 10) 1) 5) 29) 0) (< 43 v_~a29~0_899) (<= (mod (div .cse3 50) 29) .cse2) (= (mod .cse3 10) 0)))) (exists ((v_~a29~0_899 Int)) (let ((.cse4 (* 9 v_~a29~0_899))) (let ((.cse5 (mod (div .cse4 50) 29))) (and (= (mod (div .cse4 10) 5) 0) (< 43 v_~a29~0_899) (<= .cse5 .cse2) (= 0 .cse5))))) (exists ((v_~a29~0_899 Int)) (let ((.cse8 (* 9 v_~a29~0_899))) (let ((.cse6 (div .cse8 50)) (.cse7 (div (+ (div .cse8 10) 1) 5))) (and (= (mod (+ .cse6 1) 29) 0) (<= (mod .cse6 29) .cse2) (= (mod (+ .cse7 1) 29) 0) (= (mod .cse8 10) 0) (not (< .cse7 0)))))) (exists ((v_~a29~0_899 Int)) (let ((.cse11 (* 9 v_~a29~0_899))) (let ((.cse9 (div .cse11 50)) (.cse10 (div (+ (div .cse11 10) 1) 5))) (and (= (mod (+ .cse9 1) 29) 0) (<= (mod .cse9 29) .cse2) (= (mod (+ .cse10 1) 29) 0) (not (< .cse10 0)))))) (exists ((v_~a29~0_899 Int)) (let ((.cse13 (* 9 v_~a29~0_899))) (let ((.cse12 (div .cse13 50))) (and (= (mod (+ .cse12 1) 29) 0) (<= (mod .cse12 29) .cse2) (not (< (div .cse13 10) 0)) (= (mod .cse13 10) 0))))) (exists ((v_~a29~0_899 Int)) (let ((.cse16 (* 9 v_~a29~0_899))) (let ((.cse15 (div .cse16 50)) (.cse14 (div .cse16 10))) (and (= (mod (div (+ .cse14 1) 5) 29) 0) (= (mod (+ .cse15 1) 29) 0) (<= (mod .cse15 29) .cse2) (not (< .cse14 0)) (= (mod .cse16 10) 0))))) (exists ((v_~a29~0_899 Int)) (let ((.cse17 (* 9 v_~a29~0_899))) (and (< 43 v_~a29~0_899) (<= (mod (div .cse17 50) 29) .cse2) (= (mod .cse17 10) 0)))) (exists ((v_~a29~0_899 Int)) (let ((.cse18 (* 9 v_~a29~0_899))) (let ((.cse19 (div .cse18 50))) (and (= (mod (div .cse18 10) 5) 0) (= (mod (+ .cse19 1) 29) 0) (<= (mod .cse19 29) .cse2) (not (< .cse19 0)))))) (exists ((v_~a29~0_899 Int)) (let ((.cse21 (* 9 v_~a29~0_899))) (let ((.cse20 (mod (div .cse21 50) 29))) (and (< 43 v_~a29~0_899) (<= .cse20 .cse2) (= 0 .cse20) (= (mod .cse21 10) 0))))) (exists ((v_~a29~0_899 Int)) (let ((.cse23 (* 9 v_~a29~0_899))) (let ((.cse22 (div .cse23 50))) (and (<= (mod .cse22 29) .cse2) (= (mod (+ (div (+ (div .cse23 10) 1) 5) 1) 29) 0) (<= 0 .cse22))))) (exists ((v_~a29~0_899 Int)) (let ((.cse25 (* 9 v_~a29~0_899))) (let ((.cse24 (div .cse25 50))) (and (<= (mod .cse24 29) .cse2) (= (mod (+ (div (+ (div .cse25 10) 1) 5) 1) 29) 0) (<= 0 .cse24) (= (mod .cse25 10) 0))))) (exists ((v_~a29~0_899 Int)) (let ((.cse27 (* 9 v_~a29~0_899))) (let ((.cse26 (div .cse27 50))) (and (= (mod (+ .cse26 1) 29) 0) (<= (mod .cse26 29) .cse2) (not (< (div .cse27 10) 0)))))) (exists ((v_~a29~0_899 Int)) (let ((.cse30 (* 9 v_~a29~0_899))) (let ((.cse28 (div .cse30 10)) (.cse29 (div .cse30 50))) (and (= (mod .cse28 5) 0) (<= (mod .cse29 29) .cse2) (= (mod (+ (div (+ .cse28 1) 5) 1) 29) 0) (<= 0 .cse29))))) (exists ((v_~a29~0_899 Int)) (and (< 43 v_~a29~0_899) (<= (mod (div (* 9 v_~a29~0_899) 50) 29) .cse2))) (exists ((v_~a29~0_899 Int)) (let ((.cse31 (* 9 v_~a29~0_899))) (and (= (mod (div (+ (div .cse31 10) 1) 5) 29) 0) (< 43 v_~a29~0_899) (<= (mod (div .cse31 50) 29) .cse2)))) (exists ((v_~a29~0_899 Int)) (let ((.cse32 (* 9 v_~a29~0_899))) (and (= (mod (+ (div (+ (div .cse32 10) 1) 5) 1) 29) 0) (= 0 (mod (div .cse32 50) 29))))) (exists ((v_~a29~0_899 Int)) (let ((.cse33 (mod (div (* 9 v_~a29~0_899) 50) 29))) (and (< 43 v_~a29~0_899) (<= .cse33 .cse2) (= 0 .cse33)))) (exists ((v_~a29~0_899 Int)) (let ((.cse35 (* 9 v_~a29~0_899))) (let ((.cse34 (div .cse35 10))) (and (= (mod .cse34 5) 0) (= (mod (div (+ .cse34 1) 5) 29) 0) (< 43 v_~a29~0_899) (<= (mod (div .cse35 50) 29) .cse2))))) (exists ((v_~a29~0_899 Int)) (let ((.cse37 (* 9 v_~a29~0_899))) (let ((.cse36 (div .cse37 10))) (and (= (mod .cse36 5) 0) (= (mod (div (+ .cse36 1) 5) 29) 0) (< 43 v_~a29~0_899) (<= (mod (div .cse37 50) 29) .cse2) (= (mod .cse37 10) 0))))) (exists ((v_~a29~0_899 Int)) (let ((.cse38 (* 9 v_~a29~0_899))) (let ((.cse39 (mod (div .cse38 50) 29))) (and (= (mod (div .cse38 10) 5) 0) (< 43 v_~a29~0_899) (<= .cse39 .cse2) (= 0 .cse39) (= (mod .cse38 10) 0))))) (exists ((v_~a29~0_899 Int)) (let ((.cse40 (* 9 v_~a29~0_899))) (and (= (mod (div .cse40 10) 5) 0) (< 43 v_~a29~0_899) (<= (mod (div .cse40 50) 29) .cse2)))) (exists ((v_~a29~0_899 Int)) (let ((.cse41 (* 9 v_~a29~0_899))) (let ((.cse42 (div .cse41 50))) (and (= (mod (div .cse41 10) 5) 0) (= (mod (+ .cse42 1) 29) 0) (<= (mod .cse42 29) .cse2) (not (< .cse42 0)) (= (mod .cse41 10) 0))))) (exists ((v_~a29~0_899 Int)) (let ((.cse43 (* 9 v_~a29~0_899))) (and (= (mod (div .cse43 10) 5) 0) (< 43 v_~a29~0_899) (<= (mod (div .cse43 50) 29) .cse2) (= (mod .cse43 10) 0)))) (exists ((v_~a29~0_899 Int)) (let ((.cse46 (* 9 v_~a29~0_899))) (let ((.cse45 (div .cse46 50)) (.cse44 (div .cse46 10))) (and (= (mod (div (+ .cse44 1) 5) 29) 0) (= (mod (+ .cse45 1) 29) 0) (<= (mod .cse45 29) .cse2) (not (< .cse44 0)))))) (exists ((v_~a29~0_899 Int)) (let ((.cse48 (* 9 v_~a29~0_899))) (let ((.cse47 (div .cse48 10))) (let ((.cse49 (div (+ .cse47 1) 5))) (and (= (mod .cse47 5) 0) (<= (mod (div .cse48 50) 29) .cse2) (= (mod (+ .cse49 1) 29) 0) (= (mod .cse48 10) 0) (not (< .cse49 0))))))) (exists ((v_~a29~0_899 Int)) (let ((.cse52 (* 9 v_~a29~0_899))) (let ((.cse51 (div .cse52 50)) (.cse50 (div .cse52 10))) (and (= (mod .cse50 5) 0) (= (mod (+ .cse51 1) 29) 0) (<= (mod .cse51 29) .cse2) (not (< (div (+ .cse50 1) 5) 0)))))) (exists ((v_~a29~0_899 Int)) (let ((.cse55 (* 9 v_~a29~0_899))) (let ((.cse53 (div .cse55 10)) (.cse54 (div .cse55 50))) (and (= (mod .cse53 5) 0) (<= (mod .cse54 29) .cse2) (= (mod (+ (div (+ .cse53 1) 5) 1) 29) 0) (<= 0 .cse54) (= (mod .cse55 10) 0))))) (exists ((v_~a29~0_899 Int)) (let ((.cse56 (* 9 v_~a29~0_899))) (let ((.cse57 (mod (div .cse56 50) 29))) (and (= (mod (div (+ (div .cse56 10) 1) 5) 29) 0) (< 43 v_~a29~0_899) (<= .cse57 .cse2) (= 0 .cse57))))))) is different from true [2022-11-21 17:03:33,611 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~a29~0 13))) (or (exists ((v_~a29~0_899 Int)) (let ((.cse0 (* 9 v_~a29~0_899))) (let ((.cse1 (mod (div .cse0 50) 29))) (and (= (mod (div (+ (div .cse0 10) 1) 5) 29) 0) (< 43 v_~a29~0_899) (<= .cse1 .cse2) (= 0 .cse1) (= (mod .cse0 10) 0))))) (exists ((v_~a29~0_899 Int)) (let ((.cse3 (* 9 v_~a29~0_899))) (and (= (mod (div (+ (div .cse3 10) 1) 5) 29) 0) (< 43 v_~a29~0_899) (<= (mod (div .cse3 50) 29) .cse2) (= (mod .cse3 10) 0)))) (exists ((v_~a29~0_899 Int)) (let ((.cse4 (* 9 v_~a29~0_899))) (let ((.cse5 (mod (div .cse4 50) 29))) (and (= (mod (div .cse4 10) 5) 0) (< 43 v_~a29~0_899) (<= .cse5 .cse2) (= 0 .cse5))))) (exists ((v_~a29~0_899 Int)) (let ((.cse8 (* 9 v_~a29~0_899))) (let ((.cse6 (div .cse8 50)) (.cse7 (div (+ (div .cse8 10) 1) 5))) (and (= (mod (+ .cse6 1) 29) 0) (<= (mod .cse6 29) .cse2) (= (mod (+ .cse7 1) 29) 0) (= (mod .cse8 10) 0) (not (< .cse7 0)))))) (exists ((v_~a29~0_899 Int)) (let ((.cse11 (* 9 v_~a29~0_899))) (let ((.cse9 (div .cse11 50)) (.cse10 (div (+ (div .cse11 10) 1) 5))) (and (= (mod (+ .cse9 1) 29) 0) (<= (mod .cse9 29) .cse2) (= (mod (+ .cse10 1) 29) 0) (not (< .cse10 0)))))) (exists ((v_~a29~0_899 Int)) (let ((.cse13 (* 9 v_~a29~0_899))) (let ((.cse12 (div .cse13 50))) (and (= (mod (+ .cse12 1) 29) 0) (<= (mod .cse12 29) .cse2) (not (< (div .cse13 10) 0)) (= (mod .cse13 10) 0))))) (exists ((v_~a29~0_899 Int)) (let ((.cse16 (* 9 v_~a29~0_899))) (let ((.cse15 (div .cse16 50)) (.cse14 (div .cse16 10))) (and (= (mod (div (+ .cse14 1) 5) 29) 0) (= (mod (+ .cse15 1) 29) 0) (<= (mod .cse15 29) .cse2) (not (< .cse14 0)) (= (mod .cse16 10) 0))))) (exists ((v_~a29~0_899 Int)) (let ((.cse17 (* 9 v_~a29~0_899))) (and (< 43 v_~a29~0_899) (<= (mod (div .cse17 50) 29) .cse2) (= (mod .cse17 10) 0)))) (exists ((v_~a29~0_899 Int)) (let ((.cse18 (* 9 v_~a29~0_899))) (let ((.cse19 (div .cse18 50))) (and (= (mod (div .cse18 10) 5) 0) (= (mod (+ .cse19 1) 29) 0) (<= (mod .cse19 29) .cse2) (not (< .cse19 0)))))) (exists ((v_~a29~0_899 Int)) (let ((.cse21 (* 9 v_~a29~0_899))) (let ((.cse20 (mod (div .cse21 50) 29))) (and (< 43 v_~a29~0_899) (<= .cse20 .cse2) (= 0 .cse20) (= (mod .cse21 10) 0))))) (exists ((v_~a29~0_899 Int)) (let ((.cse23 (* 9 v_~a29~0_899))) (let ((.cse22 (div .cse23 50))) (and (<= (mod .cse22 29) .cse2) (= (mod (+ (div (+ (div .cse23 10) 1) 5) 1) 29) 0) (<= 0 .cse22))))) (exists ((v_~a29~0_899 Int)) (let ((.cse25 (* 9 v_~a29~0_899))) (let ((.cse24 (div .cse25 50))) (and (<= (mod .cse24 29) .cse2) (= (mod (+ (div (+ (div .cse25 10) 1) 5) 1) 29) 0) (<= 0 .cse24) (= (mod .cse25 10) 0))))) (exists ((v_~a29~0_899 Int)) (let ((.cse27 (* 9 v_~a29~0_899))) (let ((.cse26 (div .cse27 50))) (and (= (mod (+ .cse26 1) 29) 0) (<= (mod .cse26 29) .cse2) (not (< (div .cse27 10) 0)))))) (exists ((v_~a29~0_899 Int)) (let ((.cse30 (* 9 v_~a29~0_899))) (let ((.cse28 (div .cse30 10)) (.cse29 (div .cse30 50))) (and (= (mod .cse28 5) 0) (<= (mod .cse29 29) .cse2) (= (mod (+ (div (+ .cse28 1) 5) 1) 29) 0) (<= 0 .cse29))))) (exists ((v_~a29~0_899 Int)) (and (< 43 v_~a29~0_899) (<= (mod (div (* 9 v_~a29~0_899) 50) 29) .cse2))) (exists ((v_~a29~0_899 Int)) (let ((.cse31 (* 9 v_~a29~0_899))) (and (= (mod (div (+ (div .cse31 10) 1) 5) 29) 0) (< 43 v_~a29~0_899) (<= (mod (div .cse31 50) 29) .cse2)))) (exists ((v_~a29~0_899 Int)) (let ((.cse32 (mod (div (* 9 v_~a29~0_899) 50) 29))) (and (< 43 v_~a29~0_899) (<= .cse32 .cse2) (= 0 .cse32)))) (exists ((v_~a29~0_899 Int)) (let ((.cse34 (* 9 v_~a29~0_899))) (let ((.cse33 (div .cse34 10))) (and (= (mod .cse33 5) 0) (= (mod (div (+ .cse33 1) 5) 29) 0) (< 43 v_~a29~0_899) (<= (mod (div .cse34 50) 29) .cse2))))) (exists ((v_~a29~0_899 Int)) (let ((.cse36 (* 9 v_~a29~0_899))) (let ((.cse35 (div .cse36 10))) (and (= (mod .cse35 5) 0) (= (mod (div (+ .cse35 1) 5) 29) 0) (< 43 v_~a29~0_899) (<= (mod (div .cse36 50) 29) .cse2) (= (mod .cse36 10) 0))))) (exists ((v_~a29~0_899 Int)) (let ((.cse37 (* 9 v_~a29~0_899))) (let ((.cse38 (mod (div .cse37 50) 29))) (and (= (mod (div .cse37 10) 5) 0) (< 43 v_~a29~0_899) (<= .cse38 .cse2) (= 0 .cse38) (= (mod .cse37 10) 0))))) (exists ((v_~a29~0_899 Int)) (let ((.cse39 (* 9 v_~a29~0_899))) (and (= (mod (div .cse39 10) 5) 0) (< 43 v_~a29~0_899) (<= (mod (div .cse39 50) 29) .cse2)))) (exists ((v_~a29~0_899 Int)) (let ((.cse40 (* 9 v_~a29~0_899))) (let ((.cse41 (div .cse40 50))) (and (= (mod (div .cse40 10) 5) 0) (= (mod (+ .cse41 1) 29) 0) (<= (mod .cse41 29) .cse2) (not (< .cse41 0)) (= (mod .cse40 10) 0))))) (exists ((v_~a29~0_899 Int)) (let ((.cse42 (* 9 v_~a29~0_899))) (and (= (mod (div .cse42 10) 5) 0) (< 43 v_~a29~0_899) (<= (mod (div .cse42 50) 29) .cse2) (= (mod .cse42 10) 0)))) (exists ((v_~a29~0_899 Int)) (let ((.cse45 (* 9 v_~a29~0_899))) (let ((.cse44 (div .cse45 50)) (.cse43 (div .cse45 10))) (and (= (mod (div (+ .cse43 1) 5) 29) 0) (= (mod (+ .cse44 1) 29) 0) (<= (mod .cse44 29) .cse2) (not (< .cse43 0)))))) (exists ((v_~a29~0_899 Int)) (let ((.cse47 (* 9 v_~a29~0_899))) (let ((.cse46 (div .cse47 10))) (let ((.cse48 (div (+ .cse46 1) 5))) (and (= (mod .cse46 5) 0) (<= (mod (div .cse47 50) 29) .cse2) (= (mod (+ .cse48 1) 29) 0) (= (mod .cse47 10) 0) (not (< .cse48 0))))))) (exists ((v_~a29~0_899 Int)) (let ((.cse51 (* 9 v_~a29~0_899))) (let ((.cse50 (div .cse51 50)) (.cse49 (div .cse51 10))) (and (= (mod .cse49 5) 0) (= (mod (+ .cse50 1) 29) 0) (<= (mod .cse50 29) .cse2) (not (< (div (+ .cse49 1) 5) 0)))))) (exists ((v_~a29~0_899 Int)) (let ((.cse54 (* 9 v_~a29~0_899))) (let ((.cse52 (div .cse54 10)) (.cse53 (div .cse54 50))) (and (= (mod .cse52 5) 0) (<= (mod .cse53 29) .cse2) (= (mod (+ (div (+ .cse52 1) 5) 1) 29) 0) (<= 0 .cse53) (= (mod .cse54 10) 0))))) (exists ((v_~a29~0_899 Int)) (let ((.cse55 (* 9 v_~a29~0_899))) (let ((.cse56 (mod (div .cse55 50) 29))) (and (= (mod (div (+ (div .cse55 10) 1) 5) 29) 0) (< 43 v_~a29~0_899) (<= .cse56 .cse2) (= 0 .cse56))))))) is different from true [2022-11-21 17:10:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1204 backedges. 235 proven. 0 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2022-11-21 17:10:47,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:10:47,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673933851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:10:47,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:10:47,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2022-11-21 17:10:47,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799430268] [2022-11-21 17:10:47,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:10:47,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:10:47,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:47,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:10:47,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=15, Unknown=2, NotChecked=14, Total=42 [2022-11-21 17:10:47,285 INFO L87 Difference]: Start difference. First operand 21615 states and 22199 transitions. Second operand has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:10:47,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:10:47,355 INFO L93 Difference]: Finished difference Result 21676 states and 22260 transitions. [2022-11-21 17:10:47,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 17:10:47,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 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 904 [2022-11-21 17:10:47,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:10:47,370 INFO L225 Difference]: With dead ends: 21676 [2022-11-21 17:10:47,370 INFO L226 Difference]: Without dead ends: 21674 [2022-11-21 17:10:47,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 907 GetRequests, 902 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=11, Invalid=15, Unknown=2, NotChecked=14, Total=42 [2022-11-21 17:10:47,375 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1026 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:10:47,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 487 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 1026 Unchecked, 0.0s Time] [2022-11-21 17:10:47,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21674 states. [2022-11-21 17:10:47,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21674 to 21674. [2022-11-21 17:10:47,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21674 states, 21673 states have (on average 1.026992109998616) internal successors, (22258), 21673 states have internal predecessors, (22258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:10:47,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21674 states to 21674 states and 22258 transitions. [2022-11-21 17:10:47,604 INFO L78 Accepts]: Start accepts. Automaton has 21674 states and 22258 transitions. Word has length 904 [2022-11-21 17:10:47,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:10:47,605 INFO L495 AbstractCegarLoop]: Abstraction has 21674 states and 22258 transitions. [2022-11-21 17:10:47,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:10:47,605 INFO L276 IsEmpty]: Start isEmpty. Operand 21674 states and 22258 transitions. [2022-11-21 17:10:47,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1026 [2022-11-21 17:10:47,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:10:47,618 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, 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, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 17:10:47,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 17:10:47,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:47,825 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:10:47,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:47,826 INFO L85 PathProgramCache]: Analyzing trace with hash -849008212, now seen corresponding path program 1 times [2022-11-21 17:10:47,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:47,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402238714] [2022-11-21 17:10:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:47,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:48,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1775 backedges. 1281 proven. 90 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2022-11-21 17:10:49,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:49,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402238714] [2022-11-21 17:10:49,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402238714] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:10:49,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419408135] [2022-11-21 17:10:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:49,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:49,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:10:49,813 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:10:49,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 17:10:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:50,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 17:10:50,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:10:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1775 backedges. 1188 proven. 399 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-11-21 17:10:51,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:10:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1775 backedges. 933 proven. 0 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-11-21 17:10:51,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419408135] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 17:10:51,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:10:51,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 6] total 10 [2022-11-21 17:10:51,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214974527] [2022-11-21 17:10:51,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:10:51,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:10:51,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:51,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:10:51,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-21 17:10:51,520 INFO L87 Difference]: Start difference. First operand 21674 states and 22258 transitions. Second operand has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:10:53,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:10:53,007 INFO L93 Difference]: Finished difference Result 35227 states and 36081 transitions. [2022-11-21 17:10:53,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 17:10:53,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 0 states have call successors, (0), 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 1025 [2022-11-21 17:10:53,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:10:53,009 INFO L225 Difference]: With dead ends: 35227 [2022-11-21 17:10:53,009 INFO L226 Difference]: Without dead ends: 0 [2022-11-21 17:10:53,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2055 GetRequests, 2047 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-21 17:10:53,018 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 391 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:10:53,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 36 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-21 17:10:53,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-21 17:10:53,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-21 17:10:53,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:10:53,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-21 17:10:53,020 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1025 [2022-11-21 17:10:53,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:10:53,020 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-21 17:10:53,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:10:53,021 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-21 17:10:53,021 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-21 17:10:53,023 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-21 17:10:53,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 17:10:53,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_749854c7-03f9-4dc4-b4dd-4550f333d762/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-21 17:10:53,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-21 17:11:36,096 WARN L233 SmtUtils]: Spent 39.28s on a formula simplification. DAG size of input: 401 DAG size of output: 106 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)