./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label32.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label32.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN --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 d6a56bada7206875b5522c4732ed558727da026e7bf600ff2a0cdce747605d25 --- 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-6b4ec56 [2022-11-20 10:58:00,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:58:00,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:58:00,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:58:00,241 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:58:00,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:58:00,244 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:58:00,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:58:00,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:58:00,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:58:00,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:58:00,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:58:00,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:58:00,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:58:00,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:58:00,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:58:00,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:58:00,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:58:00,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:58:00,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:58:00,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:58:00,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:58:00,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:58:00,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:58:00,272 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:58:00,272 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:58:00,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:58:00,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:58:00,275 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:58:00,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:58:00,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:58:00,277 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:58:00,278 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:58:00,279 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:58:00,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:58:00,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:58:00,282 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:58:00,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:58:00,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:58:00,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:58:00,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:58:00,286 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:58:00,311 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:58:00,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:58:00,312 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:58:00,312 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:58:00,313 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:58:00,313 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:58:00,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:58:00,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:58:00,315 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:58:00,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:58:00,316 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:58:00,316 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:58:00,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:58:00,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:58:00,316 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:58:00,317 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:58:00,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:58:00,317 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:58:00,317 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:58:00,317 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:58:00,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:58:00,318 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:58:00,318 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:58:00,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:58:00,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:58:00,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:58:00,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:58:00,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:58:00,319 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:58:00,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:58:00,320 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:58:00,320 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:58:00,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:58:00,320 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_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6a56bada7206875b5522c4732ed558727da026e7bf600ff2a0cdce747605d25 [2022-11-20 10:58:00,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:58:00,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:58:00,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:58:00,656 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:58:00,657 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:58:00,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/eca-rers2012/Problem12_label32.c [2022-11-20 10:58:03,766 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:58:04,255 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:58:04,255 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/sv-benchmarks/c/eca-rers2012/Problem12_label32.c [2022-11-20 10:58:04,283 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/data/8030108ed/890a0887c74e48388ed8bfb456c92ffe/FLAG7391166c4 [2022-11-20 10:58:04,305 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/data/8030108ed/890a0887c74e48388ed8bfb456c92ffe [2022-11-20 10:58:04,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:58:04,315 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:58:04,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:58:04,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:58:04,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:58:04,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:58:04" (1/1) ... [2022-11-20 10:58:04,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47307858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:04, skipping insertion in model container [2022-11-20 10:58:04,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:58:04" (1/1) ... [2022-11-20 10:58:04,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:58:04,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:58:04,697 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_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/sv-benchmarks/c/eca-rers2012/Problem12_label32.c[5470,5483] [2022-11-20 10:58:05,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:58:05,827 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:58:05,860 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_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/sv-benchmarks/c/eca-rers2012/Problem12_label32.c[5470,5483] [2022-11-20 10:58:06,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:58:06,442 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:58:06,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:06 WrapperNode [2022-11-20 10:58:06,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:58:06,444 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:58:06,444 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:58:06,444 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:58:06,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:06" (1/1) ... [2022-11-20 10:58:06,512 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:06" (1/1) ... [2022-11-20 10:58:06,901 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2022-11-20 10:58:06,901 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:58:06,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:58:06,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:58:06,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:58:06,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:06" (1/1) ... [2022-11-20 10:58:06,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:06" (1/1) ... [2022-11-20 10:58:06,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:06" (1/1) ... [2022-11-20 10:58:06,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:06" (1/1) ... [2022-11-20 10:58:07,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:06" (1/1) ... [2022-11-20 10:58:07,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:06" (1/1) ... [2022-11-20 10:58:07,315 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:06" (1/1) ... [2022-11-20 10:58:07,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:06" (1/1) ... [2022-11-20 10:58:07,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:58:07,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:58:07,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:58:07,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:58:07,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:06" (1/1) ... [2022-11-20 10:58:07,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:58:07,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:58:07,452 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:58:07,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:58:07,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:58:07,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:58:07,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:58:07,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:58:07,613 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:58:07,615 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:58:12,770 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:58:12,784 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:58:12,784 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 10:58:12,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:58:12 BoogieIcfgContainer [2022-11-20 10:58:12,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:58:12,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:58:12,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:58:12,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:58:12,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:58:04" (1/3) ... [2022-11-20 10:58:12,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257f7117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:58:12, skipping insertion in model container [2022-11-20 10:58:12,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:06" (2/3) ... [2022-11-20 10:58:12,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257f7117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:58:12, skipping insertion in model container [2022-11-20 10:58:12,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:58:12" (3/3) ... [2022-11-20 10:58:12,797 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label32.c [2022-11-20 10:58:12,823 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:58:12,824 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:58:12,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:58:12,927 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;@4c71f818, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:58:12,928 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 10:58:12,937 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:12,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 10:58:12,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:12,950 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] [2022-11-20 10:58:12,951 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:58:12,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:12,959 INFO L85 PathProgramCache]: Analyzing trace with hash 712930081, now seen corresponding path program 1 times [2022-11-20 10:58:12,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:12,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135345011] [2022-11-20 10:58:12,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:12,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:13,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:58:13,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135345011] [2022-11-20 10:58:13,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135345011] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:58:13,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:58:13,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:58:13,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668027632] [2022-11-20 10:58:13,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:58:13,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:58:13,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:13,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:58:13,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:58:13,422 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:18,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:18,532 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2022-11-20 10:58:18,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:58:18,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2022-11-20 10:58:18,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:18,557 INFO L225 Difference]: With dead ends: 2388 [2022-11-20 10:58:18,557 INFO L226 Difference]: Without dead ends: 1506 [2022-11-20 10:58:18,564 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 [2022-11-20 10:58:18,567 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 793 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 764 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 3264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 764 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:18,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 112 Invalid, 3264 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [764 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-20 10:58:18,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-11-20 10:58:18,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2022-11-20 10:58:18,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.86578073089701) internal successors, (2808), 1505 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:18,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2808 transitions. [2022-11-20 10:58:18,673 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2808 transitions. Word has length 43 [2022-11-20 10:58:18,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:18,674 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2808 transitions. [2022-11-20 10:58:18,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:18,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2808 transitions. [2022-11-20 10:58:18,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-20 10:58:18,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:18,678 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:18,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:58:18,679 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:58:18,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:18,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1973974140, now seen corresponding path program 1 times [2022-11-20 10:58:18,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:18,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876215294] [2022-11-20 10:58:18,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:18,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:19,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:58:19,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876215294] [2022-11-20 10:58:19,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876215294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:58:19,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:58:19,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:58:19,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411731639] [2022-11-20 10:58:19,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:58:19,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:58:19,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:19,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:58:19,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:58:19,147 INFO L87 Difference]: Start difference. First operand 1506 states and 2808 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:26,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:26,411 INFO L93 Difference]: Finished difference Result 5271 states and 9796 transitions. [2022-11-20 10:58:26,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:58:26,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 108 [2022-11-20 10:58:26,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:26,429 INFO L225 Difference]: With dead ends: 5271 [2022-11-20 10:58:26,429 INFO L226 Difference]: Without dead ends: 3767 [2022-11-20 10:58:26,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:58:26,443 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 2312 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3612 mSolverCounterSat, 1529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2312 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 5141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1529 IncrementalHoareTripleChecker+Valid, 3612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:26,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2312 Valid, 197 Invalid, 5141 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1529 Valid, 3612 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-11-20 10:58:26,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3767 states. [2022-11-20 10:58:26,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3767 to 3759. [2022-11-20 10:58:26,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.6056412985630655) internal successors, (6034), 3758 states have internal predecessors, (6034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:26,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 6034 transitions. [2022-11-20 10:58:26,544 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 6034 transitions. Word has length 108 [2022-11-20 10:58:26,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:26,550 INFO L495 AbstractCegarLoop]: Abstraction has 3759 states and 6034 transitions. [2022-11-20 10:58:26,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:26,551 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 6034 transitions. [2022-11-20 10:58:26,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-20 10:58:26,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:26,562 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:26,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:58:26,563 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:58:26,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:26,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1709599411, now seen corresponding path program 1 times [2022-11-20 10:58:26,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:26,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45293826] [2022-11-20 10:58:26,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:26,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:26,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:58:26,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45293826] [2022-11-20 10:58:26,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45293826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:58:26,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:58:26,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:58:26,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047155025] [2022-11-20 10:58:26,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:58:26,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:58:26,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:26,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:58:26,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:58:26,956 INFO L87 Difference]: Start difference. First operand 3759 states and 6034 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:32,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:32,516 INFO L93 Difference]: Finished difference Result 10557 states and 17377 transitions. [2022-11-20 10:58:32,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:58:32,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 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 114 [2022-11-20 10:58:32,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:32,550 INFO L225 Difference]: With dead ends: 10557 [2022-11-20 10:58:32,550 INFO L226 Difference]: Without dead ends: 6763 [2022-11-20 10:58:32,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:58:32,565 INFO L413 NwaCegarLoop]: 694 mSDtfsCounter, 690 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3804 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 4468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 3804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:32,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 712 Invalid, 4468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 3804 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-20 10:58:32,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2022-11-20 10:58:32,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763. [2022-11-20 10:58:32,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 1.3571428571428572) internal successors, (9177), 6762 states have internal predecessors, (9177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:32,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 9177 transitions. [2022-11-20 10:58:32,717 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 9177 transitions. Word has length 114 [2022-11-20 10:58:32,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:32,719 INFO L495 AbstractCegarLoop]: Abstraction has 6763 states and 9177 transitions. [2022-11-20 10:58:32,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:32,720 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 9177 transitions. [2022-11-20 10:58:32,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-20 10:58:32,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:32,728 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:32,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:58:32,729 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:58:32,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:32,730 INFO L85 PathProgramCache]: Analyzing trace with hash 37444428, now seen corresponding path program 1 times [2022-11-20 10:58:32,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:32,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279337261] [2022-11-20 10:58:32,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:32,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:33,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:58:33,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279337261] [2022-11-20 10:58:33,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279337261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:58:33,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783974168] [2022-11-20 10:58:33,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:33,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:58:33,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:58:33,346 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:58:33,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:58:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:33,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:58:33,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 10:58:33,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:58:33,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783974168] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:58:33,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:58:33,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-20 10:58:33,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977144565] [2022-11-20 10:58:33,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:58:33,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:58:33,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:33,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:58:33,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:58:33,818 INFO L87 Difference]: Start difference. First operand 6763 states and 9177 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:37,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:37,954 INFO L93 Difference]: Finished difference Result 18030 states and 25115 transitions. [2022-11-20 10:58:37,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:58:37,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 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 188 [2022-11-20 10:58:37,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:38,005 INFO L225 Difference]: With dead ends: 18030 [2022-11-20 10:58:38,006 INFO L226 Difference]: Without dead ends: 11269 [2022-11-20 10:58:38,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:58:38,023 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 689 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2361 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 3015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 2361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:38,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 242 Invalid, 3015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 2361 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-20 10:58:38,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11269 states. [2022-11-20 10:58:38,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11269 to 9767. [2022-11-20 10:58:38,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.4348761007577309) internal successors, (14013), 9766 states have internal predecessors, (14013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:38,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 14013 transitions. [2022-11-20 10:58:38,279 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 14013 transitions. Word has length 188 [2022-11-20 10:58:38,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:38,280 INFO L495 AbstractCegarLoop]: Abstraction has 9767 states and 14013 transitions. [2022-11-20 10:58:38,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:38,281 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 14013 transitions. [2022-11-20 10:58:38,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-11-20 10:58:38,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:38,287 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:38,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:58:38,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:58:38,493 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:58:38,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:38,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1188783154, now seen corresponding path program 1 times [2022-11-20 10:58:38,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:38,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447394598] [2022-11-20 10:58:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:38,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:39,021 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-20 10:58:39,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:58:39,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447394598] [2022-11-20 10:58:39,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447394598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:58:39,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:58:39,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:58:39,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840561821] [2022-11-20 10:58:39,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:58:39,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:58:39,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:39,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:58:39,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:58:39,025 INFO L87 Difference]: Start difference. First operand 9767 states and 14013 transitions. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:44,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:44,158 INFO L93 Difference]: Finished difference Result 25579 states and 38024 transitions. [2022-11-20 10:58:44,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:58:44,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 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 255 [2022-11-20 10:58:44,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:44,201 INFO L225 Difference]: With dead ends: 25579 [2022-11-20 10:58:44,201 INFO L226 Difference]: Without dead ends: 15777 [2022-11-20 10:58:44,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:58:44,213 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 776 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3813 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 4355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 3813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:44,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 402 Invalid, 4355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 3813 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-20 10:58:44,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15777 states. [2022-11-20 10:58:44,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15777 to 14273. [2022-11-20 10:58:44,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14273 states, 14272 states have (on average 1.389784192825112) internal successors, (19835), 14272 states have internal predecessors, (19835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:44,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 19835 transitions. [2022-11-20 10:58:44,479 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 19835 transitions. Word has length 255 [2022-11-20 10:58:44,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:44,480 INFO L495 AbstractCegarLoop]: Abstraction has 14273 states and 19835 transitions. [2022-11-20 10:58:44,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:44,481 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 19835 transitions. [2022-11-20 10:58:44,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-11-20 10:58:44,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:44,486 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 10:58:44,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 10:58:44,486 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:58:44,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:44,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1755489975, now seen corresponding path program 1 times [2022-11-20 10:58:44,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:44,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702127996] [2022-11-20 10:58:44,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:44,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:44,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-20 10:58:44,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:58:44,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702127996] [2022-11-20 10:58:44,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702127996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:58:44,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:58:44,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:58:44,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767127560] [2022-11-20 10:58:44,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:58:44,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:58:44,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:44,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:58:44,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:58:44,760 INFO L87 Difference]: Start difference. First operand 14273 states and 19835 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:48,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:48,692 INFO L93 Difference]: Finished difference Result 36054 states and 50017 transitions. [2022-11-20 10:58:48,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:58:48,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 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 277 [2022-11-20 10:58:48,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:48,734 INFO L225 Difference]: With dead ends: 36054 [2022-11-20 10:58:48,735 INFO L226 Difference]: Without dead ends: 21783 [2022-11-20 10:58:48,750 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 [2022-11-20 10:58:48,751 INFO L413 NwaCegarLoop]: 416 mSDtfsCounter, 694 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1967 mSolverCounterSat, 782 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 2749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 782 IncrementalHoareTripleChecker+Valid, 1967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:48,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 422 Invalid, 2749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [782 Valid, 1967 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-20 10:58:48,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21783 states. [2022-11-20 10:58:49,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21783 to 18779. [2022-11-20 10:58:49,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18779 states, 18778 states have (on average 1.2279262967302162) internal successors, (23058), 18778 states have internal predecessors, (23058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:49,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18779 states to 18779 states and 23058 transitions. [2022-11-20 10:58:49,049 INFO L78 Accepts]: Start accepts. Automaton has 18779 states and 23058 transitions. Word has length 277 [2022-11-20 10:58:49,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:49,049 INFO L495 AbstractCegarLoop]: Abstraction has 18779 states and 23058 transitions. [2022-11-20 10:58:49,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:49,050 INFO L276 IsEmpty]: Start isEmpty. Operand 18779 states and 23058 transitions. [2022-11-20 10:58:49,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-11-20 10:58:49,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:49,058 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:49,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 10:58:49,059 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:58:49,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:49,059 INFO L85 PathProgramCache]: Analyzing trace with hash 2041064325, now seen corresponding path program 1 times [2022-11-20 10:58:49,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:49,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790652765] [2022-11-20 10:58:49,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:49,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:49,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 293 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-20 10:58:49,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:58:49,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790652765] [2022-11-20 10:58:49,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790652765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:58:49,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:58:49,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:58:49,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598523872] [2022-11-20 10:58:49,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:58:49,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:58:49,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:49,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:58:49,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:58:49,890 INFO L87 Difference]: Start difference. First operand 18779 states and 23058 transitions. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:53,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:53,874 INFO L93 Difference]: Finished difference Result 45817 states and 57283 transitions. [2022-11-20 10:58:53,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:58:53,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 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 356 [2022-11-20 10:58:53,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:53,940 INFO L225 Difference]: With dead ends: 45817 [2022-11-20 10:58:53,941 INFO L226 Difference]: Without dead ends: 27040 [2022-11-20 10:58:53,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:58:53,959 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 780 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2166 mSolverCounterSat, 840 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 3006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 840 IncrementalHoareTripleChecker+Valid, 2166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:53,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 105 Invalid, 3006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [840 Valid, 2166 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-20 10:58:53,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27040 states. [2022-11-20 10:58:54,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27040 to 27040. [2022-11-20 10:58:54,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27040 states, 27039 states have (on average 1.243463145826399) internal successors, (33622), 27039 states have internal predecessors, (33622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:54,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27040 states to 27040 states and 33622 transitions. [2022-11-20 10:58:54,406 INFO L78 Accepts]: Start accepts. Automaton has 27040 states and 33622 transitions. Word has length 356 [2022-11-20 10:58:54,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:54,406 INFO L495 AbstractCegarLoop]: Abstraction has 27040 states and 33622 transitions. [2022-11-20 10:58:54,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:54,407 INFO L276 IsEmpty]: Start isEmpty. Operand 27040 states and 33622 transitions. [2022-11-20 10:58:54,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2022-11-20 10:58:54,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:54,416 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 10:58:54,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 10:58:54,416 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:58:54,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:54,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1545703729, now seen corresponding path program 1 times [2022-11-20 10:58:54,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:54,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440782164] [2022-11-20 10:58:54,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:54,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:54,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 122 proven. 108 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-20 10:58:54,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:58:54,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440782164] [2022-11-20 10:58:54,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440782164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:58:54,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867437805] [2022-11-20 10:58:54,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:54,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:58:54,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:58:54,996 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:58:55,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:58:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:55,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:58:55,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 297 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-20 10:58:55,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:58:55,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867437805] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:58:55,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:58:55,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-20 10:58:55,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505021686] [2022-11-20 10:58:55,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:58:55,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:58:55,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:55,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:58:55,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:58:55,368 INFO L87 Difference]: Start difference. First operand 27040 states and 33622 transitions. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:59,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:59,011 INFO L93 Difference]: Finished difference Result 61588 states and 77003 transitions. [2022-11-20 10:58:59,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:58:59,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 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 360 [2022-11-20 10:58:59,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:59,088 INFO L225 Difference]: With dead ends: 61588 [2022-11-20 10:58:59,088 INFO L226 Difference]: Without dead ends: 34550 [2022-11-20 10:58:59,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:58:59,109 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 761 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2067 mSolverCounterSat, 728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 728 IncrementalHoareTripleChecker+Valid, 2067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:59,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [761 Valid, 235 Invalid, 2795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [728 Valid, 2067 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-20 10:58:59,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34550 states. [2022-11-20 10:58:59,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34550 to 34550. [2022-11-20 10:58:59,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34550 states, 34549 states have (on average 1.2338707343193724) internal successors, (42629), 34549 states have internal predecessors, (42629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:59,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34550 states to 34550 states and 42629 transitions. [2022-11-20 10:58:59,587 INFO L78 Accepts]: Start accepts. Automaton has 34550 states and 42629 transitions. Word has length 360 [2022-11-20 10:58:59,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:59,588 INFO L495 AbstractCegarLoop]: Abstraction has 34550 states and 42629 transitions. [2022-11-20 10:58:59,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:59,589 INFO L276 IsEmpty]: Start isEmpty. Operand 34550 states and 42629 transitions. [2022-11-20 10:58:59,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-11-20 10:58:59,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:59,598 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:59,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:58:59,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:58:59,900 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:58:59,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:59,901 INFO L85 PathProgramCache]: Analyzing trace with hash -671244681, now seen corresponding path program 1 times [2022-11-20 10:58:59,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:59,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797227201] [2022-11-20 10:58:59,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:59,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-20 10:59:00,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:00,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797227201] [2022-11-20 10:59:00,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797227201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:59:00,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:59:00,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:59:00,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298654839] [2022-11-20 10:59:00,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:59:00,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:59:00,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:00,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:59:00,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:59:00,209 INFO L87 Difference]: Start difference. First operand 34550 states and 42629 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:04,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:04,199 INFO L93 Difference]: Finished difference Result 85620 states and 105162 transitions. [2022-11-20 10:59:04,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:59:04,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 371 [2022-11-20 10:59:04,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:04,279 INFO L225 Difference]: With dead ends: 85620 [2022-11-20 10:59:04,280 INFO L226 Difference]: Without dead ends: 51072 [2022-11-20 10:59:04,308 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 [2022-11-20 10:59:04,311 INFO L413 NwaCegarLoop]: 1352 mSDtfsCounter, 728 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2181 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 2703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 2181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:04,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 1360 Invalid, 2703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 2181 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-20 10:59:04,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51072 states. [2022-11-20 10:59:05,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51072 to 49570. [2022-11-20 10:59:05,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49570 states, 49569 states have (on average 1.1941737779660675) internal successors, (59194), 49569 states have internal predecessors, (59194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:05,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49570 states to 49570 states and 59194 transitions. [2022-11-20 10:59:05,199 INFO L78 Accepts]: Start accepts. Automaton has 49570 states and 59194 transitions. Word has length 371 [2022-11-20 10:59:05,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:05,200 INFO L495 AbstractCegarLoop]: Abstraction has 49570 states and 59194 transitions. [2022-11-20 10:59:05,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:05,201 INFO L276 IsEmpty]: Start isEmpty. Operand 49570 states and 59194 transitions. [2022-11-20 10:59:05,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2022-11-20 10:59:05,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:05,210 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, 4, 4, 4, 4, 4, 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, 2, 2, 2, 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] [2022-11-20 10:59:05,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 10:59:05,211 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:05,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:05,211 INFO L85 PathProgramCache]: Analyzing trace with hash -564373778, now seen corresponding path program 1 times [2022-11-20 10:59:05,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:05,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110668429] [2022-11-20 10:59:05,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:05,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 513 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-20 10:59:05,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:05,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110668429] [2022-11-20 10:59:05,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110668429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:59:05,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:59:05,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:59:05,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523435852] [2022-11-20 10:59:05,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:59:05,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:59:05,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:05,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:59:05,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:59:05,632 INFO L87 Difference]: Start difference. First operand 49570 states and 59194 transitions. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:10,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:10,362 INFO L93 Difference]: Finished difference Result 120917 states and 144542 transitions. [2022-11-20 10:59:10,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:59:10,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 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 460 [2022-11-20 10:59:10,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:10,464 INFO L225 Difference]: With dead ends: 120917 [2022-11-20 10:59:10,464 INFO L226 Difference]: Without dead ends: 71349 [2022-11-20 10:59:10,497 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 [2022-11-20 10:59:10,498 INFO L413 NwaCegarLoop]: 1309 mSDtfsCounter, 639 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2667 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 2979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 2667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:10,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 1317 Invalid, 2979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 2667 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-20 10:59:10,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71349 states. [2022-11-20 10:59:11,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71349 to 70598. [2022-11-20 10:59:11,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70598 states, 70597 states have (on average 1.1828831253452696) internal successors, (83508), 70597 states have internal predecessors, (83508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:11,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70598 states to 70598 states and 83508 transitions. [2022-11-20 10:59:11,501 INFO L78 Accepts]: Start accepts. Automaton has 70598 states and 83508 transitions. Word has length 460 [2022-11-20 10:59:11,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:11,502 INFO L495 AbstractCegarLoop]: Abstraction has 70598 states and 83508 transitions. [2022-11-20 10:59:11,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:11,502 INFO L276 IsEmpty]: Start isEmpty. Operand 70598 states and 83508 transitions. [2022-11-20 10:59:11,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2022-11-20 10:59:11,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:11,516 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, 4, 4, 4, 4, 4, 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, 2, 2, 2, 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] [2022-11-20 10:59:11,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 10:59:11,516 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:11,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:11,517 INFO L85 PathProgramCache]: Analyzing trace with hash -877459784, now seen corresponding path program 1 times [2022-11-20 10:59:11,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:11,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833808399] [2022-11-20 10:59:11,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:11,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 411 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-20 10:59:12,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:12,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833808399] [2022-11-20 10:59:12,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833808399] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:59:12,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:59:12,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:59:12,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924375365] [2022-11-20 10:59:12,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:59:12,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:59:12,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:12,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:59:12,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:59:12,254 INFO L87 Difference]: Start difference. First operand 70598 states and 83508 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:16,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:16,714 INFO L93 Difference]: Finished difference Result 144949 states and 170856 transitions. [2022-11-20 10:59:16,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:59:16,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 464 [2022-11-20 10:59:16,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:16,789 INFO L225 Difference]: With dead ends: 144949 [2022-11-20 10:59:16,789 INFO L226 Difference]: Without dead ends: 69847 [2022-11-20 10:59:16,825 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 [2022-11-20 10:59:16,826 INFO L413 NwaCegarLoop]: 1209 mSDtfsCounter, 725 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2158 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 2708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 2158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:16,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 1217 Invalid, 2708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 2158 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-20 10:59:16,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69847 states. [2022-11-20 10:59:17,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69847 to 62337. [2022-11-20 10:59:17,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62337 states, 62336 states have (on average 1.1272458932238194) internal successors, (70268), 62336 states have internal predecessors, (70268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:17,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62337 states to 62337 states and 70268 transitions. [2022-11-20 10:59:17,722 INFO L78 Accepts]: Start accepts. Automaton has 62337 states and 70268 transitions. Word has length 464 [2022-11-20 10:59:17,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:17,724 INFO L495 AbstractCegarLoop]: Abstraction has 62337 states and 70268 transitions. [2022-11-20 10:59:17,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:17,724 INFO L276 IsEmpty]: Start isEmpty. Operand 62337 states and 70268 transitions. [2022-11-20 10:59:17,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-11-20 10:59:17,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:17,743 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 10:59:17,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 10:59:17,743 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:17,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:17,744 INFO L85 PathProgramCache]: Analyzing trace with hash 598408123, now seen corresponding path program 1 times [2022-11-20 10:59:17,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:17,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251360744] [2022-11-20 10:59:17,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:17,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 408 proven. 108 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-11-20 10:59:19,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:19,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251360744] [2022-11-20 10:59:19,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251360744] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:19,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662724591] [2022-11-20 10:59:19,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:19,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:19,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:59:19,447 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:59:19,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:59:19,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:19,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:59:19,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 449 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-11-20 10:59:19,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:59:19,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662724591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:59:19,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:59:19,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-20 10:59:19,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348695117] [2022-11-20 10:59:19,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:59:19,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:59:19,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:19,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:59:19,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:59:19,863 INFO L87 Difference]: Start difference. First operand 62337 states and 70268 transitions. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:23,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:23,969 INFO L93 Difference]: Finished difference Result 123921 states and 139778 transitions. [2022-11-20 10:59:23,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:59:23,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 530 [2022-11-20 10:59:23,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:24,024 INFO L225 Difference]: With dead ends: 123921 [2022-11-20 10:59:24,024 INFO L226 Difference]: Without dead ends: 62337 [2022-11-20 10:59:24,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:59:24,037 INFO L413 NwaCegarLoop]: 1294 mSDtfsCounter, 685 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:24,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 1302 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 2082 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-20 10:59:24,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62337 states. [2022-11-20 10:59:24,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62337 to 60084. [2022-11-20 10:59:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60084 states, 60083 states have (on average 1.0938368590117005) internal successors, (65721), 60083 states have internal predecessors, (65721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:24,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60084 states to 60084 states and 65721 transitions. [2022-11-20 10:59:24,727 INFO L78 Accepts]: Start accepts. Automaton has 60084 states and 65721 transitions. Word has length 530 [2022-11-20 10:59:24,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:24,727 INFO L495 AbstractCegarLoop]: Abstraction has 60084 states and 65721 transitions. [2022-11-20 10:59:24,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:24,728 INFO L276 IsEmpty]: Start isEmpty. Operand 60084 states and 65721 transitions. [2022-11-20 10:59:24,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2022-11-20 10:59:24,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:24,749 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:24,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:59:24,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0147ce-24bb-4217-880b-77dbe0ebfa6d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:24,956 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:24,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:24,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1299614349, now seen corresponding path program 1 times [2022-11-20 10:59:24,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:24,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909463515] [2022-11-20 10:59:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:24,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:26,598 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-11-20 10:59:26,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:26,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909463515] [2022-11-20 10:59:26,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909463515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:59:26,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:59:26,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:59:26,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481959157] [2022-11-20 10:59:26,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:59:26,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:59:26,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:26,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:59:26,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:59:26,602 INFO L87 Difference]: Start difference. First operand 60084 states and 65721 transitions. Second operand has 4 states, 4 states have (on average 93.5) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:33,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:33,481 INFO L93 Difference]: Finished difference Result 180997 states and 199293 transitions. [2022-11-20 10:59:33,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:59:33,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 93.5) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 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 611 [2022-11-20 10:59:33,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:33,638 INFO L225 Difference]: With dead ends: 180997 [2022-11-20 10:59:33,638 INFO L226 Difference]: Without dead ends: 121666 [2022-11-20 10:59:33,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:59:33,662 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 1693 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 4642 mSolverCounterSat, 574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1693 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 5216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 4642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:33,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1693 Valid, 57 Invalid, 5216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [574 Valid, 4642 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-20 10:59:33,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121666 states. [2022-11-20 10:59:35,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121666 to 120915. [2022-11-20 10:59:35,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120915 states, 120914 states have (on average 1.0979125659559688) internal successors, (132753), 120914 states have internal predecessors, (132753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:35,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120915 states to 120915 states and 132753 transitions. [2022-11-20 10:59:35,290 INFO L78 Accepts]: Start accepts. Automaton has 120915 states and 132753 transitions. Word has length 611 [2022-11-20 10:59:35,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:35,291 INFO L495 AbstractCegarLoop]: Abstraction has 120915 states and 132753 transitions. [2022-11-20 10:59:35,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.5) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:35,291 INFO L276 IsEmpty]: Start isEmpty. Operand 120915 states and 132753 transitions. [2022-11-20 10:59:35,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2022-11-20 10:59:35,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:35,318 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 10:59:35,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 10:59:35,318 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:35,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:35,319 INFO L85 PathProgramCache]: Analyzing trace with hash -784186689, now seen corresponding path program 1 times [2022-11-20 10:59:35,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:35,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326413661] [2022-11-20 10:59:35,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:35,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:35,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 562 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-20 10:59:36,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:36,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326413661] [2022-11-20 10:59:36,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326413661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:59:36,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:59:36,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:59:36,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282918388] [2022-11-20 10:59:36,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:59:36,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:59:36,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:36,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:59:36,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:59:36,314 INFO L87 Difference]: Start difference. First operand 120915 states and 132753 transitions. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:40,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:40,966 INFO L93 Difference]: Finished difference Result 244081 states and 267793 transitions. [2022-11-20 10:59:40,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:59:40,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 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 618 [2022-11-20 10:59:40,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:41,117 INFO L225 Difference]: With dead ends: 244081 [2022-11-20 10:59:41,117 INFO L226 Difference]: Without dead ends: 123919 [2022-11-20 10:59:41,165 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 [2022-11-20 10:59:41,166 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 735 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2240 mSolverCounterSat, 678 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 678 IncrementalHoareTripleChecker+Valid, 2240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:41,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 162 Invalid, 2918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [678 Valid, 2240 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-20 10:59:41,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123919 states. [2022-11-20 10:59:42,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123919 to 120915. [2022-11-20 10:59:42,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120915 states, 120914 states have (on average 1.0912053194832692) internal successors, (131942), 120914 states have internal predecessors, (131942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:42,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120915 states to 120915 states and 131942 transitions. [2022-11-20 10:59:42,992 INFO L78 Accepts]: Start accepts. Automaton has 120915 states and 131942 transitions. Word has length 618 [2022-11-20 10:59:42,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:42,993 INFO L495 AbstractCegarLoop]: Abstraction has 120915 states and 131942 transitions. [2022-11-20 10:59:42,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:42,993 INFO L276 IsEmpty]: Start isEmpty. Operand 120915 states and 131942 transitions. [2022-11-20 10:59:43,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 657 [2022-11-20 10:59:43,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:43,012 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 10:59:43,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 10:59:43,013 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:43,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:43,013 INFO L85 PathProgramCache]: Analyzing trace with hash -18168460, now seen corresponding path program 1 times [2022-11-20 10:59:43,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:43,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205870007] [2022-11-20 10:59:43,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:43,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 567 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-11-20 10:59:43,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:43,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205870007] [2022-11-20 10:59:43,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205870007] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:59:43,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:59:43,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:59:43,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625446258] [2022-11-20 10:59:43,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:59:43,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:59:43,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:43,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:59:43,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:59:43,807 INFO L87 Difference]: Start difference. First operand 120915 states and 131942 transitions. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:49,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:49,043 INFO L93 Difference]: Finished difference Result 319181 states and 347935 transitions. [2022-11-20 10:59:49,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:59:49,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 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 656 [2022-11-20 10:59:49,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:49,316 INFO L225 Difference]: With dead ends: 319181 [2022-11-20 10:59:49,317 INFO L226 Difference]: Without dead ends: 199019 [2022-11-20 10:59:49,365 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 [2022-11-20 10:59:49,366 INFO L413 NwaCegarLoop]: 1269 mSDtfsCounter, 484 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 2799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 488 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:49,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 1276 Invalid, 2799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [488 Valid, 2311 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-20 10:59:49,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199019 states. [2022-11-20 10:59:51,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199019 to 177991. [2022-11-20 10:59:51,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177991 states, 177990 states have (on average 1.0754649137592) internal successors, (191422), 177990 states have internal predecessors, (191422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:51,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177991 states to 177991 states and 191422 transitions. [2022-11-20 10:59:51,779 INFO L78 Accepts]: Start accepts. Automaton has 177991 states and 191422 transitions. Word has length 656 [2022-11-20 10:59:51,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:51,780 INFO L495 AbstractCegarLoop]: Abstraction has 177991 states and 191422 transitions. [2022-11-20 10:59:51,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:51,780 INFO L276 IsEmpty]: Start isEmpty. Operand 177991 states and 191422 transitions. [2022-11-20 10:59:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2022-11-20 10:59:51,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:51,818 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:51,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 10:59:51,818 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:51,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:51,819 INFO L85 PathProgramCache]: Analyzing trace with hash -728818711, now seen corresponding path program 1 times [2022-11-20 10:59:51,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:51,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260913907] [2022-11-20 10:59:51,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:51,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 694 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-11-20 10:59:52,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:52,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260913907] [2022-11-20 10:59:52,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260913907] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:59:52,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:59:52,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:59:52,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161959690] [2022-11-20 10:59:52,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:59:52,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:59:52,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:52,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:59:52,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:59:52,973 INFO L87 Difference]: Start difference. First operand 177991 states and 191422 transitions. Second operand has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:57,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:57,951 INFO L93 Difference]: Finished difference Result 355229 states and 382086 transitions. [2022-11-20 10:59:57,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:59:57,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 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 772 [2022-11-20 10:59:57,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:58,576 INFO L225 Difference]: With dead ends: 355229 [2022-11-20 10:59:58,576 INFO L226 Difference]: Without dead ends: 177991 [2022-11-20 10:59:58,676 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 [2022-11-20 10:59:58,677 INFO L413 NwaCegarLoop]: 1254 mSDtfsCounter, 405 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2214 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 2553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 2214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:58,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 1262 Invalid, 2553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 2214 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-20 10:59:58,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177991 states. [2022-11-20 11:00:00,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177991 to 173485. [2022-11-20 11:00:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173485 states, 173484 states have (on average 1.0592965345507366) internal successors, (183771), 173484 states have internal predecessors, (183771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:01,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173485 states to 173485 states and 183771 transitions. [2022-11-20 11:00:01,094 INFO L78 Accepts]: Start accepts. Automaton has 173485 states and 183771 transitions. Word has length 772 [2022-11-20 11:00:01,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:00:01,094 INFO L495 AbstractCegarLoop]: Abstraction has 173485 states and 183771 transitions. [2022-11-20 11:00:01,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:01,095 INFO L276 IsEmpty]: Start isEmpty. Operand 173485 states and 183771 transitions. [2022-11-20 11:00:01,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 805 [2022-11-20 11:00:01,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:00:01,138 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:00:01,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 11:00:01,139 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:00:01,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:00:01,140 INFO L85 PathProgramCache]: Analyzing trace with hash 154466670, now seen corresponding path program 1 times [2022-11-20 11:00:01,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:00:01,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206839623] [2022-11-20 11:00:01,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:00:01,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:00:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2022-11-20 11:00:03,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:00:03,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206839623] [2022-11-20 11:00:03,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206839623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:00:03,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:00:03,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:00:03,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445502782] [2022-11-20 11:00:03,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:00:03,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:00:03,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:00:03,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:00:03,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:00:03,059 INFO L87 Difference]: Start difference. First operand 173485 states and 183771 transitions. Second operand has 4 states, 4 states have (on average 136.25) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:10,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:00:10,569 INFO L93 Difference]: Finished difference Result 343213 states and 364959 transitions. [2022-11-20 11:00:10,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:00:10,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 136.25) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 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 804 [2022-11-20 11:00:10,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:00:10,830 INFO L225 Difference]: With dead ends: 343213 [2022-11-20 11:00:10,831 INFO L226 Difference]: Without dead ends: 199770 [2022-11-20 11:00:10,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:00:10,898 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 1552 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 4519 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1552 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 5126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 4519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:00:10,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1552 Valid, 59 Invalid, 5126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 4519 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-20 11:00:11,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199770 states. [2022-11-20 11:00:13,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199770 to 175738. [2022-11-20 11:00:13,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175738 states, 175737 states have (on average 1.0591224386441103) internal successors, (186127), 175737 states have internal predecessors, (186127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:13,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175738 states to 175738 states and 186127 transitions. [2022-11-20 11:00:13,493 INFO L78 Accepts]: Start accepts. Automaton has 175738 states and 186127 transitions. Word has length 804 [2022-11-20 11:00:13,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:00:13,494 INFO L495 AbstractCegarLoop]: Abstraction has 175738 states and 186127 transitions. [2022-11-20 11:00:13,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.25) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:13,494 INFO L276 IsEmpty]: Start isEmpty. Operand 175738 states and 186127 transitions. [2022-11-20 11:00:13,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 858 [2022-11-20 11:00:13,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:00:13,547 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:00:13,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 11:00:13,548 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:00:13,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:00:13,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1926682957, now seen corresponding path program 1 times [2022-11-20 11:00:13,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:00:13,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477029432] [2022-11-20 11:00:13,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:00:13,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:00:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat