./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label17.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label17.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro --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 09db197a4bc835c4357a369c0d6e9c99a50322d20849e0303ed04dd1e516e51b --- 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-8393723 [2022-11-18 21:10:01,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 21:10:01,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 21:10:01,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 21:10:01,240 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 21:10:01,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 21:10:01,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 21:10:01,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 21:10:01,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 21:10:01,247 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 21:10:01,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 21:10:01,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 21:10:01,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 21:10:01,252 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 21:10:01,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 21:10:01,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 21:10:01,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 21:10:01,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 21:10:01,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 21:10:01,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 21:10:01,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 21:10:01,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 21:10:01,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 21:10:01,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 21:10:01,268 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 21:10:01,269 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 21:10:01,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 21:10:01,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 21:10:01,271 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 21:10:01,272 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 21:10:01,272 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 21:10:01,273 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 21:10:01,274 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 21:10:01,275 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 21:10:01,276 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 21:10:01,276 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 21:10:01,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 21:10:01,277 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 21:10:01,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 21:10:01,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 21:10:01,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 21:10:01,280 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 21:10:01,302 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 21:10:01,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 21:10:01,312 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 21:10:01,312 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 21:10:01,313 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 21:10:01,315 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 21:10:01,315 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 21:10:01,316 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 21:10:01,317 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 21:10:01,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 21:10:01,318 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 21:10:01,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 21:10:01,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 21:10:01,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 21:10:01,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 21:10:01,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 21:10:01,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 21:10:01,320 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 21:10:01,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 21:10:01,320 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 21:10:01,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 21:10:01,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 21:10:01,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 21:10:01,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 21:10:01,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:10:01,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 21:10:01,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 21:10:01,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 21:10:01,323 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 21:10:01,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 21:10:01,324 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 21:10:01,324 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 21:10:01,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 21:10:01,325 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_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09db197a4bc835c4357a369c0d6e9c99a50322d20849e0303ed04dd1e516e51b [2022-11-18 21:10:01,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 21:10:01,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 21:10:01,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 21:10:01,638 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 21:10:01,640 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 21:10:01,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/eca-rers2012/Problem03_label17.c [2022-11-18 21:10:01,735 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/data/22496755f/fee417d434454c639ce9659053514691/FLAG195c811b1 [2022-11-18 21:10:02,526 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 21:10:02,527 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/sv-benchmarks/c/eca-rers2012/Problem03_label17.c [2022-11-18 21:10:02,541 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/data/22496755f/fee417d434454c639ce9659053514691/FLAG195c811b1 [2022-11-18 21:10:02,650 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/data/22496755f/fee417d434454c639ce9659053514691 [2022-11-18 21:10:02,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 21:10:02,655 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 21:10:02,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 21:10:02,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 21:10:02,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 21:10:02,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:10:02" (1/1) ... [2022-11-18 21:10:02,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d0437e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:10:02, skipping insertion in model container [2022-11-18 21:10:02,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:10:02" (1/1) ... [2022-11-18 21:10:02,674 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 21:10:02,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 21:10:03,468 WARN L234 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_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/sv-benchmarks/c/eca-rers2012/Problem03_label17.c[61094,61107] [2022-11-18 21:10:03,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:10:03,508 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 21:10:03,795 WARN L234 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_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/sv-benchmarks/c/eca-rers2012/Problem03_label17.c[61094,61107] [2022-11-18 21:10:03,802 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:10:03,821 INFO L208 MainTranslator]: Completed translation [2022-11-18 21:10:03,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:10:03 WrapperNode [2022-11-18 21:10:03,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 21:10:03,823 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 21:10:03,823 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 21:10:03,823 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 21:10:03,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:10:03" (1/1) ... [2022-11-18 21:10:03,865 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:10:03" (1/1) ... [2022-11-18 21:10:03,998 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-18 21:10:03,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 21:10:04,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 21:10:04,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 21:10:04,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 21:10:04,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:10:03" (1/1) ... [2022-11-18 21:10:04,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:10:03" (1/1) ... [2022-11-18 21:10:04,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:10:03" (1/1) ... [2022-11-18 21:10:04,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:10:03" (1/1) ... [2022-11-18 21:10:04,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:10:03" (1/1) ... [2022-11-18 21:10:04,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:10:03" (1/1) ... [2022-11-18 21:10:04,127 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:10:03" (1/1) ... [2022-11-18 21:10:04,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:10:03" (1/1) ... [2022-11-18 21:10:04,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 21:10:04,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 21:10:04,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 21:10:04,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 21:10:04,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:10:03" (1/1) ... [2022-11-18 21:10:04,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:10:04,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:10:04,208 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 21:10:04,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 21:10:04,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 21:10:04,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 21:10:04,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 21:10:04,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 21:10:04,347 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 21:10:04,349 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 21:10:06,698 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 21:10:06,711 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 21:10:06,711 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 21:10:06,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:10:06 BoogieIcfgContainer [2022-11-18 21:10:06,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 21:10:06,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 21:10:06,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 21:10:06,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 21:10:06,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:10:02" (1/3) ... [2022-11-18 21:10:06,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be5faad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:10:06, skipping insertion in model container [2022-11-18 21:10:06,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:10:03" (2/3) ... [2022-11-18 21:10:06,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be5faad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:10:06, skipping insertion in model container [2022-11-18 21:10:06,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:10:06" (3/3) ... [2022-11-18 21:10:06,727 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label17.c [2022-11-18 21:10:06,750 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 21:10:06,751 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 21:10:06,819 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 21:10:06,828 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;@6dcab4b4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 21:10:06,828 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 21:10:06,835 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:06,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-18 21:10:06,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:06,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:06,856 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:06,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:06,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1830500685, now seen corresponding path program 1 times [2022-11-18 21:10:06,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:06,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359141483] [2022-11-18 21:10:06,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:06,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:07,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:08,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:10:08,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:08,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359141483] [2022-11-18 21:10:08,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359141483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:10:08,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:10:08,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:10:08,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236417359] [2022-11-18 21:10:08,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:10:08,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:10:08,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:08,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:10:08,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:10:08,429 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:09,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:09,972 INFO L93 Difference]: Finished difference Result 833 states and 1474 transitions. [2022-11-18 21:10:09,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:10:09,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 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 199 [2022-11-18 21:10:09,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:09,996 INFO L225 Difference]: With dead ends: 833 [2022-11-18 21:10:09,997 INFO L226 Difference]: Without dead ends: 454 [2022-11-18 21:10:10,003 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 [2022-11-18 21:10:10,007 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 92 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:10,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 163 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-18 21:10:10,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-11-18 21:10:10,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 450. [2022-11-18 21:10:10,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.55902004454343) internal successors, (700), 449 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:10,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 700 transitions. [2022-11-18 21:10:10,079 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 700 transitions. Word has length 199 [2022-11-18 21:10:10,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:10,081 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 700 transitions. [2022-11-18 21:10:10,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:10,081 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 700 transitions. [2022-11-18 21:10:10,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-18 21:10:10,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:10,086 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:10,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 21:10:10,087 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:10,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:10,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1786939481, now seen corresponding path program 1 times [2022-11-18 21:10:10,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:10,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455488854] [2022-11-18 21:10:10,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:10,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:10:10,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:10,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455488854] [2022-11-18 21:10:10,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455488854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:10:10,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:10:10,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:10:10,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690958404] [2022-11-18 21:10:10,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:10:10,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:10:10,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:10,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:10:10,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:10:10,574 INFO L87 Difference]: Start difference. First operand 450 states and 700 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:11,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:11,591 INFO L93 Difference]: Finished difference Result 1337 states and 2085 transitions. [2022-11-18 21:10:11,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:10:11,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 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 205 [2022-11-18 21:10:11,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:11,597 INFO L225 Difference]: With dead ends: 1337 [2022-11-18 21:10:11,598 INFO L226 Difference]: Without dead ends: 889 [2022-11-18 21:10:11,602 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 [2022-11-18 21:10:11,607 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:11,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 104 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 21:10:11,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-11-18 21:10:11,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 885. [2022-11-18 21:10:11,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 1.5429864253393666) internal successors, (1364), 884 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:11,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1364 transitions. [2022-11-18 21:10:11,665 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1364 transitions. Word has length 205 [2022-11-18 21:10:11,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:11,665 INFO L495 AbstractCegarLoop]: Abstraction has 885 states and 1364 transitions. [2022-11-18 21:10:11,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:11,666 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1364 transitions. [2022-11-18 21:10:11,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-11-18 21:10:11,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:11,687 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:11,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 21:10:11,689 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:11,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:11,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1463720228, now seen corresponding path program 1 times [2022-11-18 21:10:11,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:11,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715602912] [2022-11-18 21:10:11,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:11,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:10:11,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:11,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715602912] [2022-11-18 21:10:11,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715602912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:10:11,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:10:11,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:10:11,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659304725] [2022-11-18 21:10:11,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:10:11,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:10:11,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:11,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:10:11,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:10:11,955 INFO L87 Difference]: Start difference. First operand 885 states and 1364 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:13,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:13,110 INFO L93 Difference]: Finished difference Result 2599 states and 4012 transitions. [2022-11-18 21:10:13,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:10:13,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 212 [2022-11-18 21:10:13,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:13,118 INFO L225 Difference]: With dead ends: 2599 [2022-11-18 21:10:13,118 INFO L226 Difference]: Without dead ends: 1716 [2022-11-18 21:10:13,120 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 [2022-11-18 21:10:13,121 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 258 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:13,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 134 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 21:10:13,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-11-18 21:10:13,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1714. [2022-11-18 21:10:13,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 1.4687682428488034) internal successors, (2516), 1713 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:13,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 2516 transitions. [2022-11-18 21:10:13,181 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 2516 transitions. Word has length 212 [2022-11-18 21:10:13,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:13,181 INFO L495 AbstractCegarLoop]: Abstraction has 1714 states and 2516 transitions. [2022-11-18 21:10:13,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:13,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 2516 transitions. [2022-11-18 21:10:13,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-11-18 21:10:13,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:13,190 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 21:10:13,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 21:10:13,191 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:13,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:13,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1975689975, now seen corresponding path program 1 times [2022-11-18 21:10:13,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:13,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270260493] [2022-11-18 21:10:13,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:13,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:10:13,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:13,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270260493] [2022-11-18 21:10:13,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270260493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:10:13,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:10:13,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:10:13,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717940975] [2022-11-18 21:10:13,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:10:13,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:10:13,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:13,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:10:13,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:10:13,551 INFO L87 Difference]: Start difference. First operand 1714 states and 2516 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:14,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:14,735 INFO L93 Difference]: Finished difference Result 4665 states and 6865 transitions. [2022-11-18 21:10:14,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:10:14,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 0 states have call successors, (0), 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 212 [2022-11-18 21:10:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:14,750 INFO L225 Difference]: With dead ends: 4665 [2022-11-18 21:10:14,750 INFO L226 Difference]: Without dead ends: 2953 [2022-11-18 21:10:14,752 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 [2022-11-18 21:10:14,756 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 241 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:14,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 167 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 21:10:14,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2022-11-18 21:10:14,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 2949. [2022-11-18 21:10:14,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2948 states have (on average 1.4189280868385346) internal successors, (4183), 2948 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:14,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 4183 transitions. [2022-11-18 21:10:14,831 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 4183 transitions. Word has length 212 [2022-11-18 21:10:14,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:14,832 INFO L495 AbstractCegarLoop]: Abstraction has 2949 states and 4183 transitions. [2022-11-18 21:10:14,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:14,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 4183 transitions. [2022-11-18 21:10:14,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-11-18 21:10:14,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:14,840 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-18 21:10:14,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 21:10:14,840 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:14,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:14,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1982755944, now seen corresponding path program 1 times [2022-11-18 21:10:14,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:14,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415768904] [2022-11-18 21:10:14,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:14,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 21:10:15,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:15,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415768904] [2022-11-18 21:10:15,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415768904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:10:15,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:10:15,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:10:15,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863914747] [2022-11-18 21:10:15,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:10:15,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:10:15,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:15,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:10:15,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:10:15,104 INFO L87 Difference]: Start difference. First operand 2949 states and 4183 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:16,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:16,369 INFO L93 Difference]: Finished difference Result 8575 states and 12210 transitions. [2022-11-18 21:10:16,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:10:16,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 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 213 [2022-11-18 21:10:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:16,392 INFO L225 Difference]: With dead ends: 8575 [2022-11-18 21:10:16,392 INFO L226 Difference]: Without dead ends: 5831 [2022-11-18 21:10:16,398 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 [2022-11-18 21:10:16,403 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:16,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-18 21:10:16,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5831 states. [2022-11-18 21:10:16,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5831 to 5795. [2022-11-18 21:10:16,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5795 states, 5794 states have (on average 1.387124611667242) internal successors, (8037), 5794 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:16,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5795 states to 5795 states and 8037 transitions. [2022-11-18 21:10:16,569 INFO L78 Accepts]: Start accepts. Automaton has 5795 states and 8037 transitions. Word has length 213 [2022-11-18 21:10:16,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:16,571 INFO L495 AbstractCegarLoop]: Abstraction has 5795 states and 8037 transitions. [2022-11-18 21:10:16,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:16,575 INFO L276 IsEmpty]: Start isEmpty. Operand 5795 states and 8037 transitions. [2022-11-18 21:10:16,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-11-18 21:10:16,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:16,588 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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] [2022-11-18 21:10:16,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 21:10:16,589 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:16,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:16,590 INFO L85 PathProgramCache]: Analyzing trace with hash -862515586, now seen corresponding path program 1 times [2022-11-18 21:10:16,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:16,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950799060] [2022-11-18 21:10:16,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:16,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 21:10:17,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:17,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950799060] [2022-11-18 21:10:17,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950799060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:10:17,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:10:17,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:10:17,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204762823] [2022-11-18 21:10:17,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:10:17,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:10:17,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:17,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:10:17,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:10:17,110 INFO L87 Difference]: Start difference. First operand 5795 states and 8037 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:18,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:18,499 INFO L93 Difference]: Finished difference Result 17290 states and 23986 transitions. [2022-11-18 21:10:18,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:10:18,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 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 227 [2022-11-18 21:10:18,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:18,547 INFO L225 Difference]: With dead ends: 17290 [2022-11-18 21:10:18,547 INFO L226 Difference]: Without dead ends: 11497 [2022-11-18 21:10:18,555 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 [2022-11-18 21:10:18,558 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 217 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:18,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 414 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-18 21:10:18,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11497 states. [2022-11-18 21:10:18,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11497 to 11490. [2022-11-18 21:10:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11490 states, 11489 states have (on average 1.298807555052659) internal successors, (14922), 11489 states have internal predecessors, (14922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:18,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11490 states to 11490 states and 14922 transitions. [2022-11-18 21:10:18,900 INFO L78 Accepts]: Start accepts. Automaton has 11490 states and 14922 transitions. Word has length 227 [2022-11-18 21:10:18,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:18,902 INFO L495 AbstractCegarLoop]: Abstraction has 11490 states and 14922 transitions. [2022-11-18 21:10:18,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:18,902 INFO L276 IsEmpty]: Start isEmpty. Operand 11490 states and 14922 transitions. [2022-11-18 21:10:18,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-11-18 21:10:18,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:18,924 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:18,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 21:10:18,925 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:18,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:18,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1762359950, now seen corresponding path program 1 times [2022-11-18 21:10:18,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:18,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361356960] [2022-11-18 21:10:18,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:18,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:19,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 21:10:19,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:19,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361356960] [2022-11-18 21:10:19,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361356960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:10:19,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:10:19,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:10:19,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130523579] [2022-11-18 21:10:19,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:10:19,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:10:19,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:19,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:10:19,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:10:19,514 INFO L87 Difference]: Start difference. First operand 11490 states and 14922 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:20,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:20,733 INFO L93 Difference]: Finished difference Result 30543 states and 39618 transitions. [2022-11-18 21:10:20,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:10:20,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 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 234 [2022-11-18 21:10:20,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:20,803 INFO L225 Difference]: With dead ends: 30543 [2022-11-18 21:10:20,803 INFO L226 Difference]: Without dead ends: 19867 [2022-11-18 21:10:20,816 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 [2022-11-18 21:10:20,820 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 219 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:20,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 162 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 21:10:20,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19867 states. [2022-11-18 21:10:21,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19867 to 19849. [2022-11-18 21:10:21,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19849 states, 19848 states have (on average 1.2677347843611446) internal successors, (25162), 19848 states have internal predecessors, (25162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:21,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19849 states to 19849 states and 25162 transitions. [2022-11-18 21:10:21,283 INFO L78 Accepts]: Start accepts. Automaton has 19849 states and 25162 transitions. Word has length 234 [2022-11-18 21:10:21,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:21,284 INFO L495 AbstractCegarLoop]: Abstraction has 19849 states and 25162 transitions. [2022-11-18 21:10:21,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:21,285 INFO L276 IsEmpty]: Start isEmpty. Operand 19849 states and 25162 transitions. [2022-11-18 21:10:21,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-11-18 21:10:21,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:21,315 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:21,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 21:10:21,315 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:21,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:21,316 INFO L85 PathProgramCache]: Analyzing trace with hash 968891670, now seen corresponding path program 1 times [2022-11-18 21:10:21,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:21,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347946098] [2022-11-18 21:10:21,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:21,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 21:10:21,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:21,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347946098] [2022-11-18 21:10:21,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347946098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:10:21,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:10:21,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:10:21,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212905254] [2022-11-18 21:10:21,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:10:21,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:10:21,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:21,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:10:21,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:10:21,771 INFO L87 Difference]: Start difference. First operand 19849 states and 25162 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:23,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:23,070 INFO L93 Difference]: Finished difference Result 45211 states and 57514 transitions. [2022-11-18 21:10:23,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:10:23,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 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 253 [2022-11-18 21:10:23,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:23,125 INFO L225 Difference]: With dead ends: 45211 [2022-11-18 21:10:23,125 INFO L226 Difference]: Without dead ends: 25364 [2022-11-18 21:10:23,145 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 [2022-11-18 21:10:23,146 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 210 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:23,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 408 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 21:10:23,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25364 states. [2022-11-18 21:10:23,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25364 to 24516. [2022-11-18 21:10:23,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24516 states, 24515 states have (on average 1.2369161737711605) internal successors, (30323), 24515 states have internal predecessors, (30323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:23,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24516 states to 24516 states and 30323 transitions. [2022-11-18 21:10:23,601 INFO L78 Accepts]: Start accepts. Automaton has 24516 states and 30323 transitions. Word has length 253 [2022-11-18 21:10:23,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:23,602 INFO L495 AbstractCegarLoop]: Abstraction has 24516 states and 30323 transitions. [2022-11-18 21:10:23,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:23,602 INFO L276 IsEmpty]: Start isEmpty. Operand 24516 states and 30323 transitions. [2022-11-18 21:10:23,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-11-18 21:10:23,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:23,638 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 21:10:23,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 21:10:23,638 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:23,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:23,639 INFO L85 PathProgramCache]: Analyzing trace with hash -268911777, now seen corresponding path program 1 times [2022-11-18 21:10:23,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:23,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348333591] [2022-11-18 21:10:23,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:23,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-18 21:10:24,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:24,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348333591] [2022-11-18 21:10:24,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348333591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:10:24,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:10:24,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:10:24,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931019636] [2022-11-18 21:10:24,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:10:24,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:10:24,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:24,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:10:24,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:10:24,356 INFO L87 Difference]: Start difference. First operand 24516 states and 30323 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:25,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:25,709 INFO L93 Difference]: Finished difference Result 53726 states and 66220 transitions. [2022-11-18 21:10:25,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:10:25,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2022-11-18 21:10:25,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:25,757 INFO L225 Difference]: With dead ends: 53726 [2022-11-18 21:10:25,757 INFO L226 Difference]: Without dead ends: 30227 [2022-11-18 21:10:25,772 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 [2022-11-18 21:10:25,773 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 204 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:25,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 184 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 21:10:25,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30227 states. [2022-11-18 21:10:26,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30227 to 30200. [2022-11-18 21:10:26,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30200 states, 30199 states have (on average 1.2160336434981291) internal successors, (36723), 30199 states have internal predecessors, (36723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30200 states to 30200 states and 36723 transitions. [2022-11-18 21:10:26,428 INFO L78 Accepts]: Start accepts. Automaton has 30200 states and 36723 transitions. Word has length 259 [2022-11-18 21:10:26,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:26,428 INFO L495 AbstractCegarLoop]: Abstraction has 30200 states and 36723 transitions. [2022-11-18 21:10:26,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:26,429 INFO L276 IsEmpty]: Start isEmpty. Operand 30200 states and 36723 transitions. [2022-11-18 21:10:26,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-18 21:10:26,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:26,459 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:26,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 21:10:26,459 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:26,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:26,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1560875220, now seen corresponding path program 2 times [2022-11-18 21:10:26,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:26,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899849003] [2022-11-18 21:10:26,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:26,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-18 21:10:27,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:27,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899849003] [2022-11-18 21:10:27,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899849003] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:10:27,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471378237] [2022-11-18 21:10:27,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:10:27,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:10:27,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:10:27,293 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:10:27,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 21:10:27,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:10:27,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:10:27,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 21:10:27,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-18 21:10:28,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:10:28,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471378237] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:10:28,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:10:28,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-18 21:10:28,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330204317] [2022-11-18 21:10:28,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:10:28,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:10:28,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:28,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:10:28,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:10:28,091 INFO L87 Difference]: Start difference. First operand 30200 states and 36723 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:29,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:29,536 INFO L93 Difference]: Finished difference Result 66947 states and 82285 transitions. [2022-11-18 21:10:29,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:10:29,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 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 266 [2022-11-18 21:10:29,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:29,584 INFO L225 Difference]: With dead ends: 66947 [2022-11-18 21:10:29,584 INFO L226 Difference]: Without dead ends: 37561 [2022-11-18 21:10:29,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:10:29,604 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 70 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:29,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 189 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 21:10:29,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37561 states. [2022-11-18 21:10:30,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37561 to 37538. [2022-11-18 21:10:30,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37538 states, 37537 states have (on average 1.214481711378107) internal successors, (45588), 37537 states have internal predecessors, (45588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:30,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37538 states to 37538 states and 45588 transitions. [2022-11-18 21:10:30,223 INFO L78 Accepts]: Start accepts. Automaton has 37538 states and 45588 transitions. Word has length 266 [2022-11-18 21:10:30,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:30,224 INFO L495 AbstractCegarLoop]: Abstraction has 37538 states and 45588 transitions. [2022-11-18 21:10:30,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:30,225 INFO L276 IsEmpty]: Start isEmpty. Operand 37538 states and 45588 transitions. [2022-11-18 21:10:30,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-11-18 21:10:30,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:30,264 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-18 21:10:30,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 21:10:30,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 21:10:30,482 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:30,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:30,483 INFO L85 PathProgramCache]: Analyzing trace with hash 659764699, now seen corresponding path program 1 times [2022-11-18 21:10:30,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:30,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711096443] [2022-11-18 21:10:30,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:30,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:30,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-18 21:10:31,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:31,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711096443] [2022-11-18 21:10:31,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711096443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:10:31,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:10:31,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:10:31,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366371771] [2022-11-18 21:10:31,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:10:31,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:10:31,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:31,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:10:31,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:10:31,039 INFO L87 Difference]: Start difference. First operand 37538 states and 45588 transitions. Second operand has 4 states, 4 states have (on average 61.0) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:32,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:32,933 INFO L93 Difference]: Finished difference Result 71893 states and 87534 transitions. [2022-11-18 21:10:32,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:10:32,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.0) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 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 269 [2022-11-18 21:10:32,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:32,978 INFO L225 Difference]: With dead ends: 71893 [2022-11-18 21:10:32,980 INFO L226 Difference]: Without dead ends: 37605 [2022-11-18 21:10:33,001 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 [2022-11-18 21:10:33,002 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 433 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:33,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 193 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-18 21:10:33,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37605 states. [2022-11-18 21:10:33,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37605 to 36726. [2022-11-18 21:10:33,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36726 states, 36725 states have (on average 1.2159836623553437) internal successors, (44657), 36725 states have internal predecessors, (44657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:33,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36726 states to 36726 states and 44657 transitions. [2022-11-18 21:10:33,958 INFO L78 Accepts]: Start accepts. Automaton has 36726 states and 44657 transitions. Word has length 269 [2022-11-18 21:10:33,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:33,958 INFO L495 AbstractCegarLoop]: Abstraction has 36726 states and 44657 transitions. [2022-11-18 21:10:33,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.0) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:33,958 INFO L276 IsEmpty]: Start isEmpty. Operand 36726 states and 44657 transitions. [2022-11-18 21:10:34,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-11-18 21:10:34,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:34,001 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:34,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 21:10:34,001 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:34,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:34,002 INFO L85 PathProgramCache]: Analyzing trace with hash 2084764944, now seen corresponding path program 1 times [2022-11-18 21:10:34,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:34,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288806733] [2022-11-18 21:10:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:34,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 88 proven. 6 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-18 21:10:34,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:34,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288806733] [2022-11-18 21:10:34,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288806733] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:10:34,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504764721] [2022-11-18 21:10:34,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:34,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:10:34,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:10:34,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:10:34,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 21:10:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:34,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 21:10:34,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 21:10:34,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:10:34,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504764721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:10:34,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:10:34,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-18 21:10:34,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782846009] [2022-11-18 21:10:34,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:10:34,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:10:34,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:34,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:10:34,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:10:34,797 INFO L87 Difference]: Start difference. First operand 36726 states and 44657 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:36,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:36,092 INFO L93 Difference]: Finished difference Result 69850 states and 84980 transitions. [2022-11-18 21:10:36,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:10:36,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 276 [2022-11-18 21:10:36,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:36,124 INFO L225 Difference]: With dead ends: 69850 [2022-11-18 21:10:36,125 INFO L226 Difference]: Without dead ends: 33938 [2022-11-18 21:10:36,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:10:36,144 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 212 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:36,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 363 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 21:10:36,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33938 states. [2022-11-18 21:10:36,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33938 to 33884. [2022-11-18 21:10:36,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33884 states, 33883 states have (on average 1.2028745978809432) internal successors, (40757), 33883 states have internal predecessors, (40757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:36,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33884 states to 33884 states and 40757 transitions. [2022-11-18 21:10:36,680 INFO L78 Accepts]: Start accepts. Automaton has 33884 states and 40757 transitions. Word has length 276 [2022-11-18 21:10:36,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:36,680 INFO L495 AbstractCegarLoop]: Abstraction has 33884 states and 40757 transitions. [2022-11-18 21:10:36,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:36,681 INFO L276 IsEmpty]: Start isEmpty. Operand 33884 states and 40757 transitions. [2022-11-18 21:10:36,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-11-18 21:10:36,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:36,718 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:36,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 21:10:36,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 21:10:36,924 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:36,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:36,924 INFO L85 PathProgramCache]: Analyzing trace with hash 828148250, now seen corresponding path program 1 times [2022-11-18 21:10:36,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:36,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300295625] [2022-11-18 21:10:36,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:36,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:37,390 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 92 proven. 6 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-18 21:10:37,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:37,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300295625] [2022-11-18 21:10:37,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300295625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:10:37,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396858604] [2022-11-18 21:10:37,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:37,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:10:37,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:10:37,392 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:10:37,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 21:10:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:37,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 21:10:37,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-18 21:10:38,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:10:38,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396858604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:10:38,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:10:38,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-18 21:10:38,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591418885] [2022-11-18 21:10:38,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:10:38,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:10:38,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:38,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:10:38,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:10:38,128 INFO L87 Difference]: Start difference. First operand 33884 states and 40757 transitions. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:39,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:39,439 INFO L93 Difference]: Finished difference Result 70874 states and 86066 transitions. [2022-11-18 21:10:39,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:10:39,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 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 280 [2022-11-18 21:10:39,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:39,496 INFO L225 Difference]: With dead ends: 70874 [2022-11-18 21:10:39,496 INFO L226 Difference]: Without dead ends: 39428 [2022-11-18 21:10:39,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:10:39,522 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 45 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:39,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 187 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 21:10:39,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39428 states. [2022-11-18 21:10:40,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39428 to 39373. [2022-11-18 21:10:40,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39373 states, 39372 states have (on average 1.2134511835822412) internal successors, (47776), 39372 states have internal predecessors, (47776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:40,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39373 states to 39373 states and 47776 transitions. [2022-11-18 21:10:40,342 INFO L78 Accepts]: Start accepts. Automaton has 39373 states and 47776 transitions. Word has length 280 [2022-11-18 21:10:40,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:40,343 INFO L495 AbstractCegarLoop]: Abstraction has 39373 states and 47776 transitions. [2022-11-18 21:10:40,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:40,343 INFO L276 IsEmpty]: Start isEmpty. Operand 39373 states and 47776 transitions. [2022-11-18 21:10:40,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-11-18 21:10:40,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:40,397 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:40,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-18 21:10:40,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 21:10:40,603 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:40,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:40,604 INFO L85 PathProgramCache]: Analyzing trace with hash 902513258, now seen corresponding path program 1 times [2022-11-18 21:10:40,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:40,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568940357] [2022-11-18 21:10:40,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:40,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 122 proven. 6 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-18 21:10:41,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:41,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568940357] [2022-11-18 21:10:41,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568940357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:10:41,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369499570] [2022-11-18 21:10:41,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:41,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:10:41,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:10:41,113 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:10:41,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 21:10:41,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:41,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 21:10:41,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-18 21:10:41,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:10:41,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369499570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:10:41,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:10:41,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-18 21:10:41,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114226825] [2022-11-18 21:10:41,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:10:41,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:10:41,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:41,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:10:41,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:10:41,526 INFO L87 Difference]: Start difference. First operand 39373 states and 47776 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:42,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:42,298 INFO L93 Difference]: Finished difference Result 108703 states and 132129 transitions. [2022-11-18 21:10:42,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:10:42,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 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 304 [2022-11-18 21:10:42,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:42,391 INFO L225 Difference]: With dead ends: 108703 [2022-11-18 21:10:42,391 INFO L226 Difference]: Without dead ends: 71768 [2022-11-18 21:10:42,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:10:42,420 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 303 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:42,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 917 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 21:10:42,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71768 states. [2022-11-18 21:10:43,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71768 to 70954. [2022-11-18 21:10:43,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70954 states, 70953 states have (on average 1.1937902555212605) internal successors, (84703), 70953 states have internal predecessors, (84703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:43,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70954 states to 70954 states and 84703 transitions. [2022-11-18 21:10:43,336 INFO L78 Accepts]: Start accepts. Automaton has 70954 states and 84703 transitions. Word has length 304 [2022-11-18 21:10:43,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:43,336 INFO L495 AbstractCegarLoop]: Abstraction has 70954 states and 84703 transitions. [2022-11-18 21:10:43,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:43,336 INFO L276 IsEmpty]: Start isEmpty. Operand 70954 states and 84703 transitions. [2022-11-18 21:10:43,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-11-18 21:10:43,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:43,740 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-11-18 21:10:43,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 21:10:43,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:10:43,946 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:43,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:43,947 INFO L85 PathProgramCache]: Analyzing trace with hash 499805069, now seen corresponding path program 1 times [2022-11-18 21:10:43,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:43,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225053811] [2022-11-18 21:10:43,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:43,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-11-18 21:10:44,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:44,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225053811] [2022-11-18 21:10:44,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225053811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:10:44,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:10:44,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:10:44,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370564790] [2022-11-18 21:10:44,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:10:44,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:10:44,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:44,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:10:44,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:10:44,295 INFO L87 Difference]: Start difference. First operand 70954 states and 84703 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:46,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:46,139 INFO L93 Difference]: Finished difference Result 156565 states and 186686 transitions. [2022-11-18 21:10:46,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:10:46,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 0 states have call successors, (0), 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 304 [2022-11-18 21:10:46,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:46,278 INFO L225 Difference]: With dead ends: 156565 [2022-11-18 21:10:46,278 INFO L226 Difference]: Without dead ends: 88049 [2022-11-18 21:10:46,319 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 [2022-11-18 21:10:46,321 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 232 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:46,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 164 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-18 21:10:46,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88049 states. [2022-11-18 21:10:47,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88049 to 88045. [2022-11-18 21:10:47,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88045 states, 88044 states have (on average 1.1713461451092635) internal successors, (103130), 88044 states have internal predecessors, (103130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:47,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88045 states to 88045 states and 103130 transitions. [2022-11-18 21:10:47,743 INFO L78 Accepts]: Start accepts. Automaton has 88045 states and 103130 transitions. Word has length 304 [2022-11-18 21:10:47,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:47,744 INFO L495 AbstractCegarLoop]: Abstraction has 88045 states and 103130 transitions. [2022-11-18 21:10:47,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 88045 states and 103130 transitions. [2022-11-18 21:10:47,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-11-18 21:10:47,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:47,804 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 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] [2022-11-18 21:10:47,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 21:10:47,805 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:47,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:47,805 INFO L85 PathProgramCache]: Analyzing trace with hash -728099305, now seen corresponding path program 1 times [2022-11-18 21:10:47,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:47,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500198378] [2022-11-18 21:10:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:47,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 75 proven. 6 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-18 21:10:48,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:48,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500198378] [2022-11-18 21:10:48,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500198378] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:10:48,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111738249] [2022-11-18 21:10:48,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:48,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:10:48,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:10:48,702 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:10:48,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 21:10:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:48,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 21:10:48,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:48,984 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-18 21:10:48,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:10:48,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111738249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:10:48,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:10:48,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-18 21:10:48,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432259199] [2022-11-18 21:10:48,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:10:48,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:10:48,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:48,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:10:48,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:10:48,987 INFO L87 Difference]: Start difference. First operand 88045 states and 103130 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:50,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:50,699 INFO L93 Difference]: Finished difference Result 202668 states and 238273 transitions. [2022-11-18 21:10:50,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:10:50,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 311 [2022-11-18 21:10:50,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:50,839 INFO L225 Difference]: With dead ends: 202668 [2022-11-18 21:10:50,839 INFO L226 Difference]: Without dead ends: 115437 [2022-11-18 21:10:50,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:10:50,879 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 222 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:50,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 171 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 21:10:50,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115437 states. [2022-11-18 21:10:52,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115437 to 100605. [2022-11-18 21:10:52,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100605 states, 100604 states have (on average 1.127917379030655) internal successors, (113473), 100604 states have internal predecessors, (113473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:53,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100605 states to 100605 states and 113473 transitions. [2022-11-18 21:10:53,155 INFO L78 Accepts]: Start accepts. Automaton has 100605 states and 113473 transitions. Word has length 311 [2022-11-18 21:10:53,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:53,155 INFO L495 AbstractCegarLoop]: Abstraction has 100605 states and 113473 transitions. [2022-11-18 21:10:53,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:53,156 INFO L276 IsEmpty]: Start isEmpty. Operand 100605 states and 113473 transitions. [2022-11-18 21:10:53,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-11-18 21:10:53,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:53,244 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 21:10:53,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 21:10:53,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 21:10:53,451 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:53,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:53,451 INFO L85 PathProgramCache]: Analyzing trace with hash -2024505437, now seen corresponding path program 1 times [2022-11-18 21:10:53,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:53,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456741538] [2022-11-18 21:10:53,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:53,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 94 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-18 21:10:54,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:54,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456741538] [2022-11-18 21:10:54,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456741538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:10:54,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358483542] [2022-11-18 21:10:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:54,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:10:54,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:10:54,047 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:10:54,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 21:10:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:54,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 21:10:54,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-18 21:10:54,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:10:54,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358483542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:10:54,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:10:54,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-18 21:10:54,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956183371] [2022-11-18 21:10:54,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:10:54,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:10:54,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:54,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:10:54,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:10:54,652 INFO L87 Difference]: Start difference. First operand 100605 states and 113473 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:56,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:56,428 INFO L93 Difference]: Finished difference Result 214147 states and 240630 transitions. [2022-11-18 21:10:56,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:10:56,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 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 321 [2022-11-18 21:10:56,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:56,564 INFO L225 Difference]: With dead ends: 214147 [2022-11-18 21:10:56,564 INFO L226 Difference]: Without dead ends: 114153 [2022-11-18 21:10:56,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:10:56,610 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 78 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:56,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 103 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 21:10:56,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114153 states. [2022-11-18 21:10:58,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114153 to 110289. [2022-11-18 21:10:58,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110289 states, 110288 states have (on average 1.1191698099521254) internal successors, (123431), 110288 states have internal predecessors, (123431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:58,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110289 states to 110289 states and 123431 transitions. [2022-11-18 21:10:58,548 INFO L78 Accepts]: Start accepts. Automaton has 110289 states and 123431 transitions. Word has length 321 [2022-11-18 21:10:58,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:58,549 INFO L495 AbstractCegarLoop]: Abstraction has 110289 states and 123431 transitions. [2022-11-18 21:10:58,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:58,550 INFO L276 IsEmpty]: Start isEmpty. Operand 110289 states and 123431 transitions. [2022-11-18 21:10:58,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-11-18 21:10:58,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:58,658 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 21:10:58,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 21:10:58,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 21:10:58,865 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:58,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:58,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1934345327, now seen corresponding path program 1 times [2022-11-18 21:10:58,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:58,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396670957] [2022-11-18 21:10:58,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:58,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 93 proven. 6 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-18 21:10:59,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:59,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396670957] [2022-11-18 21:10:59,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396670957] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:10:59,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319344705] [2022-11-18 21:10:59,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:59,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:10:59,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:10:59,341 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:10:59,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 21:10:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:59,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 21:10:59,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 180 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 21:11:00,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:00,261 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 180 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 21:11:00,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319344705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:11:00,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:11:00,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2022-11-18 21:11:00,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306020109] [2022-11-18 21:11:00,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:00,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 21:11:00,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:00,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 21:11:00,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:11:00,265 INFO L87 Difference]: Start difference. First operand 110289 states and 123431 transitions. Second operand has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:06,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:06,082 INFO L93 Difference]: Finished difference Result 381045 states and 428412 transitions. [2022-11-18 21:11:06,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 21:11:06,082 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 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 324 [2022-11-18 21:11:06,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:06,383 INFO L225 Difference]: With dead ends: 381045 [2022-11-18 21:11:06,383 INFO L226 Difference]: Without dead ends: 271367 [2022-11-18 21:11:06,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 652 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-18 21:11:06,801 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 2949 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 3877 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2949 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 4500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 3877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:06,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2949 Valid, 378 Invalid, 4500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 3877 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-18 21:11:06,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271367 states. [2022-11-18 21:11:10,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271367 to 259278. [2022-11-18 21:11:10,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259278 states, 259277 states have (on average 1.1074835022003495) internal successors, (287145), 259277 states have internal predecessors, (287145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:11,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259278 states to 259278 states and 287145 transitions. [2022-11-18 21:11:11,046 INFO L78 Accepts]: Start accepts. Automaton has 259278 states and 287145 transitions. Word has length 324 [2022-11-18 21:11:11,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:11,046 INFO L495 AbstractCegarLoop]: Abstraction has 259278 states and 287145 transitions. [2022-11-18 21:11:11,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:11,047 INFO L276 IsEmpty]: Start isEmpty. Operand 259278 states and 287145 transitions. [2022-11-18 21:11:11,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-18 21:11:11,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:11,118 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 21:11:11,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:11,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bca699b-8d8a-4a4d-9296-7c5d6ab9bd52/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 21:11:11,319 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:11,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:11,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1568167906, now seen corresponding path program 1 times [2022-11-18 21:11:11,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:11,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083872909] [2022-11-18 21:11:11,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:11,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-18 21:11:12,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:12,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083872909] [2022-11-18 21:11:12,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083872909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:12,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:11:12,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:11:12,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220940383] [2022-11-18 21:11:12,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:12,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:11:12,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:12,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:11:12,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:11:12,378 INFO L87 Difference]: Start difference. First operand 259278 states and 287145 transitions. Second operand has 4 states, 4 states have (on average 75.5) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)