./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label19.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label19.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa --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 dbab4b57592d1cd844f46032ce61618d4e076adc5adb242b34e740348fe0a295 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:33:44,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:33:44,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:33:44,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:33:44,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:33:44,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:33:44,298 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:33:44,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:33:44,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:33:44,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:33:44,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:33:44,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:33:44,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:33:44,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:33:44,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:33:44,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:33:44,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:33:44,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:33:44,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:33:44,313 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:33:44,315 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:33:44,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:33:44,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:33:44,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:33:44,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:33:44,321 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:33:44,321 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:33:44,322 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:33:44,322 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:33:44,323 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:33:44,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:33:44,324 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:33:44,325 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:33:44,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:33:44,326 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:33:44,327 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:33:44,327 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:33:44,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:33:44,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:33:44,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:33:44,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:33:44,329 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 19:33:44,347 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:33:44,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:33:44,347 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:33:44,347 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:33:44,348 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:33:44,348 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:33:44,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:33:44,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:33:44,349 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:33:44,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:33:44,349 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:33:44,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:33:44,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:33:44,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:33:44,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:33:44,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:33:44,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:33:44,350 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:33:44,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:33:44,350 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:33:44,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:33:44,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:33:44,351 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:33:44,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:33:44,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:33:44,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:33:44,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:33:44,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:33:44,352 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:33:44,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:33:44,352 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:33:44,352 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:33:44,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:33:44,352 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:33:44,353 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_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dbab4b57592d1cd844f46032ce61618d4e076adc5adb242b34e740348fe0a295 [2021-12-06 19:33:44,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:33:44,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:33:44,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:33:44,546 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:33:44,546 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:33:44,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem03_label19.c [2021-12-06 19:33:44,592 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/data/74cd216fd/0039befa01404d5381446382151bc23c/FLAG29128c121 [2021-12-06 19:33:45,094 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:33:45,094 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/sv-benchmarks/c/eca-rers2012/Problem03_label19.c [2021-12-06 19:33:45,109 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/data/74cd216fd/0039befa01404d5381446382151bc23c/FLAG29128c121 [2021-12-06 19:33:45,624 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/data/74cd216fd/0039befa01404d5381446382151bc23c [2021-12-06 19:33:45,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:33:45,627 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:33:45,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:33:45,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:33:45,631 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:33:45,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:33:45" (1/1) ... [2021-12-06 19:33:45,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c265909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:45, skipping insertion in model container [2021-12-06 19:33:45,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:33:45" (1/1) ... [2021-12-06 19:33:45,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:33:45,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:33:46,095 WARN L230 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_3481c6c9-3f9d-4c67-a42e-b205995d2900/sv-benchmarks/c/eca-rers2012/Problem03_label19.c[59475,59488] [2021-12-06 19:33:46,113 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:33:46,120 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:33:46,273 WARN L230 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_3481c6c9-3f9d-4c67-a42e-b205995d2900/sv-benchmarks/c/eca-rers2012/Problem03_label19.c[59475,59488] [2021-12-06 19:33:46,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:33:46,296 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:33:46,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:46 WrapperNode [2021-12-06 19:33:46,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:33:46,297 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:33:46,297 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:33:46,298 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:33:46,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:46" (1/1) ... [2021-12-06 19:33:46,329 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:46" (1/1) ... [2021-12-06 19:33:46,385 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-06 19:33:46,386 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:33:46,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:33:46,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:33:46,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:33:46,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:46" (1/1) ... [2021-12-06 19:33:46,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:46" (1/1) ... [2021-12-06 19:33:46,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:46" (1/1) ... [2021-12-06 19:33:46,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:46" (1/1) ... [2021-12-06 19:33:46,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:46" (1/1) ... [2021-12-06 19:33:46,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:46" (1/1) ... [2021-12-06 19:33:46,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:46" (1/1) ... [2021-12-06 19:33:46,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:33:46,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:33:46,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:33:46,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:33:46,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:46" (1/1) ... [2021-12-06 19:33:46,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:33:46,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:33:46,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:33:46,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:33:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:33:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:33:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:33:46,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:33:46,595 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:33:46,596 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:33:47,655 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:33:47,666 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:33:47,666 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 19:33:47,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:33:47 BoogieIcfgContainer [2021-12-06 19:33:47,669 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:33:47,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:33:47,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:33:47,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:33:47,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:33:45" (1/3) ... [2021-12-06 19:33:47,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@512766f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:33:47, skipping insertion in model container [2021-12-06 19:33:47,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:46" (2/3) ... [2021-12-06 19:33:47,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@512766f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:33:47, skipping insertion in model container [2021-12-06 19:33:47,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:33:47" (3/3) ... [2021-12-06 19:33:47,677 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label19.c [2021-12-06 19:33:47,682 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:33:47,682 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:33:47,722 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:33:47,728 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 19:33:47,728 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 19:33:47,744 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) [2021-12-06 19:33:47,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-06 19:33:47,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:47,759 INFO L514 BasicCegarLoop]: 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] [2021-12-06 19:33:47,760 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:47,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:47,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1077687485, now seen corresponding path program 1 times [2021-12-06 19:33:47,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:47,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733134999] [2021-12-06 19:33:47,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:47,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:33:48,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:48,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733134999] [2021-12-06 19:33:48,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733134999] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:48,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:48,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:33:48,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534086167] [2021-12-06 19:33:48,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:48,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:33:48,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:48,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:33:48,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:33:48,177 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 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:48,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:48,856 INFO L93 Difference]: Finished difference Result 857 states and 1498 transitions. [2021-12-06 19:33:48,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:33:48,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-12-06 19:33:48,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:48,870 INFO L225 Difference]: With dead ends: 857 [2021-12-06 19:33:48,870 INFO L226 Difference]: Without dead ends: 462 [2021-12-06 19:33:48,873 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:33:48,876 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 101 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:48,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 187 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 19:33:48,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-12-06 19:33:48,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2021-12-06 19:33:48,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.5381263616557734) internal successors, (706), 459 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:48,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 706 transitions. [2021-12-06 19:33:48,924 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 706 transitions. Word has length 187 [2021-12-06 19:33:48,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:48,924 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 706 transitions. [2021-12-06 19:33:48,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:48,925 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 706 transitions. [2021-12-06 19:33:48,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-06 19:33:48,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:48,929 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 19:33:48,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:33:48,930 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:48,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:48,930 INFO L85 PathProgramCache]: Analyzing trace with hash 365635140, now seen corresponding path program 1 times [2021-12-06 19:33:48,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:48,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770486780] [2021-12-06 19:33:48,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:48,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:33:49,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:49,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770486780] [2021-12-06 19:33:49,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770486780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:49,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:49,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:33:49,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246810950] [2021-12-06 19:33:49,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:49,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:33:49,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:49,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:33:49,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:33:49,009 INFO L87 Difference]: Start difference. First operand 460 states and 706 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:49,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:49,527 INFO L93 Difference]: Finished difference Result 1344 states and 2079 transitions. [2021-12-06 19:33:49,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:33:49,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-12-06 19:33:49,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:49,532 INFO L225 Difference]: With dead ends: 1344 [2021-12-06 19:33:49,532 INFO L226 Difference]: Without dead ends: 886 [2021-12-06 19:33:49,534 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:33:49,535 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:49,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 19:33:49,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-12-06 19:33:49,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 870. [2021-12-06 19:33:49,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.5132336018411967) internal successors, (1315), 869 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:49,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1315 transitions. [2021-12-06 19:33:49,566 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1315 transitions. Word has length 195 [2021-12-06 19:33:49,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:49,566 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1315 transitions. [2021-12-06 19:33:49,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:49,566 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1315 transitions. [2021-12-06 19:33:49,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-06 19:33:49,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:49,570 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-12-06 19:33:49,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 19:33:49,570 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:49,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:49,571 INFO L85 PathProgramCache]: Analyzing trace with hash 750887865, now seen corresponding path program 1 times [2021-12-06 19:33:49,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:49,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086960757] [2021-12-06 19:33:49,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:49,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:33:49,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:49,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086960757] [2021-12-06 19:33:49,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086960757] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:49,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:49,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:33:49,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024067639] [2021-12-06 19:33:49,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:49,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:33:49,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:49,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:33:49,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:33:49,798 INFO L87 Difference]: Start difference. First operand 870 states and 1315 transitions. Second operand has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:50,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:50,448 INFO L93 Difference]: Finished difference Result 1884 states and 2886 transitions. [2021-12-06 19:33:50,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:33:50,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 202 [2021-12-06 19:33:50,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:50,452 INFO L225 Difference]: With dead ends: 1884 [2021-12-06 19:33:50,453 INFO L226 Difference]: Without dead ends: 842 [2021-12-06 19:33:50,454 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:33:50,455 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 331 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:50,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 47 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 19:33:50,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-12-06 19:33:50,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 842. [2021-12-06 19:33:50,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 1.3650416171224733) internal successors, (1148), 841 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:50,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1148 transitions. [2021-12-06 19:33:50,472 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1148 transitions. Word has length 202 [2021-12-06 19:33:50,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:50,473 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1148 transitions. [2021-12-06 19:33:50,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:50,473 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1148 transitions. [2021-12-06 19:33:50,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-12-06 19:33:50,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:50,476 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 19:33:50,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 19:33:50,476 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:50,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:50,477 INFO L85 PathProgramCache]: Analyzing trace with hash 2085657216, now seen corresponding path program 1 times [2021-12-06 19:33:50,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:50,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344226826] [2021-12-06 19:33:50,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:50,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:33:50,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:50,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344226826] [2021-12-06 19:33:50,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344226826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:50,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:50,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:33:50,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631479104] [2021-12-06 19:33:50,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:50,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:33:50,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:50,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:33:50,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:33:50,547 INFO L87 Difference]: Start difference. First operand 842 states and 1148 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) [2021-12-06 19:33:51,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:51,009 INFO L93 Difference]: Finished difference Result 2507 states and 3424 transitions. [2021-12-06 19:33:51,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:33:51,010 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 210 [2021-12-06 19:33:51,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:51,017 INFO L225 Difference]: With dead ends: 2507 [2021-12-06 19:33:51,017 INFO L226 Difference]: Without dead ends: 1667 [2021-12-06 19:33:51,018 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:33:51,019 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 230 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:51,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 49 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:33:51,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2021-12-06 19:33:51,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1658. [2021-12-06 19:33:51,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 1.3566686783343391) internal successors, (2248), 1657 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:51,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2248 transitions. [2021-12-06 19:33:51,053 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2248 transitions. Word has length 210 [2021-12-06 19:33:51,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:51,054 INFO L470 AbstractCegarLoop]: Abstraction has 1658 states and 2248 transitions. [2021-12-06 19:33:51,054 INFO L471 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) [2021-12-06 19:33:51,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2248 transitions. [2021-12-06 19:33:51,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-12-06 19:33:51,057 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:51,058 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:51,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 19:33:51,058 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:51,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:51,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1810228712, now seen corresponding path program 1 times [2021-12-06 19:33:51,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:51,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935576183] [2021-12-06 19:33:51,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:51,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:33:51,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:51,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935576183] [2021-12-06 19:33:51,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935576183] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:51,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:51,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:33:51,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810280270] [2021-12-06 19:33:51,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:51,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:33:51,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:51,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:33:51,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:33:51,116 INFO L87 Difference]: Start difference. First operand 1658 states and 2248 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:51,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:51,534 INFO L93 Difference]: Finished difference Result 4950 states and 6719 transitions. [2021-12-06 19:33:51,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:33:51,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 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 [2021-12-06 19:33:51,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:51,552 INFO L225 Difference]: With dead ends: 4950 [2021-12-06 19:33:51,553 INFO L226 Difference]: Without dead ends: 3294 [2021-12-06 19:33:51,555 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:33:51,557 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 203 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:51,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 119 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:33:51,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3294 states. [2021-12-06 19:33:51,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3294 to 3288. [2021-12-06 19:33:51,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3288 states, 3287 states have (on average 1.3416489199878308) internal successors, (4410), 3287 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3288 states to 3288 states and 4410 transitions. [2021-12-06 19:33:51,647 INFO L78 Accepts]: Start accepts. Automaton has 3288 states and 4410 transitions. Word has length 213 [2021-12-06 19:33:51,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:51,648 INFO L470 AbstractCegarLoop]: Abstraction has 3288 states and 4410 transitions. [2021-12-06 19:33:51,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:51,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3288 states and 4410 transitions. [2021-12-06 19:33:51,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-06 19:33:51,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:51,657 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:51,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 19:33:51,657 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:51,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:51,658 INFO L85 PathProgramCache]: Analyzing trace with hash -2117214179, now seen corresponding path program 1 times [2021-12-06 19:33:51,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:51,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551997311] [2021-12-06 19:33:51,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:51,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:51,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:33:51,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:51,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551997311] [2021-12-06 19:33:51,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551997311] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:51,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:51,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:33:51,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753673571] [2021-12-06 19:33:51,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:51,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:33:51,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:51,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:33:51,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:33:51,745 INFO L87 Difference]: Start difference. First operand 3288 states and 4410 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:52,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:52,214 INFO L93 Difference]: Finished difference Result 9841 states and 13207 transitions. [2021-12-06 19:33:52,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:33:52,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 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 215 [2021-12-06 19:33:52,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:52,239 INFO L225 Difference]: With dead ends: 9841 [2021-12-06 19:33:52,239 INFO L226 Difference]: Without dead ends: 6555 [2021-12-06 19:33:52,242 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:33:52,243 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 204 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:52,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 98 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:33:52,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6555 states. [2021-12-06 19:33:52,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6555 to 6544. [2021-12-06 19:33:52,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6544 states, 6543 states have (on average 1.3195781751490143) internal successors, (8634), 6543 states have internal predecessors, (8634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:52,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6544 states to 6544 states and 8634 transitions. [2021-12-06 19:33:52,353 INFO L78 Accepts]: Start accepts. Automaton has 6544 states and 8634 transitions. Word has length 215 [2021-12-06 19:33:52,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:52,353 INFO L470 AbstractCegarLoop]: Abstraction has 6544 states and 8634 transitions. [2021-12-06 19:33:52,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:52,353 INFO L276 IsEmpty]: Start isEmpty. Operand 6544 states and 8634 transitions. [2021-12-06 19:33:52,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-06 19:33:52,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:52,363 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:52,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 19:33:52,363 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:52,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:52,363 INFO L85 PathProgramCache]: Analyzing trace with hash -731269670, now seen corresponding path program 1 times [2021-12-06 19:33:52,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:52,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110294225] [2021-12-06 19:33:52,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:52,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 19:33:52,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:52,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110294225] [2021-12-06 19:33:52,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110294225] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:52,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:52,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:33:52,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825493277] [2021-12-06 19:33:52,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:52,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:33:52,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:52,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:33:52,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:33:52,421 INFO L87 Difference]: Start difference. First operand 6544 states and 8634 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:52,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:52,888 INFO L93 Difference]: Finished difference Result 16345 states and 21517 transitions. [2021-12-06 19:33:52,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:33:52,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 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 220 [2021-12-06 19:33:52,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:52,922 INFO L225 Difference]: With dead ends: 16345 [2021-12-06 19:33:52,922 INFO L226 Difference]: Without dead ends: 9803 [2021-12-06 19:33:52,928 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:33:52,929 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 223 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:52,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 59 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:33:52,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9803 states. [2021-12-06 19:33:53,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9803 to 9802. [2021-12-06 19:33:53,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9802 states, 9801 states have (on average 1.3046627895112743) internal successors, (12787), 9801 states have internal predecessors, (12787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:53,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9802 states to 9802 states and 12787 transitions. [2021-12-06 19:33:53,076 INFO L78 Accepts]: Start accepts. Automaton has 9802 states and 12787 transitions. Word has length 220 [2021-12-06 19:33:53,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:53,077 INFO L470 AbstractCegarLoop]: Abstraction has 9802 states and 12787 transitions. [2021-12-06 19:33:53,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:53,077 INFO L276 IsEmpty]: Start isEmpty. Operand 9802 states and 12787 transitions. [2021-12-06 19:33:53,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-12-06 19:33:53,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:53,090 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:53,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 19:33:53,091 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:53,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:53,091 INFO L85 PathProgramCache]: Analyzing trace with hash -482896652, now seen corresponding path program 1 times [2021-12-06 19:33:53,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:53,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490670142] [2021-12-06 19:33:53,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:53,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 19:33:53,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:53,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490670142] [2021-12-06 19:33:53,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490670142] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:53,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:53,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:33:53,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789632110] [2021-12-06 19:33:53,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:53,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:33:53,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:53,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:33:53,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:33:53,150 INFO L87 Difference]: Start difference. First operand 9802 states and 12787 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:53,641 INFO L93 Difference]: Finished difference Result 28162 states and 36760 transitions. [2021-12-06 19:33:53,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:33:53,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2021-12-06 19:33:53,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:53,677 INFO L225 Difference]: With dead ends: 28162 [2021-12-06 19:33:53,677 INFO L226 Difference]: Without dead ends: 18362 [2021-12-06 19:33:53,685 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:33:53,686 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 200 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:53,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 112 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:33:53,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18362 states. [2021-12-06 19:33:53,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18362 to 18348. [2021-12-06 19:33:53,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18348 states, 18347 states have (on average 1.300103559164986) internal successors, (23853), 18347 states have internal predecessors, (23853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:53,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18348 states to 18348 states and 23853 transitions. [2021-12-06 19:33:53,925 INFO L78 Accepts]: Start accepts. Automaton has 18348 states and 23853 transitions. Word has length 222 [2021-12-06 19:33:53,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:53,925 INFO L470 AbstractCegarLoop]: Abstraction has 18348 states and 23853 transitions. [2021-12-06 19:33:53,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:53,926 INFO L276 IsEmpty]: Start isEmpty. Operand 18348 states and 23853 transitions. [2021-12-06 19:33:53,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-06 19:33:53,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:53,942 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:53,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 19:33:53,942 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:53,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:53,942 INFO L85 PathProgramCache]: Analyzing trace with hash -849827512, now seen corresponding path program 1 times [2021-12-06 19:33:53,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:53,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321470862] [2021-12-06 19:33:53,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:53,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:33:54,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:54,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321470862] [2021-12-06 19:33:54,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321470862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:54,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:54,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:33:54,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574875043] [2021-12-06 19:33:54,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:54,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:33:54,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:54,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:33:54,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:33:54,006 INFO L87 Difference]: Start difference. First operand 18348 states and 23853 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:54,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:54,564 INFO L93 Difference]: Finished difference Result 41170 states and 53639 transitions. [2021-12-06 19:33:54,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:33:54,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 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 224 [2021-12-06 19:33:54,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:54,601 INFO L225 Difference]: With dead ends: 41170 [2021-12-06 19:33:54,601 INFO L226 Difference]: Without dead ends: 22824 [2021-12-06 19:33:54,616 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:33:54,617 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 209 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:54,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 325 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 19:33:54,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22824 states. [2021-12-06 19:33:54,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22824 to 22821. [2021-12-06 19:33:54,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22821 states, 22820 states have (on average 1.2670902716914987) internal successors, (28915), 22820 states have internal predecessors, (28915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:54,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22821 states to 22821 states and 28915 transitions. [2021-12-06 19:33:54,900 INFO L78 Accepts]: Start accepts. Automaton has 22821 states and 28915 transitions. Word has length 224 [2021-12-06 19:33:54,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:54,900 INFO L470 AbstractCegarLoop]: Abstraction has 22821 states and 28915 transitions. [2021-12-06 19:33:54,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:54,900 INFO L276 IsEmpty]: Start isEmpty. Operand 22821 states and 28915 transitions. [2021-12-06 19:33:54,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-06 19:33:54,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:54,920 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:54,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 19:33:54,920 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:54,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:54,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1365344075, now seen corresponding path program 1 times [2021-12-06 19:33:54,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:54,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142267066] [2021-12-06 19:33:54,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:54,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 19:33:55,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:55,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142267066] [2021-12-06 19:33:55,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142267066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:55,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:55,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:33:55,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915540721] [2021-12-06 19:33:55,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:55,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:33:55,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:55,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:33:55,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:33:55,025 INFO L87 Difference]: Start difference. First operand 22821 states and 28915 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:55,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:55,524 INFO L93 Difference]: Finished difference Result 52760 states and 66786 transitions. [2021-12-06 19:33:55,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:33:55,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 232 [2021-12-06 19:33:55,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:55,562 INFO L225 Difference]: With dead ends: 52760 [2021-12-06 19:33:55,562 INFO L226 Difference]: Without dead ends: 29941 [2021-12-06 19:33:55,577 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:33:55,578 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 199 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:55,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 110 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:33:55,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29941 states. [2021-12-06 19:33:55,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29941 to 29926. [2021-12-06 19:33:55,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29926 states, 29925 states have (on average 1.2470175438596491) internal successors, (37317), 29925 states have internal predecessors, (37317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29926 states to 29926 states and 37317 transitions. [2021-12-06 19:33:55,962 INFO L78 Accepts]: Start accepts. Automaton has 29926 states and 37317 transitions. Word has length 232 [2021-12-06 19:33:55,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:55,962 INFO L470 AbstractCegarLoop]: Abstraction has 29926 states and 37317 transitions. [2021-12-06 19:33:55,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:55,962 INFO L276 IsEmpty]: Start isEmpty. Operand 29926 states and 37317 transitions. [2021-12-06 19:33:55,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-06 19:33:55,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:55,983 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:55,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 19:33:55,983 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:55,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:55,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1298577142, now seen corresponding path program 1 times [2021-12-06 19:33:55,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:55,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534871520] [2021-12-06 19:33:55,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:55,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 19:33:56,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:56,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534871520] [2021-12-06 19:33:56,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534871520] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:33:56,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074700069] [2021-12-06 19:33:56,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:56,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:33:56,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:33:56,047 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:33:56,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:33:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:56,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:33:56,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:33:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 19:33:56,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:33:56,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074700069] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:56,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:33:56,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-06 19:33:56,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984938730] [2021-12-06 19:33:56,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:56,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:33:56,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:56,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:33:56,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:33:56,370 INFO L87 Difference]: Start difference. First operand 29926 states and 37317 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 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) [2021-12-06 19:33:56,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:56,947 INFO L93 Difference]: Finished difference Result 78565 states and 98208 transitions. [2021-12-06 19:33:56,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:33:56,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 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 239 [2021-12-06 19:33:56,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:56,993 INFO L225 Difference]: With dead ends: 78565 [2021-12-06 19:33:56,993 INFO L226 Difference]: Without dead ends: 48844 [2021-12-06 19:33:57,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:33:57,010 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 223 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:57,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 86 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:33:57,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48844 states. [2021-12-06 19:33:57,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48844 to 48840. [2021-12-06 19:33:57,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48840 states, 48839 states have (on average 1.2334609635741927) internal successors, (60241), 48839 states have internal predecessors, (60241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:57,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48840 states to 48840 states and 60241 transitions. [2021-12-06 19:33:57,562 INFO L78 Accepts]: Start accepts. Automaton has 48840 states and 60241 transitions. Word has length 239 [2021-12-06 19:33:57,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:57,562 INFO L470 AbstractCegarLoop]: Abstraction has 48840 states and 60241 transitions. [2021-12-06 19:33:57,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 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) [2021-12-06 19:33:57,562 INFO L276 IsEmpty]: Start isEmpty. Operand 48840 states and 60241 transitions. [2021-12-06 19:33:57,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-06 19:33:57,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:57,587 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:57,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:33:57,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:33:57,789 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:57,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:57,791 INFO L85 PathProgramCache]: Analyzing trace with hash 442940795, now seen corresponding path program 1 times [2021-12-06 19:33:57,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:57,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659801851] [2021-12-06 19:33:57,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:57,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 19:33:57,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:57,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659801851] [2021-12-06 19:33:57,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659801851] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:33:57,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893705857] [2021-12-06 19:33:57,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:57,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:33:57,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:33:57,907 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:33:57,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:33:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:58,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:33:58,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:33:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-06 19:33:58,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:33:58,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893705857] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:58,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:33:58,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-06 19:33:58,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349914372] [2021-12-06 19:33:58,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:58,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:33:58,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:58,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:33:58,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:33:58,248 INFO L87 Difference]: Start difference. First operand 48840 states and 60241 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:58,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:58,933 INFO L93 Difference]: Finished difference Result 109452 states and 135865 transitions. [2021-12-06 19:33:58,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:33:58,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 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 241 [2021-12-06 19:33:58,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:58,993 INFO L225 Difference]: With dead ends: 109452 [2021-12-06 19:33:58,993 INFO L226 Difference]: Without dead ends: 60817 [2021-12-06 19:33:59,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:33:59,018 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 203 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:59,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 113 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:33:59,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60817 states. [2021-12-06 19:33:59,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60817 to 60407. [2021-12-06 19:33:59,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60407 states, 60406 states have (on average 1.1477998874284012) internal successors, (69334), 60406 states have internal predecessors, (69334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:59,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60407 states to 60407 states and 69334 transitions. [2021-12-06 19:33:59,641 INFO L78 Accepts]: Start accepts. Automaton has 60407 states and 69334 transitions. Word has length 241 [2021-12-06 19:33:59,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:59,641 INFO L470 AbstractCegarLoop]: Abstraction has 60407 states and 69334 transitions. [2021-12-06 19:33:59,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:59,642 INFO L276 IsEmpty]: Start isEmpty. Operand 60407 states and 69334 transitions. [2021-12-06 19:33:59,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-12-06 19:33:59,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:59,658 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 19:33:59,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 19:33:59,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:33:59,860 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:59,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:59,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1785964666, now seen corresponding path program 1 times [2021-12-06 19:33:59,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:59,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124414213] [2021-12-06 19:33:59,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:59,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:59,955 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 19:33:59,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:59,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124414213] [2021-12-06 19:33:59,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124414213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:59,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:59,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:33:59,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320117231] [2021-12-06 19:33:59,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:59,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:33:59,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:59,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:33:59,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:33:59,956 INFO L87 Difference]: Start difference. First operand 60407 states and 69334 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) [2021-12-06 19:34:00,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:34:00,789 INFO L93 Difference]: Finished difference Result 151120 states and 173402 transitions. [2021-12-06 19:34:00,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:34:00,790 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 249 [2021-12-06 19:34:00,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:34:00,884 INFO L225 Difference]: With dead ends: 151120 [2021-12-06 19:34:00,884 INFO L226 Difference]: Without dead ends: 91324 [2021-12-06 19:34:00,922 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:34:00,923 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 217 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:34:00,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 126 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:34:00,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91324 states. [2021-12-06 19:34:01,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91324 to 91317. [2021-12-06 19:34:01,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91317 states, 91316 states have (on average 1.1436988041526128) internal successors, (104438), 91316 states have internal predecessors, (104438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:01,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91317 states to 91317 states and 104438 transitions. [2021-12-06 19:34:01,913 INFO L78 Accepts]: Start accepts. Automaton has 91317 states and 104438 transitions. Word has length 249 [2021-12-06 19:34:01,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:34:01,913 INFO L470 AbstractCegarLoop]: Abstraction has 91317 states and 104438 transitions. [2021-12-06 19:34:01,913 INFO L471 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) [2021-12-06 19:34:01,913 INFO L276 IsEmpty]: Start isEmpty. Operand 91317 states and 104438 transitions. [2021-12-06 19:34:01,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-12-06 19:34:01,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:34:01,937 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:34:01,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 19:34:01,937 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:34:01,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:34:01,937 INFO L85 PathProgramCache]: Analyzing trace with hash -669456393, now seen corresponding path program 1 times [2021-12-06 19:34:01,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:34:01,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848642914] [2021-12-06 19:34:01,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:01,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:34:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:34:02,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:34:02,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848642914] [2021-12-06 19:34:02,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848642914] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:34:02,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:34:02,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:34:02,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107276624] [2021-12-06 19:34:02,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:34:02,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:34:02,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:34:02,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:34:02,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:34:02,020 INFO L87 Difference]: Start difference. First operand 91317 states and 104438 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 2 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:02,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:34:02,916 INFO L93 Difference]: Finished difference Result 181619 states and 207792 transitions. [2021-12-06 19:34:02,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:34:02,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 2 states have internal predecessors, (261), 0 states have call successors, (0), 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 261 [2021-12-06 19:34:02,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:34:02,999 INFO L225 Difference]: With dead ends: 181619 [2021-12-06 19:34:02,999 INFO L226 Difference]: Without dead ends: 91522 [2021-12-06 19:34:03,025 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:34:03,025 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 133 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:34:03,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 128 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:34:03,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91522 states. [2021-12-06 19:34:03,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91522 to 91520. [2021-12-06 19:34:03,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91520 states, 91519 states have (on average 1.143434696620374) internal successors, (104646), 91519 states have internal predecessors, (104646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:03,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91520 states to 91520 states and 104646 transitions. [2021-12-06 19:34:03,917 INFO L78 Accepts]: Start accepts. Automaton has 91520 states and 104646 transitions. Word has length 261 [2021-12-06 19:34:03,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:34:03,918 INFO L470 AbstractCegarLoop]: Abstraction has 91520 states and 104646 transitions. [2021-12-06 19:34:03,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 2 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:03,918 INFO L276 IsEmpty]: Start isEmpty. Operand 91520 states and 104646 transitions. [2021-12-06 19:34:03,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-12-06 19:34:03,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:34:03,942 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:34:03,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 19:34:03,942 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:34:03,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:34:03,943 INFO L85 PathProgramCache]: Analyzing trace with hash 2089670850, now seen corresponding path program 1 times [2021-12-06 19:34:03,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:34:03,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233605034] [2021-12-06 19:34:03,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:03,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:34:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:34:04,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:34:04,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233605034] [2021-12-06 19:34:04,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233605034] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:34:04,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:34:04,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:34:04,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231733189] [2021-12-06 19:34:04,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:34:04,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:34:04,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:34:04,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:34:04,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:34:04,029 INFO L87 Difference]: Start difference. First operand 91520 states and 104646 transitions. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:05,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:34:05,163 INFO L93 Difference]: Finished difference Result 161506 states and 185075 transitions. [2021-12-06 19:34:05,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:34:05,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 289 [2021-12-06 19:34:05,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:34:05,276 INFO L225 Difference]: With dead ends: 161506 [2021-12-06 19:34:05,276 INFO L226 Difference]: Without dead ends: 101710 [2021-12-06 19:34:05,309 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:34:05,310 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 352 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:34:05,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 86 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 19:34:05,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101710 states. [2021-12-06 19:34:06,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101710 to 101691. [2021-12-06 19:34:06,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101691 states, 101690 states have (on average 1.1378404956239552) internal successors, (115707), 101690 states have internal predecessors, (115707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:06,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101691 states to 101691 states and 115707 transitions. [2021-12-06 19:34:06,504 INFO L78 Accepts]: Start accepts. Automaton has 101691 states and 115707 transitions. Word has length 289 [2021-12-06 19:34:06,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:34:06,504 INFO L470 AbstractCegarLoop]: Abstraction has 101691 states and 115707 transitions. [2021-12-06 19:34:06,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:06,505 INFO L276 IsEmpty]: Start isEmpty. Operand 101691 states and 115707 transitions. [2021-12-06 19:34:06,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-12-06 19:34:06,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:34:06,544 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 19:34:06,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 19:34:06,544 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:34:06,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:34:06,545 INFO L85 PathProgramCache]: Analyzing trace with hash -836598297, now seen corresponding path program 1 times [2021-12-06 19:34:06,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:34:06,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636382341] [2021-12-06 19:34:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:06,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:34:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 81 proven. 6 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-06 19:34:06,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:34:06,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636382341] [2021-12-06 19:34:06,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636382341] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:34:06,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215818479] [2021-12-06 19:34:06,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:06,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:34:06,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:34:06,633 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:34:06,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 19:34:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:06,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:34:06,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:34:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-06 19:34:07,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:34:07,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215818479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:34:07,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:34:07,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-06 19:34:07,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817693687] [2021-12-06 19:34:07,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:34:07,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:34:07,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:34:07,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:34:07,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:34:07,036 INFO L87 Difference]: Start difference. First operand 101691 states and 115707 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:07,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:34:07,931 INFO L93 Difference]: Finished difference Result 201559 states and 229457 transitions. [2021-12-06 19:34:07,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:34:07,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 [2021-12-06 19:34:07,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:34:08,045 INFO L225 Difference]: With dead ends: 201559 [2021-12-06 19:34:08,045 INFO L226 Difference]: Without dead ends: 101291 [2021-12-06 19:34:08,087 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:34:08,088 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 73 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:34:08,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 277 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 19:34:08,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101291 states. [2021-12-06 19:34:09,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101291 to 100879. [2021-12-06 19:34:09,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100879 states, 100878 states have (on average 1.1298102658656992) internal successors, (113973), 100878 states have internal predecessors, (113973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:09,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100879 states to 100879 states and 113973 transitions. [2021-12-06 19:34:09,207 INFO L78 Accepts]: Start accepts. Automaton has 100879 states and 113973 transitions. Word has length 304 [2021-12-06 19:34:09,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:34:09,207 INFO L470 AbstractCegarLoop]: Abstraction has 100879 states and 113973 transitions. [2021-12-06 19:34:09,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:09,208 INFO L276 IsEmpty]: Start isEmpty. Operand 100879 states and 113973 transitions. [2021-12-06 19:34:09,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-12-06 19:34:09,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:34:09,243 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 19:34:09,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 19:34:09,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:34:09,445 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:34:09,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:34:09,447 INFO L85 PathProgramCache]: Analyzing trace with hash 17442066, now seen corresponding path program 1 times [2021-12-06 19:34:09,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:34:09,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782880684] [2021-12-06 19:34:09,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:09,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:34:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 106 proven. 6 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-06 19:34:09,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:34:09,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782880684] [2021-12-06 19:34:09,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782880684] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:34:09,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924486306] [2021-12-06 19:34:09,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:09,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:34:09,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:34:09,564 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:34:09,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 19:34:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:09,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:34:09,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:34:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-06 19:34:09,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:34:09,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924486306] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:34:09,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:34:09,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-06 19:34:09,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092465373] [2021-12-06 19:34:09,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:34:09,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:34:09,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:34:09,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:34:09,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:34:09,972 INFO L87 Difference]: Start difference. First operand 100879 states and 113973 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:10,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:34:10,877 INFO L93 Difference]: Finished difference Result 186078 states and 209865 transitions. [2021-12-06 19:34:10,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:34:10,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 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 323 [2021-12-06 19:34:10,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:34:11,007 INFO L225 Difference]: With dead ends: 186078 [2021-12-06 19:34:11,007 INFO L226 Difference]: Without dead ends: 118547 [2021-12-06 19:34:11,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:34:11,038 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 81 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:34:11,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 56 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:34:11,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118547 states. [2021-12-06 19:34:12,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118547 to 117525. [2021-12-06 19:34:12,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117525 states, 117524 states have (on average 1.1249872366495355) internal successors, (132213), 117524 states have internal predecessors, (132213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:12,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117525 states to 117525 states and 132213 transitions. [2021-12-06 19:34:12,427 INFO L78 Accepts]: Start accepts. Automaton has 117525 states and 132213 transitions. Word has length 323 [2021-12-06 19:34:12,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:34:12,427 INFO L470 AbstractCegarLoop]: Abstraction has 117525 states and 132213 transitions. [2021-12-06 19:34:12,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:12,428 INFO L276 IsEmpty]: Start isEmpty. Operand 117525 states and 132213 transitions. [2021-12-06 19:34:12,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-12-06 19:34:12,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:34:12,464 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2021-12-06 19:34:12,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 19:34:12,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 19:34:12,667 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:34:12,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:34:12,668 INFO L85 PathProgramCache]: Analyzing trace with hash 625486579, now seen corresponding path program 1 times [2021-12-06 19:34:12,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:34:12,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063232178] [2021-12-06 19:34:12,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:12,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:34:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 144 proven. 6 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-12-06 19:34:12,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:34:12,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063232178] [2021-12-06 19:34:12,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063232178] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:34:12,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918069721] [2021-12-06 19:34:12,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:12,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:34:12,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:34:12,779 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:34:12,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 19:34:12,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:12,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:34:12,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:34:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-06 19:34:13,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:34:13,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918069721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:34:13,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:34:13,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-06 19:34:13,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264234006] [2021-12-06 19:34:13,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:34:13,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:34:13,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:34:13,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:34:13,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:34:13,141 INFO L87 Difference]: Start difference. First operand 117525 states and 132213 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:14,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:34:14,063 INFO L93 Difference]: Finished difference Result 208411 states and 233314 transitions. [2021-12-06 19:34:14,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:34:14,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 [2021-12-06 19:34:14,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:34:14,157 INFO L225 Difference]: With dead ends: 208411 [2021-12-06 19:34:14,157 INFO L226 Difference]: Without dead ends: 92106 [2021-12-06 19:34:14,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:34:14,194 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 211 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:34:14,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 288 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:34:14,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92106 states. [2021-12-06 19:34:15,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92106 to 83573. [2021-12-06 19:34:15,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83573 states, 83572 states have (on average 1.0924591968601924) internal successors, (91299), 83572 states have internal predecessors, (91299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:15,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83573 states to 83573 states and 91299 transitions. [2021-12-06 19:34:15,188 INFO L78 Accepts]: Start accepts. Automaton has 83573 states and 91299 transitions. Word has length 324 [2021-12-06 19:34:15,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:34:15,188 INFO L470 AbstractCegarLoop]: Abstraction has 83573 states and 91299 transitions. [2021-12-06 19:34:15,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:15,189 INFO L276 IsEmpty]: Start isEmpty. Operand 83573 states and 91299 transitions. [2021-12-06 19:34:15,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-12-06 19:34:15,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:34:15,218 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 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] [2021-12-06 19:34:15,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 19:34:15,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 19:34:15,420 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:34:15,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:34:15,422 INFO L85 PathProgramCache]: Analyzing trace with hash 854175643, now seen corresponding path program 1 times [2021-12-06 19:34:15,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:34:15,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000230435] [2021-12-06 19:34:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:15,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:34:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 145 proven. 6 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-12-06 19:34:15,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:34:15,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000230435] [2021-12-06 19:34:15,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000230435] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:34:15,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527942388] [2021-12-06 19:34:15,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:15,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:34:15,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:34:15,542 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:34:15,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 19:34:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:15,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:34:15,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:34:15,892 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 273 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-06 19:34:15,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:34:15,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527942388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:34:15,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:34:15,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-06 19:34:15,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768297514] [2021-12-06 19:34:15,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:34:15,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:34:15,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:34:15,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:34:15,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:34:15,894 INFO L87 Difference]: Start difference. First operand 83573 states and 91299 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:16,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:34:16,780 INFO L93 Difference]: Finished difference Result 174069 states and 190574 transitions. [2021-12-06 19:34:16,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:34:16,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 328 [2021-12-06 19:34:16,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:34:16,887 INFO L225 Difference]: With dead ends: 174069 [2021-12-06 19:34:16,887 INFO L226 Difference]: Without dead ends: 91919 [2021-12-06 19:34:16,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:34:16,907 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 200 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:34:16,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 311 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:34:16,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91919 states. [2021-12-06 19:34:17,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91919 to 90692. [2021-12-06 19:34:17,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90692 states, 90691 states have (on average 1.0924457774200307) internal successors, (99075), 90691 states have internal predecessors, (99075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:18,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90692 states to 90692 states and 99075 transitions. [2021-12-06 19:34:18,051 INFO L78 Accepts]: Start accepts. Automaton has 90692 states and 99075 transitions. Word has length 328 [2021-12-06 19:34:18,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:34:18,051 INFO L470 AbstractCegarLoop]: Abstraction has 90692 states and 99075 transitions. [2021-12-06 19:34:18,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:18,052 INFO L276 IsEmpty]: Start isEmpty. Operand 90692 states and 99075 transitions. [2021-12-06 19:34:18,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-12-06 19:34:18,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:34:18,082 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:34:18,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-06 19:34:18,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:34:18,285 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:34:18,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:34:18,286 INFO L85 PathProgramCache]: Analyzing trace with hash 19103636, now seen corresponding path program 1 times [2021-12-06 19:34:18,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:34:18,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156337074] [2021-12-06 19:34:18,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:18,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:34:18,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-06 19:34:18,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:34:18,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156337074] [2021-12-06 19:34:18,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156337074] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:34:18,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677678006] [2021-12-06 19:34:18,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:18,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:34:18,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:34:18,378 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:34:18,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 19:34:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:18,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:34:18,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:34:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-06 19:34:18,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:34:18,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677678006] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:34:18,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:34:18,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-06 19:34:18,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412830310] [2021-12-06 19:34:18,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:34:18,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:34:18,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:34:18,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:34:18,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:34:18,770 INFO L87 Difference]: Start difference. First operand 90692 states and 99075 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:19,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:34:19,534 INFO L93 Difference]: Finished difference Result 174909 states and 191130 transitions. [2021-12-06 19:34:19,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:34:19,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 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 328 [2021-12-06 19:34:19,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:34:19,623 INFO L225 Difference]: With dead ends: 174909 [2021-12-06 19:34:19,623 INFO L226 Difference]: Without dead ends: 84828 [2021-12-06 19:34:19,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:34:19,664 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 36 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:34:19,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 325 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:34:19,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84828 states. [2021-12-06 19:34:20,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84828 to 84805. [2021-12-06 19:34:20,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84805 states, 84804 states have (on average 1.0876255836988822) internal successors, (92235), 84804 states have internal predecessors, (92235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:20,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84805 states to 84805 states and 92235 transitions. [2021-12-06 19:34:20,730 INFO L78 Accepts]: Start accepts. Automaton has 84805 states and 92235 transitions. Word has length 328 [2021-12-06 19:34:20,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:34:20,731 INFO L470 AbstractCegarLoop]: Abstraction has 84805 states and 92235 transitions. [2021-12-06 19:34:20,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:20,731 INFO L276 IsEmpty]: Start isEmpty. Operand 84805 states and 92235 transitions. [2021-12-06 19:34:20,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-12-06 19:34:20,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:34:20,761 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2021-12-06 19:34:20,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 19:34:20,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-12-06 19:34:20,963 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:34:20,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:34:20,965 INFO L85 PathProgramCache]: Analyzing trace with hash -114782023, now seen corresponding path program 1 times [2021-12-06 19:34:20,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:34:20,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191740316] [2021-12-06 19:34:20,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:20,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:34:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 233 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-06 19:34:21,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:34:21,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191740316] [2021-12-06 19:34:21,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191740316] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:34:21,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:34:21,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:34:21,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383144712] [2021-12-06 19:34:21,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:34:21,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:34:21,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:34:21,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:34:21,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:34:21,080 INFO L87 Difference]: Start difference. First operand 84805 states and 92235 transitions. Second operand has 4 states, 4 states have (on average 68.5) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:22,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:34:22,125 INFO L93 Difference]: Finished difference Result 169844 states and 184913 transitions. [2021-12-06 19:34:22,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:34:22,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.5) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 334 [2021-12-06 19:34:22,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:34:22,205 INFO L225 Difference]: With dead ends: 169844 [2021-12-06 19:34:22,205 INFO L226 Difference]: Without dead ends: 81184 [2021-12-06 19:34:22,220 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:34:22,221 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 382 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:34:22,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 86 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 19:34:22,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81184 states. [2021-12-06 19:34:22,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81184 to 66122. [2021-12-06 19:34:22,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66122 states, 66121 states have (on average 1.084027767275147) internal successors, (71677), 66121 states have internal predecessors, (71677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:23,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66122 states to 66122 states and 71677 transitions. [2021-12-06 19:34:23,004 INFO L78 Accepts]: Start accepts. Automaton has 66122 states and 71677 transitions. Word has length 334 [2021-12-06 19:34:23,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:34:23,004 INFO L470 AbstractCegarLoop]: Abstraction has 66122 states and 71677 transitions. [2021-12-06 19:34:23,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.5) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:23,004 INFO L276 IsEmpty]: Start isEmpty. Operand 66122 states and 71677 transitions. [2021-12-06 19:34:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-12-06 19:34:23,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:34:23,030 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 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] [2021-12-06 19:34:23,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 19:34:23,030 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:34:23,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:34:23,031 INFO L85 PathProgramCache]: Analyzing trace with hash 683726884, now seen corresponding path program 1 times [2021-12-06 19:34:23,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:34:23,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948648365] [2021-12-06 19:34:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:23,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:34:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 145 proven. 6 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-12-06 19:34:23,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:34:23,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948648365] [2021-12-06 19:34:23,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948648365] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:34:23,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478109091] [2021-12-06 19:34:23,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:23,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:34:23,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:34:23,132 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:34:23,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 19:34:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:23,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:34:23,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:34:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-12-06 19:34:23,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:34:23,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478109091] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:34:23,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:34:23,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-06 19:34:23,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098448306] [2021-12-06 19:34:23,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:34:23,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:34:23,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:34:23,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:34:23,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:34:23,541 INFO L87 Difference]: Start difference. First operand 66122 states and 71677 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) [2021-12-06 19:34:24,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:34:24,117 INFO L93 Difference]: Finished difference Result 107620 states and 116504 transitions. [2021-12-06 19:34:24,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:34:24,118 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 341 [2021-12-06 19:34:24,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:34:24,159 INFO L225 Difference]: With dead ends: 107620 [2021-12-06 19:34:24,159 INFO L226 Difference]: Without dead ends: 45769 [2021-12-06 19:34:24,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:34:24,181 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 51 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:34:24,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 300 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:34:24,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45769 states. [2021-12-06 19:34:24,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45769 to 43940. [2021-12-06 19:34:24,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43940 states, 43939 states have (on average 1.0712806390677985) internal successors, (47071), 43939 states have internal predecessors, (47071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:24,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43940 states to 43940 states and 47071 transitions. [2021-12-06 19:34:24,830 INFO L78 Accepts]: Start accepts. Automaton has 43940 states and 47071 transitions. Word has length 341 [2021-12-06 19:34:24,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:34:24,830 INFO L470 AbstractCegarLoop]: Abstraction has 43940 states and 47071 transitions. [2021-12-06 19:34:24,831 INFO L471 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) [2021-12-06 19:34:24,831 INFO L276 IsEmpty]: Start isEmpty. Operand 43940 states and 47071 transitions. [2021-12-06 19:34:24,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2021-12-06 19:34:24,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:34:24,860 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:34:24,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 19:34:25,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:34:25,063 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:34:25,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:34:25,064 INFO L85 PathProgramCache]: Analyzing trace with hash -358666265, now seen corresponding path program 1 times [2021-12-06 19:34:25,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:34:25,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723701631] [2021-12-06 19:34:25,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:25,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:34:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-12-06 19:34:25,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:34:25,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723701631] [2021-12-06 19:34:25,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723701631] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:34:25,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317480662] [2021-12-06 19:34:25,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:25,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:34:25,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:34:25,192 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:34:25,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 19:34:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:25,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:34:25,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:34:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 211 proven. 37 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 19:34:25,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:34:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 211 proven. 37 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 19:34:25,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317480662] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:34:25,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:34:25,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-12-06 19:34:25,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32675040] [2021-12-06 19:34:25,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:34:25,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:34:25,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:34:25,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:34:25,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:34:25,838 INFO L87 Difference]: Start difference. First operand 43940 states and 47071 transitions. Second operand has 6 states, 6 states have (on average 61.5) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:27,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:34:27,313 INFO L93 Difference]: Finished difference Result 125958 states and 135243 transitions. [2021-12-06 19:34:27,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:34:27,314 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 61.5) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 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 363 [2021-12-06 19:34:27,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:34:27,387 INFO L225 Difference]: With dead ends: 125958 [2021-12-06 19:34:27,387 INFO L226 Difference]: Without dead ends: 85883 [2021-12-06 19:34:27,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 723 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:34:27,411 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 1733 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1998 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1733 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 1998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:34:27,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1733 Valid, 146 Invalid, 2454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 1998 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 19:34:27,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85883 states. [2021-12-06 19:34:28,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85883 to 67961. [2021-12-06 19:34:28,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67961 states, 67960 states have (on average 1.0697763390229547) internal successors, (72702), 67960 states have internal predecessors, (72702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:28,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67961 states to 67961 states and 72702 transitions. [2021-12-06 19:34:28,259 INFO L78 Accepts]: Start accepts. Automaton has 67961 states and 72702 transitions. Word has length 363 [2021-12-06 19:34:28,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:34:28,259 INFO L470 AbstractCegarLoop]: Abstraction has 67961 states and 72702 transitions. [2021-12-06 19:34:28,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 61.5) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:28,260 INFO L276 IsEmpty]: Start isEmpty. Operand 67961 states and 72702 transitions. [2021-12-06 19:34:28,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-12-06 19:34:28,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:34:28,276 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:34:28,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 19:34:28,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 19:34:28,478 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:34:28,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:34:28,479 INFO L85 PathProgramCache]: Analyzing trace with hash -197989756, now seen corresponding path program 1 times [2021-12-06 19:34:28,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:34:28,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902747619] [2021-12-06 19:34:28,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:28,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:34:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:28,620 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-06 19:34:28,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:34:28,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902747619] [2021-12-06 19:34:28,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902747619] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:34:28,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:34:28,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:34:28,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697903342] [2021-12-06 19:34:28,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:34:28,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:34:28,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:34:28,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:34:28,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:34:28,621 INFO L87 Difference]: Start difference. First operand 67961 states and 72702 transitions. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 2 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:29,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:34:29,308 INFO L93 Difference]: Finished difference Result 142650 states and 152632 transitions. [2021-12-06 19:34:29,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:34:29,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 2 states have internal predecessors, (318), 0 states have call successors, (0), 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 378 [2021-12-06 19:34:29,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:34:29,376 INFO L225 Difference]: With dead ends: 142650 [2021-12-06 19:34:29,377 INFO L226 Difference]: Without dead ends: 75300 [2021-12-06 19:34:29,405 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:34:29,406 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 105 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:34:29,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 86 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:34:29,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75300 states. [2021-12-06 19:34:30,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75300 to 74278. [2021-12-06 19:34:30,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74278 states, 74277 states have (on average 1.0687426794297024) internal successors, (79383), 74277 states have internal predecessors, (79383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74278 states to 74278 states and 79383 transitions. [2021-12-06 19:34:30,269 INFO L78 Accepts]: Start accepts. Automaton has 74278 states and 79383 transitions. Word has length 378 [2021-12-06 19:34:30,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:34:30,269 INFO L470 AbstractCegarLoop]: Abstraction has 74278 states and 79383 transitions. [2021-12-06 19:34:30,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 2 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:30,269 INFO L276 IsEmpty]: Start isEmpty. Operand 74278 states and 79383 transitions. [2021-12-06 19:34:30,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-12-06 19:34:30,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:34:30,290 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 19:34:30,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 19:34:30,290 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:34:30,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:34:30,291 INFO L85 PathProgramCache]: Analyzing trace with hash 706368500, now seen corresponding path program 1 times [2021-12-06 19:34:30,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:34:30,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796097621] [2021-12-06 19:34:30,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:30,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:34:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 212 proven. 6 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-06 19:34:30,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:34:30,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796097621] [2021-12-06 19:34:30,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796097621] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:34:30,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389829665] [2021-12-06 19:34:30,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:30,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:34:30,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:34:30,401 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:34:30,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 19:34:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:30,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:34:30,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:34:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-12-06 19:34:30,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:34:30,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389829665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:34:30,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:34:30,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-06 19:34:30,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911935454] [2021-12-06 19:34:30,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:34:30,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:34:30,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:34:30,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:34:30,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:34:30,814 INFO L87 Difference]: Start difference. First operand 74278 states and 79383 transitions. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:31,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:34:31,398 INFO L93 Difference]: Finished difference Result 192302 states and 205397 transitions. [2021-12-06 19:34:31,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:34:31,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 0 states have call successors, (0), 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 385 [2021-12-06 19:34:31,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:34:31,516 INFO L225 Difference]: With dead ends: 192302 [2021-12-06 19:34:31,516 INFO L226 Difference]: Without dead ends: 119043 [2021-12-06 19:34:31,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:34:31,701 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 181 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:34:31,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 479 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:34:31,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119043 states. [2021-12-06 19:34:32,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119043 to 117199. [2021-12-06 19:34:32,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117199 states, 117198 states have (on average 1.0668782743732828) internal successors, (125036), 117198 states have internal predecessors, (125036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:32,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117199 states to 117199 states and 125036 transitions. [2021-12-06 19:34:32,966 INFO L78 Accepts]: Start accepts. Automaton has 117199 states and 125036 transitions. Word has length 385 [2021-12-06 19:34:32,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:34:32,966 INFO L470 AbstractCegarLoop]: Abstraction has 117199 states and 125036 transitions. [2021-12-06 19:34:32,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:32,966 INFO L276 IsEmpty]: Start isEmpty. Operand 117199 states and 125036 transitions. [2021-12-06 19:34:32,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-12-06 19:34:32,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:34:32,984 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:34:33,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 19:34:33,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:34:33,186 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:34:33,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:34:33,187 INFO L85 PathProgramCache]: Analyzing trace with hash -242842336, now seen corresponding path program 1 times [2021-12-06 19:34:33,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:34:33,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440242648] [2021-12-06 19:34:33,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:33,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:34:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 251 proven. 9 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-06 19:34:33,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:34:33,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440242648] [2021-12-06 19:34:33,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440242648] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:34:33,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242925470] [2021-12-06 19:34:33,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:33,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:34:33,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:34:33,315 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:34:33,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 19:34:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:33,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:34:33,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:34:33,710 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-12-06 19:34:33,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:34:33,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242925470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:34:33,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:34:33,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-06 19:34:33,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315958276] [2021-12-06 19:34:33,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:34:33,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:34:33,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:34:33,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:34:33,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:34:33,711 INFO L87 Difference]: Start difference. First operand 117199 states and 125036 transitions. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:34,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:34:34,655 INFO L93 Difference]: Finished difference Result 227509 states and 242829 transitions. [2021-12-06 19:34:34,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:34:34,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 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 408 [2021-12-06 19:34:34,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:34:34,771 INFO L225 Difference]: With dead ends: 227509 [2021-12-06 19:34:34,772 INFO L226 Difference]: Without dead ends: 111327 [2021-12-06 19:34:34,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:34:34,806 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 210 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:34:34,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 338 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:34:34,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111327 states. [2021-12-06 19:34:35,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111327 to 96668. [2021-12-06 19:34:35,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96668 states, 96667 states have (on average 1.0628135765049087) internal successors, (102739), 96667 states have internal predecessors, (102739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:35,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96668 states to 96668 states and 102739 transitions. [2021-12-06 19:34:35,934 INFO L78 Accepts]: Start accepts. Automaton has 96668 states and 102739 transitions. Word has length 408 [2021-12-06 19:34:35,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:34:35,934 INFO L470 AbstractCegarLoop]: Abstraction has 96668 states and 102739 transitions. [2021-12-06 19:34:35,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:35,934 INFO L276 IsEmpty]: Start isEmpty. Operand 96668 states and 102739 transitions. [2021-12-06 19:34:35,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2021-12-06 19:34:35,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:34:35,955 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2021-12-06 19:34:35,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 19:34:36,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 19:34:36,157 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:34:36,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:34:36,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1182220535, now seen corresponding path program 1 times [2021-12-06 19:34:36,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:34:36,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314817709] [2021-12-06 19:34:36,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:36,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:34:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 343 proven. 143 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 19:34:36,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:34:36,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314817709] [2021-12-06 19:34:36,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314817709] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:34:36,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182886633] [2021-12-06 19:34:36,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:36,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:34:36,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:34:36,427 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:34:36,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 19:34:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:36,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:34:36,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:34:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 390 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-06 19:34:37,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:34:37,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182886633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:34:37,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:34:37,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-06 19:34:37,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166158449] [2021-12-06 19:34:37,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:34:37,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:34:37,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:34:37,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:34:37,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:34:37,096 INFO L87 Difference]: Start difference. First operand 96668 states and 102739 transitions. Second operand has 4 states, 4 states have (on average 82.5) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:38,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:34:38,221 INFO L93 Difference]: Finished difference Result 251117 states and 267291 transitions. [2021-12-06 19:34:38,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:34:38,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 82.5) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 438 [2021-12-06 19:34:38,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:34:38,372 INFO L225 Difference]: With dead ends: 251117 [2021-12-06 19:34:38,372 INFO L226 Difference]: Without dead ends: 155466 [2021-12-06 19:34:38,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:34:38,424 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 352 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:34:38,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 288 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 19:34:38,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155466 states. [2021-12-06 19:34:39,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155466 to 136768. [2021-12-06 19:34:39,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136768 states, 136767 states have (on average 1.063282809449648) internal successors, (145422), 136767 states have internal predecessors, (145422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:40,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136768 states to 136768 states and 145422 transitions. [2021-12-06 19:34:40,081 INFO L78 Accepts]: Start accepts. Automaton has 136768 states and 145422 transitions. Word has length 438 [2021-12-06 19:34:40,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:34:40,082 INFO L470 AbstractCegarLoop]: Abstraction has 136768 states and 145422 transitions. [2021-12-06 19:34:40,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.5) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:40,082 INFO L276 IsEmpty]: Start isEmpty. Operand 136768 states and 145422 transitions. [2021-12-06 19:34:40,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-12-06 19:34:40,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:34:40,107 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:34:40,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 19:34:40,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 19:34:40,309 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:34:40,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:34:40,310 INFO L85 PathProgramCache]: Analyzing trace with hash -867872415, now seen corresponding path program 1 times [2021-12-06 19:34:40,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:34:40,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568860962] [2021-12-06 19:34:40,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:40,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:34:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 526 proven. 143 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-06 19:34:40,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:34:40,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568860962] [2021-12-06 19:34:40,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568860962] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:34:40,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267676652] [2021-12-06 19:34:40,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:40,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:34:40,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:34:40,586 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:34:40,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 19:34:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:40,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:34:40,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:34:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 670 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-06 19:34:41,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:34:41,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267676652] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:34:41,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:34:41,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-06 19:34:41,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739814732] [2021-12-06 19:34:41,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:34:41,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:34:41,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:34:41,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:34:41,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:34:41,197 INFO L87 Difference]: Start difference. First operand 136768 states and 145422 transitions. Second operand has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:42,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:34:42,550 INFO L93 Difference]: Finished difference Result 274197 states and 291710 transitions. [2021-12-06 19:34:42,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:34:42,551 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 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 507 [2021-12-06 19:34:42,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:34:42,702 INFO L225 Difference]: With dead ends: 274197 [2021-12-06 19:34:42,702 INFO L226 Difference]: Without dead ends: 138854 [2021-12-06 19:34:42,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:34:42,753 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 400 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:34:42,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 114 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 19:34:42,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138854 states. [2021-12-06 19:34:44,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138854 to 132686. [2021-12-06 19:34:44,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132686 states, 132685 states have (on average 1.0565549986810867) internal successors, (140189), 132685 states have internal predecessors, (140189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:44,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132686 states to 132686 states and 140189 transitions. [2021-12-06 19:34:44,257 INFO L78 Accepts]: Start accepts. Automaton has 132686 states and 140189 transitions. Word has length 507 [2021-12-06 19:34:44,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:34:44,257 INFO L470 AbstractCegarLoop]: Abstraction has 132686 states and 140189 transitions. [2021-12-06 19:34:44,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:44,257 INFO L276 IsEmpty]: Start isEmpty. Operand 132686 states and 140189 transitions. [2021-12-06 19:34:44,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2021-12-06 19:34:44,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:34:44,280 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:34:44,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 19:34:44,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 19:34:44,481 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:34:44,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:34:44,483 INFO L85 PathProgramCache]: Analyzing trace with hash -660462832, now seen corresponding path program 1 times [2021-12-06 19:34:44,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:34:44,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912661005] [2021-12-06 19:34:44,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:44,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:34:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:44,683 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 634 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-06 19:34:44,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:34:44,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912661005] [2021-12-06 19:34:44,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912661005] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:34:44,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:34:44,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:34:44,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931232203] [2021-12-06 19:34:44,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:34:44,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:34:44,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:34:44,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:34:44,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:34:44,685 INFO L87 Difference]: Start difference. First operand 132686 states and 140189 transitions. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:45,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:34:45,793 INFO L93 Difference]: Finished difference Result 288427 states and 304725 transitions. [2021-12-06 19:34:45,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:34:45,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 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 514 [2021-12-06 19:34:45,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:34:45,950 INFO L225 Difference]: With dead ends: 288427 [2021-12-06 19:34:45,950 INFO L226 Difference]: Without dead ends: 157166 [2021-12-06 19:34:45,983 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:34:45,984 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 148 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:34:45,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 326 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:34:46,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157166 states. [2021-12-06 19:34:47,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157166 to 152083. [2021-12-06 19:34:47,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152083 states, 152082 states have (on average 1.0570613221814547) internal successors, (160760), 152082 states have internal predecessors, (160760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:47,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152083 states to 152083 states and 160760 transitions. [2021-12-06 19:34:47,924 INFO L78 Accepts]: Start accepts. Automaton has 152083 states and 160760 transitions. Word has length 514 [2021-12-06 19:34:47,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:34:47,924 INFO L470 AbstractCegarLoop]: Abstraction has 152083 states and 160760 transitions. [2021-12-06 19:34:47,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:47,925 INFO L276 IsEmpty]: Start isEmpty. Operand 152083 states and 160760 transitions. [2021-12-06 19:34:47,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2021-12-06 19:34:47,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:34:47,950 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:34:47,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 19:34:47,950 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:34:47,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:34:47,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1991925347, now seen corresponding path program 1 times [2021-12-06 19:34:47,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:34:47,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302161040] [2021-12-06 19:34:47,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:47,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:34:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:48,204 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 470 proven. 143 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-06 19:34:48,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:34:48,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302161040] [2021-12-06 19:34:48,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302161040] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:34:48,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035545565] [2021-12-06 19:34:48,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:48,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:34:48,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:34:48,205 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:34:48,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 19:34:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:48,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:34:48,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:34:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 517 proven. 0 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-12-06 19:34:48,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:34:48,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035545565] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:34:48,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:34:48,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-06 19:34:48,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596246011] [2021-12-06 19:34:48,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:34:48,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:34:48,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:34:48,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:34:48,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:34:48,843 INFO L87 Difference]: Start difference. First operand 152083 states and 160760 transitions. Second operand has 4 states, 4 states have (on average 82.5) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:50,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:34:50,189 INFO L93 Difference]: Finished difference Result 389138 states and 410958 transitions. [2021-12-06 19:34:50,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:34:50,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 82.5) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 535 [2021-12-06 19:34:50,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:34:50,434 INFO L225 Difference]: With dead ends: 389138 [2021-12-06 19:34:50,434 INFO L226 Difference]: Without dead ends: 238480 [2021-12-06 19:34:50,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 533 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:34:50,504 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 505 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:34:50,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 297 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 19:34:50,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238480 states. [2021-12-06 19:34:52,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238480 to 224047. [2021-12-06 19:34:53,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224047 states, 224046 states have (on average 1.0566401542540371) internal successors, (236736), 224046 states have internal predecessors, (236736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:53,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224047 states to 224047 states and 236736 transitions. [2021-12-06 19:34:53,462 INFO L78 Accepts]: Start accepts. Automaton has 224047 states and 236736 transitions. Word has length 535 [2021-12-06 19:34:53,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:34:53,463 INFO L470 AbstractCegarLoop]: Abstraction has 224047 states and 236736 transitions. [2021-12-06 19:34:53,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.5) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:34:53,463 INFO L276 IsEmpty]: Start isEmpty. Operand 224047 states and 236736 transitions. [2021-12-06 19:34:53,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2021-12-06 19:34:53,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:34:53,495 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 19:34:53,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 19:34:53,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:34:53,697 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:34:53,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:34:53,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1767603145, now seen corresponding path program 1 times [2021-12-06 19:34:53,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:34:53,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525213842] [2021-12-06 19:34:53,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:53,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:34:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:53,959 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 677 proven. 147 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-12-06 19:34:53,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:34:53,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525213842] [2021-12-06 19:34:53,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525213842] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:34:53,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985918880] [2021-12-06 19:34:53,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:53,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:34:53,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:34:53,960 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:34:53,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 19:34:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:54,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:34:54,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:34:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 725 proven. 119 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-06 19:34:55,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:34:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 477 proven. 367 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-06 19:34:56,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985918880] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:34:56,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:34:56,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-06 19:34:56,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417362425] [2021-12-06 19:34:56,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:34:56,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 19:34:56,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:34:56,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 19:34:56,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:34:56,893 INFO L87 Difference]: Start difference. First operand 224047 states and 236736 transitions. Second operand has 10 states, 10 states have (on average 98.5) internal successors, (985), 9 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:35:06,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:35:06,411 INFO L93 Difference]: Finished difference Result 846414 states and 892759 transitions. [2021-12-06 19:35:06,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 19:35:06,412 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 98.5) internal successors, (985), 9 states have internal predecessors, (985), 0 states have call successors, (0), 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 605 [2021-12-06 19:35:06,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:35:07,246 INFO L225 Difference]: With dead ends: 846414 [2021-12-06 19:35:07,246 INFO L226 Difference]: Without dead ends: 609368 [2021-12-06 19:35:07,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1246 GetRequests, 1204 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=473, Invalid=1419, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 19:35:07,357 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 3723 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 12681 mSolverCounterSat, 1092 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3723 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 13773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1092 IncrementalHoareTripleChecker+Valid, 12681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:35:07,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3723 Valid, 1246 Invalid, 13773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1092 Valid, 12681 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2021-12-06 19:35:07,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609368 states. [2021-12-06 19:35:12,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609368 to 395325. [2021-12-06 19:35:12,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395325 states, 395324 states have (on average 1.0530198014792929) internal successors, (416284), 395324 states have internal predecessors, (416284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:35:13,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395325 states to 395325 states and 416284 transitions. [2021-12-06 19:35:13,398 INFO L78 Accepts]: Start accepts. Automaton has 395325 states and 416284 transitions. Word has length 605 [2021-12-06 19:35:13,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:35:13,399 INFO L470 AbstractCegarLoop]: Abstraction has 395325 states and 416284 transitions. [2021-12-06 19:35:13,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 98.5) internal successors, (985), 9 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:35:13,399 INFO L276 IsEmpty]: Start isEmpty. Operand 395325 states and 416284 transitions. [2021-12-06 19:35:13,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2021-12-06 19:35:13,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:35:13,501 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:35:13,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 19:35:13,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:35:13,703 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:35:13,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:35:13,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1305350802, now seen corresponding path program 1 times [2021-12-06 19:35:13,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:35:13,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127827160] [2021-12-06 19:35:13,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:13,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:35:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 472 proven. 0 refuted. 0 times theorem prover too weak. 704 trivial. 0 not checked. [2021-12-06 19:35:13,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:35:13,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127827160] [2021-12-06 19:35:13,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127827160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:35:13,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:35:13,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:35:13,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891112955] [2021-12-06 19:35:13,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:35:13,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:35:13,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:35:13,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:35:13,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:35:13,915 INFO L87 Difference]: Start difference. First operand 395325 states and 416284 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 2 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:35:16,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:35:16,323 INFO L93 Difference]: Finished difference Result 789020 states and 830894 transitions. [2021-12-06 19:35:16,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:35:16,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 2 states have internal predecessors, (330), 0 states have call successors, (0), 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 664 [2021-12-06 19:35:16,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:35:16,825 INFO L225 Difference]: With dead ends: 789020 [2021-12-06 19:35:16,826 INFO L226 Difference]: Without dead ends: 395325 [2021-12-06 19:35:16,973 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:35:16,973 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 69 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:35:16,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 124 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:35:17,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395325 states. [2021-12-06 19:35:21,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395325 to 395325. [2021-12-06 19:35:21,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395325 states, 395324 states have (on average 1.0530122127672492) internal successors, (416281), 395324 states have internal predecessors, (416281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:35:21,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395325 states to 395325 states and 416281 transitions. [2021-12-06 19:35:21,778 INFO L78 Accepts]: Start accepts. Automaton has 395325 states and 416281 transitions. Word has length 664 [2021-12-06 19:35:21,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:35:21,779 INFO L470 AbstractCegarLoop]: Abstraction has 395325 states and 416281 transitions. [2021-12-06 19:35:21,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 2 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:35:21,779 INFO L276 IsEmpty]: Start isEmpty. Operand 395325 states and 416281 transitions. [2021-12-06 19:35:22,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 673 [2021-12-06 19:35:22,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:35:22,090 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-06 19:35:22,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-06 19:35:22,090 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:35:22,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:35:22,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1100848076, now seen corresponding path program 1 times [2021-12-06 19:35:22,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:35:22,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523548499] [2021-12-06 19:35:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:22,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:35:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 855 proven. 0 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-12-06 19:35:22,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:35:22,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523548499] [2021-12-06 19:35:22,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523548499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:35:22,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:35:22,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:35:22,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858555467] [2021-12-06 19:35:22,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:35:22,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:35:22,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:35:22,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:35:22,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:35:22,280 INFO L87 Difference]: Start difference. First operand 395325 states and 416281 transitions. Second operand has 4 states, 4 states have (on average 110.5) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:35:24,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:35:24,779 INFO L93 Difference]: Finished difference Result 797262 states and 839901 transitions. [2021-12-06 19:35:24,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:35:24,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 110.5) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 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 672 [2021-12-06 19:35:24,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:35:25,215 INFO L225 Difference]: With dead ends: 797262 [2021-12-06 19:35:25,215 INFO L226 Difference]: Without dead ends: 383064 [2021-12-06 19:35:25,520 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:35:25,521 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 228 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:35:25,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 40 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:35:25,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383064 states. [2021-12-06 19:35:29,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383064 to 288616. [2021-12-06 19:35:29,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288616 states, 288615 states have (on average 1.048996067425463) internal successors, (302756), 288615 states have internal predecessors, (302756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:35:29,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288616 states to 288616 states and 302756 transitions. [2021-12-06 19:35:29,540 INFO L78 Accepts]: Start accepts. Automaton has 288616 states and 302756 transitions. Word has length 672 [2021-12-06 19:35:29,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:35:29,541 INFO L470 AbstractCegarLoop]: Abstraction has 288616 states and 302756 transitions. [2021-12-06 19:35:29,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.5) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:35:29,541 INFO L276 IsEmpty]: Start isEmpty. Operand 288616 states and 302756 transitions. [2021-12-06 19:35:29,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 690 [2021-12-06 19:35:29,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:35:29,606 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-12-06 19:35:29,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-06 19:35:29,606 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:35:29,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:35:29,607 INFO L85 PathProgramCache]: Analyzing trace with hash -2024701702, now seen corresponding path program 1 times [2021-12-06 19:35:29,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:35:29,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306905275] [2021-12-06 19:35:29,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:29,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:35:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 875 proven. 12 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2021-12-06 19:35:29,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:35:29,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306905275] [2021-12-06 19:35:29,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306905275] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:35:29,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393033944] [2021-12-06 19:35:29,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:29,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:35:29,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:35:29,827 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:35:29,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 19:35:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:30,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 1100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:35:30,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:35:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 751 proven. 0 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-12-06 19:35:30,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:35:30,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393033944] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:35:30,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:35:30,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-12-06 19:35:30,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668785910] [2021-12-06 19:35:30,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:35:30,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:35:30,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:35:30,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:35:30,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:35:30,683 INFO L87 Difference]: Start difference. First operand 288616 states and 302756 transitions. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 2 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:35:32,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:35:32,768 INFO L93 Difference]: Finished difference Result 817977 states and 858340 transitions. [2021-12-06 19:35:32,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:35:32,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 2 states have internal predecessors, (336), 0 states have call successors, (0), 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 689 [2021-12-06 19:35:32,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:35:33,325 INFO L225 Difference]: With dead ends: 817977 [2021-12-06 19:35:33,325 INFO L226 Difference]: Without dead ends: 531399 [2021-12-06 19:35:33,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 688 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:35:33,418 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 163 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:35:33,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 617 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:35:33,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531399 states. [2021-12-06 19:35:39,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531399 to 526261. [2021-12-06 19:35:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526261 states, 526260 states have (on average 1.0496066583057804) internal successors, (552366), 526260 states have internal predecessors, (552366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:35:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526261 states to 526261 states and 552366 transitions. [2021-12-06 19:35:40,249 INFO L78 Accepts]: Start accepts. Automaton has 526261 states and 552366 transitions. Word has length 689 [2021-12-06 19:35:40,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:35:40,250 INFO L470 AbstractCegarLoop]: Abstraction has 526261 states and 552366 transitions. [2021-12-06 19:35:40,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 2 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:35:40,250 INFO L276 IsEmpty]: Start isEmpty. Operand 526261 states and 552366 transitions. [2021-12-06 19:35:40,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2021-12-06 19:35:40,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:35:40,379 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-06 19:35:40,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 19:35:40,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-06 19:35:40,581 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:35:40,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:35:40,583 INFO L85 PathProgramCache]: Analyzing trace with hash 998378997, now seen corresponding path program 1 times [2021-12-06 19:35:40,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:35:40,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644459478] [2021-12-06 19:35:40,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:40,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:35:40,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2056 backedges. 1334 proven. 18 refuted. 0 times theorem prover too weak. 704 trivial. 0 not checked. [2021-12-06 19:35:40,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:35:40,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644459478] [2021-12-06 19:35:40,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644459478] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:35:40,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797821495] [2021-12-06 19:35:40,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:40,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:35:40,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:35:40,904 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:35:40,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 19:35:41,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:41,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:35:41,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:35:41,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2056 backedges. 1476 proven. 0 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2021-12-06 19:35:41,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:35:41,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797821495] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:35:41,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:35:41,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-06 19:35:41,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877520460] [2021-12-06 19:35:41,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:35:41,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:35:41,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:35:41,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:35:41,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:35:41,705 INFO L87 Difference]: Start difference. First operand 526261 states and 552366 transitions. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:35:44,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:35:44,893 INFO L93 Difference]: Finished difference Result 1141792 states and 1198223 transitions. [2021-12-06 19:35:44,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:35:44,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 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 831 [2021-12-06 19:35:44,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:35:45,564 INFO L225 Difference]: With dead ends: 1141792 [2021-12-06 19:35:45,564 INFO L226 Difference]: Without dead ends: 608842 [2021-12-06 19:35:45,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 835 GetRequests, 830 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:35:45,891 INFO L933 BasicCegarLoop]: 494 mSDtfsCounter, 154 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:35:45,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 688 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:35:46,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608842 states. [2021-12-06 19:35:52,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608842 to 596248. [2021-12-06 19:35:52,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596248 states, 596247 states have (on average 1.0466870273561124) internal successors, (624084), 596247 states have internal predecessors, (624084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:35:53,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596248 states to 596248 states and 624084 transitions. [2021-12-06 19:35:53,638 INFO L78 Accepts]: Start accepts. Automaton has 596248 states and 624084 transitions. Word has length 831 [2021-12-06 19:35:53,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:35:53,638 INFO L470 AbstractCegarLoop]: Abstraction has 596248 states and 624084 transitions. [2021-12-06 19:35:53,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:35:53,639 INFO L276 IsEmpty]: Start isEmpty. Operand 596248 states and 624084 transitions. [2021-12-06 19:35:53,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 879 [2021-12-06 19:35:53,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:35:53,824 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-12-06 19:35:53,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 19:35:54,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:35:54,025 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:35:54,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:35:54,025 INFO L85 PathProgramCache]: Analyzing trace with hash -575972292, now seen corresponding path program 1 times [2021-12-06 19:35:54,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:35:54,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742500208] [2021-12-06 19:35:54,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:54,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:35:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2745 backedges. 1310 proven. 18 refuted. 0 times theorem prover too weak. 1417 trivial. 0 not checked. [2021-12-06 19:35:54,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:35:54,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742500208] [2021-12-06 19:35:54,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742500208] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:35:54,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691724666] [2021-12-06 19:35:54,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:35:54,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:35:54,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:35:54,316 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:35:54,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3481c6c9-3f9d-4c67-a42e-b205995d2900/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 19:35:54,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:35:54,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 1457 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:35:54,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:35:55,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2745 backedges. 1207 proven. 0 refuted. 0 times theorem prover too weak. 1538 trivial. 0 not checked. [2021-12-06 19:35:55,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:35:55,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691724666] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:35:55,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:35:55,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-06 19:35:55,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618692470] [2021-12-06 19:35:55,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:35:55,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:35:55,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:35:55,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:35:55,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:35:55,538 INFO L87 Difference]: Start difference. First operand 596248 states and 624084 transitions. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 2 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)