./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label02.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_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/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_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/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_9f7f0cd3-129d-41a5-a570-a74c343bf08a/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 fede3a1c55393acd487bbed2de4254313cf50e8da830e08a05b90151eebe83c7 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:26:24,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:26:24,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:26:24,407 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:26:24,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:26:24,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:26:24,409 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:26:24,411 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:26:24,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:26:24,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:26:24,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:26:24,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:26:24,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:26:24,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:26:24,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:26:24,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:26:24,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:26:24,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:26:24,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:26:24,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:26:24,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:26:24,425 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:26:24,426 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:26:24,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:26:24,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:26:24,430 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:26:24,430 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:26:24,431 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:26:24,432 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:26:24,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:26:24,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:26:24,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:26:24,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:26:24,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:26:24,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:26:24,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:26:24,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:26:24,436 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:26:24,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:26:24,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:26:24,438 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:26:24,438 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:26:24,455 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:26:24,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:26:24,455 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:26:24,456 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:26:24,456 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:26:24,456 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:26:24,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:26:24,457 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:26:24,457 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:26:24,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:26:24,457 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:26:24,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:26:24,457 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:26:24,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:26:24,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:26:24,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:26:24,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:26:24,458 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:26:24,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:26:24,458 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:26:24,458 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:26:24,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:26:24,459 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:26:24,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:26:24,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:26:24,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:26:24,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:26:24,459 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:26:24,459 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:26:24,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:26:24,460 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:26:24,460 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:26:24,460 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:26:24,460 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:26:24,460 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_9f7f0cd3-129d-41a5-a570-a74c343bf08a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fede3a1c55393acd487bbed2de4254313cf50e8da830e08a05b90151eebe83c7 [2021-12-06 17:26:24,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:26:24,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:26:24,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:26:24,664 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:26:24,664 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:26:24,665 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem19_label02.c [2021-12-06 17:26:24,706 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/data/f3033a020/35c87bd954184ca3be807ee942eaca53/FLAGfb9e9455c [2021-12-06 17:26:25,372 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:26:25,373 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/sv-benchmarks/c/eca-rers2012/Problem19_label02.c [2021-12-06 17:26:25,405 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/data/f3033a020/35c87bd954184ca3be807ee942eaca53/FLAGfb9e9455c [2021-12-06 17:26:25,688 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/data/f3033a020/35c87bd954184ca3be807ee942eaca53 [2021-12-06 17:26:25,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:26:25,691 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:26:25,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:26:25,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:26:25,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:26:25,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:26:25" (1/1) ... [2021-12-06 17:26:25,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6984e8da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:25, skipping insertion in model container [2021-12-06 17:26:25,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:26:25" (1/1) ... [2021-12-06 17:26:25,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:26:25,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:26:26,088 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_9f7f0cd3-129d-41a5-a570-a74c343bf08a/sv-benchmarks/c/eca-rers2012/Problem19_label02.c[8512,8525] [2021-12-06 17:26:27,058 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:26:27,064 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:26:27,085 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_9f7f0cd3-129d-41a5-a570-a74c343bf08a/sv-benchmarks/c/eca-rers2012/Problem19_label02.c[8512,8525] [2021-12-06 17:26:27,769 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:26:27,799 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:26:27,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:27 WrapperNode [2021-12-06 17:26:27,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:26:27,800 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:26:27,800 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:26:27,800 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:26:27,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:27" (1/1) ... [2021-12-06 17:26:27,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:27" (1/1) ... [2021-12-06 17:26:28,364 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2021-12-06 17:26:28,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:26:28,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:26:28,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:26:28,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:26:28,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:27" (1/1) ... [2021-12-06 17:26:28,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:27" (1/1) ... [2021-12-06 17:26:28,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:27" (1/1) ... [2021-12-06 17:26:28,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:27" (1/1) ... [2021-12-06 17:26:28,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:27" (1/1) ... [2021-12-06 17:26:28,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:27" (1/1) ... [2021-12-06 17:26:28,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:27" (1/1) ... [2021-12-06 17:26:28,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:26:28,827 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:26:28,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:26:28,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:26:28,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:27" (1/1) ... [2021-12-06 17:26:28,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:26:28,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:26:28,854 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:26:28,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:26:28,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:26:28,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:26:28,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:26:28,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:26:28,984 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:26:28,985 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:26:34,412 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:26:34,445 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:26:34,445 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 17:26:34,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:26:34 BoogieIcfgContainer [2021-12-06 17:26:34,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:26:34,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:26:34,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:26:34,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:26:34,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:26:25" (1/3) ... [2021-12-06 17:26:34,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb7e0b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:26:34, skipping insertion in model container [2021-12-06 17:26:34,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:27" (2/3) ... [2021-12-06 17:26:34,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb7e0b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:26:34, skipping insertion in model container [2021-12-06 17:26:34,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:26:34" (3/3) ... [2021-12-06 17:26:34,458 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label02.c [2021-12-06 17:26:34,463 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:26:34,463 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:26:34,513 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:26:34,519 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 17:26:34,519 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:26:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:26:34,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 17:26:34,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:34,576 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] [2021-12-06 17:26:34,576 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:26:34,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:34,580 INFO L85 PathProgramCache]: Analyzing trace with hash -215114758, now seen corresponding path program 1 times [2021-12-06 17:26:34,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:26:34,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820784333] [2021-12-06 17:26:34,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:34,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:26:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:34,851 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 17:26:34,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:26:34,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820784333] [2021-12-06 17:26:34,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820784333] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:34,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:34,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:26:34,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040573009] [2021-12-06 17:26:34,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:34,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:26:34,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:26:34,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:26:34,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:26:34,881 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 17:26:45,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:45,830 INFO L93 Difference]: Finished difference Result 6284 states and 12039 transitions. [2021-12-06 17:26:45,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:26:45,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-06 17:26:45,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:45,864 INFO L225 Difference]: With dead ends: 6284 [2021-12-06 17:26:45,865 INFO L226 Difference]: Without dead ends: 4467 [2021-12-06 17:26:45,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:26:45,874 INFO L933 BasicCegarLoop]: 1812 mSDtfsCounter, 4207 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 10828 mSolverCounterSat, 2357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4207 SdHoareTripleChecker+Valid, 2090 SdHoareTripleChecker+Invalid, 13185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2357 IncrementalHoareTripleChecker+Valid, 10828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:45,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4207 Valid, 2090 Invalid, 13185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2357 Valid, 10828 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2021-12-06 17:26:45,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4467 states. [2021-12-06 17:26:45,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4467 to 4465. [2021-12-06 17:26:46,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4465 states, 4464 states have (on average 1.564516129032258) internal successors, (6984), 4464 states have internal predecessors, (6984), 0 states have call successors, (0), 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 17:26:46,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4465 states to 4465 states and 6984 transitions. [2021-12-06 17:26:46,021 INFO L78 Accepts]: Start accepts. Automaton has 4465 states and 6984 transitions. Word has length 66 [2021-12-06 17:26:46,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:46,021 INFO L470 AbstractCegarLoop]: Abstraction has 4465 states and 6984 transitions. [2021-12-06 17:26:46,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 17:26:46,022 INFO L276 IsEmpty]: Start isEmpty. Operand 4465 states and 6984 transitions. [2021-12-06 17:26:46,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-12-06 17:26:46,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:46,030 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:26:46,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:26:46,031 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:26:46,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:46,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1083783417, now seen corresponding path program 1 times [2021-12-06 17:26:46,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:26:46,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560746335] [2021-12-06 17:26:46,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:46,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:26:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:46,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:26:46,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560746335] [2021-12-06 17:26:46,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560746335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:46,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:46,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:26:46,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061866432] [2021-12-06 17:26:46,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:46,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:26:46,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:26:46,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:26:46,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:26:46,283 INFO L87 Difference]: Start difference. First operand 4465 states and 6984 transitions. Second operand has 4 states, 4 states have (on average 68.25) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 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 17:26:55,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:55,312 INFO L93 Difference]: Finished difference Result 11708 states and 20176 transitions. [2021-12-06 17:26:55,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:26:55,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 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 273 [2021-12-06 17:26:55,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:55,354 INFO L225 Difference]: With dead ends: 11708 [2021-12-06 17:26:55,354 INFO L226 Difference]: Without dead ends: 8610 [2021-12-06 17:26:55,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:26:55,359 INFO L933 BasicCegarLoop]: 1804 mSDtfsCounter, 3757 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 9457 mSolverCounterSat, 1337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3757 SdHoareTripleChecker+Valid, 2159 SdHoareTripleChecker+Invalid, 10794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1337 IncrementalHoareTripleChecker+Valid, 9457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:55,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3757 Valid, 2159 Invalid, 10794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1337 Valid, 9457 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2021-12-06 17:26:55,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8610 states. [2021-12-06 17:26:55,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8610 to 8594. [2021-12-06 17:26:55,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8594 states, 8593 states have (on average 1.3481903875247294) internal successors, (11585), 8593 states have internal predecessors, (11585), 0 states have call successors, (0), 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 17:26:55,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8594 states to 8594 states and 11585 transitions. [2021-12-06 17:26:55,513 INFO L78 Accepts]: Start accepts. Automaton has 8594 states and 11585 transitions. Word has length 273 [2021-12-06 17:26:55,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:55,514 INFO L470 AbstractCegarLoop]: Abstraction has 8594 states and 11585 transitions. [2021-12-06 17:26:55,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 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 17:26:55,514 INFO L276 IsEmpty]: Start isEmpty. Operand 8594 states and 11585 transitions. [2021-12-06 17:26:55,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-12-06 17:26:55,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:55,518 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:26:55,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:26:55,518 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:26:55,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:55,519 INFO L85 PathProgramCache]: Analyzing trace with hash -379973805, now seen corresponding path program 1 times [2021-12-06 17:26:55,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:26:55,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354591077] [2021-12-06 17:26:55,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:55,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:26:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:55,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:26:55,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354591077] [2021-12-06 17:26:55,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354591077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:55,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:55,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:26:55,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327736823] [2021-12-06 17:26:55,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:55,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:26:55,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:26:55,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:26:55,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:26:55,684 INFO L87 Difference]: Start difference. First operand 8594 states and 11585 transitions. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 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 17:27:00,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:00,964 INFO L93 Difference]: Finished difference Result 14487 states and 20451 transitions. [2021-12-06 17:27:00,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:27:00,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 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 301 [2021-12-06 17:27:00,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:00,994 INFO L225 Difference]: With dead ends: 14487 [2021-12-06 17:27:00,994 INFO L226 Difference]: Without dead ends: 8594 [2021-12-06 17:27:01,001 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 17:27:01,002 INFO L933 BasicCegarLoop]: 1775 mSDtfsCounter, 1153 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 5715 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 1954 SdHoareTripleChecker+Invalid, 5723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:01,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1153 Valid, 1954 Invalid, 5723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 5715 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-06 17:27:01,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8594 states. [2021-12-06 17:27:01,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8594 to 8594. [2021-12-06 17:27:01,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8594 states, 8593 states have (on average 1.3466775282206447) internal successors, (11572), 8593 states have internal predecessors, (11572), 0 states have call successors, (0), 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 17:27:01,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8594 states to 8594 states and 11572 transitions. [2021-12-06 17:27:01,131 INFO L78 Accepts]: Start accepts. Automaton has 8594 states and 11572 transitions. Word has length 301 [2021-12-06 17:27:01,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:01,131 INFO L470 AbstractCegarLoop]: Abstraction has 8594 states and 11572 transitions. [2021-12-06 17:27:01,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 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 17:27:01,132 INFO L276 IsEmpty]: Start isEmpty. Operand 8594 states and 11572 transitions. [2021-12-06 17:27:01,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2021-12-06 17:27:01,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:01,141 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:27:01,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:27:01,142 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:01,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:01,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1045523512, now seen corresponding path program 1 times [2021-12-06 17:27:01,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:01,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589698098] [2021-12-06 17:27:01,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:01,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-06 17:27:01,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:01,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589698098] [2021-12-06 17:27:01,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589698098] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:01,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:01,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:27:01,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823418391] [2021-12-06 17:27:01,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:01,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:27:01,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:01,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:27:01,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:01,374 INFO L87 Difference]: Start difference. First operand 8594 states and 11572 transitions. Second operand has 3 states, 3 states have (on average 185.0) internal successors, (555), 2 states have internal predecessors, (555), 0 states have call successors, (0), 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 17:27:06,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:06,679 INFO L93 Difference]: Finished difference Result 20123 states and 28984 transitions. [2021-12-06 17:27:06,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:27:06,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 2 states have internal predecessors, (555), 0 states have call successors, (0), 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 622 [2021-12-06 17:27:06,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:06,711 INFO L225 Difference]: With dead ends: 20123 [2021-12-06 17:27:06,711 INFO L226 Difference]: Without dead ends: 14261 [2021-12-06 17:27:06,717 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 17:27:06,717 INFO L933 BasicCegarLoop]: 1338 mSDtfsCounter, 1356 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 4196 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 1610 SdHoareTripleChecker+Invalid, 5626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 4196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:06,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1356 Valid, 1610 Invalid, 5626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1430 Valid, 4196 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-06 17:27:06,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14261 states. [2021-12-06 17:27:06,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14261 to 14244. [2021-12-06 17:27:06,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14244 states, 14243 states have (on average 1.2723443094853613) internal successors, (18122), 14243 states have internal predecessors, (18122), 0 states have call successors, (0), 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 17:27:06,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14244 states to 14244 states and 18122 transitions. [2021-12-06 17:27:06,866 INFO L78 Accepts]: Start accepts. Automaton has 14244 states and 18122 transitions. Word has length 622 [2021-12-06 17:27:06,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:06,867 INFO L470 AbstractCegarLoop]: Abstraction has 14244 states and 18122 transitions. [2021-12-06 17:27:06,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 2 states have internal predecessors, (555), 0 states have call successors, (0), 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 17:27:06,868 INFO L276 IsEmpty]: Start isEmpty. Operand 14244 states and 18122 transitions. [2021-12-06 17:27:06,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2021-12-06 17:27:06,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:06,880 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:27:06,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 17:27:06,881 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:06,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:06,881 INFO L85 PathProgramCache]: Analyzing trace with hash -2120431175, now seen corresponding path program 1 times [2021-12-06 17:27:06,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:06,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039037831] [2021-12-06 17:27:06,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:06,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-06 17:27:07,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:07,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039037831] [2021-12-06 17:27:07,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039037831] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:07,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:07,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:27:07,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346945627] [2021-12-06 17:27:07,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:07,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:27:07,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:07,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:27:07,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:07,082 INFO L87 Difference]: Start difference. First operand 14244 states and 18122 transitions. Second operand has 3 states, 3 states have (on average 185.0) internal successors, (555), 2 states have internal predecessors, (555), 0 states have call successors, (0), 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 17:27:11,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:11,960 INFO L93 Difference]: Finished difference Result 28511 states and 37633 transitions. [2021-12-06 17:27:11,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:27:11,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 2 states have internal predecessors, (555), 0 states have call successors, (0), 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 627 [2021-12-06 17:27:11,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:11,983 INFO L225 Difference]: With dead ends: 28511 [2021-12-06 17:27:11,983 INFO L226 Difference]: Without dead ends: 16999 [2021-12-06 17:27:11,992 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 17:27:11,993 INFO L933 BasicCegarLoop]: 706 mSDtfsCounter, 1387 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 3927 mSolverCounterSat, 2123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1387 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 6050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2123 IncrementalHoareTripleChecker+Valid, 3927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:11,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1387 Valid, 757 Invalid, 6050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2123 Valid, 3927 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-06 17:27:12,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16999 states. [2021-12-06 17:27:12,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16999 to 16985. [2021-12-06 17:27:12,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16985 states, 16984 states have (on average 1.270843146490815) internal successors, (21584), 16984 states have internal predecessors, (21584), 0 states have call successors, (0), 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 17:27:12,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16985 states to 16985 states and 21584 transitions. [2021-12-06 17:27:12,158 INFO L78 Accepts]: Start accepts. Automaton has 16985 states and 21584 transitions. Word has length 627 [2021-12-06 17:27:12,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:12,159 INFO L470 AbstractCegarLoop]: Abstraction has 16985 states and 21584 transitions. [2021-12-06 17:27:12,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 2 states have internal predecessors, (555), 0 states have call successors, (0), 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 17:27:12,160 INFO L276 IsEmpty]: Start isEmpty. Operand 16985 states and 21584 transitions. [2021-12-06 17:27:12,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 631 [2021-12-06 17:27:12,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:12,165 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:27:12,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 17:27:12,166 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:12,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:12,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1011897308, now seen corresponding path program 1 times [2021-12-06 17:27:12,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:12,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043934189] [2021-12-06 17:27:12,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:12,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-06 17:27:12,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:12,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043934189] [2021-12-06 17:27:12,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043934189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:12,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:12,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:27:12,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045618421] [2021-12-06 17:27:12,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:12,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:27:12,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:12,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:27:12,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:12,364 INFO L87 Difference]: Start difference. First operand 16985 states and 21584 transitions. Second operand has 3 states, 3 states have (on average 185.0) internal successors, (555), 2 states have internal predecessors, (555), 0 states have call successors, (0), 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 17:27:18,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:18,315 INFO L93 Difference]: Finished difference Result 43710 states and 57270 transitions. [2021-12-06 17:27:18,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:27:18,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 2 states have internal predecessors, (555), 0 states have call successors, (0), 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 630 [2021-12-06 17:27:18,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:18,358 INFO L225 Difference]: With dead ends: 43710 [2021-12-06 17:27:18,358 INFO L226 Difference]: Without dead ends: 29457 [2021-12-06 17:27:18,370 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 17:27:18,371 INFO L933 BasicCegarLoop]: 715 mSDtfsCounter, 2112 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 5114 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2112 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 5548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 5114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:18,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2112 Valid, 985 Invalid, 5548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 5114 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-06 17:27:18,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29457 states. [2021-12-06 17:27:18,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29457 to 29454. [2021-12-06 17:27:18,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29454 states, 29453 states have (on average 1.2556955148881268) internal successors, (36984), 29453 states have internal predecessors, (36984), 0 states have call successors, (0), 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 17:27:18,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29454 states to 29454 states and 36984 transitions. [2021-12-06 17:27:18,691 INFO L78 Accepts]: Start accepts. Automaton has 29454 states and 36984 transitions. Word has length 630 [2021-12-06 17:27:18,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:18,691 INFO L470 AbstractCegarLoop]: Abstraction has 29454 states and 36984 transitions. [2021-12-06 17:27:18,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 2 states have internal predecessors, (555), 0 states have call successors, (0), 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 17:27:18,692 INFO L276 IsEmpty]: Start isEmpty. Operand 29454 states and 36984 transitions. [2021-12-06 17:27:18,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 658 [2021-12-06 17:27:18,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:18,695 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:27:18,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 17:27:18,696 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:18,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:18,697 INFO L85 PathProgramCache]: Analyzing trace with hash -107422752, now seen corresponding path program 1 times [2021-12-06 17:27:18,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:18,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446802620] [2021-12-06 17:27:18,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:18,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:18,937 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:18,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:18,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446802620] [2021-12-06 17:27:18,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446802620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:18,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:18,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:27:18,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336216124] [2021-12-06 17:27:18,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:18,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:27:18,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:18,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:27:18,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:27:18,939 INFO L87 Difference]: Start difference. First operand 29454 states and 36984 transitions. Second operand has 5 states, 5 states have (on average 131.4) internal successors, (657), 4 states have internal predecessors, (657), 0 states have call successors, (0), 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 17:27:28,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:28,026 INFO L93 Difference]: Finished difference Result 63037 states and 78529 transitions. [2021-12-06 17:27:28,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:27:28,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 131.4) internal successors, (657), 4 states have internal predecessors, (657), 0 states have call successors, (0), 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 657 [2021-12-06 17:27:28,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:28,059 INFO L225 Difference]: With dead ends: 63037 [2021-12-06 17:27:28,059 INFO L226 Difference]: Without dead ends: 36289 [2021-12-06 17:27:28,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:27:28,078 INFO L933 BasicCegarLoop]: 1654 mSDtfsCounter, 2169 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 13132 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2169 SdHoareTripleChecker+Valid, 2184 SdHoareTripleChecker+Invalid, 13326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 13132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:28,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2169 Valid, 2184 Invalid, 13326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 13132 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2021-12-06 17:27:28,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36289 states. [2021-12-06 17:27:28,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36289 to 34921. [2021-12-06 17:27:28,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34921 states, 34920 states have (on average 1.2224513172966782) internal successors, (42688), 34920 states have internal predecessors, (42688), 0 states have call successors, (0), 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 17:27:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34921 states to 34921 states and 42688 transitions. [2021-12-06 17:27:28,396 INFO L78 Accepts]: Start accepts. Automaton has 34921 states and 42688 transitions. Word has length 657 [2021-12-06 17:27:28,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:28,397 INFO L470 AbstractCegarLoop]: Abstraction has 34921 states and 42688 transitions. [2021-12-06 17:27:28,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 131.4) internal successors, (657), 4 states have internal predecessors, (657), 0 states have call successors, (0), 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 17:27:28,397 INFO L276 IsEmpty]: Start isEmpty. Operand 34921 states and 42688 transitions. [2021-12-06 17:27:28,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 860 [2021-12-06 17:27:28,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:28,404 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:28,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 17:27:28,404 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:28,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:28,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1642656017, now seen corresponding path program 1 times [2021-12-06 17:27:28,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:28,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694843146] [2021-12-06 17:27:28,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:28,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:28,738 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 128 proven. 365 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-06 17:27:28,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:28,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694843146] [2021-12-06 17:27:28,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694843146] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:28,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812681031] [2021-12-06 17:27:28,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:28,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:28,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:27:28,740 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:27:28,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:27:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:28,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 17:27:28,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:29,526 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-12-06 17:27:29,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:27:29,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812681031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:29,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:27:29,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-06 17:27:29,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063526068] [2021-12-06 17:27:29,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:29,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:27:29,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:29,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:27:29,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:27:29,530 INFO L87 Difference]: Start difference. First operand 34921 states and 42688 transitions. Second operand has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 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 17:27:35,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:35,150 INFO L93 Difference]: Finished difference Result 94584 states and 117561 transitions. [2021-12-06 17:27:35,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:27:35,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 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 859 [2021-12-06 17:27:35,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:35,203 INFO L225 Difference]: With dead ends: 94584 [2021-12-06 17:27:35,203 INFO L226 Difference]: Without dead ends: 62395 [2021-12-06 17:27:35,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 863 GetRequests, 860 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:27:35,218 INFO L933 BasicCegarLoop]: 1127 mSDtfsCounter, 1556 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 4165 mSolverCounterSat, 1912 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1556 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 6077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1912 IncrementalHoareTripleChecker+Valid, 4165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:35,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1556 Valid, 1259 Invalid, 6077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1912 Valid, 4165 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-06 17:27:35,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62395 states. [2021-12-06 17:27:35,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62395 to 60903. [2021-12-06 17:27:35,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60903 states, 60902 states have (on average 1.2042297461495517) internal successors, (73340), 60902 states have internal predecessors, (73340), 0 states have call successors, (0), 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 17:27:35,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60903 states to 60903 states and 73340 transitions. [2021-12-06 17:27:35,760 INFO L78 Accepts]: Start accepts. Automaton has 60903 states and 73340 transitions. Word has length 859 [2021-12-06 17:27:35,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:35,761 INFO L470 AbstractCegarLoop]: Abstraction has 60903 states and 73340 transitions. [2021-12-06 17:27:35,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 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 17:27:35,761 INFO L276 IsEmpty]: Start isEmpty. Operand 60903 states and 73340 transitions. [2021-12-06 17:27:35,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 926 [2021-12-06 17:27:35,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:35,770 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:35,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:27:35,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 17:27:35,972 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:35,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:35,974 INFO L85 PathProgramCache]: Analyzing trace with hash -854206697, now seen corresponding path program 1 times [2021-12-06 17:27:35,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:35,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751049816] [2021-12-06 17:27:35,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:35,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 510 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-12-06 17:27:36,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:36,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751049816] [2021-12-06 17:27:36,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751049816] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:36,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:36,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:27:36,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232932995] [2021-12-06 17:27:36,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:36,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:27:36,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:36,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:27:36,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:36,370 INFO L87 Difference]: Start difference. First operand 60903 states and 73340 transitions. Second operand has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 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 17:27:42,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:42,541 INFO L93 Difference]: Finished difference Result 147865 states and 180254 transitions. [2021-12-06 17:27:42,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:27:42,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 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 925 [2021-12-06 17:27:42,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:42,622 INFO L225 Difference]: With dead ends: 147865 [2021-12-06 17:27:42,622 INFO L226 Difference]: Without dead ends: 89694 [2021-12-06 17:27:42,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:42,648 INFO L933 BasicCegarLoop]: 584 mSDtfsCounter, 1586 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 4237 mSolverCounterSat, 2344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1586 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 6581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2344 IncrementalHoareTripleChecker+Valid, 4237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:42,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1586 Valid, 643 Invalid, 6581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2344 Valid, 4237 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-06 17:27:42,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89694 states. [2021-12-06 17:27:43,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89694 to 82750. [2021-12-06 17:27:43,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82750 states, 82749 states have (on average 1.2328487353321491) internal successors, (102017), 82749 states have internal predecessors, (102017), 0 states have call successors, (0), 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 17:27:43,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82750 states to 82750 states and 102017 transitions. [2021-12-06 17:27:43,448 INFO L78 Accepts]: Start accepts. Automaton has 82750 states and 102017 transitions. Word has length 925 [2021-12-06 17:27:43,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:43,449 INFO L470 AbstractCegarLoop]: Abstraction has 82750 states and 102017 transitions. [2021-12-06 17:27:43,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 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 17:27:43,449 INFO L276 IsEmpty]: Start isEmpty. Operand 82750 states and 102017 transitions. [2021-12-06 17:27:43,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 948 [2021-12-06 17:27:43,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:43,457 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:27:43,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 17:27:43,457 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:43,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:43,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1899190886, now seen corresponding path program 1 times [2021-12-06 17:27:43,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:43,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229711301] [2021-12-06 17:27:43,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:43,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 638 proven. 0 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2021-12-06 17:27:43,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:43,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229711301] [2021-12-06 17:27:43,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229711301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:43,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:43,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:27:43,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034299428] [2021-12-06 17:27:43,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:43,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:27:43,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:43,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:27:43,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:27:43,772 INFO L87 Difference]: Start difference. First operand 82750 states and 102017 transitions. Second operand has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 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 17:27:54,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:54,159 INFO L93 Difference]: Finished difference Result 277643 states and 350702 transitions. [2021-12-06 17:27:54,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:27:54,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 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 947 [2021-12-06 17:27:54,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:54,376 INFO L225 Difference]: With dead ends: 277643 [2021-12-06 17:27:54,376 INFO L226 Difference]: Without dead ends: 197625 [2021-12-06 17:27:54,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:27:54,416 INFO L933 BasicCegarLoop]: 1220 mSDtfsCounter, 3335 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 8777 mSolverCounterSat, 2798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3335 SdHoareTripleChecker+Valid, 1494 SdHoareTripleChecker+Invalid, 11575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2798 IncrementalHoareTripleChecker+Valid, 8777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:54,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3335 Valid, 1494 Invalid, 11575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2798 Valid, 8777 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2021-12-06 17:27:54,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197625 states. [2021-12-06 17:27:56,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197625 to 194768. [2021-12-06 17:27:56,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194768 states, 194767 states have (on average 1.2057740787710445) internal successors, (234845), 194767 states have internal predecessors, (234845), 0 states have call successors, (0), 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 17:27:56,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194768 states to 194768 states and 234845 transitions. [2021-12-06 17:27:56,463 INFO L78 Accepts]: Start accepts. Automaton has 194768 states and 234845 transitions. Word has length 947 [2021-12-06 17:27:56,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:56,464 INFO L470 AbstractCegarLoop]: Abstraction has 194768 states and 234845 transitions. [2021-12-06 17:27:56,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 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 17:27:56,464 INFO L276 IsEmpty]: Start isEmpty. Operand 194768 states and 234845 transitions. [2021-12-06 17:27:56,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 957 [2021-12-06 17:27:56,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:56,476 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:27:56,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 17:27:56,476 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:56,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:56,476 INFO L85 PathProgramCache]: Analyzing trace with hash 73083807, now seen corresponding path program 1 times [2021-12-06 17:27:56,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:56,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883059528] [2021-12-06 17:27:56,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:56,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 542 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-12-06 17:27:56,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:56,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883059528] [2021-12-06 17:27:56,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883059528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:56,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:56,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:27:56,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839709439] [2021-12-06 17:27:56,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:56,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:27:56,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:56,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:27:56,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:56,835 INFO L87 Difference]: Start difference. First operand 194768 states and 234845 transitions. Second operand has 3 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 0 states have call successors, (0), 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 17:28:02,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:02,185 INFO L93 Difference]: Finished difference Result 392268 states and 472548 transitions. [2021-12-06 17:28:02,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:28:02,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 0 states have call successors, (0), 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 956 [2021-12-06 17:28:02,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:02,432 INFO L225 Difference]: With dead ends: 392268 [2021-12-06 17:28:02,432 INFO L226 Difference]: Without dead ends: 197502 [2021-12-06 17:28:02,511 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 17:28:02,512 INFO L933 BasicCegarLoop]: 2884 mSDtfsCounter, 1510 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 3675 mSolverCounterSat, 1477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1510 SdHoareTripleChecker+Valid, 3067 SdHoareTripleChecker+Invalid, 5152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1477 IncrementalHoareTripleChecker+Valid, 3675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:02,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1510 Valid, 3067 Invalid, 5152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1477 Valid, 3675 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-12-06 17:28:02,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197502 states. [2021-12-06 17:28:04,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197502 to 190666. [2021-12-06 17:28:04,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190666 states, 190665 states have (on average 1.1488999029711797) internal successors, (219055), 190665 states have internal predecessors, (219055), 0 states have call successors, (0), 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 17:28:04,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190666 states to 190666 states and 219055 transitions. [2021-12-06 17:28:04,409 INFO L78 Accepts]: Start accepts. Automaton has 190666 states and 219055 transitions. Word has length 956 [2021-12-06 17:28:04,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:04,410 INFO L470 AbstractCegarLoop]: Abstraction has 190666 states and 219055 transitions. [2021-12-06 17:28:04,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 0 states have call successors, (0), 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 17:28:04,410 INFO L276 IsEmpty]: Start isEmpty. Operand 190666 states and 219055 transitions. [2021-12-06 17:28:04,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1024 [2021-12-06 17:28:04,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:04,420 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, 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, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:28:04,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 17:28:04,420 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:28:04,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:04,420 INFO L85 PathProgramCache]: Analyzing trace with hash -423037369, now seen corresponding path program 1 times [2021-12-06 17:28:04,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:28:04,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31645665] [2021-12-06 17:28:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:04,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:28:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 671 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-12-06 17:28:04,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:28:04,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31645665] [2021-12-06 17:28:04,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31645665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:28:04,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:28:04,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:28:04,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836023511] [2021-12-06 17:28:04,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:28:04,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:28:04,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:28:04,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:28:04,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:28:04,869 INFO L87 Difference]: Start difference. First operand 190666 states and 219055 transitions. Second operand has 3 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 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 17:28:11,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:11,045 INFO L93 Difference]: Finished difference Result 423646 states and 491122 transitions. [2021-12-06 17:28:11,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:28:11,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 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 1023 [2021-12-06 17:28:11,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:11,368 INFO L225 Difference]: With dead ends: 423646 [2021-12-06 17:28:11,369 INFO L226 Difference]: Without dead ends: 241176 [2021-12-06 17:28:11,561 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 17:28:11,561 INFO L933 BasicCegarLoop]: 3006 mSDtfsCounter, 1353 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 4401 mSolverCounterSat, 763 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1353 SdHoareTripleChecker+Valid, 3192 SdHoareTripleChecker+Invalid, 5164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 763 IncrementalHoareTripleChecker+Valid, 4401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:11,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1353 Valid, 3192 Invalid, 5164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [763 Valid, 4401 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-06 17:28:11,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241176 states. [2021-12-06 17:28:13,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241176 to 228871. [2021-12-06 17:28:13,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228871 states, 228870 states have (on average 1.1324288897627475) internal successors, (259179), 228870 states have internal predecessors, (259179), 0 states have call successors, (0), 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 17:28:14,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228871 states to 228871 states and 259179 transitions. [2021-12-06 17:28:14,116 INFO L78 Accepts]: Start accepts. Automaton has 228871 states and 259179 transitions. Word has length 1023 [2021-12-06 17:28:14,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:14,116 INFO L470 AbstractCegarLoop]: Abstraction has 228871 states and 259179 transitions. [2021-12-06 17:28:14,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 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 17:28:14,117 INFO L276 IsEmpty]: Start isEmpty. Operand 228871 states and 259179 transitions. [2021-12-06 17:28:14,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1079 [2021-12-06 17:28:14,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:14,127 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:28:14,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 17:28:14,127 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:28:14,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:14,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1279323689, now seen corresponding path program 1 times [2021-12-06 17:28:14,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:28:14,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482778597] [2021-12-06 17:28:14,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:14,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:28:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:14,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 950 proven. 66 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2021-12-06 17:28:14,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:28:14,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482778597] [2021-12-06 17:28:14,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482778597] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:28:14,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519708695] [2021-12-06 17:28:14,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:14,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:28:14,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:28:14,461 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:28:14,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:28:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:14,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 17:28:14,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:28:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2021-12-06 17:28:15,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:28:15,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519708695] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:28:15,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:28:15,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-06 17:28:15,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687653386] [2021-12-06 17:28:15,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:28:15,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:28:15,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:28:15,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:28:15,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:28:15,349 INFO L87 Difference]: Start difference. First operand 228871 states and 259179 transitions. Second operand has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:21,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:21,803 INFO L93 Difference]: Finished difference Result 505657 states and 576429 transitions. [2021-12-06 17:28:21,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:28:21,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1078 [2021-12-06 17:28:21,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:22,158 INFO L225 Difference]: With dead ends: 505657 [2021-12-06 17:28:22,158 INFO L226 Difference]: Without dead ends: 294539 [2021-12-06 17:28:22,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1081 GetRequests, 1078 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:28:22,382 INFO L933 BasicCegarLoop]: 1107 mSDtfsCounter, 1611 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4286 mSolverCounterSat, 1800 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1611 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 6086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1800 IncrementalHoareTripleChecker+Valid, 4286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:22,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1611 Valid, 1194 Invalid, 6086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1800 Valid, 4286 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-06 17:28:22,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294539 states. [2021-12-06 17:28:25,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294539 to 280748. [2021-12-06 17:28:25,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280748 states, 280747 states have (on average 1.1397735327536893) internal successors, (319988), 280747 states have internal predecessors, (319988), 0 states have call successors, (0), 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 17:28:25,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280748 states to 280748 states and 319988 transitions. [2021-12-06 17:28:25,465 INFO L78 Accepts]: Start accepts. Automaton has 280748 states and 319988 transitions. Word has length 1078 [2021-12-06 17:28:25,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:25,465 INFO L470 AbstractCegarLoop]: Abstraction has 280748 states and 319988 transitions. [2021-12-06 17:28:25,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:25,466 INFO L276 IsEmpty]: Start isEmpty. Operand 280748 states and 319988 transitions. [2021-12-06 17:28:25,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1083 [2021-12-06 17:28:25,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:25,476 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:28:25,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:28:25,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 17:28:25,679 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:28:25,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:25,681 INFO L85 PathProgramCache]: Analyzing trace with hash -923699123, now seen corresponding path program 1 times [2021-12-06 17:28:25,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:28:25,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750921980] [2021-12-06 17:28:25,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:25,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:28:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 962 proven. 66 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2021-12-06 17:28:26,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:28:26,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750921980] [2021-12-06 17:28:26,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750921980] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:28:26,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258075664] [2021-12-06 17:28:26,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:26,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:28:26,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:28:26,182 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:28:26,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:28:26,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:26,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 1276 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 17:28:26,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:28:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 715 proven. 0 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-12-06 17:28:27,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:28:27,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258075664] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:28:27,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:28:27,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-06 17:28:27,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184490820] [2021-12-06 17:28:27,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:28:27,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:28:27,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:28:27,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:28:27,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:28:27,060 INFO L87 Difference]: Start difference. First operand 280748 states and 319988 transitions. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 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 17:28:34,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:34,542 INFO L93 Difference]: Finished difference Result 586185 states and 666304 transitions. [2021-12-06 17:28:34,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:28:34,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 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 1082 [2021-12-06 17:28:34,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:34,994 INFO L225 Difference]: With dead ends: 586185 [2021-12-06 17:28:34,994 INFO L226 Difference]: Without dead ends: 308169 [2021-12-06 17:28:35,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1085 GetRequests, 1082 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:28:35,078 INFO L933 BasicCegarLoop]: 2932 mSDtfsCounter, 1376 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 4867 mSolverCounterSat, 981 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1376 SdHoareTripleChecker+Valid, 3105 SdHoareTripleChecker+Invalid, 5848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 981 IncrementalHoareTripleChecker+Valid, 4867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:35,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1376 Valid, 3105 Invalid, 5848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [981 Valid, 4867 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2021-12-06 17:28:35,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308169 states. [2021-12-06 17:28:37,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308169 to 302594. [2021-12-06 17:28:37,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302594 states, 302593 states have (on average 1.1119325298338032) internal successors, (336463), 302593 states have internal predecessors, (336463), 0 states have call successors, (0), 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 17:28:38,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302594 states to 302594 states and 336463 transitions. [2021-12-06 17:28:38,152 INFO L78 Accepts]: Start accepts. Automaton has 302594 states and 336463 transitions. Word has length 1082 [2021-12-06 17:28:38,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:38,152 INFO L470 AbstractCegarLoop]: Abstraction has 302594 states and 336463 transitions. [2021-12-06 17:28:38,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 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 17:28:38,153 INFO L276 IsEmpty]: Start isEmpty. Operand 302594 states and 336463 transitions. [2021-12-06 17:28:38,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1131 [2021-12-06 17:28:38,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:38,165 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:28:38,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 17:28:38,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 17:28:38,367 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:28:38,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:38,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1138829221, now seen corresponding path program 1 times [2021-12-06 17:28:38,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:28:38,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022453037] [2021-12-06 17:28:38,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:38,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:28:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1763 backedges. 1055 proven. 485 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-12-06 17:28:39,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:28:39,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022453037] [2021-12-06 17:28:39,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022453037] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:28:39,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533554305] [2021-12-06 17:28:39,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:39,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:28:39,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:28:39,014 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:28:39,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:28:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:39,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 1352 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 17:28:39,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:28:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1763 backedges. 1238 proven. 0 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2021-12-06 17:28:39,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:28:39,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533554305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:28:39,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:28:39,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-06 17:28:39,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725811202] [2021-12-06 17:28:39,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:28:39,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:28:39,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:28:39,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:28:39,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:28:39,968 INFO L87 Difference]: Start difference. First operand 302594 states and 336463 transitions. Second operand has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 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 17:28:47,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:47,214 INFO L93 Difference]: Finished difference Result 651705 states and 726129 transitions. [2021-12-06 17:28:47,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:28:47,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 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 1130 [2021-12-06 17:28:47,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:47,594 INFO L225 Difference]: With dead ends: 651705 [2021-12-06 17:28:47,594 INFO L226 Difference]: Without dead ends: 349111 [2021-12-06 17:28:47,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1135 GetRequests, 1131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:28:47,802 INFO L933 BasicCegarLoop]: 1755 mSDtfsCounter, 1371 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 4958 mSolverCounterSat, 530 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1371 SdHoareTripleChecker+Valid, 1916 SdHoareTripleChecker+Invalid, 5488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 530 IncrementalHoareTripleChecker+Valid, 4958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:47,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1371 Valid, 1916 Invalid, 5488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [530 Valid, 4958 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-06 17:28:48,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349111 states. [2021-12-06 17:28:50,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349111 to 349010. [2021-12-06 17:28:50,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349010 states, 349009 states have (on average 1.1062923878753843) internal successors, (386106), 349009 states have internal predecessors, (386106), 0 states have call successors, (0), 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 17:28:51,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349010 states to 349010 states and 386106 transitions. [2021-12-06 17:28:51,380 INFO L78 Accepts]: Start accepts. Automaton has 349010 states and 386106 transitions. Word has length 1130 [2021-12-06 17:28:51,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:51,381 INFO L470 AbstractCegarLoop]: Abstraction has 349010 states and 386106 transitions. [2021-12-06 17:28:51,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 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 17:28:51,381 INFO L276 IsEmpty]: Start isEmpty. Operand 349010 states and 386106 transitions. [2021-12-06 17:28:51,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1261 [2021-12-06 17:28:51,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:51,398 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:28:51,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 17:28:51,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 17:28:51,600 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:28:51,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:51,603 INFO L85 PathProgramCache]: Analyzing trace with hash -406532952, now seen corresponding path program 1 times [2021-12-06 17:28:51,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:28:51,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547096045] [2021-12-06 17:28:51,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:51,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:28:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:51,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2085 backedges. 1431 proven. 0 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2021-12-06 17:28:51,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:28:51,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547096045] [2021-12-06 17:28:51,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547096045] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:28:51,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:28:51,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:28:51,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799730000] [2021-12-06 17:28:51,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:28:51,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:28:51,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:28:51,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:28:51,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:28:51,980 INFO L87 Difference]: Start difference. First operand 349010 states and 386106 transitions. Second operand has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 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 17:29:03,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:03,644 INFO L93 Difference]: Finished difference Result 984677 states and 1111034 transitions. [2021-12-06 17:29:03,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:29:03,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 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 1260 [2021-12-06 17:29:03,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:04,426 INFO L225 Difference]: With dead ends: 984677 [2021-12-06 17:29:04,426 INFO L226 Difference]: Without dead ends: 656150 [2021-12-06 17:29:04,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:29:04,554 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 3218 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 7787 mSolverCounterSat, 2641 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3218 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 10428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2641 IncrementalHoareTripleChecker+Valid, 7787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:29:04,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3218 Valid, 1111 Invalid, 10428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2641 Valid, 7787 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2021-12-06 17:29:05,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656150 states. [2021-12-06 17:29:10,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656150 to 641116. [2021-12-06 17:29:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641116 states, 641115 states have (on average 1.1013312744203458) internal successors, (706080), 641115 states have internal predecessors, (706080), 0 states have call successors, (0), 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 17:29:11,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641116 states to 641116 states and 706080 transitions. [2021-12-06 17:29:11,290 INFO L78 Accepts]: Start accepts. Automaton has 641116 states and 706080 transitions. Word has length 1260 [2021-12-06 17:29:11,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:11,291 INFO L470 AbstractCegarLoop]: Abstraction has 641116 states and 706080 transitions. [2021-12-06 17:29:11,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 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 17:29:11,291 INFO L276 IsEmpty]: Start isEmpty. Operand 641116 states and 706080 transitions. [2021-12-06 17:29:11,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1474 [2021-12-06 17:29:11,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:11,311 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 17:29:11,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 17:29:11,312 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:29:11,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:11,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1320715666, now seen corresponding path program 1 times [2021-12-06 17:29:11,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:29:11,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350930487] [2021-12-06 17:29:11,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:11,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:29:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 437 proven. 1209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:29:12,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:29:12,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350930487] [2021-12-06 17:29:12,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350930487] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:29:12,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946172985] [2021-12-06 17:29:12,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:12,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:29:12,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:29:12,157 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:29:12,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:29:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:12,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 1665 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 17:29:12,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:29:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 991 proven. 0 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2021-12-06 17:29:14,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:29:14,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946172985] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:29:14,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:29:14,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2021-12-06 17:29:14,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648653386] [2021-12-06 17:29:14,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:29:14,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:29:14,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:29:14,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:29:14,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:29:14,148 INFO L87 Difference]: Start difference. First operand 641116 states and 706080 transitions. Second operand has 3 states, 3 states have (on average 301.3333333333333) internal successors, (904), 3 states have internal predecessors, (904), 0 states have call successors, (0), 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 17:29:21,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:21,924 INFO L93 Difference]: Finished difference Result 1274082 states and 1404125 transitions. [2021-12-06 17:29:21,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:29:21,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 301.3333333333333) internal successors, (904), 3 states have internal predecessors, (904), 0 states have call successors, (0), 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 1473 [2021-12-06 17:29:21,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:22,767 INFO L225 Difference]: With dead ends: 1274082 [2021-12-06 17:29:22,767 INFO L226 Difference]: Without dead ends: 653449 [2021-12-06 17:29:22,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1484 GetRequests, 1476 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:29:22,931 INFO L933 BasicCegarLoop]: 3030 mSDtfsCounter, 1100 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 3818 mSolverCounterSat, 911 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 3194 SdHoareTripleChecker+Invalid, 4729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 911 IncrementalHoareTripleChecker+Valid, 3818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:29:22,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1100 Valid, 3194 Invalid, 4729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [911 Valid, 3818 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-06 17:29:23,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653449 states. [2021-12-06 17:29:28,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653449 to 647945. [2021-12-06 17:29:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647945 states, 647944 states have (on average 1.0987276678231452) internal successors, (711914), 647944 states have internal predecessors, (711914), 0 states have call successors, (0), 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 17:29:30,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647945 states to 647945 states and 711914 transitions. [2021-12-06 17:29:30,061 INFO L78 Accepts]: Start accepts. Automaton has 647945 states and 711914 transitions. Word has length 1473 [2021-12-06 17:29:30,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:30,062 INFO L470 AbstractCegarLoop]: Abstraction has 647945 states and 711914 transitions. [2021-12-06 17:29:30,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 301.3333333333333) internal successors, (904), 3 states have internal predecessors, (904), 0 states have call successors, (0), 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 17:29:30,062 INFO L276 IsEmpty]: Start isEmpty. Operand 647945 states and 711914 transitions. [2021-12-06 17:29:30,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1588 [2021-12-06 17:29:30,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:30,297 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:29:30,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 17:29:30,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:29:30,497 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:29:30,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:30,498 INFO L85 PathProgramCache]: Analyzing trace with hash -2096687814, now seen corresponding path program 1 times [2021-12-06 17:29:30,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:29:30,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221230662] [2021-12-06 17:29:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:30,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:29:30,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 778 proven. 485 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-06 17:29:31,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:29:31,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221230662] [2021-12-06 17:29:31,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221230662] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:29:31,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430672518] [2021-12-06 17:29:31,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:31,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:29:31,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:29:31,476 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:29:31,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 17:29:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:31,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 17:29:31,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:29:33,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 1135 trivial. 0 not checked. [2021-12-06 17:29:33,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:29:33,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430672518] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:29:33,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:29:33,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-06 17:29:33,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855818341] [2021-12-06 17:29:33,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:29:33,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:29:33,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:29:33,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:29:33,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:29:33,206 INFO L87 Difference]: Start difference. First operand 647945 states and 711914 transitions. Second operand has 3 states, 3 states have (on average 259.3333333333333) internal successors, (778), 3 states have internal predecessors, (778), 0 states have call successors, (0), 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 17:29:44,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:44,636 INFO L93 Difference]: Finished difference Result 1406436 states and 1558590 transitions. [2021-12-06 17:29:44,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:29:44,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 259.3333333333333) internal successors, (778), 3 states have internal predecessors, (778), 0 states have call successors, (0), 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 1587 [2021-12-06 17:29:44,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:45,598 INFO L225 Difference]: With dead ends: 1406436 [2021-12-06 17:29:45,598 INFO L226 Difference]: Without dead ends: 778974 [2021-12-06 17:29:45,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1592 GetRequests, 1586 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:29:45,782 INFO L933 BasicCegarLoop]: 2720 mSDtfsCounter, 1437 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 4764 mSolverCounterSat, 1008 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1437 SdHoareTripleChecker+Valid, 2947 SdHoareTripleChecker+Invalid, 5772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1008 IncrementalHoareTripleChecker+Valid, 4764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:29:45,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1437 Valid, 2947 Invalid, 5772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1008 Valid, 4764 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2021-12-06 17:29:46,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778974 states. [2021-12-06 17:29:52,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778974 to 761218. [2021-12-06 17:29:52,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761218 states, 761217 states have (on average 1.092449327852636) internal successors, (831591), 761217 states have internal predecessors, (831591), 0 states have call successors, (0), 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 17:29:54,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761218 states to 761218 states and 831591 transitions. [2021-12-06 17:29:54,006 INFO L78 Accepts]: Start accepts. Automaton has 761218 states and 831591 transitions. Word has length 1587 [2021-12-06 17:29:54,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:54,007 INFO L470 AbstractCegarLoop]: Abstraction has 761218 states and 831591 transitions. [2021-12-06 17:29:54,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.3333333333333) internal successors, (778), 3 states have internal predecessors, (778), 0 states have call successors, (0), 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 17:29:54,007 INFO L276 IsEmpty]: Start isEmpty. Operand 761218 states and 831591 transitions. [2021-12-06 17:29:54,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1612 [2021-12-06 17:29:54,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:54,028 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 17:29:54,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 17:29:54,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 17:29:54,230 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:29:54,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:54,232 INFO L85 PathProgramCache]: Analyzing trace with hash -818958838, now seen corresponding path program 1 times [2021-12-06 17:29:54,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:29:54,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149337085] [2021-12-06 17:29:54,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:54,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:29:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:54,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2124 backedges. 1036 proven. 0 refuted. 0 times theorem prover too weak. 1088 trivial. 0 not checked. [2021-12-06 17:29:54,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:29:54,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149337085] [2021-12-06 17:29:54,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149337085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:29:54,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:29:54,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:29:54,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320245673] [2021-12-06 17:29:54,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:29:54,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:29:54,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:29:54,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:29:54,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:29:54,778 INFO L87 Difference]: Start difference. First operand 761218 states and 831591 transitions. Second operand has 3 states, 3 states have (on average 276.6666666666667) internal successors, (830), 3 states have internal predecessors, (830), 0 states have call successors, (0), 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 17:30:04,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:30:04,826 INFO L93 Difference]: Finished difference Result 1515608 states and 1656272 transitions. [2021-12-06 17:30:04,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:30:04,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 276.6666666666667) internal successors, (830), 3 states have internal predecessors, (830), 0 states have call successors, (0), 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 1611 [2021-12-06 17:30:04,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:30:05,945 INFO L225 Difference]: With dead ends: 1515608 [2021-12-06 17:30:05,945 INFO L226 Difference]: Without dead ends: 757122 [2021-12-06 17:30:06,136 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 17:30:06,137 INFO L933 BasicCegarLoop]: 2846 mSDtfsCounter, 1184 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4404 mSolverCounterSat, 876 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 3038 SdHoareTripleChecker+Invalid, 5280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 876 IncrementalHoareTripleChecker+Valid, 4404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:30:06,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1184 Valid, 3038 Invalid, 5280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [876 Valid, 4404 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2021-12-06 17:30:06,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757122 states. [2021-12-06 17:30:12,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757122 to 755742. [2021-12-06 17:30:12,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755742 states, 755741 states have (on average 1.067086475393025) internal successors, (806441), 755741 states have internal predecessors, (806441), 0 states have call successors, (0), 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 17:30:13,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755742 states to 755742 states and 806441 transitions. [2021-12-06 17:30:13,809 INFO L78 Accepts]: Start accepts. Automaton has 755742 states and 806441 transitions. Word has length 1611 [2021-12-06 17:30:13,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:30:13,810 INFO L470 AbstractCegarLoop]: Abstraction has 755742 states and 806441 transitions. [2021-12-06 17:30:13,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.6666666666667) internal successors, (830), 3 states have internal predecessors, (830), 0 states have call successors, (0), 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 17:30:13,810 INFO L276 IsEmpty]: Start isEmpty. Operand 755742 states and 806441 transitions. [2021-12-06 17:30:13,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1749 [2021-12-06 17:30:13,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:30:13,858 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 17:30:13,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 17:30:13,858 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:30:13,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:30:13,859 INFO L85 PathProgramCache]: Analyzing trace with hash -2125656280, now seen corresponding path program 1 times [2021-12-06 17:30:13,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:30:13,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334980027] [2021-12-06 17:30:13,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:30:13,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:30:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:30:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2600 backedges. 1185 proven. 0 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2021-12-06 17:30:14,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:30:14,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334980027] [2021-12-06 17:30:14,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334980027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:30:14,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:30:14,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:30:14,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772553929] [2021-12-06 17:30:14,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:30:14,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:30:14,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:30:14,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:30:14,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:30:14,545 INFO L87 Difference]: Start difference. First operand 755742 states and 806441 transitions. Second operand has 3 states, 3 states have (on average 280.6666666666667) internal successors, (842), 3 states have internal predecessors, (842), 0 states have call successors, (0), 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 17:30:25,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:30:25,440 INFO L93 Difference]: Finished difference Result 1604447 states and 1714436 transitions. [2021-12-06 17:30:25,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:30:25,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 280.6666666666667) internal successors, (842), 3 states have internal predecessors, (842), 0 states have call successors, (0), 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 1748 [2021-12-06 17:30:25,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:30:26,571 INFO L225 Difference]: With dead ends: 1604447 [2021-12-06 17:30:26,571 INFO L226 Difference]: Without dead ends: 851437 [2021-12-06 17:30:26,969 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 17:30:26,970 INFO L933 BasicCegarLoop]: 3066 mSDtfsCounter, 1199 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 4992 mSolverCounterSat, 908 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 3279 SdHoareTripleChecker+Invalid, 5900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 908 IncrementalHoareTripleChecker+Valid, 4992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:30:26,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1199 Valid, 3279 Invalid, 5900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [908 Valid, 4992 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2021-12-06 17:30:27,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851437 states. [2021-12-06 17:30:34,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851437 to 844526. [2021-12-06 17:30:34,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844526 states, 844525 states have (on average 1.0612581036677422) internal successors, (896259), 844525 states have internal predecessors, (896259), 0 states have call successors, (0), 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 17:30:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844526 states to 844526 states and 896259 transitions. [2021-12-06 17:30:35,849 INFO L78 Accepts]: Start accepts. Automaton has 844526 states and 896259 transitions. Word has length 1748 [2021-12-06 17:30:35,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:30:35,850 INFO L470 AbstractCegarLoop]: Abstraction has 844526 states and 896259 transitions. [2021-12-06 17:30:35,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 280.6666666666667) internal successors, (842), 3 states have internal predecessors, (842), 0 states have call successors, (0), 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 17:30:35,850 INFO L276 IsEmpty]: Start isEmpty. Operand 844526 states and 896259 transitions. [2021-12-06 17:30:35,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1756 [2021-12-06 17:30:35,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:30:35,882 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 17:30:35,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 17:30:35,882 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:30:35,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:30:35,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1463861229, now seen corresponding path program 1 times [2021-12-06 17:30:35,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:30:35,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893943487] [2021-12-06 17:30:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:30:35,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:30:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:30:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 1367 proven. 485 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2021-12-06 17:30:36,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:30:36,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893943487] [2021-12-06 17:30:36,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893943487] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:30:36,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233524878] [2021-12-06 17:30:36,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:30:36,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:30:36,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:30:36,752 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:30:36,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f7f0cd3-129d-41a5-a570-a74c343bf08a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 17:30:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:30:37,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 1944 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 17:30:37,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:30:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 1852 proven. 0 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2021-12-06 17:30:39,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:30:39,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233524878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:30:39,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:30:39,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-06 17:30:39,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772954308] [2021-12-06 17:30:39,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:30:39,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:30:39,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:30:39,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:30:39,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:30:39,152 INFO L87 Difference]: Start difference. First operand 844526 states and 896259 transitions. Second operand has 4 states, 4 states have (on average 358.0) internal successors, (1432), 3 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)