./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem18_label35.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem18_label35.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY --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 8128539ddd0b5a88dd7320efc1908ba181b1e3f708bf4f1a85c5deb115c94919 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:12:43,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:12:43,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:12:43,731 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:12:43,732 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:12:43,737 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:12:43,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:12:43,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:12:43,747 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:12:43,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:12:43,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:12:43,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:12:43,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:12:43,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:12:43,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:12:43,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:12:43,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:12:43,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:12:43,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:12:43,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:12:43,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:12:43,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:12:43,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:12:43,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:12:43,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:12:43,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:12:43,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:12:43,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:12:43,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:12:43,806 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:12:43,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:12:43,808 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:12:43,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:12:43,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:12:43,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:12:43,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:12:43,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:12:43,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:12:43,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:12:43,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:12:43,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:12:43,818 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:12:43,874 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:12:43,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:12:43,875 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:12:43,875 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:12:43,876 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:12:43,877 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:12:43,877 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:12:43,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:12:43,877 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:12:43,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:12:43,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:12:43,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:12:43,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:12:43,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:12:43,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:12:43,880 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:12:43,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:12:43,881 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:12:43,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:12:43,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:12:43,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:12:43,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:12:43,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:12:43,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:12:43,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:12:43,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:12:43,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:12:43,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:12:43,884 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:12:43,886 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:12:43,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:12:43,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:12:43,887 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_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8128539ddd0b5a88dd7320efc1908ba181b1e3f708bf4f1a85c5deb115c94919 [2021-11-07 08:12:44,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:12:44,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:12:44,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:12:44,167 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:12:44,167 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:12:44,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/eca-rers2012/Problem18_label35.c [2021-11-07 08:12:44,254 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/data/e167fe8ce/8f5a6e9b23354afcb81d87d5639e33b4/FLAG9e718d5a5 [2021-11-07 08:12:44,997 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:12:44,998 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/sv-benchmarks/c/eca-rers2012/Problem18_label35.c [2021-11-07 08:12:45,037 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/data/e167fe8ce/8f5a6e9b23354afcb81d87d5639e33b4/FLAG9e718d5a5 [2021-11-07 08:12:45,092 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/data/e167fe8ce/8f5a6e9b23354afcb81d87d5639e33b4 [2021-11-07 08:12:45,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:12:45,097 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:12:45,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:12:45,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:12:45,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:12:45,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:12:45" (1/1) ... [2021-11-07 08:12:45,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3605ad6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:45, skipping insertion in model container [2021-11-07 08:12:45,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:12:45" (1/1) ... [2021-11-07 08:12:45,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:12:45,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:12:45,507 WARN L228 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_30183bab-a867-439d-a668-5075cb622d04/sv-benchmarks/c/eca-rers2012/Problem18_label35.c[1790,1803] [2021-11-07 08:12:46,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:12:46,377 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:12:46,401 WARN L228 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_30183bab-a867-439d-a668-5075cb622d04/sv-benchmarks/c/eca-rers2012/Problem18_label35.c[1790,1803] [2021-11-07 08:12:46,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:12:46,845 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:12:46,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:46 WrapperNode [2021-11-07 08:12:46,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:12:46,848 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:12:46,848 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:12:46,848 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:12:46,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:46" (1/1) ... [2021-11-07 08:12:46,915 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:46" (1/1) ... [2021-11-07 08:12:47,166 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:12:47,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:12:47,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:12:47,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:12:47,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:46" (1/1) ... [2021-11-07 08:12:47,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:46" (1/1) ... [2021-11-07 08:12:47,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:46" (1/1) ... [2021-11-07 08:12:47,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:46" (1/1) ... [2021-11-07 08:12:47,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:46" (1/1) ... [2021-11-07 08:12:47,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:46" (1/1) ... [2021-11-07 08:12:47,422 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:46" (1/1) ... [2021-11-07 08:12:47,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:12:47,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:12:47,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:12:47,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:12:47,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:46" (1/1) ... [2021-11-07 08:12:47,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:12:47,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:12:47,507 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:12:47,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:12:47,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:12:47,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:12:47,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:12:47,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:12:51,269 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:12:51,270 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-07 08:12:51,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:12:51 BoogieIcfgContainer [2021-11-07 08:12:51,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:12:51,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:12:51,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:12:51,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:12:51,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:12:45" (1/3) ... [2021-11-07 08:12:51,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33b116b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:12:51, skipping insertion in model container [2021-11-07 08:12:51,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:46" (2/3) ... [2021-11-07 08:12:51,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33b116b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:12:51, skipping insertion in model container [2021-11-07 08:12:51,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:12:51" (3/3) ... [2021-11-07 08:12:51,284 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem18_label35.c [2021-11-07 08:12:51,293 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:12:51,293 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:12:51,363 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:12:51,373 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 [2021-11-07 08:12:51,373 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:12:51,414 INFO L276 IsEmpty]: Start isEmpty. Operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:51,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 08:12:51,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:12:51,420 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:51,421 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:12:51,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:51,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1414013846, now seen corresponding path program 1 times [2021-11-07 08:12:51,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:12:51,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95839209] [2021-11-07 08:12:51,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:51,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:12:51,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:12:51,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:12:51,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95839209] [2021-11-07 08:12:51,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95839209] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:12:51,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:12:51,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:12:51,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76175934] [2021-11-07 08:12:51,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:12:51,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:12:51,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:12:51,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:12:51,738 INFO L87 Difference]: Start difference. First operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 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 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:57,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:12:57,368 INFO L93 Difference]: Finished difference Result 2910 states and 5661 transitions. [2021-11-07 08:12:57,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:12:57,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-11-07 08:12:57,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:12:57,407 INFO L225 Difference]: With dead ends: 2910 [2021-11-07 08:12:57,408 INFO L226 Difference]: Without dead ends: 2080 [2021-11-07 08:12:57,413 INFO L786 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 [2021-11-07 08:12:57,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-11-07 08:12:57,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 2074. [2021-11-07 08:12:57,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 1.5561987457790643) internal successors, (3226), 2073 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:57,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3226 transitions. [2021-11-07 08:12:57,544 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3226 transitions. Word has length 14 [2021-11-07 08:12:57,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:12:57,545 INFO L470 AbstractCegarLoop]: Abstraction has 2074 states and 3226 transitions. [2021-11-07 08:12:57,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:57,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3226 transitions. [2021-11-07 08:12:57,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-07 08:12:57,554 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:12:57,554 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:57,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:12:57,555 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:12:57,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:57,556 INFO L85 PathProgramCache]: Analyzing trace with hash -115162581, now seen corresponding path program 1 times [2021-11-07 08:12:57,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:12:57,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506539425] [2021-11-07 08:12:57,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:57,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:12:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 08:12:57,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:12:57,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506539425] [2021-11-07 08:12:57,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506539425] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:12:57,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:12:57,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:12:57,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830293192] [2021-11-07 08:12:57,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:12:57,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:12:57,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:12:57,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:12:57,912 INFO L87 Difference]: Start difference. First operand 2074 states and 3226 transitions. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:03,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:03,073 INFO L93 Difference]: Finished difference Result 6906 states and 10879 transitions. [2021-11-07 08:13:03,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:13:03,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 174 [2021-11-07 08:13:03,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:03,103 INFO L225 Difference]: With dead ends: 6906 [2021-11-07 08:13:03,103 INFO L226 Difference]: Without dead ends: 4834 [2021-11-07 08:13:03,108 INFO L786 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 [2021-11-07 08:13:03,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4834 states. [2021-11-07 08:13:03,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4834 to 4144. [2021-11-07 08:13:03,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4144 states, 4143 states have (on average 1.3405744629495535) internal successors, (5554), 4143 states have internal predecessors, (5554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 5554 transitions. [2021-11-07 08:13:03,257 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 5554 transitions. Word has length 174 [2021-11-07 08:13:03,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:03,260 INFO L470 AbstractCegarLoop]: Abstraction has 4144 states and 5554 transitions. [2021-11-07 08:13:03,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:03,260 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 5554 transitions. [2021-11-07 08:13:03,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-07 08:13:03,272 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:03,273 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:03,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:13:03,274 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:03,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:03,286 INFO L85 PathProgramCache]: Analyzing trace with hash 412173493, now seen corresponding path program 1 times [2021-11-07 08:13:03,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:03,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139861538] [2021-11-07 08:13:03,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:03,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:03,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:03,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139861538] [2021-11-07 08:13:03,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139861538] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:03,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:13:03,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:13:03,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996481386] [2021-11-07 08:13:03,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:13:03,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:03,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:13:03,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:13:03,599 INFO L87 Difference]: Start difference. First operand 4144 states and 5554 transitions. Second operand has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:06,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:06,567 INFO L93 Difference]: Finished difference Result 10409 states and 13871 transitions. [2021-11-07 08:13:06,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:13:06,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 264 [2021-11-07 08:13:06,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:06,611 INFO L225 Difference]: With dead ends: 10409 [2021-11-07 08:13:06,612 INFO L226 Difference]: Without dead ends: 6214 [2021-11-07 08:13:06,617 INFO L786 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 [2021-11-07 08:13:06,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6214 states. [2021-11-07 08:13:06,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6214 to 5524. [2021-11-07 08:13:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 5523 states have (on average 1.196089082020641) internal successors, (6606), 5523 states have internal predecessors, (6606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:06,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 6606 transitions. [2021-11-07 08:13:06,742 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 6606 transitions. Word has length 264 [2021-11-07 08:13:06,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:06,743 INFO L470 AbstractCegarLoop]: Abstraction has 5524 states and 6606 transitions. [2021-11-07 08:13:06,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:06,744 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 6606 transitions. [2021-11-07 08:13:06,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 897 [2021-11-07 08:13:06,779 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:06,780 INFO L513 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:13:06,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:13:06,781 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:06,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:06,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1939863334, now seen corresponding path program 1 times [2021-11-07 08:13:06,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:06,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194154180] [2021-11-07 08:13:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:06,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-11-07 08:13:07,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:07,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194154180] [2021-11-07 08:13:07,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194154180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:07,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:13:07,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:13:07,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070627003] [2021-11-07 08:13:07,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:07,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:07,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:07,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:13:07,569 INFO L87 Difference]: Start difference. First operand 5524 states and 6606 transitions. Second operand has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 2 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:09,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:09,821 INFO L93 Difference]: Finished difference Result 12426 states and 14971 transitions. [2021-11-07 08:13:09,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:09,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 2 states have internal predecessors, (532), 0 states have call successors, (0), 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 896 [2021-11-07 08:13:09,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:09,864 INFO L225 Difference]: With dead ends: 12426 [2021-11-07 08:13:09,865 INFO L226 Difference]: Without dead ends: 6904 [2021-11-07 08:13:09,872 INFO L786 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 [2021-11-07 08:13:09,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6904 states. [2021-11-07 08:13:09,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6904 to 6904. [2021-11-07 08:13:10,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 6903 states have (on average 1.192814718238447) internal successors, (8234), 6903 states have internal predecessors, (8234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:10,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 8234 transitions. [2021-11-07 08:13:10,027 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 8234 transitions. Word has length 896 [2021-11-07 08:13:10,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:10,029 INFO L470 AbstractCegarLoop]: Abstraction has 6904 states and 8234 transitions. [2021-11-07 08:13:10,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 2 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:10,030 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 8234 transitions. [2021-11-07 08:13:10,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 919 [2021-11-07 08:13:10,039 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:10,040 INFO L513 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:13:10,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:13:10,041 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:10,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:10,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1698237711, now seen corresponding path program 1 times [2021-11-07 08:13:10,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:10,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860505978] [2021-11-07 08:13:10,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:10,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-11-07 08:13:10,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:10,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860505978] [2021-11-07 08:13:10,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860505978] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:10,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:13:10,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:13:10,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310444291] [2021-11-07 08:13:10,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:10,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:10,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:10,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:13:10,696 INFO L87 Difference]: Start difference. First operand 6904 states and 8234 transitions. Second operand has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 2 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:12,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:12,951 INFO L93 Difference]: Finished difference Result 16566 states and 20399 transitions. [2021-11-07 08:13:12,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:12,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 2 states have internal predecessors, (532), 0 states have call successors, (0), 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 918 [2021-11-07 08:13:12,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:12,998 INFO L225 Difference]: With dead ends: 16566 [2021-11-07 08:13:12,999 INFO L226 Difference]: Without dead ends: 9664 [2021-11-07 08:13:13,007 INFO L786 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 [2021-11-07 08:13:13,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9664 states. [2021-11-07 08:13:13,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9664 to 8974. [2021-11-07 08:13:13,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8974 states, 8973 states have (on average 1.1651621531260448) internal successors, (10455), 8973 states have internal predecessors, (10455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:13,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8974 states to 8974 states and 10455 transitions. [2021-11-07 08:13:13,189 INFO L78 Accepts]: Start accepts. Automaton has 8974 states and 10455 transitions. Word has length 918 [2021-11-07 08:13:13,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:13,191 INFO L470 AbstractCegarLoop]: Abstraction has 8974 states and 10455 transitions. [2021-11-07 08:13:13,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 2 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:13,191 INFO L276 IsEmpty]: Start isEmpty. Operand 8974 states and 10455 transitions. [2021-11-07 08:13:13,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 983 [2021-11-07 08:13:13,230 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:13,232 INFO L513 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:13:13,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:13:13,233 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:13,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:13,234 INFO L85 PathProgramCache]: Analyzing trace with hash -577411939, now seen corresponding path program 1 times [2021-11-07 08:13:13,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:13,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883306631] [2021-11-07 08:13:13,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:13,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-11-07 08:13:13,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:13,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883306631] [2021-11-07 08:13:13,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883306631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:13,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:13:13,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:13:13,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299958876] [2021-11-07 08:13:13,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:13,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:13,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:13,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:13:13,788 INFO L87 Difference]: Start difference. First operand 8974 states and 10455 transitions. Second operand has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:15,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:15,674 INFO L93 Difference]: Finished difference Result 17946 states and 20908 transitions. [2021-11-07 08:13:15,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:15,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 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 982 [2021-11-07 08:13:15,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:15,696 INFO L225 Difference]: With dead ends: 17946 [2021-11-07 08:13:15,696 INFO L226 Difference]: Without dead ends: 8974 [2021-11-07 08:13:15,705 INFO L786 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 [2021-11-07 08:13:15,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8974 states. [2021-11-07 08:13:15,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8974 to 8974. [2021-11-07 08:13:15,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8974 states, 8973 states have (on average 1.1456591998216872) internal successors, (10280), 8973 states have internal predecessors, (10280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8974 states to 8974 states and 10280 transitions. [2021-11-07 08:13:15,923 INFO L78 Accepts]: Start accepts. Automaton has 8974 states and 10280 transitions. Word has length 982 [2021-11-07 08:13:15,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:15,925 INFO L470 AbstractCegarLoop]: Abstraction has 8974 states and 10280 transitions. [2021-11-07 08:13:15,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 8974 states and 10280 transitions. [2021-11-07 08:13:15,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1037 [2021-11-07 08:13:15,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:15,940 INFO L513 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 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, 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] [2021-11-07 08:13:15,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:13:15,941 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:15,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:15,942 INFO L85 PathProgramCache]: Analyzing trace with hash 752107766, now seen corresponding path program 1 times [2021-11-07 08:13:15,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:15,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275758451] [2021-11-07 08:13:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:15,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 540 proven. 0 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2021-11-07 08:13:16,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:16,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275758451] [2021-11-07 08:13:16,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275758451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:16,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:13:16,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:13:16,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711858395] [2021-11-07 08:13:16,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:16,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:16,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:16,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:13:16,440 INFO L87 Difference]: Start difference. First operand 8974 states and 10280 transitions. Second operand has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:18,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:18,674 INFO L93 Difference]: Finished difference Result 24156 states and 27941 transitions. [2021-11-07 08:13:18,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:18,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 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 1036 [2021-11-07 08:13:18,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:18,709 INFO L225 Difference]: With dead ends: 24156 [2021-11-07 08:13:18,710 INFO L226 Difference]: Without dead ends: 15184 [2021-11-07 08:13:18,719 INFO L786 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 [2021-11-07 08:13:18,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15184 states. [2021-11-07 08:13:18,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15184 to 14494. [2021-11-07 08:13:18,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14494 states, 14493 states have (on average 1.1217829296901953) internal successors, (16258), 14493 states have internal predecessors, (16258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:18,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14494 states to 14494 states and 16258 transitions. [2021-11-07 08:13:18,937 INFO L78 Accepts]: Start accepts. Automaton has 14494 states and 16258 transitions. Word has length 1036 [2021-11-07 08:13:18,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:18,938 INFO L470 AbstractCegarLoop]: Abstraction has 14494 states and 16258 transitions. [2021-11-07 08:13:18,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:18,939 INFO L276 IsEmpty]: Start isEmpty. Operand 14494 states and 16258 transitions. [2021-11-07 08:13:18,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1072 [2021-11-07 08:13:18,953 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:18,954 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:13:18,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 08:13:18,954 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:18,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:18,955 INFO L85 PathProgramCache]: Analyzing trace with hash -2132068333, now seen corresponding path program 1 times [2021-11-07 08:13:18,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:18,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562178944] [2021-11-07 08:13:18,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:18,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:19,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 302 proven. 537 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-11-07 08:13:19,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:19,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562178944] [2021-11-07 08:13:19,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562178944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:19,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704972984] [2021-11-07 08:13:19,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:19,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:19,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:19,709 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:19,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:13:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:20,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:13:20,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 391 proven. 0 refuted. 0 times theorem prover too weak. 669 trivial. 0 not checked. [2021-11-07 08:13:22,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704972984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:22,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:13:22,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-07 08:13:22,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755805504] [2021-11-07 08:13:22,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:22,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:22,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:22,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:13:22,745 INFO L87 Difference]: Start difference. First operand 14494 states and 16258 transitions. Second operand has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:24,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:24,797 INFO L93 Difference]: Finished difference Result 34506 states and 38573 transitions. [2021-11-07 08:13:24,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:24,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 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 1071 [2021-11-07 08:13:24,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:24,823 INFO L225 Difference]: With dead ends: 34506 [2021-11-07 08:13:24,823 INFO L226 Difference]: Without dead ends: 16564 [2021-11-07 08:13:24,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1076 GetRequests, 1071 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:13:24,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16564 states. [2021-11-07 08:13:25,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16564 to 15874. [2021-11-07 08:13:25,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15874 states, 15873 states have (on average 1.0636930636930637) internal successors, (16884), 15873 states have internal predecessors, (16884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:25,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15874 states to 15874 states and 16884 transitions. [2021-11-07 08:13:25,047 INFO L78 Accepts]: Start accepts. Automaton has 15874 states and 16884 transitions. Word has length 1071 [2021-11-07 08:13:25,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:25,050 INFO L470 AbstractCegarLoop]: Abstraction has 15874 states and 16884 transitions. [2021-11-07 08:13:25,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:25,050 INFO L276 IsEmpty]: Start isEmpty. Operand 15874 states and 16884 transitions. [2021-11-07 08:13:25,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1183 [2021-11-07 08:13:25,070 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:25,071 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 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] [2021-11-07 08:13:25,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:25,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-07 08:13:25,297 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:25,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1075991749, now seen corresponding path program 1 times [2021-11-07 08:13:25,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:25,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827233468] [2021-11-07 08:13:25,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:25,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1539 backedges. 829 proven. 630 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-07 08:13:26,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:26,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827233468] [2021-11-07 08:13:26,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827233468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:26,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071349120] [2021-11-07 08:13:26,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:26,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:26,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:26,113 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:26,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:13:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:26,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 1421 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:13:26,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1539 backedges. 855 proven. 0 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2021-11-07 08:13:29,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071349120] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:29,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:13:29,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-07 08:13:29,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595593055] [2021-11-07 08:13:29,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:29,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:29,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:29,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:13:29,099 INFO L87 Difference]: Start difference. First operand 15874 states and 16884 transitions. Second operand has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:30,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:30,748 INFO L93 Difference]: Finished difference Result 31056 states and 33075 transitions. [2021-11-07 08:13:30,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:30,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 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 1182 [2021-11-07 08:13:30,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:30,780 INFO L225 Difference]: With dead ends: 31056 [2021-11-07 08:13:30,781 INFO L226 Difference]: Without dead ends: 15874 [2021-11-07 08:13:30,792 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1188 GetRequests, 1182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:13:30,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15874 states. [2021-11-07 08:13:31,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15874 to 15874. [2021-11-07 08:13:31,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15874 states, 15873 states have (on average 1.0448560448560449) internal successors, (16585), 15873 states have internal predecessors, (16585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:31,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15874 states to 15874 states and 16585 transitions. [2021-11-07 08:13:31,096 INFO L78 Accepts]: Start accepts. Automaton has 15874 states and 16585 transitions. Word has length 1182 [2021-11-07 08:13:31,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:31,098 INFO L470 AbstractCegarLoop]: Abstraction has 15874 states and 16585 transitions. [2021-11-07 08:13:31,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 15874 states and 16585 transitions. [2021-11-07 08:13:31,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1225 [2021-11-07 08:13:31,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:31,131 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:31,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:31,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:31,346 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:31,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:31,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1675762051, now seen corresponding path program 1 times [2021-11-07 08:13:31,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:31,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346712454] [2021-11-07 08:13:31,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:31,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 1019 proven. 0 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2021-11-07 08:13:32,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:32,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346712454] [2021-11-07 08:13:32,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346712454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:32,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:13:32,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:13:32,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537159655] [2021-11-07 08:13:32,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:13:32,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:32,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:13:32,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:13:32,038 INFO L87 Difference]: Start difference. First operand 15874 states and 16585 transitions. Second operand has 4 states, 4 states have (on average 205.25) internal successors, (821), 3 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:35,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:35,049 INFO L93 Difference]: Finished difference Result 35886 states and 37620 transitions. [2021-11-07 08:13:35,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:13:35,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 205.25) internal successors, (821), 3 states have internal predecessors, (821), 0 states have call successors, (0), 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 1224 [2021-11-07 08:13:35,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:35,086 INFO L225 Difference]: With dead ends: 35886 [2021-11-07 08:13:35,086 INFO L226 Difference]: Without dead ends: 20704 [2021-11-07 08:13:35,095 INFO L786 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 [2021-11-07 08:13:35,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20704 states. [2021-11-07 08:13:35,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20704 to 20014. [2021-11-07 08:13:35,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20014 states, 20013 states have (on average 1.0418727826912506) internal successors, (20851), 20013 states have internal predecessors, (20851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:35,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20014 states to 20014 states and 20851 transitions. [2021-11-07 08:13:35,333 INFO L78 Accepts]: Start accepts. Automaton has 20014 states and 20851 transitions. Word has length 1224 [2021-11-07 08:13:35,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:35,335 INFO L470 AbstractCegarLoop]: Abstraction has 20014 states and 20851 transitions. [2021-11-07 08:13:35,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 205.25) internal successors, (821), 3 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:35,335 INFO L276 IsEmpty]: Start isEmpty. Operand 20014 states and 20851 transitions. [2021-11-07 08:13:35,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1265 [2021-11-07 08:13:35,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:35,360 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:35,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:13:35,361 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:35,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:35,362 INFO L85 PathProgramCache]: Analyzing trace with hash 2065223256, now seen corresponding path program 1 times [2021-11-07 08:13:35,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:35,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235378440] [2021-11-07 08:13:35,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:35,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:36,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 507 proven. 729 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2021-11-07 08:13:36,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:36,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235378440] [2021-11-07 08:13:36,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235378440] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:36,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735059922] [2021-11-07 08:13:36,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:36,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:36,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:36,133 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:36,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:13:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:37,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 1502 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:13:37,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 1634 trivial. 0 not checked. [2021-11-07 08:13:39,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735059922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:39,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:13:39,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-07 08:13:39,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314831052] [2021-11-07 08:13:39,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:39,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:39,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:39,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:13:39,548 INFO L87 Difference]: Start difference. First operand 20014 states and 20851 transitions. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:41,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:41,463 INFO L93 Difference]: Finished difference Result 44856 states and 46981 transitions. [2021-11-07 08:13:41,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:41,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 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 1264 [2021-11-07 08:13:41,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:41,503 INFO L225 Difference]: With dead ends: 44856 [2021-11-07 08:13:41,503 INFO L226 Difference]: Without dead ends: 24844 [2021-11-07 08:13:41,517 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1269 GetRequests, 1264 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:13:41,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24844 states. [2021-11-07 08:13:41,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24844 to 24844. [2021-11-07 08:13:41,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24844 states, 24843 states have (on average 1.0415811294932174) internal successors, (25876), 24843 states have internal predecessors, (25876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:41,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24844 states to 24844 states and 25876 transitions. [2021-11-07 08:13:41,967 INFO L78 Accepts]: Start accepts. Automaton has 24844 states and 25876 transitions. Word has length 1264 [2021-11-07 08:13:41,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:41,969 INFO L470 AbstractCegarLoop]: Abstraction has 24844 states and 25876 transitions. [2021-11-07 08:13:41,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:41,969 INFO L276 IsEmpty]: Start isEmpty. Operand 24844 states and 25876 transitions. [2021-11-07 08:13:42,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1309 [2021-11-07 08:13:42,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:42,010 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:42,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:42,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:42,225 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:42,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:42,226 INFO L85 PathProgramCache]: Analyzing trace with hash 2034812540, now seen corresponding path program 1 times [2021-11-07 08:13:42,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:42,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615070203] [2021-11-07 08:13:42,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:42,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1632 backedges. 484 proven. 1062 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-07 08:13:42,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:42,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615070203] [2021-11-07 08:13:42,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615070203] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:42,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274442180] [2021-11-07 08:13:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:42,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:42,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:42,991 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:43,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:13:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:44,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 1517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:13:44,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:47,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1632 backedges. 582 proven. 0 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2021-11-07 08:13:47,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274442180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:47,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:13:47,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-07 08:13:47,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838063978] [2021-11-07 08:13:47,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:47,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:47,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:47,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:13:47,045 INFO L87 Difference]: Start difference. First operand 24844 states and 25876 transitions. Second operand has 3 states, 3 states have (on average 226.33333333333334) internal successors, (679), 3 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:48,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:48,943 INFO L93 Difference]: Finished difference Result 59346 states and 62014 transitions. [2021-11-07 08:13:48,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:48,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 226.33333333333334) internal successors, (679), 3 states have internal predecessors, (679), 0 states have call successors, (0), 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 1308 [2021-11-07 08:13:48,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:48,969 INFO L225 Difference]: With dead ends: 59346 [2021-11-07 08:13:48,969 INFO L226 Difference]: Without dead ends: 35194 [2021-11-07 08:13:48,980 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1314 GetRequests, 1308 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:13:49,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35194 states. [2021-11-07 08:13:49,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35194 to 34504. [2021-11-07 08:13:49,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34504 states, 34503 states have (on average 1.0355911080195925) internal successors, (35731), 34503 states have internal predecessors, (35731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34504 states to 34504 states and 35731 transitions. [2021-11-07 08:13:49,332 INFO L78 Accepts]: Start accepts. Automaton has 34504 states and 35731 transitions. Word has length 1308 [2021-11-07 08:13:49,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:49,333 INFO L470 AbstractCegarLoop]: Abstraction has 34504 states and 35731 transitions. [2021-11-07 08:13:49,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 226.33333333333334) internal successors, (679), 3 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:49,333 INFO L276 IsEmpty]: Start isEmpty. Operand 34504 states and 35731 transitions. [2021-11-07 08:13:49,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1311 [2021-11-07 08:13:49,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:49,360 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:49,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:49,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 08:13:49,569 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:49,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:49,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1562195461, now seen corresponding path program 1 times [2021-11-07 08:13:49,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:49,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247245741] [2021-11-07 08:13:49,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:49,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1885 backedges. 516 proven. 0 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2021-11-07 08:13:50,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:50,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247245741] [2021-11-07 08:13:50,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247245741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:50,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:13:50,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:13:50,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226825166] [2021-11-07 08:13:50,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:50,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:50,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:50,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:13:50,300 INFO L87 Difference]: Start difference. First operand 34504 states and 35731 transitions. Second operand has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:52,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:52,297 INFO L93 Difference]: Finished difference Result 75906 states and 78756 transitions. [2021-11-07 08:13:52,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:52,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 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 1310 [2021-11-07 08:13:52,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:52,332 INFO L225 Difference]: With dead ends: 75906 [2021-11-07 08:13:52,332 INFO L226 Difference]: Without dead ends: 42094 [2021-11-07 08:13:52,348 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:13:52,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42094 states. [2021-11-07 08:13:52,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42094 to 40024. [2021-11-07 08:13:52,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40024 states, 40023 states have (on average 1.033805561801964) internal successors, (41376), 40023 states have internal predecessors, (41376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:52,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40024 states to 40024 states and 41376 transitions. [2021-11-07 08:13:52,769 INFO L78 Accepts]: Start accepts. Automaton has 40024 states and 41376 transitions. Word has length 1310 [2021-11-07 08:13:52,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:52,769 INFO L470 AbstractCegarLoop]: Abstraction has 40024 states and 41376 transitions. [2021-11-07 08:13:52,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:52,770 INFO L276 IsEmpty]: Start isEmpty. Operand 40024 states and 41376 transitions. [2021-11-07 08:13:52,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1385 [2021-11-07 08:13:52,794 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:52,795 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:13:52,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:13:52,795 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:52,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:52,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1778542585, now seen corresponding path program 1 times [2021-11-07 08:13:52,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:52,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832990700] [2021-11-07 08:13:52,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:52,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2050 backedges. 1315 proven. 0 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2021-11-07 08:13:53,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:53,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832990700] [2021-11-07 08:13:53,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832990700] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:53,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:13:53,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:13:53,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879143015] [2021-11-07 08:13:53,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:53,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:53,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:53,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:13:53,520 INFO L87 Difference]: Start difference. First operand 40024 states and 41376 transitions. Second operand has 3 states, 3 states have (on average 302.3333333333333) internal successors, (907), 3 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:55,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:55,506 INFO L93 Difference]: Finished difference Result 89706 states and 93042 transitions. [2021-11-07 08:13:55,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:55,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 302.3333333333333) internal successors, (907), 3 states have internal predecessors, (907), 0 states have call successors, (0), 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 1384 [2021-11-07 08:13:55,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:55,547 INFO L225 Difference]: With dead ends: 89706 [2021-11-07 08:13:55,547 INFO L226 Difference]: Without dead ends: 49684 [2021-11-07 08:13:55,563 INFO L786 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 [2021-11-07 08:13:55,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49684 states. [2021-11-07 08:13:55,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49684 to 49684. [2021-11-07 08:13:56,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49684 states, 49683 states have (on average 1.0333111929633878) internal successors, (51338), 49683 states have internal predecessors, (51338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:56,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49684 states to 49684 states and 51338 transitions. [2021-11-07 08:13:56,272 INFO L78 Accepts]: Start accepts. Automaton has 49684 states and 51338 transitions. Word has length 1384 [2021-11-07 08:13:56,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:56,273 INFO L470 AbstractCegarLoop]: Abstraction has 49684 states and 51338 transitions. [2021-11-07 08:13:56,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 302.3333333333333) internal successors, (907), 3 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:56,273 INFO L276 IsEmpty]: Start isEmpty. Operand 49684 states and 51338 transitions. [2021-11-07 08:13:56,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1472 [2021-11-07 08:13:56,311 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:56,312 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:56,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 08:13:56,312 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:56,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:56,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1634052707, now seen corresponding path program 1 times [2021-11-07 08:13:56,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:56,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040259647] [2021-11-07 08:13:56,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:56,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2367 backedges. 721 proven. 1353 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-11-07 08:13:57,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:57,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040259647] [2021-11-07 08:13:57,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040259647] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:57,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593949523] [2021-11-07 08:13:57,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:57,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:57,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:57,337 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:57,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:13:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:59,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 1740 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:13:59,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:02,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2367 backedges. 1335 proven. 0 refuted. 0 times theorem prover too weak. 1032 trivial. 0 not checked. [2021-11-07 08:14:02,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593949523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:02,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:14:02,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-07 08:14:02,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315845005] [2021-11-07 08:14:02,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:02,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:02,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:02,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:14:02,203 INFO L87 Difference]: Start difference. First operand 49684 states and 51338 transitions. Second operand has 3 states, 3 states have (on average 288.6666666666667) internal successors, (866), 3 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:04,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:04,149 INFO L93 Difference]: Finished difference Result 98676 states and 101983 transitions. [2021-11-07 08:14:04,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:14:04,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 288.6666666666667) internal successors, (866), 3 states have internal predecessors, (866), 0 states have call successors, (0), 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 1471 [2021-11-07 08:14:04,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:04,190 INFO L225 Difference]: With dead ends: 98676 [2021-11-07 08:14:04,190 INFO L226 Difference]: Without dead ends: 49684 [2021-11-07 08:14:04,204 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1477 GetRequests, 1471 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:14:04,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49684 states. [2021-11-07 08:14:04,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49684 to 48994. [2021-11-07 08:14:04,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48994 states, 48993 states have (on average 1.0251056273345172) internal successors, (50223), 48993 states have internal predecessors, (50223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:04,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48994 states to 48994 states and 50223 transitions. [2021-11-07 08:14:04,861 INFO L78 Accepts]: Start accepts. Automaton has 48994 states and 50223 transitions. Word has length 1471 [2021-11-07 08:14:04,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:04,862 INFO L470 AbstractCegarLoop]: Abstraction has 48994 states and 50223 transitions. [2021-11-07 08:14:04,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 288.6666666666667) internal successors, (866), 3 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:04,863 INFO L276 IsEmpty]: Start isEmpty. Operand 48994 states and 50223 transitions. [2021-11-07 08:14:04,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1489 [2021-11-07 08:14:04,895 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:04,896 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:04,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:05,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 08:14:05,119 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:05,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:05,120 INFO L85 PathProgramCache]: Analyzing trace with hash 2047422302, now seen corresponding path program 1 times [2021-11-07 08:14:05,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:05,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710323455] [2021-11-07 08:14:05,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:05,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1995 backedges. 418 proven. 0 refuted. 0 times theorem prover too weak. 1577 trivial. 0 not checked. [2021-11-07 08:14:06,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:06,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710323455] [2021-11-07 08:14:06,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710323455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:06,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:06,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:14:06,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463777602] [2021-11-07 08:14:06,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:06,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:06,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:06,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:06,215 INFO L87 Difference]: Start difference. First operand 48994 states and 50223 transitions. Second operand has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:08,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:08,276 INFO L93 Difference]: Finished difference Result 97986 states and 100449 transitions. [2021-11-07 08:14:08,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:14:08,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 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 1488 [2021-11-07 08:14:08,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:08,319 INFO L225 Difference]: With dead ends: 97986 [2021-11-07 08:14:08,319 INFO L226 Difference]: Without dead ends: 49684 [2021-11-07 08:14:08,337 INFO L786 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 [2021-11-07 08:14:08,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49684 states. [2021-11-07 08:14:08,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49684 to 48994. [2021-11-07 08:14:08,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48994 states, 48993 states have (on average 1.0243912395648358) internal successors, (50188), 48993 states have internal predecessors, (50188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:08,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48994 states to 48994 states and 50188 transitions. [2021-11-07 08:14:08,853 INFO L78 Accepts]: Start accepts. Automaton has 48994 states and 50188 transitions. Word has length 1488 [2021-11-07 08:14:08,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:08,854 INFO L470 AbstractCegarLoop]: Abstraction has 48994 states and 50188 transitions. [2021-11-07 08:14:08,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:08,855 INFO L276 IsEmpty]: Start isEmpty. Operand 48994 states and 50188 transitions. [2021-11-07 08:14:08,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1547 [2021-11-07 08:14:08,884 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:08,885 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:08,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 08:14:08,886 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:08,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:08,887 INFO L85 PathProgramCache]: Analyzing trace with hash -605450873, now seen corresponding path program 1 times [2021-11-07 08:14:08,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:08,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049864701] [2021-11-07 08:14:08,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:08,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 2161 trivial. 0 not checked. [2021-11-07 08:14:09,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:09,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049864701] [2021-11-07 08:14:09,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049864701] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:09,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:09,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:14:09,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079415930] [2021-11-07 08:14:09,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:09,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:09,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:09,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:09,712 INFO L87 Difference]: Start difference. First operand 48994 states and 50188 transitions. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:11,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:11,658 INFO L93 Difference]: Finished difference Result 98676 states and 101106 transitions. [2021-11-07 08:14:11,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:14:11,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 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 1546 [2021-11-07 08:14:11,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:11,701 INFO L225 Difference]: With dead ends: 98676 [2021-11-07 08:14:11,701 INFO L226 Difference]: Without dead ends: 49684 [2021-11-07 08:14:11,717 INFO L786 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 [2021-11-07 08:14:11,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49684 states. [2021-11-07 08:14:12,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49684 to 48304. [2021-11-07 08:14:12,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48304 states, 48303 states have (on average 1.0204749187421072) internal successors, (49292), 48303 states have internal predecessors, (49292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:12,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48304 states to 48304 states and 49292 transitions. [2021-11-07 08:14:12,269 INFO L78 Accepts]: Start accepts. Automaton has 48304 states and 49292 transitions. Word has length 1546 [2021-11-07 08:14:12,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:12,270 INFO L470 AbstractCegarLoop]: Abstraction has 48304 states and 49292 transitions. [2021-11-07 08:14:12,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:12,271 INFO L276 IsEmpty]: Start isEmpty. Operand 48304 states and 49292 transitions. [2021-11-07 08:14:12,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1629 [2021-11-07 08:14:12,328 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:12,328 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:14:12,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 08:14:12,329 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:12,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:12,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2096764558, now seen corresponding path program 1 times [2021-11-07 08:14:12,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:12,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110920106] [2021-11-07 08:14:12,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:12,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2536 backedges. 1793 proven. 0 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2021-11-07 08:14:13,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:13,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110920106] [2021-11-07 08:14:13,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110920106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:13,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:13,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:14:13,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780428379] [2021-11-07 08:14:13,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:13,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:13,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:13,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:13,200 INFO L87 Difference]: Start difference. First operand 48304 states and 49292 transitions. Second operand has 3 states, 3 states have (on average 335.0) internal successors, (1005), 3 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:15,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:15,282 INFO L93 Difference]: Finished difference Result 123516 states and 126147 transitions. [2021-11-07 08:14:15,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:14:15,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 335.0) internal successors, (1005), 3 states have internal predecessors, (1005), 0 states have call successors, (0), 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 1628 [2021-11-07 08:14:15,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:15,340 INFO L225 Difference]: With dead ends: 123516 [2021-11-07 08:14:15,340 INFO L226 Difference]: Without dead ends: 75214 [2021-11-07 08:14:15,360 INFO L786 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 [2021-11-07 08:14:15,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75214 states. [2021-11-07 08:14:15,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75214 to 74524. [2021-11-07 08:14:16,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74524 states, 74523 states have (on average 1.0183970049514914) internal successors, (75894), 74523 states have internal predecessors, (75894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:16,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74524 states to 74524 states and 75894 transitions. [2021-11-07 08:14:16,418 INFO L78 Accepts]: Start accepts. Automaton has 74524 states and 75894 transitions. Word has length 1628 [2021-11-07 08:14:16,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:16,419 INFO L470 AbstractCegarLoop]: Abstraction has 74524 states and 75894 transitions. [2021-11-07 08:14:16,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 335.0) internal successors, (1005), 3 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:16,419 INFO L276 IsEmpty]: Start isEmpty. Operand 74524 states and 75894 transitions. [2021-11-07 08:14:16,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1789 [2021-11-07 08:14:16,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:16,477 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:14:16,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 08:14:16,477 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:16,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:16,478 INFO L85 PathProgramCache]: Analyzing trace with hash -940235705, now seen corresponding path program 1 times [2021-11-07 08:14:16,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:16,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332644391] [2021-11-07 08:14:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:16,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3392 backedges. 2514 proven. 291 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2021-11-07 08:14:17,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:17,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332644391] [2021-11-07 08:14:17,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332644391] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:17,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991552629] [2021-11-07 08:14:17,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:17,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:17,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:17,517 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:17,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:14:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:19,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 2054 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:14:19,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3392 backedges. 2179 proven. 318 refuted. 0 times theorem prover too weak. 895 trivial. 0 not checked. [2021-11-07 08:14:24,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991552629] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:24,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:24,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-07 08:14:24,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010124559] [2021-11-07 08:14:24,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:14:24,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:24,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:14:24,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:14:24,515 INFO L87 Difference]: Start difference. First operand 74524 states and 75894 transitions. Second operand has 8 states, 8 states have (on average 257.125) internal successors, (2057), 8 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:33,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:33,527 INFO L93 Difference]: Finished difference Result 203556 states and 207642 transitions. [2021-11-07 08:14:33,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 08:14:33,528 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 257.125) internal successors, (2057), 8 states have internal predecessors, (2057), 0 states have call successors, (0), 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 1788 [2021-11-07 08:14:33,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:33,648 INFO L225 Difference]: With dead ends: 203556 [2021-11-07 08:14:33,648 INFO L226 Difference]: Without dead ends: 129724 [2021-11-07 08:14:33,672 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1808 GetRequests, 1794 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:14:33,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129724 states. [2021-11-07 08:14:35,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129724 to 118684. [2021-11-07 08:14:35,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118684 states, 118683 states have (on average 1.0171128131240363) internal successors, (120714), 118683 states have internal predecessors, (120714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:35,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118684 states to 118684 states and 120714 transitions. [2021-11-07 08:14:35,197 INFO L78 Accepts]: Start accepts. Automaton has 118684 states and 120714 transitions. Word has length 1788 [2021-11-07 08:14:35,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:35,198 INFO L470 AbstractCegarLoop]: Abstraction has 118684 states and 120714 transitions. [2021-11-07 08:14:35,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 257.125) internal successors, (2057), 8 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:35,198 INFO L276 IsEmpty]: Start isEmpty. Operand 118684 states and 120714 transitions. [2021-11-07 08:14:35,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1818 [2021-11-07 08:14:35,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:35,556 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:14:35,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-07 08:14:35,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:35,757 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:35,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:35,758 INFO L85 PathProgramCache]: Analyzing trace with hash 2092532574, now seen corresponding path program 1 times [2021-11-07 08:14:35,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:35,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405072055] [2021-11-07 08:14:35,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:35,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3377 backedges. 1805 proven. 0 refuted. 0 times theorem prover too weak. 1572 trivial. 0 not checked. [2021-11-07 08:14:36,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:36,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405072055] [2021-11-07 08:14:36,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405072055] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:36,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:36,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:14:36,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242264074] [2021-11-07 08:14:36,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:14:36,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:36,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:14:36,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:14:36,493 INFO L87 Difference]: Start difference. First operand 118684 states and 120714 transitions. Second operand has 4 states, 4 states have (on average 255.5) internal successors, (1022), 4 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:40,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:40,807 INFO L93 Difference]: Finished difference Result 268416 states and 273061 transitions. [2021-11-07 08:14:40,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:14:40,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 255.5) internal successors, (1022), 4 states have internal predecessors, (1022), 0 states have call successors, (0), 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 1817 [2021-11-07 08:14:40,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:40,981 INFO L225 Difference]: With dead ends: 268416 [2021-11-07 08:14:40,981 INFO L226 Difference]: Without dead ends: 150424 [2021-11-07 08:14:41,028 INFO L786 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 [2021-11-07 08:14:41,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150424 states. [2021-11-07 08:14:42,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150424 to 127654. [2021-11-07 08:14:42,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127654 states, 127653 states have (on average 1.0168425340571705) internal successors, (129803), 127653 states have internal predecessors, (129803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:43,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127654 states to 127654 states and 129803 transitions. [2021-11-07 08:14:43,061 INFO L78 Accepts]: Start accepts. Automaton has 127654 states and 129803 transitions. Word has length 1817 [2021-11-07 08:14:43,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:43,063 INFO L470 AbstractCegarLoop]: Abstraction has 127654 states and 129803 transitions. [2021-11-07 08:14:43,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 255.5) internal successors, (1022), 4 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:43,063 INFO L276 IsEmpty]: Start isEmpty. Operand 127654 states and 129803 transitions. [2021-11-07 08:14:43,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2001 [2021-11-07 08:14:43,135 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:43,136 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:43,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 08:14:43,137 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:43,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:43,138 INFO L85 PathProgramCache]: Analyzing trace with hash -313120467, now seen corresponding path program 1 times [2021-11-07 08:14:43,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:43,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431687808] [2021-11-07 08:14:43,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:43,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4157 backedges. 2994 proven. 0 refuted. 0 times theorem prover too weak. 1163 trivial. 0 not checked. [2021-11-07 08:14:44,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:44,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431687808] [2021-11-07 08:14:44,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431687808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:44,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:44,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:14:44,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13945330] [2021-11-07 08:14:44,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:44,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:44,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:44,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:44,462 INFO L87 Difference]: Start difference. First operand 127654 states and 129803 transitions. Second operand has 3 states, 3 states have (on average 370.6666666666667) internal successors, (1112), 3 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:47,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:47,294 INFO L93 Difference]: Finished difference Result 274626 states and 279376 transitions. [2021-11-07 08:14:47,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:14:47,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 370.6666666666667) internal successors, (1112), 3 states have internal predecessors, (1112), 0 states have call successors, (0), 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 2000 [2021-11-07 08:14:47,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:47,462 INFO L225 Difference]: With dead ends: 274626 [2021-11-07 08:14:47,462 INFO L226 Difference]: Without dead ends: 147664 [2021-11-07 08:14:47,511 INFO L786 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 [2021-11-07 08:14:47,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147664 states. [2021-11-07 08:14:49,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147664 to 146974. [2021-11-07 08:14:49,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146974 states, 146973 states have (on average 1.0157716043082743) internal successors, (149291), 146973 states have internal predecessors, (149291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:49,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146974 states to 146974 states and 149291 transitions. [2021-11-07 08:14:49,724 INFO L78 Accepts]: Start accepts. Automaton has 146974 states and 149291 transitions. Word has length 2000 [2021-11-07 08:14:49,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:49,725 INFO L470 AbstractCegarLoop]: Abstraction has 146974 states and 149291 transitions. [2021-11-07 08:14:49,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 370.6666666666667) internal successors, (1112), 3 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:49,726 INFO L276 IsEmpty]: Start isEmpty. Operand 146974 states and 149291 transitions. [2021-11-07 08:14:49,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2034 [2021-11-07 08:14:49,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:49,797 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:49,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 08:14:49,798 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:49,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:49,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1339838884, now seen corresponding path program 1 times [2021-11-07 08:14:49,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:49,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491460488] [2021-11-07 08:14:49,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:49,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2308 proven. 1330 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2021-11-07 08:14:51,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:51,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491460488] [2021-11-07 08:14:51,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491460488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:51,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142512924] [2021-11-07 08:14:51,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:51,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:51,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:51,604 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:51,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:14:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:54,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 2306 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:14:54,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2747 proven. 0 refuted. 0 times theorem prover too weak. 1478 trivial. 0 not checked. [2021-11-07 08:14:58,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142512924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:58,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:14:58,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-07 08:14:58,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259961341] [2021-11-07 08:14:58,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:58,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:58,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:58,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:14:58,480 INFO L87 Difference]: Start difference. First operand 146974 states and 149291 transitions. Second operand has 3 states, 3 states have (on average 382.0) internal successors, (1146), 3 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:00,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:00,906 INFO L93 Difference]: Finished difference Result 294636 states and 299284 transitions. [2021-11-07 08:15:00,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:15:00,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 382.0) internal successors, (1146), 3 states have internal predecessors, (1146), 0 states have call successors, (0), 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 2033 [2021-11-07 08:15:00,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:01,113 INFO L225 Difference]: With dead ends: 294636 [2021-11-07 08:15:01,113 INFO L226 Difference]: Without dead ends: 148354 [2021-11-07 08:15:01,180 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2039 GetRequests, 2032 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:15:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148354 states. [2021-11-07 08:15:02,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148354 to 146974. [2021-11-07 08:15:02,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146974 states, 146973 states have (on average 1.0154926415055827) internal successors, (149250), 146973 states have internal predecessors, (149250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:02,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146974 states to 146974 states and 149250 transitions. [2021-11-07 08:15:02,861 INFO L78 Accepts]: Start accepts. Automaton has 146974 states and 149250 transitions. Word has length 2033 [2021-11-07 08:15:02,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:02,862 INFO L470 AbstractCegarLoop]: Abstraction has 146974 states and 149250 transitions. [2021-11-07 08:15:02,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 382.0) internal successors, (1146), 3 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:02,863 INFO L276 IsEmpty]: Start isEmpty. Operand 146974 states and 149250 transitions. [2021-11-07 08:15:03,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2074 [2021-11-07 08:15:03,434 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:03,435 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:03,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:15:03,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30183bab-a867-439d-a668-5075cb622d04/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:03,649 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:03,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:03,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1450012432, now seen corresponding path program 1 times [2021-11-07 08:15:03,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:03,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61822313] [2021-11-07 08:15:03,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:03,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:04,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4449 backedges. 3071 proven. 0 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-11-07 08:15:04,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:04,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61822313] [2021-11-07 08:15:04,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61822313] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:04,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:04,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:15:04,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627609557] [2021-11-07 08:15:04,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:15:04,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:04,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:15:04,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:15:04,639 INFO L87 Difference]: Start difference. First operand 146974 states and 149250 transitions. Second operand has 3 states, 3 states have (on average 418.0) internal successors, (1254), 3 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)