./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label07.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_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/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_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label07.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/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_c06fda7b-805d-4344-b7d0-a3a56226b6ad/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 a8eb1c549e735c3cffa39c2cb57907d032185b5da86f8481f430bf75e1d2a903 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:25:56,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:25:56,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:25:56,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:25:56,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:25:56,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:25:56,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:25:56,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:25:56,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:25:56,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:25:56,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:25:56,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:25:56,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:25:56,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:25:56,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:25:56,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:25:56,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:25:56,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:25:56,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:25:56,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:25:56,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:25:56,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:25:56,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:25:56,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:25:56,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:25:56,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:25:56,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:25:56,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:25:56,905 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:25:56,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:25:56,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:25:56,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:25:56,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:25:56,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:25:56,916 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:25:56,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:25:56,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:25:56,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:25:56,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:25:56,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:25:56,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:25:56,921 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:25:56,967 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:25:56,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:25:56,968 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:25:56,969 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:25:56,970 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:25:56,970 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:25:56,971 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:25:56,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:25:56,971 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:25:56,972 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:25:56,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:25:56,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:25:56,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:25:56,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:25:56,973 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:25:56,973 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:25:56,974 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:25:56,974 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:25:56,974 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:25:56,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:25:56,975 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:25:56,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:25:56,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:25:56,976 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:25:56,976 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:25:56,976 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:25:56,976 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:25:56,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:25:56,977 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:25:56,977 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:25:56,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:25:56,978 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:25:56,978 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_c06fda7b-805d-4344-b7d0-a3a56226b6ad/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8eb1c549e735c3cffa39c2cb57907d032185b5da86f8481f430bf75e1d2a903 [2021-11-07 08:25:57,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:25:57,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:25:57,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:25:57,311 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:25:57,312 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:25:57,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/eca-rers2012/Problem03_label07.c [2021-11-07 08:25:57,411 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/data/4c3c7d83b/b849f82675a04a2aa486efecb538fdf1/FLAGc3c2078fa [2021-11-07 08:25:58,237 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:25:58,237 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/sv-benchmarks/c/eca-rers2012/Problem03_label07.c [2021-11-07 08:25:58,269 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/data/4c3c7d83b/b849f82675a04a2aa486efecb538fdf1/FLAGc3c2078fa [2021-11-07 08:25:58,311 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/data/4c3c7d83b/b849f82675a04a2aa486efecb538fdf1 [2021-11-07 08:25:58,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:25:58,323 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:25:58,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:25:58,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:25:58,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:25:58,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:25:58" (1/1) ... [2021-11-07 08:25:58,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c6ae757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:58, skipping insertion in model container [2021-11-07 08:25:58,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:25:58" (1/1) ... [2021-11-07 08:25:58,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:25:58,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:25:59,331 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_c06fda7b-805d-4344-b7d0-a3a56226b6ad/sv-benchmarks/c/eca-rers2012/Problem03_label07.c[57439,57452] [2021-11-07 08:25:59,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:25:59,402 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:25:59,760 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_c06fda7b-805d-4344-b7d0-a3a56226b6ad/sv-benchmarks/c/eca-rers2012/Problem03_label07.c[57439,57452] [2021-11-07 08:25:59,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:25:59,808 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:25:59,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:59 WrapperNode [2021-11-07 08:25:59,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:25:59,811 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:25:59,812 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:25:59,812 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:25:59,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:59" (1/1) ... [2021-11-07 08:25:59,887 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:59" (1/1) ... [2021-11-07 08:26:00,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:26:00,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:26:00,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:26:00,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:26:00,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:59" (1/1) ... [2021-11-07 08:26:00,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:59" (1/1) ... [2021-11-07 08:26:00,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:59" (1/1) ... [2021-11-07 08:26:00,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:59" (1/1) ... [2021-11-07 08:26:00,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:59" (1/1) ... [2021-11-07 08:26:00,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:59" (1/1) ... [2021-11-07 08:26:00,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:59" (1/1) ... [2021-11-07 08:26:00,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:26:00,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:26:00,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:26:00,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:26:00,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:59" (1/1) ... [2021-11-07 08:26:00,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:26:00,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:00,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:26:00,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:26:00,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:26:00,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:26:00,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:26:00,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:26:03,127 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:26:03,128 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 08:26:03,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:26:03 BoogieIcfgContainer [2021-11-07 08:26:03,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:26:03,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:26:03,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:26:03,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:26:03,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:25:58" (1/3) ... [2021-11-07 08:26:03,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14abfa88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:26:03, skipping insertion in model container [2021-11-07 08:26:03,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:59" (2/3) ... [2021-11-07 08:26:03,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14abfa88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:26:03, skipping insertion in model container [2021-11-07 08:26:03,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:26:03" (3/3) ... [2021-11-07 08:26:03,143 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label07.c [2021-11-07 08:26:03,149 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:26:03,150 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:26:03,213 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:26:03,221 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 08:26:03,221 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:26:03,251 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:03,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-07 08:26:03,271 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:03,272 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:03,273 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:03,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:03,281 INFO L85 PathProgramCache]: Analyzing trace with hash -58959822, now seen corresponding path program 1 times [2021-11-07 08:26:03,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:03,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512431478] [2021-11-07 08:26:03,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:03,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:04,149 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 08:26:04,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:04,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512431478] [2021-11-07 08:26:04,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512431478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:04,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:04,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:26:04,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824715268] [2021-11-07 08:26:04,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:26:04,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:04,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:26:04,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:04,208 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 08:26:05,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:05,782 INFO L93 Difference]: Finished difference Result 864 states and 1514 transitions. [2021-11-07 08:26:05,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:05,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 172 [2021-11-07 08:26:05,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:05,806 INFO L225 Difference]: With dead ends: 864 [2021-11-07 08:26:05,807 INFO L226 Difference]: Without dead ends: 468 [2021-11-07 08:26:05,813 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 08:26:05,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-11-07 08:26:05,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2021-11-07 08:26:05,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6269315673289184) internal successors, (737), 453 states have internal predecessors, (737), 0 states have call successors, (0), 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 08:26:05,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 737 transitions. [2021-11-07 08:26:05,900 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 737 transitions. Word has length 172 [2021-11-07 08:26:05,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:05,902 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 737 transitions. [2021-11-07 08:26:05,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 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 08:26:05,903 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 737 transitions. [2021-11-07 08:26:05,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-07 08:26:05,910 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:05,910 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 08:26:05,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:26:05,911 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:05,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:05,912 INFO L85 PathProgramCache]: Analyzing trace with hash -612505342, now seen corresponding path program 1 times [2021-11-07 08:26:05,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:05,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793639290] [2021-11-07 08:26:05,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:05,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:05,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:06,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:06,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793639290] [2021-11-07 08:26:06,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793639290] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:06,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:06,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:26:06,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231849938] [2021-11-07 08:26:06,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:26:06,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:06,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:26:06,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:06,104 INFO L87 Difference]: Start difference. First operand 454 states and 737 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 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 08:26:07,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:07,301 INFO L93 Difference]: Finished difference Result 1330 states and 2169 transitions. [2021-11-07 08:26:07,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:07,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 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 177 [2021-11-07 08:26:07,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:07,309 INFO L225 Difference]: With dead ends: 1330 [2021-11-07 08:26:07,310 INFO L226 Difference]: Without dead ends: 878 [2021-11-07 08:26:07,318 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 08:26:07,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-11-07 08:26:07,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 874. [2021-11-07 08:26:07,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 1.52233676975945) internal successors, (1329), 873 states have internal predecessors, (1329), 0 states have call successors, (0), 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 08:26:07,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1329 transitions. [2021-11-07 08:26:07,426 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1329 transitions. Word has length 177 [2021-11-07 08:26:07,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:07,426 INFO L470 AbstractCegarLoop]: Abstraction has 874 states and 1329 transitions. [2021-11-07 08:26:07,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 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 08:26:07,427 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1329 transitions. [2021-11-07 08:26:07,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-07 08:26:07,436 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:07,437 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:07,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:26:07,438 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:07,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:07,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1500805969, now seen corresponding path program 1 times [2021-11-07 08:26:07,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:07,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565251781] [2021-11-07 08:26:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:07,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:07,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:07,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565251781] [2021-11-07 08:26:07,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565251781] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:07,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:07,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:26:07,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790541053] [2021-11-07 08:26:07,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:26:07,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:07,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:26:07,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:07,565 INFO L87 Difference]: Start difference. First operand 874 states and 1329 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 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 08:26:08,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:08,707 INFO L93 Difference]: Finished difference Result 2575 states and 3935 transitions. [2021-11-07 08:26:08,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:08,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 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 180 [2021-11-07 08:26:08,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:08,720 INFO L225 Difference]: With dead ends: 2575 [2021-11-07 08:26:08,721 INFO L226 Difference]: Without dead ends: 1703 [2021-11-07 08:26:08,723 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 08:26:08,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-11-07 08:26:08,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1687. [2021-11-07 08:26:08,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 1.4994068801897984) internal successors, (2528), 1686 states have internal predecessors, (2528), 0 states have call successors, (0), 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 08:26:08,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 2528 transitions. [2021-11-07 08:26:08,790 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 2528 transitions. Word has length 180 [2021-11-07 08:26:08,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:08,793 INFO L470 AbstractCegarLoop]: Abstraction has 1687 states and 2528 transitions. [2021-11-07 08:26:08,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 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 08:26:08,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 2528 transitions. [2021-11-07 08:26:08,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-07 08:26:08,801 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:08,802 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 08:26:08,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:26:08,803 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:08,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:08,804 INFO L85 PathProgramCache]: Analyzing trace with hash -2063767796, now seen corresponding path program 1 times [2021-11-07 08:26:08,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:08,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375837117] [2021-11-07 08:26:08,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:08,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:08,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:08,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375837117] [2021-11-07 08:26:08,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375837117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:08,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:08,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:26:08,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760003631] [2021-11-07 08:26:08,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:26:08,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:08,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:26:08,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:08,991 INFO L87 Difference]: Start difference. First operand 1687 states and 2528 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 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 08:26:10,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:10,223 INFO L93 Difference]: Finished difference Result 4194 states and 6266 transitions. [2021-11-07 08:26:10,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:10,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2021-11-07 08:26:10,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:10,243 INFO L225 Difference]: With dead ends: 4194 [2021-11-07 08:26:10,244 INFO L226 Difference]: Without dead ends: 2509 [2021-11-07 08:26:10,249 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 08:26:10,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-11-07 08:26:10,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 2508. [2021-11-07 08:26:10,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2507 states have (on average 1.4670921420023932) internal successors, (3678), 2507 states have internal predecessors, (3678), 0 states have call successors, (0), 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 08:26:10,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 3678 transitions. [2021-11-07 08:26:10,356 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 3678 transitions. Word has length 182 [2021-11-07 08:26:10,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:10,357 INFO L470 AbstractCegarLoop]: Abstraction has 2508 states and 3678 transitions. [2021-11-07 08:26:10,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 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 08:26:10,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 3678 transitions. [2021-11-07 08:26:10,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-07 08:26:10,366 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:10,367 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:10,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:26:10,368 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:10,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:10,370 INFO L85 PathProgramCache]: Analyzing trace with hash 158556796, now seen corresponding path program 1 times [2021-11-07 08:26:10,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:10,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817919495] [2021-11-07 08:26:10,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:10,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:26:10,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:10,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817919495] [2021-11-07 08:26:10,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817919495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:10,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:10,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:26:10,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449045699] [2021-11-07 08:26:10,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:26:10,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:10,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:26:10,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:10,699 INFO L87 Difference]: Start difference. First operand 2508 states and 3678 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 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 08:26:11,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:11,849 INFO L93 Difference]: Finished difference Result 5011 states and 7350 transitions. [2021-11-07 08:26:11,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:11,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-11-07 08:26:11,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:11,870 INFO L225 Difference]: With dead ends: 5011 [2021-11-07 08:26:11,870 INFO L226 Difference]: Without dead ends: 2505 [2021-11-07 08:26:11,874 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 08:26:11,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2021-11-07 08:26:11,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2096. [2021-11-07 08:26:11,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 1.3761336515513127) internal successors, (2883), 2095 states have internal predecessors, (2883), 0 states have call successors, (0), 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 08:26:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 2883 transitions. [2021-11-07 08:26:11,956 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 2883 transitions. Word has length 187 [2021-11-07 08:26:11,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:11,958 INFO L470 AbstractCegarLoop]: Abstraction has 2096 states and 2883 transitions. [2021-11-07 08:26:11,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 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 08:26:11,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 2883 transitions. [2021-11-07 08:26:11,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-07 08:26:11,966 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:11,966 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:11,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:26:11,967 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:11,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:11,968 INFO L85 PathProgramCache]: Analyzing trace with hash 819933047, now seen corresponding path program 1 times [2021-11-07 08:26:11,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:11,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231713172] [2021-11-07 08:26:11,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:11,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:26:12,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:12,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231713172] [2021-11-07 08:26:12,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231713172] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:12,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:12,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:26:12,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702079549] [2021-11-07 08:26:12,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:26:12,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:12,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:26:12,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:12,091 INFO L87 Difference]: Start difference. First operand 2096 states and 2883 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 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 08:26:13,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:13,333 INFO L93 Difference]: Finished difference Result 6221 states and 8562 transitions. [2021-11-07 08:26:13,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:13,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 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 189 [2021-11-07 08:26:13,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:13,369 INFO L225 Difference]: With dead ends: 6221 [2021-11-07 08:26:13,369 INFO L226 Difference]: Without dead ends: 4127 [2021-11-07 08:26:13,373 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 08:26:13,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4127 states. [2021-11-07 08:26:13,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4127 to 3517. [2021-11-07 08:26:13,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3517 states, 3516 states have (on average 1.2622298065984072) internal successors, (4438), 3516 states have internal predecessors, (4438), 0 states have call successors, (0), 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 08:26:13,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3517 states to 3517 states and 4438 transitions. [2021-11-07 08:26:13,490 INFO L78 Accepts]: Start accepts. Automaton has 3517 states and 4438 transitions. Word has length 189 [2021-11-07 08:26:13,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:13,491 INFO L470 AbstractCegarLoop]: Abstraction has 3517 states and 4438 transitions. [2021-11-07 08:26:13,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 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 08:26:13,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3517 states and 4438 transitions. [2021-11-07 08:26:13,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-07 08:26:13,499 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:13,500 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:13,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:26:13,500 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:13,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:13,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1508504081, now seen corresponding path program 1 times [2021-11-07 08:26:13,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:13,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881283074] [2021-11-07 08:26:13,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:13,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 26 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 08:26:13,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:13,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881283074] [2021-11-07 08:26:13,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881283074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:13,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799030910] [2021-11-07 08:26:13,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:13,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:13,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:13,666 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:26:13,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:26:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:13,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:26:13,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:26:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 08:26:14,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799030910] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:14,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:26:14,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-07 08:26:14,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370418068] [2021-11-07 08:26:14,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:26:14,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:14,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:26:14,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:26:14,908 INFO L87 Difference]: Start difference. First operand 3517 states and 4438 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:16,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:16,148 INFO L93 Difference]: Finished difference Result 10502 states and 13253 transitions. [2021-11-07 08:26:16,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:16,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2021-11-07 08:26:16,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:16,199 INFO L225 Difference]: With dead ends: 10502 [2021-11-07 08:26:16,199 INFO L226 Difference]: Without dead ends: 6987 [2021-11-07 08:26:16,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:26:16,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6987 states. [2021-11-07 08:26:16,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6987 to 6986. [2021-11-07 08:26:16,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6986 states, 6985 states have (on average 1.2284896206156048) internal successors, (8581), 6985 states have internal predecessors, (8581), 0 states have call successors, (0), 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 08:26:16,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6986 states to 6986 states and 8581 transitions. [2021-11-07 08:26:16,417 INFO L78 Accepts]: Start accepts. Automaton has 6986 states and 8581 transitions. Word has length 199 [2021-11-07 08:26:16,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:16,417 INFO L470 AbstractCegarLoop]: Abstraction has 6986 states and 8581 transitions. [2021-11-07 08:26:16,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:16,418 INFO L276 IsEmpty]: Start isEmpty. Operand 6986 states and 8581 transitions. [2021-11-07 08:26:16,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-07 08:26:16,436 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:16,436 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:26:16,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:26:16,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-07 08:26:16,663 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:16,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:16,664 INFO L85 PathProgramCache]: Analyzing trace with hash -883568588, now seen corresponding path program 1 times [2021-11-07 08:26:16,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:16,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977769837] [2021-11-07 08:26:16,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:16,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 99 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 08:26:16,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:16,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977769837] [2021-11-07 08:26:16,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977769837] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:16,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542718418] [2021-11-07 08:26:16,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:16,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:16,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:16,944 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:26:17,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:26:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:17,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:26:17,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:26:18,400 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 08:26:18,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542718418] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:18,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:26:18,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-07 08:26:18,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333280070] [2021-11-07 08:26:18,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:26:18,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:18,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:26:18,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:26:18,405 INFO L87 Difference]: Start difference. First operand 6986 states and 8581 transitions. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 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 08:26:19,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:19,671 INFO L93 Difference]: Finished difference Result 13990 states and 17199 transitions. [2021-11-07 08:26:19,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:19,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 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 272 [2021-11-07 08:26:19,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:19,718 INFO L225 Difference]: With dead ends: 13990 [2021-11-07 08:26:19,719 INFO L226 Difference]: Without dead ends: 7006 [2021-11-07 08:26:19,729 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:26:19,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7006 states. [2021-11-07 08:26:19,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7006 to 6986. [2021-11-07 08:26:19,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6986 states, 6985 states have (on average 1.214602720114531) internal successors, (8484), 6985 states have internal predecessors, (8484), 0 states have call successors, (0), 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 08:26:19,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6986 states to 6986 states and 8484 transitions. [2021-11-07 08:26:19,984 INFO L78 Accepts]: Start accepts. Automaton has 6986 states and 8484 transitions. Word has length 272 [2021-11-07 08:26:19,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:19,985 INFO L470 AbstractCegarLoop]: Abstraction has 6986 states and 8484 transitions. [2021-11-07 08:26:19,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 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 08:26:19,986 INFO L276 IsEmpty]: Start isEmpty. Operand 6986 states and 8484 transitions. [2021-11-07 08:26:20,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-07 08:26:20,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:20,009 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:20,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:26:20,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:20,223 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:20,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:20,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1435386261, now seen corresponding path program 1 times [2021-11-07 08:26:20,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:20,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269211914] [2021-11-07 08:26:20,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:20,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:20,437 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:20,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:20,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269211914] [2021-11-07 08:26:20,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269211914] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:20,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:20,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:26:20,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140147998] [2021-11-07 08:26:20,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:26:20,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:20,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:26:20,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:26:20,447 INFO L87 Difference]: Start difference. First operand 6986 states and 8484 transitions. Second operand has 4 states, 4 states have (on average 68.5) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:22,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:22,167 INFO L93 Difference]: Finished difference Result 16642 states and 20264 transitions. [2021-11-07 08:26:22,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:26:22,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.5) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 274 [2021-11-07 08:26:22,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:22,213 INFO L225 Difference]: With dead ends: 16642 [2021-11-07 08:26:22,214 INFO L226 Difference]: Without dead ends: 9658 [2021-11-07 08:26:22,224 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 08:26:22,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9658 states. [2021-11-07 08:26:22,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9658 to 9641. [2021-11-07 08:26:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9641 states, 9640 states have (on average 1.1924273858921162) internal successors, (11495), 9640 states have internal predecessors, (11495), 0 states have call successors, (0), 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 08:26:22,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9641 states to 9641 states and 11495 transitions. [2021-11-07 08:26:22,553 INFO L78 Accepts]: Start accepts. Automaton has 9641 states and 11495 transitions. Word has length 274 [2021-11-07 08:26:22,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:22,554 INFO L470 AbstractCegarLoop]: Abstraction has 9641 states and 11495 transitions. [2021-11-07 08:26:22,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.5) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:22,556 INFO L276 IsEmpty]: Start isEmpty. Operand 9641 states and 11495 transitions. [2021-11-07 08:26:22,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-11-07 08:26:22,579 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:22,580 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:26:22,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:26:22,581 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:22,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:22,582 INFO L85 PathProgramCache]: Analyzing trace with hash -342102265, now seen corresponding path program 1 times [2021-11-07 08:26:22,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:22,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823852205] [2021-11-07 08:26:22,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:22,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:22,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:22,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823852205] [2021-11-07 08:26:22,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823852205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:22,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:22,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:26:22,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078658178] [2021-11-07 08:26:22,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:26:22,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:22,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:26:22,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:22,792 INFO L87 Difference]: Start difference. First operand 9641 states and 11495 transitions. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:23,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:23,898 INFO L93 Difference]: Finished difference Result 19062 states and 22746 transitions. [2021-11-07 08:26:23,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:23,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 301 [2021-11-07 08:26:23,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:23,930 INFO L225 Difference]: With dead ends: 19062 [2021-11-07 08:26:23,930 INFO L226 Difference]: Without dead ends: 9423 [2021-11-07 08:26:23,944 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 08:26:23,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9423 states. [2021-11-07 08:26:24,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9423 to 9422. [2021-11-07 08:26:24,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9422 states, 9421 states have (on average 1.147542723702367) internal successors, (10811), 9421 states have internal predecessors, (10811), 0 states have call successors, (0), 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 08:26:24,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9422 states to 9422 states and 10811 transitions. [2021-11-07 08:26:24,150 INFO L78 Accepts]: Start accepts. Automaton has 9422 states and 10811 transitions. Word has length 301 [2021-11-07 08:26:24,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:24,151 INFO L470 AbstractCegarLoop]: Abstraction has 9422 states and 10811 transitions. [2021-11-07 08:26:24,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:24,152 INFO L276 IsEmpty]: Start isEmpty. Operand 9422 states and 10811 transitions. [2021-11-07 08:26:24,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-11-07 08:26:24,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:24,176 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:24,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:26:24,177 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:24,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:24,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1321727266, now seen corresponding path program 1 times [2021-11-07 08:26:24,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:24,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348465064] [2021-11-07 08:26:24,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:24,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:26:24,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:24,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348465064] [2021-11-07 08:26:24,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348465064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:24,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:24,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:26:24,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934830182] [2021-11-07 08:26:24,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:26:24,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:24,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:26:24,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:24,511 INFO L87 Difference]: Start difference. First operand 9422 states and 10811 transitions. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 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 08:26:25,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:25,508 INFO L93 Difference]: Finished difference Result 23514 states and 27209 transitions. [2021-11-07 08:26:25,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:25,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 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 302 [2021-11-07 08:26:25,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:25,543 INFO L225 Difference]: With dead ends: 23514 [2021-11-07 08:26:25,543 INFO L226 Difference]: Without dead ends: 14094 [2021-11-07 08:26:25,556 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 08:26:25,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14094 states. [2021-11-07 08:26:25,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14094 to 13076. [2021-11-07 08:26:25,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13076 states, 13075 states have (on average 1.1576290630975143) internal successors, (15136), 13075 states have internal predecessors, (15136), 0 states have call successors, (0), 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 08:26:25,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13076 states to 13076 states and 15136 transitions. [2021-11-07 08:26:25,937 INFO L78 Accepts]: Start accepts. Automaton has 13076 states and 15136 transitions. Word has length 302 [2021-11-07 08:26:25,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:25,938 INFO L470 AbstractCegarLoop]: Abstraction has 13076 states and 15136 transitions. [2021-11-07 08:26:25,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 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 08:26:25,938 INFO L276 IsEmpty]: Start isEmpty. Operand 13076 states and 15136 transitions. [2021-11-07 08:26:25,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-11-07 08:26:25,969 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:25,970 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:26:25,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 08:26:25,971 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:25,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:25,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1335262643, now seen corresponding path program 1 times [2021-11-07 08:26:25,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:25,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621873620] [2021-11-07 08:26:25,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:25,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-07 08:26:26,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:26,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621873620] [2021-11-07 08:26:26,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621873620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:26,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73116895] [2021-11-07 08:26:26,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:26,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:26,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:26,155 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:26:26,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:26:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:26,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:26:26,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:26:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-07 08:26:27,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73116895] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:27,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:26:27,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-07 08:26:27,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126605024] [2021-11-07 08:26:27,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:26:27,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:27,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:26:27,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:26:27,802 INFO L87 Difference]: Start difference. First operand 13076 states and 15136 transitions. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:28,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:28,952 INFO L93 Difference]: Finished difference Result 33289 states and 38627 transitions. [2021-11-07 08:26:28,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:28,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 318 [2021-11-07 08:26:28,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:29,006 INFO L225 Difference]: With dead ends: 33289 [2021-11-07 08:26:29,007 INFO L226 Difference]: Without dead ends: 20215 [2021-11-07 08:26:29,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:26:29,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20215 states. [2021-11-07 08:26:29,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20215 to 18782. [2021-11-07 08:26:29,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18782 states, 18781 states have (on average 1.146797295138704) internal successors, (21538), 18781 states have internal predecessors, (21538), 0 states have call successors, (0), 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 08:26:29,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18782 states to 18782 states and 21538 transitions. [2021-11-07 08:26:29,456 INFO L78 Accepts]: Start accepts. Automaton has 18782 states and 21538 transitions. Word has length 318 [2021-11-07 08:26:29,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:29,457 INFO L470 AbstractCegarLoop]: Abstraction has 18782 states and 21538 transitions. [2021-11-07 08:26:29,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:29,457 INFO L276 IsEmpty]: Start isEmpty. Operand 18782 states and 21538 transitions. [2021-11-07 08:26:29,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-11-07 08:26:29,494 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:29,494 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:26:29,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:26:29,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:29,719 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:29,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:29,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1742213714, now seen corresponding path program 1 times [2021-11-07 08:26:29,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:29,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500175263] [2021-11-07 08:26:29,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:29,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 08:26:30,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:30,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500175263] [2021-11-07 08:26:30,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500175263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:30,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:30,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:26:30,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344093238] [2021-11-07 08:26:30,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:26:30,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:30,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:26:30,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:30,103 INFO L87 Difference]: Start difference. First operand 18782 states and 21538 transitions. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 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 08:26:31,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:31,272 INFO L93 Difference]: Finished difference Result 44281 states and 50699 transitions. [2021-11-07 08:26:31,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:31,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 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 326 [2021-11-07 08:26:31,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:31,320 INFO L225 Difference]: With dead ends: 44281 [2021-11-07 08:26:31,320 INFO L226 Difference]: Without dead ends: 25501 [2021-11-07 08:26:31,341 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 08:26:31,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25501 states. [2021-11-07 08:26:31,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25501 to 24888. [2021-11-07 08:26:31,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24888 states, 24887 states have (on average 1.1456985574798086) internal successors, (28513), 24887 states have internal predecessors, (28513), 0 states have call successors, (0), 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 08:26:31,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24888 states to 24888 states and 28513 transitions. [2021-11-07 08:26:31,925 INFO L78 Accepts]: Start accepts. Automaton has 24888 states and 28513 transitions. Word has length 326 [2021-11-07 08:26:31,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:31,926 INFO L470 AbstractCegarLoop]: Abstraction has 24888 states and 28513 transitions. [2021-11-07 08:26:31,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 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 08:26:31,926 INFO L276 IsEmpty]: Start isEmpty. Operand 24888 states and 28513 transitions. [2021-11-07 08:26:31,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-11-07 08:26:31,957 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:31,958 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:26:31,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:26:31,959 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:31,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:31,959 INFO L85 PathProgramCache]: Analyzing trace with hash 919982632, now seen corresponding path program 1 times [2021-11-07 08:26:31,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:31,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646355084] [2021-11-07 08:26:31,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:31,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 08:26:32,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:32,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646355084] [2021-11-07 08:26:32,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646355084] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:32,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:32,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:26:32,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092862601] [2021-11-07 08:26:32,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:26:32,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:32,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:26:32,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:32,460 INFO L87 Difference]: Start difference. First operand 24888 states and 28513 transitions. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 2 states have internal predecessors, (316), 0 states have call successors, (0), 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 08:26:33,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:33,246 INFO L93 Difference]: Finished difference Result 48507 states and 55556 transitions. [2021-11-07 08:26:33,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:33,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 2 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-11-07 08:26:33,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:33,290 INFO L225 Difference]: With dead ends: 48507 [2021-11-07 08:26:33,290 INFO L226 Difference]: Without dead ends: 23621 [2021-11-07 08:26:33,304 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 08:26:33,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23621 states. [2021-11-07 08:26:33,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23621 to 23418. [2021-11-07 08:26:33,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23418 states, 23417 states have (on average 1.1389161720117864) internal successors, (26670), 23417 states have internal predecessors, (26670), 0 states have call successors, (0), 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 08:26:33,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23418 states to 23418 states and 26670 transitions. [2021-11-07 08:26:33,820 INFO L78 Accepts]: Start accepts. Automaton has 23418 states and 26670 transitions. Word has length 356 [2021-11-07 08:26:33,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:33,821 INFO L470 AbstractCegarLoop]: Abstraction has 23418 states and 26670 transitions. [2021-11-07 08:26:33,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 2 states have internal predecessors, (316), 0 states have call successors, (0), 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 08:26:33,822 INFO L276 IsEmpty]: Start isEmpty. Operand 23418 states and 26670 transitions. [2021-11-07 08:26:33,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-11-07 08:26:33,961 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:33,961 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:26:33,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 08:26:33,962 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:33,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:33,962 INFO L85 PathProgramCache]: Analyzing trace with hash -206158405, now seen corresponding path program 1 times [2021-11-07 08:26:33,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:33,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691861627] [2021-11-07 08:26:33,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:33,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 234 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:34,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:34,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691861627] [2021-11-07 08:26:34,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691861627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:34,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997801128] [2021-11-07 08:26:34,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:34,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:34,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:34,385 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:26:34,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:26:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:34,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:26:34,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:26:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-07 08:26:38,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997801128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:38,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:26:38,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-07 08:26:38,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313824912] [2021-11-07 08:26:38,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:26:38,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:38,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:26:38,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:26:38,341 INFO L87 Difference]: Start difference. First operand 23418 states and 26670 transitions. Second operand has 4 states, 4 states have (on average 75.75) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 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 08:26:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:39,785 INFO L93 Difference]: Finished difference Result 73717 states and 83779 transitions. [2021-11-07 08:26:39,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:26:39,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.75) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 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 358 [2021-11-07 08:26:39,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:39,865 INFO L225 Difference]: With dead ends: 73717 [2021-11-07 08:26:39,866 INFO L226 Difference]: Without dead ends: 50301 [2021-11-07 08:26:39,883 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:26:39,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50301 states. [2021-11-07 08:26:40,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50301 to 47858. [2021-11-07 08:26:40,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47858 states, 47857 states have (on average 1.1364481685019956) internal successors, (54387), 47857 states have internal predecessors, (54387), 0 states have call successors, (0), 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 08:26:41,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47858 states to 47858 states and 54387 transitions. [2021-11-07 08:26:41,086 INFO L78 Accepts]: Start accepts. Automaton has 47858 states and 54387 transitions. Word has length 358 [2021-11-07 08:26:41,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:41,088 INFO L470 AbstractCegarLoop]: Abstraction has 47858 states and 54387 transitions. [2021-11-07 08:26:41,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.75) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 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 08:26:41,089 INFO L276 IsEmpty]: Start isEmpty. Operand 47858 states and 54387 transitions. [2021-11-07 08:26:41,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-11-07 08:26:41,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:41,127 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:26:41,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:26:41,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 08:26:41,331 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:41,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:41,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1769717100, now seen corresponding path program 1 times [2021-11-07 08:26:41,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:41,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141043839] [2021-11-07 08:26:41,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:41,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:41,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 172 proven. 6 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2021-11-07 08:26:41,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:41,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141043839] [2021-11-07 08:26:41,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141043839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:41,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909390430] [2021-11-07 08:26:41,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:41,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:41,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:41,571 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:26:41,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:26:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:42,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:26:42,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:26:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 248 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-11-07 08:26:43,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909390430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:43,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:26:43,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-07 08:26:43,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764335995] [2021-11-07 08:26:43,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:26:43,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:43,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:26:43,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:26:43,313 INFO L87 Difference]: Start difference. First operand 47858 states and 54387 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:44,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:44,502 INFO L93 Difference]: Finished difference Result 106885 states and 121093 transitions. [2021-11-07 08:26:44,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:44,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 362 [2021-11-07 08:26:44,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:44,579 INFO L225 Difference]: With dead ends: 106885 [2021-11-07 08:26:44,579 INFO L226 Difference]: Without dead ends: 59029 [2021-11-07 08:26:44,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:26:44,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59029 states. [2021-11-07 08:26:45,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59029 to 53335. [2021-11-07 08:26:45,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53335 states, 53334 states have (on average 1.1049049386882663) internal successors, (58929), 53334 states have internal predecessors, (58929), 0 states have call successors, (0), 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 08:26:45,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53335 states to 53335 states and 58929 transitions. [2021-11-07 08:26:45,880 INFO L78 Accepts]: Start accepts. Automaton has 53335 states and 58929 transitions. Word has length 362 [2021-11-07 08:26:45,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:45,880 INFO L470 AbstractCegarLoop]: Abstraction has 53335 states and 58929 transitions. [2021-11-07 08:26:45,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:45,881 INFO L276 IsEmpty]: Start isEmpty. Operand 53335 states and 58929 transitions. [2021-11-07 08:26:46,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2021-11-07 08:26:46,154 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:46,155 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:46,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:26:46,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 08:26:46,375 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:46,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:46,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1321210920, now seen corresponding path program 1 times [2021-11-07 08:26:46,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:46,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013540853] [2021-11-07 08:26:46,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:46,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 234 proven. 6 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-07 08:26:46,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:46,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013540853] [2021-11-07 08:26:46,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013540853] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:46,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149677066] [2021-11-07 08:26:46,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:46,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:46,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:46,606 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:26:46,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:26:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:47,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:26:47,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:26:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-07 08:26:48,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149677066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:48,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:26:48,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-07 08:26:48,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471142274] [2021-11-07 08:26:48,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:26:48,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:48,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:26:48,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:26:48,788 INFO L87 Difference]: Start difference. First operand 53335 states and 58929 transitions. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 2 states have internal predecessors, (299), 0 states have call successors, (0), 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 08:26:49,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:49,800 INFO L93 Difference]: Finished difference Result 158372 states and 175041 transitions. [2021-11-07 08:26:49,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:49,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 2 states have internal predecessors, (299), 0 states have call successors, (0), 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 397 [2021-11-07 08:26:49,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:49,935 INFO L225 Difference]: With dead ends: 158372 [2021-11-07 08:26:49,935 INFO L226 Difference]: Without dead ends: 105039 [2021-11-07 08:26:49,976 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:26:50,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105039 states. [2021-11-07 08:26:51,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105039 to 105032. [2021-11-07 08:26:51,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105032 states, 105031 states have (on average 1.1053117650979234) internal successors, (116092), 105031 states have internal predecessors, (116092), 0 states have call successors, (0), 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 08:26:52,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105032 states to 105032 states and 116092 transitions. [2021-11-07 08:26:52,081 INFO L78 Accepts]: Start accepts. Automaton has 105032 states and 116092 transitions. Word has length 397 [2021-11-07 08:26:52,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:52,082 INFO L470 AbstractCegarLoop]: Abstraction has 105032 states and 116092 transitions. [2021-11-07 08:26:52,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 2 states have internal predecessors, (299), 0 states have call successors, (0), 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 08:26:52,082 INFO L276 IsEmpty]: Start isEmpty. Operand 105032 states and 116092 transitions. [2021-11-07 08:26:52,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2021-11-07 08:26:52,110 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:52,111 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:26:52,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:26:52,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 08:26:52,315 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:52,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:52,316 INFO L85 PathProgramCache]: Analyzing trace with hash 2102951711, now seen corresponding path program 1 times [2021-11-07 08:26:52,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:52,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2908234] [2021-11-07 08:26:52,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:52,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 338 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-07 08:26:52,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:52,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2908234] [2021-11-07 08:26:52,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2908234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:52,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:52,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:26:52,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230873096] [2021-11-07 08:26:52,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:26:52,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:52,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:26:52,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:52,572 INFO L87 Difference]: Start difference. First operand 105032 states and 116092 transitions. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 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 08:26:54,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:54,328 INFO L93 Difference]: Finished difference Result 217378 states and 239824 transitions. [2021-11-07 08:26:54,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:54,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 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 403 [2021-11-07 08:26:54,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:54,475 INFO L225 Difference]: With dead ends: 217378 [2021-11-07 08:26:54,475 INFO L226 Difference]: Without dead ends: 112348 [2021-11-07 08:26:54,520 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 08:26:55,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112348 states. [2021-11-07 08:26:56,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112348 to 112340. [2021-11-07 08:26:56,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112340 states, 112339 states have (on average 1.0994044810795895) internal successors, (123506), 112339 states have internal predecessors, (123506), 0 states have call successors, (0), 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 08:26:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112340 states to 112340 states and 123506 transitions. [2021-11-07 08:26:57,475 INFO L78 Accepts]: Start accepts. Automaton has 112340 states and 123506 transitions. Word has length 403 [2021-11-07 08:26:57,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:57,475 INFO L470 AbstractCegarLoop]: Abstraction has 112340 states and 123506 transitions. [2021-11-07 08:26:57,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 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 08:26:57,476 INFO L276 IsEmpty]: Start isEmpty. Operand 112340 states and 123506 transitions. [2021-11-07 08:26:57,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-11-07 08:26:57,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:57,503 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:26:57,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 08:26:57,504 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:57,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:57,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1895650254, now seen corresponding path program 1 times [2021-11-07 08:26:57,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:57,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279052583] [2021-11-07 08:26:57,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:57,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 384 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 08:26:57,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:57,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279052583] [2021-11-07 08:26:57,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279052583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:26:57,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099236284] [2021-11-07 08:26:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:57,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:26:57,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:57,788 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:26:57,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:26:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:58,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:26:58,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:27:00,149 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 30 proven. 221 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-11-07 08:27:00,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099236284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:00,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:27:00,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-11-07 08:27:00,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843171820] [2021-11-07 08:27:00,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:27:00,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:00,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:27:00,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:27:00,154 INFO L87 Difference]: Start difference. First operand 112340 states and 123506 transitions. Second operand has 7 states, 7 states have (on average 97.42857142857143) internal successors, (682), 7 states have internal predecessors, (682), 0 states have call successors, (0), 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 08:27:07,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:07,555 INFO L93 Difference]: Finished difference Result 299886 states and 326463 transitions. [2021-11-07 08:27:07,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 08:27:07,556 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 97.42857142857143) internal successors, (682), 7 states have internal predecessors, (682), 0 states have call successors, (0), 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 404 [2021-11-07 08:27:07,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:07,779 INFO L225 Difference]: With dead ends: 299886 [2021-11-07 08:27:07,779 INFO L226 Difference]: Without dead ends: 187548 [2021-11-07 08:27:07,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2021-11-07 08:27:07,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187548 states. [2021-11-07 08:27:11,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187548 to 133705. [2021-11-07 08:27:11,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133705 states, 133704 states have (on average 1.0847169867767605) internal successors, (145031), 133704 states have internal predecessors, (145031), 0 states have call successors, (0), 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 08:27:11,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133705 states to 133705 states and 145031 transitions. [2021-11-07 08:27:11,553 INFO L78 Accepts]: Start accepts. Automaton has 133705 states and 145031 transitions. Word has length 404 [2021-11-07 08:27:11,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:11,554 INFO L470 AbstractCegarLoop]: Abstraction has 133705 states and 145031 transitions. [2021-11-07 08:27:11,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 97.42857142857143) internal successors, (682), 7 states have internal predecessors, (682), 0 states have call successors, (0), 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 08:27:11,554 INFO L276 IsEmpty]: Start isEmpty. Operand 133705 states and 145031 transitions. [2021-11-07 08:27:11,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2021-11-07 08:27:11,581 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:11,581 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 08:27:11,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:27:11,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:11,795 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:11,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:11,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2031481651, now seen corresponding path program 1 times [2021-11-07 08:27:11,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:11,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123850628] [2021-11-07 08:27:11,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:11,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:11,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 244 proven. 9 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-07 08:27:12,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:12,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123850628] [2021-11-07 08:27:12,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123850628] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:12,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420457089] [2021-11-07 08:27:12,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:12,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:12,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:27:12,033 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:27:12,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:27:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:13,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:27:13,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:27:14,086 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-07 08:27:14,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420457089] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:27:14,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:27:14,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-07 08:27:14,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126502013] [2021-11-07 08:27:14,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:27:14,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:14,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:27:14,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:27:14,091 INFO L87 Difference]: Start difference. First operand 133705 states and 145031 transitions. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 08:27:16,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:16,010 INFO L93 Difference]: Finished difference Result 269042 states and 291678 transitions. [2021-11-07 08:27:16,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:27:16,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 405 [2021-11-07 08:27:16,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:16,189 INFO L225 Difference]: With dead ends: 269042 [2021-11-07 08:27:16,189 INFO L226 Difference]: Without dead ends: 135339 [2021-11-07 08:27:16,246 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:27:16,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135339 states. [2021-11-07 08:27:18,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135339 to 135301. [2021-11-07 08:27:18,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135301 states, 135300 states have (on average 1.0813821138211381) internal successors, (146311), 135300 states have internal predecessors, (146311), 0 states have call successors, (0), 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 08:27:19,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135301 states to 135301 states and 146311 transitions. [2021-11-07 08:27:19,093 INFO L78 Accepts]: Start accepts. Automaton has 135301 states and 146311 transitions. Word has length 405 [2021-11-07 08:27:19,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:19,094 INFO L470 AbstractCegarLoop]: Abstraction has 135301 states and 146311 transitions. [2021-11-07 08:27:19,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 08:27:19,094 INFO L276 IsEmpty]: Start isEmpty. Operand 135301 states and 146311 transitions. [2021-11-07 08:27:19,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2021-11-07 08:27:19,129 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:19,130 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:27:19,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-07 08:27:19,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:19,332 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:19,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:19,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1580236616, now seen corresponding path program 1 times [2021-11-07 08:27:19,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:19,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866512590] [2021-11-07 08:27:19,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:19,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-07 08:27:19,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:19,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866512590] [2021-11-07 08:27:19,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866512590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:27:19,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:27:19,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:27:19,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478950359] [2021-11-07 08:27:19,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:27:19,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:19,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:27:19,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:27:19,575 INFO L87 Difference]: Start difference. First operand 135301 states and 146311 transitions. Second operand has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:22,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:22,250 INFO L93 Difference]: Finished difference Result 352384 states and 380454 transitions. [2021-11-07 08:27:22,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:27:22,250 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 418 [2021-11-07 08:27:22,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:22,548 INFO L225 Difference]: With dead ends: 352384 [2021-11-07 08:27:22,549 INFO L226 Difference]: Without dead ends: 217085 [2021-11-07 08:27:22,623 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 08:27:23,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217085 states. [2021-11-07 08:27:26,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217085 to 217079. [2021-11-07 08:27:26,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217079 states, 217078 states have (on average 1.0783681441693769) internal successors, (234090), 217078 states have internal predecessors, (234090), 0 states have call successors, (0), 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 08:27:27,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217079 states to 217079 states and 234090 transitions. [2021-11-07 08:27:27,035 INFO L78 Accepts]: Start accepts. Automaton has 217079 states and 234090 transitions. Word has length 418 [2021-11-07 08:27:27,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:27,036 INFO L470 AbstractCegarLoop]: Abstraction has 217079 states and 234090 transitions. [2021-11-07 08:27:27,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:27,036 INFO L276 IsEmpty]: Start isEmpty. Operand 217079 states and 234090 transitions. [2021-11-07 08:27:27,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-11-07 08:27:27,068 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:27,069 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 08:27:27,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 08:27:27,069 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:27,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:27,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1749582884, now seen corresponding path program 1 times [2021-11-07 08:27:27,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:27,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574698418] [2021-11-07 08:27:27,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:27,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:28,290 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 408 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:27:28,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:28,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574698418] [2021-11-07 08:27:28,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574698418] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:28,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083717036] [2021-11-07 08:27:28,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:28,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:28,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:27:28,292 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:27:28,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06fda7b-805d-4344-b7d0-a3a56226b6ad/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:27:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:29,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:27:29,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:27:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:27:30,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083717036] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:27:30,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:27:30,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-11-07 08:27:30,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314779153] [2021-11-07 08:27:30,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:27:30,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:30,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:27:30,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:27:30,982 INFO L87 Difference]: Start difference. First operand 217079 states and 234090 transitions. Second operand has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:33,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:33,872 INFO L93 Difference]: Finished difference Result 460838 states and 496718 transitions. [2021-11-07 08:27:33,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:27:33,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 433 [2021-11-07 08:27:33,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:34,187 INFO L225 Difference]: With dead ends: 460838 [2021-11-07 08:27:34,187 INFO L226 Difference]: Without dead ends: 243761 [2021-11-07 08:27:34,266 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:27:34,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243761 states.