./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem11_label25.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem11_label25.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1a498dbc067f1de398639e507498752ad05d79db17a274a9c2dbfecc9e6d20a0 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:57:26,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:57:26,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:57:26,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:57:26,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:57:26,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:57:26,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:57:26,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:57:26,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:57:26,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:57:26,997 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:57:26,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:57:26,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:57:27,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:57:27,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:57:27,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:57:27,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:57:27,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:57:27,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:57:27,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:57:27,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:57:27,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:57:27,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:57:27,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:57:27,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:57:27,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:57:27,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:57:27,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:57:27,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:57:27,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:57:27,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:57:27,019 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:57:27,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:57:27,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:57:27,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:57:27,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:57:27,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:57:27,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:57:27,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:57:27,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:57:27,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:57:27,024 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 23:57:27,041 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:57:27,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:57:27,041 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:57:27,042 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:57:27,042 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:57:27,042 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:57:27,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:57:27,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:57:27,043 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:57:27,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:57:27,043 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:57:27,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:57:27,043 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:57:27,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:57:27,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:57:27,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:57:27,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:57:27,044 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:57:27,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:57:27,044 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:57:27,044 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:57:27,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:57:27,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:57:27,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:57:27,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:57:27,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:57:27,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:57:27,045 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:57:27,045 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:57:27,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:57:27,046 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:57:27,046 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:57:27,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:57:27,046 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:57:27,046 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_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a498dbc067f1de398639e507498752ad05d79db17a274a9c2dbfecc9e6d20a0 [2021-12-06 23:57:27,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:57:27,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:57:27,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:57:27,237 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:57:27,238 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:57:27,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem11_label25.c [2021-12-06 23:57:27,280 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/data/d0f1bda93/4732e6314a5a4adeb7d97195c7148894/FLAGe8bbcda5f [2021-12-06 23:57:27,745 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:57:27,745 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/sv-benchmarks/c/eca-rers2012/Problem11_label25.c [2021-12-06 23:57:27,757 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/data/d0f1bda93/4732e6314a5a4adeb7d97195c7148894/FLAGe8bbcda5f [2021-12-06 23:57:27,768 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/data/d0f1bda93/4732e6314a5a4adeb7d97195c7148894 [2021-12-06 23:57:27,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:57:27,770 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:57:27,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:57:27,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:57:27,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:57:27,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:57:27" (1/1) ... [2021-12-06 23:57:27,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54fbdd48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:27, skipping insertion in model container [2021-12-06 23:57:27,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:57:27" (1/1) ... [2021-12-06 23:57:27,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:57:27,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:57:27,983 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/sv-benchmarks/c/eca-rers2012/Problem11_label25.c[4556,4569] [2021-12-06 23:57:28,183 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:57:28,192 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:57:28,215 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/sv-benchmarks/c/eca-rers2012/Problem11_label25.c[4556,4569] [2021-12-06 23:57:28,322 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:57:28,336 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:57:28,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:28 WrapperNode [2021-12-06 23:57:28,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:57:28,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:57:28,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:57:28,338 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:57:28,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:28" (1/1) ... [2021-12-06 23:57:28,372 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:28" (1/1) ... [2021-12-06 23:57:28,448 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 999 [2021-12-06 23:57:28,449 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:57:28,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:57:28,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:57:28,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:57:28,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:28" (1/1) ... [2021-12-06 23:57:28,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:28" (1/1) ... [2021-12-06 23:57:28,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:28" (1/1) ... [2021-12-06 23:57:28,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:28" (1/1) ... [2021-12-06 23:57:28,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:28" (1/1) ... [2021-12-06 23:57:28,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:28" (1/1) ... [2021-12-06 23:57:28,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:28" (1/1) ... [2021-12-06 23:57:28,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:57:28,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:57:28,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:57:28,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:57:28,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:28" (1/1) ... [2021-12-06 23:57:28,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:57:28,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:57:28,581 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:57:28,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:57:28,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:57:28,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:57:28,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:57:28,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:57:28,661 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:57:28,662 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:57:29,711 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:57:29,721 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:57:29,721 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 23:57:29,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:57:29 BoogieIcfgContainer [2021-12-06 23:57:29,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:57:29,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:57:29,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:57:29,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:57:29,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:57:27" (1/3) ... [2021-12-06 23:57:29,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43fbc39e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:57:29, skipping insertion in model container [2021-12-06 23:57:29,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:28" (2/3) ... [2021-12-06 23:57:29,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43fbc39e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:57:29, skipping insertion in model container [2021-12-06 23:57:29,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:57:29" (3/3) ... [2021-12-06 23:57:29,732 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label25.c [2021-12-06 23:57:29,736 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:57:29,736 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 23:57:29,771 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:57:29,776 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 23:57:29,777 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 23:57:29,793 INFO L276 IsEmpty]: Start isEmpty. Operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:29,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 23:57:29,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:29,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:29,799 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:29,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:29,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1843609039, now seen corresponding path program 1 times [2021-12-06 23:57:29,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:29,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422273833] [2021-12-06 23:57:29,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:29,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:29,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:30,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:30,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422273833] [2021-12-06 23:57:30,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422273833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:30,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:30,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:57:30,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018529440] [2021-12-06 23:57:30,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:30,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:57:30,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:30,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:57:30,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:30,034 INFO L87 Difference]: Start difference. First operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 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 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:30,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:30,816 INFO L93 Difference]: Finished difference Result 761 states and 1345 transitions. [2021-12-06 23:57:30,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:57:30,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-12-06 23:57:30,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:30,829 INFO L225 Difference]: With dead ends: 761 [2021-12-06 23:57:30,829 INFO L226 Difference]: Without dead ends: 413 [2021-12-06 23:57:30,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:30,834 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 197 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:30,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 222 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 23:57:30,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-12-06 23:57:30,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 413. [2021-12-06 23:57:30,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.453883495145631) internal successors, (599), 412 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:30,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 599 transitions. [2021-12-06 23:57:30,881 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 599 transitions. Word has length 31 [2021-12-06 23:57:30,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:30,881 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 599 transitions. [2021-12-06 23:57:30,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:30,882 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 599 transitions. [2021-12-06 23:57:30,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 23:57:30,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:30,885 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:30,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:57:30,885 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:30,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:30,886 INFO L85 PathProgramCache]: Analyzing trace with hash 511429272, now seen corresponding path program 1 times [2021-12-06 23:57:30,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:30,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859303180] [2021-12-06 23:57:30,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:30,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:30,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:30,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859303180] [2021-12-06 23:57:30,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859303180] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:30,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:30,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:57:30,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129550763] [2021-12-06 23:57:30,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:30,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:57:30,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:30,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:57:30,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:30,993 INFO L87 Difference]: Start difference. First operand 413 states and 599 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:31,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:31,545 INFO L93 Difference]: Finished difference Result 1211 states and 1763 transitions. [2021-12-06 23:57:31,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:57:31,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-12-06 23:57:31,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:31,550 INFO L225 Difference]: With dead ends: 1211 [2021-12-06 23:57:31,550 INFO L226 Difference]: Without dead ends: 800 [2021-12-06 23:57:31,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:31,553 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 144 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:31,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 118 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 23:57:31,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-12-06 23:57:31,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 789. [2021-12-06 23:57:31,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 1.3756345177664975) internal successors, (1084), 788 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:31,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1084 transitions. [2021-12-06 23:57:31,589 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1084 transitions. Word has length 99 [2021-12-06 23:57:31,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:31,590 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 1084 transitions. [2021-12-06 23:57:31,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:31,590 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1084 transitions. [2021-12-06 23:57:31,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 23:57:31,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:31,592 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:31,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 23:57:31,593 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:31,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:31,593 INFO L85 PathProgramCache]: Analyzing trace with hash -2046842248, now seen corresponding path program 1 times [2021-12-06 23:57:31,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:31,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583781830] [2021-12-06 23:57:31,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:31,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:31,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:31,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583781830] [2021-12-06 23:57:31,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583781830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:31,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:31,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:57:31,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606228968] [2021-12-06 23:57:31,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:31,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:57:31,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:31,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:57:31,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:31,722 INFO L87 Difference]: Start difference. First operand 789 states and 1084 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:32,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:32,231 INFO L93 Difference]: Finished difference Result 1945 states and 2614 transitions. [2021-12-06 23:57:32,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:57:32,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-12-06 23:57:32,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:32,239 INFO L225 Difference]: With dead ends: 1945 [2021-12-06 23:57:32,239 INFO L226 Difference]: Without dead ends: 1158 [2021-12-06 23:57:32,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:32,242 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 120 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:32,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 190 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 23:57:32,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-12-06 23:57:32,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1157. [2021-12-06 23:57:32,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 1.2716262975778547) internal successors, (1470), 1156 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:32,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1470 transitions. [2021-12-06 23:57:32,274 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1470 transitions. Word has length 100 [2021-12-06 23:57:32,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:32,274 INFO L470 AbstractCegarLoop]: Abstraction has 1157 states and 1470 transitions. [2021-12-06 23:57:32,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:32,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1470 transitions. [2021-12-06 23:57:32,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-06 23:57:32,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:32,278 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:32,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 23:57:32,278 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:32,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:32,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1827645373, now seen corresponding path program 1 times [2021-12-06 23:57:32,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:32,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707718413] [2021-12-06 23:57:32,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:32,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:32,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:32,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707718413] [2021-12-06 23:57:32,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707718413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:32,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:32,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:57:32,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883025012] [2021-12-06 23:57:32,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:32,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:57:32,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:32,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:57:32,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:57:32,421 INFO L87 Difference]: Start difference. First operand 1157 states and 1470 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:33,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:33,335 INFO L93 Difference]: Finished difference Result 3445 states and 4568 transitions. [2021-12-06 23:57:33,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:57:33,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 158 [2021-12-06 23:57:33,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:33,345 INFO L225 Difference]: With dead ends: 3445 [2021-12-06 23:57:33,345 INFO L226 Difference]: Without dead ends: 2474 [2021-12-06 23:57:33,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:57:33,347 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 333 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:33,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 95 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 23:57:33,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-12-06 23:57:33,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 2473. [2021-12-06 23:57:33,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2472 states have (on average 1.287621359223301) internal successors, (3183), 2472 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:33,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 3183 transitions. [2021-12-06 23:57:33,387 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 3183 transitions. Word has length 158 [2021-12-06 23:57:33,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:33,387 INFO L470 AbstractCegarLoop]: Abstraction has 2473 states and 3183 transitions. [2021-12-06 23:57:33,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:33,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 3183 transitions. [2021-12-06 23:57:33,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-06 23:57:33,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:33,391 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 23:57:33,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 23:57:33,391 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:33,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:33,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1853380539, now seen corresponding path program 1 times [2021-12-06 23:57:33,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:33,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220460835] [2021-12-06 23:57:33,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:33,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:33,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:33,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220460835] [2021-12-06 23:57:33,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220460835] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:33,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:33,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:57:33,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775254188] [2021-12-06 23:57:33,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:33,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:57:33,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:33,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:57:33,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:33,481 INFO L87 Difference]: Start difference. First operand 2473 states and 3183 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:34,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:34,039 INFO L93 Difference]: Finished difference Result 5695 states and 7520 transitions. [2021-12-06 23:57:34,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:57:34,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 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 211 [2021-12-06 23:57:34,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:34,053 INFO L225 Difference]: With dead ends: 5695 [2021-12-06 23:57:34,054 INFO L226 Difference]: Without dead ends: 3592 [2021-12-06 23:57:34,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:34,057 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 136 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:34,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 347 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 23:57:34,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2021-12-06 23:57:34,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 3579. [2021-12-06 23:57:34,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3579 states, 3578 states have (on average 1.252375628842929) internal successors, (4481), 3578 states have internal predecessors, (4481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:34,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3579 states to 3579 states and 4481 transitions. [2021-12-06 23:57:34,113 INFO L78 Accepts]: Start accepts. Automaton has 3579 states and 4481 transitions. Word has length 211 [2021-12-06 23:57:34,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:34,113 INFO L470 AbstractCegarLoop]: Abstraction has 3579 states and 4481 transitions. [2021-12-06 23:57:34,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:34,114 INFO L276 IsEmpty]: Start isEmpty. Operand 3579 states and 4481 transitions. [2021-12-06 23:57:34,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-12-06 23:57:34,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:34,116 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 23:57:34,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 23:57:34,117 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:34,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:34,117 INFO L85 PathProgramCache]: Analyzing trace with hash 898941365, now seen corresponding path program 1 times [2021-12-06 23:57:34,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:34,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188591095] [2021-12-06 23:57:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:34,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-06 23:57:34,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:34,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188591095] [2021-12-06 23:57:34,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188591095] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:34,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:34,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:57:34,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851377784] [2021-12-06 23:57:34,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:34,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:57:34,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:34,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:57:34,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:34,204 INFO L87 Difference]: Start difference. First operand 3579 states and 4481 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:34,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:34,718 INFO L93 Difference]: Finished difference Result 7726 states and 9781 transitions. [2021-12-06 23:57:34,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:57:34,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 212 [2021-12-06 23:57:34,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:34,735 INFO L225 Difference]: With dead ends: 7726 [2021-12-06 23:57:34,735 INFO L226 Difference]: Without dead ends: 4517 [2021-12-06 23:57:34,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:34,739 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 171 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:34,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 346 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 23:57:34,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2021-12-06 23:57:34,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 4499. [2021-12-06 23:57:34,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4499 states, 4498 states have (on average 1.240773677189862) internal successors, (5581), 4498 states have internal predecessors, (5581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:34,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4499 states to 4499 states and 5581 transitions. [2021-12-06 23:57:34,811 INFO L78 Accepts]: Start accepts. Automaton has 4499 states and 5581 transitions. Word has length 212 [2021-12-06 23:57:34,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:34,811 INFO L470 AbstractCegarLoop]: Abstraction has 4499 states and 5581 transitions. [2021-12-06 23:57:34,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:34,812 INFO L276 IsEmpty]: Start isEmpty. Operand 4499 states and 5581 transitions. [2021-12-06 23:57:34,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-12-06 23:57:34,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:34,814 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 23:57:34,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 23:57:34,814 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:34,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:34,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1164869568, now seen corresponding path program 1 times [2021-12-06 23:57:34,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:34,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881995997] [2021-12-06 23:57:34,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:34,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-06 23:57:34,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:34,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881995997] [2021-12-06 23:57:34,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881995997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:34,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:34,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:57:34,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679931989] [2021-12-06 23:57:34,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:34,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:57:34,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:34,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:57:34,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:34,886 INFO L87 Difference]: Start difference. First operand 4499 states and 5581 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:35,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:35,506 INFO L93 Difference]: Finished difference Result 9741 states and 12305 transitions. [2021-12-06 23:57:35,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:57:35,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 213 [2021-12-06 23:57:35,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:35,527 INFO L225 Difference]: With dead ends: 9741 [2021-12-06 23:57:35,527 INFO L226 Difference]: Without dead ends: 5612 [2021-12-06 23:57:35,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:35,531 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 166 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:35,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 371 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 23:57:35,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5612 states. [2021-12-06 23:57:35,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5612 to 5419. [2021-12-06 23:57:35,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5419 states, 5418 states have (on average 1.2331118493909192) internal successors, (6681), 5418 states have internal predecessors, (6681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:35,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5419 states to 5419 states and 6681 transitions. [2021-12-06 23:57:35,606 INFO L78 Accepts]: Start accepts. Automaton has 5419 states and 6681 transitions. Word has length 213 [2021-12-06 23:57:35,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:35,607 INFO L470 AbstractCegarLoop]: Abstraction has 5419 states and 6681 transitions. [2021-12-06 23:57:35,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:35,607 INFO L276 IsEmpty]: Start isEmpty. Operand 5419 states and 6681 transitions. [2021-12-06 23:57:35,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-06 23:57:35,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:35,610 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 23:57:35,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 23:57:35,610 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:35,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:35,611 INFO L85 PathProgramCache]: Analyzing trace with hash 479506802, now seen corresponding path program 1 times [2021-12-06 23:57:35,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:35,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499058321] [2021-12-06 23:57:35,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:35,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:35,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:35,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499058321] [2021-12-06 23:57:35,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499058321] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:35,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:35,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:57:35,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265223924] [2021-12-06 23:57:35,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:35,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:57:35,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:35,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:57:35,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:57:35,710 INFO L87 Difference]: Start difference. First operand 5419 states and 6681 transitions. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:36,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:36,693 INFO L93 Difference]: Finished difference Result 16399 states and 20713 transitions. [2021-12-06 23:57:36,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:57:36,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 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 233 [2021-12-06 23:57:36,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:36,735 INFO L225 Difference]: With dead ends: 16399 [2021-12-06 23:57:36,735 INFO L226 Difference]: Without dead ends: 11350 [2021-12-06 23:57:36,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:57:36,741 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 306 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:36,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 194 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 23:57:36,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11350 states. [2021-12-06 23:57:36,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11350 to 11344. [2021-12-06 23:57:36,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11344 states, 11343 states have (on average 1.2060301507537687) internal successors, (13680), 11343 states have internal predecessors, (13680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:36,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11344 states to 11344 states and 13680 transitions. [2021-12-06 23:57:36,872 INFO L78 Accepts]: Start accepts. Automaton has 11344 states and 13680 transitions. Word has length 233 [2021-12-06 23:57:36,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:36,873 INFO L470 AbstractCegarLoop]: Abstraction has 11344 states and 13680 transitions. [2021-12-06 23:57:36,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:36,874 INFO L276 IsEmpty]: Start isEmpty. Operand 11344 states and 13680 transitions. [2021-12-06 23:57:36,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-06 23:57:36,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:36,878 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:36,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 23:57:36,879 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:36,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:36,879 INFO L85 PathProgramCache]: Analyzing trace with hash 483937782, now seen corresponding path program 1 times [2021-12-06 23:57:36,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:36,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894029414] [2021-12-06 23:57:36,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:36,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-06 23:57:36,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:36,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894029414] [2021-12-06 23:57:36,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894029414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:36,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:36,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:57:36,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215254007] [2021-12-06 23:57:36,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:36,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:57:36,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:36,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:57:36,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:36,965 INFO L87 Difference]: Start difference. First operand 11344 states and 13680 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:37,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:37,499 INFO L93 Difference]: Finished difference Result 25075 states and 30489 transitions. [2021-12-06 23:57:37,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:57:37,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2021-12-06 23:57:37,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:37,524 INFO L225 Difference]: With dead ends: 25075 [2021-12-06 23:57:37,524 INFO L226 Difference]: Without dead ends: 14101 [2021-12-06 23:57:37,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:37,535 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 115 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:37,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 153 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 23:57:37,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14101 states. [2021-12-06 23:57:37,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14101 to 13547. [2021-12-06 23:57:37,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13547 states, 13546 states have (on average 1.1601210689502437) internal successors, (15715), 13546 states have internal predecessors, (15715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:37,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13547 states to 13547 states and 15715 transitions. [2021-12-06 23:57:37,698 INFO L78 Accepts]: Start accepts. Automaton has 13547 states and 15715 transitions. Word has length 234 [2021-12-06 23:57:37,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:37,698 INFO L470 AbstractCegarLoop]: Abstraction has 13547 states and 15715 transitions. [2021-12-06 23:57:37,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:37,698 INFO L276 IsEmpty]: Start isEmpty. Operand 13547 states and 15715 transitions. [2021-12-06 23:57:37,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-12-06 23:57:37,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:37,704 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 23:57:37,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 23:57:37,705 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:37,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:37,705 INFO L85 PathProgramCache]: Analyzing trace with hash -554811765, now seen corresponding path program 1 times [2021-12-06 23:57:37,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:37,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134735572] [2021-12-06 23:57:37,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:37,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:37,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:37,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:37,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134735572] [2021-12-06 23:57:37,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134735572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:37,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:37,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:57:37,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032929194] [2021-12-06 23:57:37,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:37,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:57:37,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:37,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:57:37,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:57:37,821 INFO L87 Difference]: Start difference. First operand 13547 states and 15715 transitions. Second operand has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:38,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:38,821 INFO L93 Difference]: Finished difference Result 32623 states and 38078 transitions. [2021-12-06 23:57:38,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:57:38,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-12-06 23:57:38,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:38,841 INFO L225 Difference]: With dead ends: 32623 [2021-12-06 23:57:38,842 INFO L226 Difference]: Without dead ends: 19446 [2021-12-06 23:57:38,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:57:38,851 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 320 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:38,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 107 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 23:57:38,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19446 states. [2021-12-06 23:57:39,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19446 to 17962. [2021-12-06 23:57:39,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17962 states, 17961 states have (on average 1.158120371916931) internal successors, (20801), 17961 states have internal predecessors, (20801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:39,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17962 states to 17962 states and 20801 transitions. [2021-12-06 23:57:39,073 INFO L78 Accepts]: Start accepts. Automaton has 17962 states and 20801 transitions. Word has length 243 [2021-12-06 23:57:39,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:39,074 INFO L470 AbstractCegarLoop]: Abstraction has 17962 states and 20801 transitions. [2021-12-06 23:57:39,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:39,074 INFO L276 IsEmpty]: Start isEmpty. Operand 17962 states and 20801 transitions. [2021-12-06 23:57:39,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-12-06 23:57:39,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:39,077 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 23:57:39,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 23:57:39,078 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:39,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:39,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1688647778, now seen corresponding path program 1 times [2021-12-06 23:57:39,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:39,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490672005] [2021-12-06 23:57:39,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:39,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-06 23:57:39,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:39,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490672005] [2021-12-06 23:57:39,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490672005] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:39,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:39,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:57:39,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100502736] [2021-12-06 23:57:39,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:39,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:57:39,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:39,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:57:39,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:39,161 INFO L87 Difference]: Start difference. First operand 17962 states and 20801 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:39,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:39,738 INFO L93 Difference]: Finished difference Result 35185 states and 40785 transitions. [2021-12-06 23:57:39,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:57:39,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 250 [2021-12-06 23:57:39,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:39,762 INFO L225 Difference]: With dead ends: 35185 [2021-12-06 23:57:39,763 INFO L226 Difference]: Without dead ends: 17409 [2021-12-06 23:57:39,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:39,774 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 170 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:39,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 378 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 23:57:39,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17409 states. [2021-12-06 23:57:39,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17409 to 17217. [2021-12-06 23:57:39,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17217 states, 17216 states have (on average 1.1367913568773234) internal successors, (19571), 17216 states have internal predecessors, (19571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17217 states to 17217 states and 19571 transitions. [2021-12-06 23:57:39,956 INFO L78 Accepts]: Start accepts. Automaton has 17217 states and 19571 transitions. Word has length 250 [2021-12-06 23:57:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:39,957 INFO L470 AbstractCegarLoop]: Abstraction has 17217 states and 19571 transitions. [2021-12-06 23:57:39,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:39,957 INFO L276 IsEmpty]: Start isEmpty. Operand 17217 states and 19571 transitions. [2021-12-06 23:57:39,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-12-06 23:57:39,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:39,961 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 23:57:39,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 23:57:39,961 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:39,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:39,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1152681977, now seen corresponding path program 1 times [2021-12-06 23:57:39,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:39,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481012190] [2021-12-06 23:57:39,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:39,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 113 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:40,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:40,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481012190] [2021-12-06 23:57:40,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481012190] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:57:40,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99151903] [2021-12-06 23:57:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:40,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:57:40,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:57:40,108 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:57:40,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:57:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:40,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 23:57:40,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:57:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:40,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:57:40,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99151903] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:40,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:57:40,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-06 23:57:40,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218180631] [2021-12-06 23:57:40,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:40,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:57:40,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:40,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:57:40,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:57:40,745 INFO L87 Difference]: Start difference. First operand 17217 states and 19571 transitions. Second operand has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:41,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:41,453 INFO L93 Difference]: Finished difference Result 32042 states and 36493 transitions. [2021-12-06 23:57:41,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:57:41,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 264 [2021-12-06 23:57:41,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:41,466 INFO L225 Difference]: With dead ends: 32042 [2021-12-06 23:57:41,466 INFO L226 Difference]: Without dead ends: 17223 [2021-12-06 23:57:41,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:57:41,473 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 167 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:41,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 179 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 23:57:41,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17223 states. [2021-12-06 23:57:41,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17223 to 17217. [2021-12-06 23:57:41,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17217 states, 17216 states have (on average 1.1353973048327137) internal successors, (19547), 17216 states have internal predecessors, (19547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:41,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17217 states to 17217 states and 19547 transitions. [2021-12-06 23:57:41,649 INFO L78 Accepts]: Start accepts. Automaton has 17217 states and 19547 transitions. Word has length 264 [2021-12-06 23:57:41,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:41,649 INFO L470 AbstractCegarLoop]: Abstraction has 17217 states and 19547 transitions. [2021-12-06 23:57:41,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:41,650 INFO L276 IsEmpty]: Start isEmpty. Operand 17217 states and 19547 transitions. [2021-12-06 23:57:41,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-12-06 23:57:41,655 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:41,655 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:41,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:57:41,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:57:41,857 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:41,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:41,858 INFO L85 PathProgramCache]: Analyzing trace with hash -800517391, now seen corresponding path program 1 times [2021-12-06 23:57:41,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:41,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47090350] [2021-12-06 23:57:41,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:41,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-12-06 23:57:41,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:41,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47090350] [2021-12-06 23:57:41,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47090350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:41,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:41,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:57:41,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264260163] [2021-12-06 23:57:41,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:41,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:57:41,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:41,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:57:41,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:41,967 INFO L87 Difference]: Start difference. First operand 17217 states and 19547 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:42,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:42,516 INFO L93 Difference]: Finished difference Result 35899 states and 40779 transitions. [2021-12-06 23:57:42,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:57:42,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 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 298 [2021-12-06 23:57:42,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:42,533 INFO L225 Difference]: With dead ends: 35899 [2021-12-06 23:57:42,533 INFO L226 Difference]: Without dead ends: 21080 [2021-12-06 23:57:42,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:42,542 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 191 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:42,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 151 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 23:57:42,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21080 states. [2021-12-06 23:57:42,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21080 to 18136. [2021-12-06 23:57:42,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18136 states, 18135 states have (on average 1.1355390129583678) internal successors, (20593), 18135 states have internal predecessors, (20593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:42,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18136 states to 18136 states and 20593 transitions. [2021-12-06 23:57:42,747 INFO L78 Accepts]: Start accepts. Automaton has 18136 states and 20593 transitions. Word has length 298 [2021-12-06 23:57:42,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:42,748 INFO L470 AbstractCegarLoop]: Abstraction has 18136 states and 20593 transitions. [2021-12-06 23:57:42,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:42,748 INFO L276 IsEmpty]: Start isEmpty. Operand 18136 states and 20593 transitions. [2021-12-06 23:57:42,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-12-06 23:57:42,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:42,752 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:42,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 23:57:42,753 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:42,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:42,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1136282861, now seen corresponding path program 1 times [2021-12-06 23:57:42,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:42,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20380350] [2021-12-06 23:57:42,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:42,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-06 23:57:42,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:42,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20380350] [2021-12-06 23:57:42,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20380350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:42,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:42,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:57:42,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338720603] [2021-12-06 23:57:42,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:42,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:57:42,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:42,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:57:42,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:57:42,856 INFO L87 Difference]: Start difference. First operand 18136 states and 20593 transitions. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:43,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:43,851 INFO L93 Difference]: Finished difference Result 41457 states and 47289 transitions. [2021-12-06 23:57:43,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:57:43,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 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 [2021-12-06 23:57:43,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:43,870 INFO L225 Difference]: With dead ends: 41457 [2021-12-06 23:57:43,870 INFO L226 Difference]: Without dead ends: 24978 [2021-12-06 23:57:43,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:57:43,879 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 315 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:43,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 406 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 23:57:43,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24978 states. [2021-12-06 23:57:44,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24978 to 20164. [2021-12-06 23:57:44,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20164 states, 20163 states have (on average 1.1247830184000396) internal successors, (22679), 20163 states have internal predecessors, (22679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:44,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20164 states to 20164 states and 22679 transitions. [2021-12-06 23:57:44,104 INFO L78 Accepts]: Start accepts. Automaton has 20164 states and 22679 transitions. Word has length 302 [2021-12-06 23:57:44,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:44,105 INFO L470 AbstractCegarLoop]: Abstraction has 20164 states and 22679 transitions. [2021-12-06 23:57:44,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:44,105 INFO L276 IsEmpty]: Start isEmpty. Operand 20164 states and 22679 transitions. [2021-12-06 23:57:44,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-12-06 23:57:44,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:44,111 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 23:57:44,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 23:57:44,111 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:44,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:44,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1067278363, now seen corresponding path program 1 times [2021-12-06 23:57:44,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:44,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492190809] [2021-12-06 23:57:44,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:44,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:44,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 56 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:44,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:44,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492190809] [2021-12-06 23:57:44,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492190809] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:57:44,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238111394] [2021-12-06 23:57:44,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:44,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:57:44,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:57:44,259 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:57:44,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:57:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:44,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 23:57:44,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:57:44,593 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-06 23:57:44,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:57:44,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238111394] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:44,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:57:44,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-06 23:57:44,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076122171] [2021-12-06 23:57:44,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:44,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:57:44,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:44,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:57:44,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:57:44,596 INFO L87 Difference]: Start difference. First operand 20164 states and 22679 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:45,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:45,080 INFO L93 Difference]: Finished difference Result 20350 states and 22870 transitions. [2021-12-06 23:57:45,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:57:45,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 311 [2021-12-06 23:57:45,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:45,097 INFO L225 Difference]: With dead ends: 20350 [2021-12-06 23:57:45,097 INFO L226 Difference]: Without dead ends: 20348 [2021-12-06 23:57:45,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:57:45,102 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 156 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:45,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 382 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 23:57:45,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20348 states. [2021-12-06 23:57:45,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20348 to 20164. [2021-12-06 23:57:45,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20164 states, 20163 states have (on average 1.1247830184000396) internal successors, (22679), 20163 states have internal predecessors, (22679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:45,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20164 states to 20164 states and 22679 transitions. [2021-12-06 23:57:45,295 INFO L78 Accepts]: Start accepts. Automaton has 20164 states and 22679 transitions. Word has length 311 [2021-12-06 23:57:45,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:45,295 INFO L470 AbstractCegarLoop]: Abstraction has 20164 states and 22679 transitions. [2021-12-06 23:57:45,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:45,296 INFO L276 IsEmpty]: Start isEmpty. Operand 20164 states and 22679 transitions. [2021-12-06 23:57:45,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-12-06 23:57:45,300 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:45,301 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:45,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:57:45,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:57:45,503 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:45,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:45,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1650248133, now seen corresponding path program 1 times [2021-12-06 23:57:45,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:45,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081122445] [2021-12-06 23:57:45,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:45,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 23:57:45,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:45,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081122445] [2021-12-06 23:57:45,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081122445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:45,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:45,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:57:45,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645387430] [2021-12-06 23:57:45,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:45,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:57:45,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:45,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:57:45,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:57:45,604 INFO L87 Difference]: Start difference. First operand 20164 states and 22679 transitions. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:46,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:46,736 INFO L93 Difference]: Finished difference Result 46981 states and 52838 transitions. [2021-12-06 23:57:46,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:57:46,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 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 [2021-12-06 23:57:46,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:46,756 INFO L225 Difference]: With dead ends: 46981 [2021-12-06 23:57:46,756 INFO L226 Difference]: Without dead ends: 29215 [2021-12-06 23:57:46,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:57:46,762 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 344 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:46,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 78 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 23:57:46,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29215 states. [2021-12-06 23:57:46,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29215 to 26993. [2021-12-06 23:57:46,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26993 states, 26992 states have (on average 1.121184054534677) internal successors, (30263), 26992 states have internal predecessors, (30263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:47,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26993 states to 26993 states and 30263 transitions. [2021-12-06 23:57:47,014 INFO L78 Accepts]: Start accepts. Automaton has 26993 states and 30263 transitions. Word has length 318 [2021-12-06 23:57:47,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:47,014 INFO L470 AbstractCegarLoop]: Abstraction has 26993 states and 30263 transitions. [2021-12-06 23:57:47,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:47,014 INFO L276 IsEmpty]: Start isEmpty. Operand 26993 states and 30263 transitions. [2021-12-06 23:57:47,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2021-12-06 23:57:47,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:47,020 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 23:57:47,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 23:57:47,021 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:47,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:47,021 INFO L85 PathProgramCache]: Analyzing trace with hash 623756768, now seen corresponding path program 1 times [2021-12-06 23:57:47,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:47,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085409817] [2021-12-06 23:57:47,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:47,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 57 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:47,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:47,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085409817] [2021-12-06 23:57:47,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085409817] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:57:47,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142318430] [2021-12-06 23:57:47,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:47,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:57:47,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:57:47,114 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:57:47,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:57:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:47,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 23:57:47,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:57:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 57 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:47,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:57:48,994 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 57 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:48,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142318430] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:57:48,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:57:48,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2021-12-06 23:57:48,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197715689] [2021-12-06 23:57:48,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:57:48,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 23:57:48,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:48,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 23:57:48,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:57:48,996 INFO L87 Difference]: Start difference. First operand 26993 states and 30263 transitions. Second operand has 10 states, 10 states have (on average 68.9) internal successors, (689), 9 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:51,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:51,647 INFO L93 Difference]: Finished difference Result 72084 states and 80692 transitions. [2021-12-06 23:57:51,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:57:51,648 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 68.9) internal successors, (689), 9 states have internal predecessors, (689), 0 states have call successors, (0), 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 329 [2021-12-06 23:57:51,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:51,687 INFO L225 Difference]: With dead ends: 72084 [2021-12-06 23:57:51,688 INFO L226 Difference]: Without dead ends: 48041 [2021-12-06 23:57:51,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 652 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:57:51,703 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 1301 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3572 mSolverCounterSat, 596 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1301 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 4168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 596 IncrementalHoareTripleChecker+Valid, 3572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:51,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1301 Valid, 192 Invalid, 4168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [596 Valid, 3572 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 23:57:51,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48041 states. [2021-12-06 23:57:52,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48041 to 43060. [2021-12-06 23:57:52,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43060 states, 43059 states have (on average 1.1203697252606888) internal successors, (48242), 43059 states have internal predecessors, (48242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:52,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43060 states to 43060 states and 48242 transitions. [2021-12-06 23:57:52,195 INFO L78 Accepts]: Start accepts. Automaton has 43060 states and 48242 transitions. Word has length 329 [2021-12-06 23:57:52,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:52,195 INFO L470 AbstractCegarLoop]: Abstraction has 43060 states and 48242 transitions. [2021-12-06 23:57:52,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 68.9) internal successors, (689), 9 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:52,195 INFO L276 IsEmpty]: Start isEmpty. Operand 43060 states and 48242 transitions. [2021-12-06 23:57:52,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2021-12-06 23:57:52,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:52,204 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:52,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:57:52,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 23:57:52,405 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:52,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:52,407 INFO L85 PathProgramCache]: Analyzing trace with hash 855192324, now seen corresponding path program 1 times [2021-12-06 23:57:52,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:52,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185435346] [2021-12-06 23:57:52,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:52,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 265 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-06 23:57:52,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:52,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185435346] [2021-12-06 23:57:52,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185435346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:52,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:52,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:57:52,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215835399] [2021-12-06 23:57:52,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:52,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:57:52,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:52,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:57:52,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:57:52,529 INFO L87 Difference]: Start difference. First operand 43060 states and 48242 transitions. Second operand has 4 states, 4 states have (on average 62.5) internal successors, (250), 4 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:53,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:53,563 INFO L93 Difference]: Finished difference Result 89077 states and 99656 transitions. [2021-12-06 23:57:53,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:57:53,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.5) internal successors, (250), 4 states have internal predecessors, (250), 0 states have call successors, (0), 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 353 [2021-12-06 23:57:53,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:53,606 INFO L225 Difference]: With dead ends: 89077 [2021-12-06 23:57:53,606 INFO L226 Difference]: Without dead ends: 49153 [2021-12-06 23:57:53,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:57:53,625 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 341 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:53,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 60 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 23:57:53,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49153 states. [2021-12-06 23:57:54,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49153 to 44711. [2021-12-06 23:57:54,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44711 states, 44710 states have (on average 1.1186759114292104) internal successors, (50016), 44710 states have internal predecessors, (50016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44711 states to 44711 states and 50016 transitions. [2021-12-06 23:57:54,094 INFO L78 Accepts]: Start accepts. Automaton has 44711 states and 50016 transitions. Word has length 353 [2021-12-06 23:57:54,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:54,094 INFO L470 AbstractCegarLoop]: Abstraction has 44711 states and 50016 transitions. [2021-12-06 23:57:54,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.5) internal successors, (250), 4 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:54,094 INFO L276 IsEmpty]: Start isEmpty. Operand 44711 states and 50016 transitions. [2021-12-06 23:57:54,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-12-06 23:57:54,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:54,107 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:54,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 23:57:54,107 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:54,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:54,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1639835473, now seen corresponding path program 1 times [2021-12-06 23:57:54,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:54,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893644769] [2021-12-06 23:57:54,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:54,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 160 proven. 133 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-06 23:57:54,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:54,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893644769] [2021-12-06 23:57:54,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893644769] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:57:54,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793609645] [2021-12-06 23:57:54,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:54,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:57:54,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:57:54,216 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:57:54,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:57:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:54,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 23:57:54,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:57:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-12-06 23:57:54,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:57:54,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793609645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:54,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:57:54,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-06 23:57:54,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427897471] [2021-12-06 23:57:54,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:54,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:57:54,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:54,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:57:54,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:57:54,603 INFO L87 Difference]: Start difference. First operand 44711 states and 50016 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:55,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:55,171 INFO L93 Difference]: Finished difference Result 86097 states and 96328 transitions. [2021-12-06 23:57:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:57:55,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 389 [2021-12-06 23:57:55,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:55,209 INFO L225 Difference]: With dead ends: 86097 [2021-12-06 23:57:55,209 INFO L226 Difference]: Without dead ends: 44522 [2021-12-06 23:57:55,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:57:55,227 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 197 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:55,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 293 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 23:57:55,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44522 states. [2021-12-06 23:57:55,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44522 to 44153. [2021-12-06 23:57:55,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44153 states, 44152 states have (on average 1.113063960862475) internal successors, (49144), 44152 states have internal predecessors, (49144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:55,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44153 states to 44153 states and 49144 transitions. [2021-12-06 23:57:55,664 INFO L78 Accepts]: Start accepts. Automaton has 44153 states and 49144 transitions. Word has length 389 [2021-12-06 23:57:55,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:55,664 INFO L470 AbstractCegarLoop]: Abstraction has 44153 states and 49144 transitions. [2021-12-06 23:57:55,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:55,664 INFO L276 IsEmpty]: Start isEmpty. Operand 44153 states and 49144 transitions. [2021-12-06 23:57:55,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-12-06 23:57:55,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:55,681 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-06 23:57:55,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 23:57:55,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:57:55,883 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:55,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:55,884 INFO L85 PathProgramCache]: Analyzing trace with hash 830831852, now seen corresponding path program 1 times [2021-12-06 23:57:55,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:55,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855994521] [2021-12-06 23:57:55,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:55,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-12-06 23:57:56,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:56,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855994521] [2021-12-06 23:57:56,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855994521] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:56,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:56,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:57:56,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979041228] [2021-12-06 23:57:56,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:56,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:57:56,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:56,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:57:56,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:56,041 INFO L87 Difference]: Start difference. First operand 44153 states and 49144 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:56,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:56,741 INFO L93 Difference]: Finished difference Result 84249 states and 93656 transitions. [2021-12-06 23:57:56,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:57:56,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 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 [2021-12-06 23:57:56,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:56,777 INFO L225 Difference]: With dead ends: 84249 [2021-12-06 23:57:56,777 INFO L226 Difference]: Without dead ends: 43232 [2021-12-06 23:57:56,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:56,795 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 164 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:56,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 355 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 23:57:56,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43232 states. [2021-12-06 23:57:57,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43232 to 25876. [2021-12-06 23:57:57,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25876 states, 25875 states have (on average 1.1108405797101448) internal successors, (28743), 25875 states have internal predecessors, (28743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25876 states to 25876 states and 28743 transitions. [2021-12-06 23:57:57,140 INFO L78 Accepts]: Start accepts. Automaton has 25876 states and 28743 transitions. Word has length 404 [2021-12-06 23:57:57,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:57,140 INFO L470 AbstractCegarLoop]: Abstraction has 25876 states and 28743 transitions. [2021-12-06 23:57:57,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:57,141 INFO L276 IsEmpty]: Start isEmpty. Operand 25876 states and 28743 transitions. [2021-12-06 23:57:57,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2021-12-06 23:57:57,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:57,150 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:57,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 23:57:57,151 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:57,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:57,151 INFO L85 PathProgramCache]: Analyzing trace with hash 908773697, now seen corresponding path program 1 times [2021-12-06 23:57:57,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:57,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63696105] [2021-12-06 23:57:57,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:57,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2021-12-06 23:57:57,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:57,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63696105] [2021-12-06 23:57:57,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63696105] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:57:57,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276295000] [2021-12-06 23:57:57,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:57,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:57:57,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:57:57,296 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:57:57,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:57:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:57,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 23:57:57,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:57:57,680 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2021-12-06 23:57:57,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:57:57,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276295000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:57,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:57:57,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-06 23:57:57,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097837701] [2021-12-06 23:57:57,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:57,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:57:57,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:57,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:57:57,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:57:57,682 INFO L87 Difference]: Start difference. First operand 25876 states and 28743 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:58,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:58,302 INFO L93 Difference]: Finished difference Result 53035 states and 58857 transitions. [2021-12-06 23:57:58,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:57:58,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 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 426 [2021-12-06 23:57:58,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:58,330 INFO L225 Difference]: With dead ends: 53035 [2021-12-06 23:57:58,330 INFO L226 Difference]: Without dead ends: 27529 [2021-12-06 23:57:58,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:57:58,343 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 175 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:58,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 135 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 23:57:58,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27529 states. [2021-12-06 23:57:58,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27529 to 24947. [2021-12-06 23:57:58,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24947 states, 24946 states have (on average 1.1080333520404073) internal successors, (27641), 24946 states have internal predecessors, (27641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:58,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24947 states to 24947 states and 27641 transitions. [2021-12-06 23:57:58,656 INFO L78 Accepts]: Start accepts. Automaton has 24947 states and 27641 transitions. Word has length 426 [2021-12-06 23:57:58,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:58,656 INFO L470 AbstractCegarLoop]: Abstraction has 24947 states and 27641 transitions. [2021-12-06 23:57:58,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:58,656 INFO L276 IsEmpty]: Start isEmpty. Operand 24947 states and 27641 transitions. [2021-12-06 23:57:58,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2021-12-06 23:57:58,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:58,670 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:58,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 23:57:58,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 23:57:58,872 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:58,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:58,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1414202340, now seen corresponding path program 1 times [2021-12-06 23:57:58,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:58,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596985010] [2021-12-06 23:57:58,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:58,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 510 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-06 23:57:59,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:59,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596985010] [2021-12-06 23:57:59,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596985010] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:59,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:59,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:57:59,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922111544] [2021-12-06 23:57:59,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:59,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:57:59,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:59,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:57:59,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:57:59,037 INFO L87 Difference]: Start difference. First operand 24947 states and 27641 transitions. Second operand has 4 states, 4 states have (on average 122.25) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:59,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:59,936 INFO L93 Difference]: Finished difference Result 58006 states and 64332 transitions. [2021-12-06 23:57:59,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:57:59,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 122.25) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 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 517 [2021-12-06 23:57:59,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:59,962 INFO L225 Difference]: With dead ends: 58006 [2021-12-06 23:57:59,963 INFO L226 Difference]: Without dead ends: 33429 [2021-12-06 23:57:59,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:57:59,974 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 120 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:59,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 103 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 23:57:59,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33429 states. [2021-12-06 23:58:00,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33429 to 31030. [2021-12-06 23:58:00,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31030 states, 31029 states have (on average 1.1006477811079958) internal successors, (34152), 31029 states have internal predecessors, (34152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:00,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31030 states to 31030 states and 34152 transitions. [2021-12-06 23:58:00,289 INFO L78 Accepts]: Start accepts. Automaton has 31030 states and 34152 transitions. Word has length 517 [2021-12-06 23:58:00,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:58:00,290 INFO L470 AbstractCegarLoop]: Abstraction has 31030 states and 34152 transitions. [2021-12-06 23:58:00,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 122.25) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:00,290 INFO L276 IsEmpty]: Start isEmpty. Operand 31030 states and 34152 transitions. [2021-12-06 23:58:00,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2021-12-06 23:58:00,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:58:00,327 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:58:00,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 23:58:00,328 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:58:00,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:58:00,328 INFO L85 PathProgramCache]: Analyzing trace with hash 348163194, now seen corresponding path program 1 times [2021-12-06 23:58:00,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:58:00,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702900529] [2021-12-06 23:58:00,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:00,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:58:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 29 proven. 394 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-06 23:58:00,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:58:00,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702900529] [2021-12-06 23:58:00,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702900529] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:58:00,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984913984] [2021-12-06 23:58:00,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:00,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:58:00,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:58:00,487 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:58:00,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 23:58:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:00,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:58:00,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:58:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 29 proven. 394 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-06 23:58:01,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:58:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 29 proven. 394 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-06 23:58:05,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984913984] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:58:05,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:58:05,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 11 [2021-12-06 23:58:05,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100961801] [2021-12-06 23:58:05,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:58:05,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:58:05,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:58:05,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:58:05,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:58:05,460 INFO L87 Difference]: Start difference. First operand 31030 states and 34152 transitions. Second operand has 12 states, 12 states have (on average 96.58333333333333) internal successors, (1159), 11 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:10,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:58:10,976 INFO L93 Difference]: Finished difference Result 99845 states and 109861 transitions. [2021-12-06 23:58:10,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 23:58:10,977 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 96.58333333333333) internal successors, (1159), 11 states have internal predecessors, (1159), 0 states have call successors, (0), 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 555 [2021-12-06 23:58:10,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:58:11,032 INFO L225 Difference]: With dead ends: 99845 [2021-12-06 23:58:11,032 INFO L226 Difference]: Without dead ends: 72133 [2021-12-06 23:58:11,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1119 GetRequests, 1102 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:58:11,046 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 2006 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 4794 mSolverCounterSat, 1287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2006 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 6081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1287 IncrementalHoareTripleChecker+Valid, 4794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:58:11,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2006 Valid, 239 Invalid, 6081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1287 Valid, 4794 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-06 23:58:11,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72133 states. [2021-12-06 23:58:11,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72133 to 43555. [2021-12-06 23:58:11,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43555 states, 43554 states have (on average 1.100656656105065) internal successors, (47938), 43554 states have internal predecessors, (47938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:11,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43555 states to 43555 states and 47938 transitions. [2021-12-06 23:58:11,606 INFO L78 Accepts]: Start accepts. Automaton has 43555 states and 47938 transitions. Word has length 555 [2021-12-06 23:58:11,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:58:11,607 INFO L470 AbstractCegarLoop]: Abstraction has 43555 states and 47938 transitions. [2021-12-06 23:58:11,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 96.58333333333333) internal successors, (1159), 11 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:11,607 INFO L276 IsEmpty]: Start isEmpty. Operand 43555 states and 47938 transitions. [2021-12-06 23:58:11,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 825 [2021-12-06 23:58:11,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:58:11,631 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:58:11,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 23:58:11,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:58:11,833 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:58:11,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:58:11,835 INFO L85 PathProgramCache]: Analyzing trace with hash 494176387, now seen corresponding path program 1 times [2021-12-06 23:58:11,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:58:11,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055552550] [2021-12-06 23:58:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:11,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:58:11,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1883 backedges. 1352 proven. 0 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2021-12-06 23:58:12,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:58:12,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055552550] [2021-12-06 23:58:12,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055552550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:58:12,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:58:12,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:58:12,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403381610] [2021-12-06 23:58:12,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:58:12,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:58:12,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:58:12,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:58:12,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:58:12,045 INFO L87 Difference]: Start difference. First operand 43555 states and 47938 transitions. Second operand has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:12,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:58:12,713 INFO L93 Difference]: Finished difference Result 86409 states and 95036 transitions. [2021-12-06 23:58:12,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:58:12,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 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 824 [2021-12-06 23:58:12,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:58:12,753 INFO L225 Difference]: With dead ends: 86409 [2021-12-06 23:58:12,754 INFO L226 Difference]: Without dead ends: 44884 [2021-12-06 23:58:12,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:58:12,775 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 101 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:58:12,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 147 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 23:58:12,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44884 states. [2021-12-06 23:58:13,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44884 to 40977. [2021-12-06 23:58:13,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40977 states, 40976 states have (on average 1.092078289730574) internal successors, (44749), 40976 states have internal predecessors, (44749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:13,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40977 states to 40977 states and 44749 transitions. [2021-12-06 23:58:13,323 INFO L78 Accepts]: Start accepts. Automaton has 40977 states and 44749 transitions. Word has length 824 [2021-12-06 23:58:13,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:58:13,323 INFO L470 AbstractCegarLoop]: Abstraction has 40977 states and 44749 transitions. [2021-12-06 23:58:13,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:13,323 INFO L276 IsEmpty]: Start isEmpty. Operand 40977 states and 44749 transitions. [2021-12-06 23:58:13,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 858 [2021-12-06 23:58:13,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:58:13,346 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:58:13,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 23:58:13,346 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:58:13,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:58:13,347 INFO L85 PathProgramCache]: Analyzing trace with hash 694363988, now seen corresponding path program 1 times [2021-12-06 23:58:13,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:58:13,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334821134] [2021-12-06 23:58:13,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:13,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:58:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 1342 proven. 0 refuted. 0 times theorem prover too weak. 965 trivial. 0 not checked. [2021-12-06 23:58:13,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:58:13,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334821134] [2021-12-06 23:58:13,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334821134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:58:13,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:58:13,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:58:13,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984563621] [2021-12-06 23:58:13,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:58:13,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:58:13,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:58:13,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:58:13,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:58:13,558 INFO L87 Difference]: Start difference. First operand 40977 states and 44749 transitions. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:14,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:58:14,231 INFO L93 Difference]: Finished difference Result 72185 states and 78810 transitions. [2021-12-06 23:58:14,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:58:14,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 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 857 [2021-12-06 23:58:14,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:58:14,258 INFO L225 Difference]: With dead ends: 72185 [2021-12-06 23:58:14,258 INFO L226 Difference]: Without dead ends: 31578 [2021-12-06 23:58:14,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:58:14,274 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 74 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:58:14,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 339 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 23:58:14,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31578 states. [2021-12-06 23:58:14,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31578 to 29544. [2021-12-06 23:58:14,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29544 states, 29543 states have (on average 1.0833023051145787) internal successors, (32004), 29543 states have internal predecessors, (32004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:14,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29544 states to 29544 states and 32004 transitions. [2021-12-06 23:58:14,637 INFO L78 Accepts]: Start accepts. Automaton has 29544 states and 32004 transitions. Word has length 857 [2021-12-06 23:58:14,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:58:14,637 INFO L470 AbstractCegarLoop]: Abstraction has 29544 states and 32004 transitions. [2021-12-06 23:58:14,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:14,638 INFO L276 IsEmpty]: Start isEmpty. Operand 29544 states and 32004 transitions. [2021-12-06 23:58:14,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 884 [2021-12-06 23:58:14,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:58:14,661 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:58:14,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 23:58:14,661 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:58:14,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:58:14,662 INFO L85 PathProgramCache]: Analyzing trace with hash -928684543, now seen corresponding path program 1 times [2021-12-06 23:58:14,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:58:14,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146064804] [2021-12-06 23:58:14,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:14,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:58:14,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 1561 proven. 511 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-12-06 23:58:15,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:58:15,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146064804] [2021-12-06 23:58:15,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146064804] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:58:15,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301975504] [2021-12-06 23:58:15,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:15,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:58:15,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:58:15,048 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:58:15,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 23:58:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:15,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 23:58:15,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:58:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 1576 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2021-12-06 23:58:15,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:58:15,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301975504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:58:15,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:58:15,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2021-12-06 23:58:15,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361395968] [2021-12-06 23:58:15,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:58:15,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:58:15,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:58:15,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:58:15,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:58:15,728 INFO L87 Difference]: Start difference. First operand 29544 states and 32004 transitions. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:16,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:58:16,627 INFO L93 Difference]: Finished difference Result 63142 states and 68430 transitions. [2021-12-06 23:58:16,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:58:16,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 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 883 [2021-12-06 23:58:16,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:58:16,657 INFO L225 Difference]: With dead ends: 63142 [2021-12-06 23:58:16,657 INFO L226 Difference]: Without dead ends: 33968 [2021-12-06 23:58:16,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 892 GetRequests, 884 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:58:16,673 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 73 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:58:16,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 321 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 23:58:16,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33968 states. [2021-12-06 23:58:17,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33968 to 32126. [2021-12-06 23:58:17,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32126 states, 32125 states have (on average 1.077852140077821) internal successors, (34626), 32125 states have internal predecessors, (34626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:17,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32126 states to 32126 states and 34626 transitions. [2021-12-06 23:58:17,105 INFO L78 Accepts]: Start accepts. Automaton has 32126 states and 34626 transitions. Word has length 883 [2021-12-06 23:58:17,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:58:17,105 INFO L470 AbstractCegarLoop]: Abstraction has 32126 states and 34626 transitions. [2021-12-06 23:58:17,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:17,106 INFO L276 IsEmpty]: Start isEmpty. Operand 32126 states and 34626 transitions. [2021-12-06 23:58:17,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 964 [2021-12-06 23:58:17,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:58:17,139 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:58:17,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 23:58:17,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:58:17,342 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:58:17,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:58:17,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1330643231, now seen corresponding path program 1 times [2021-12-06 23:58:17,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:58:17,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888039519] [2021-12-06 23:58:17,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:17,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:58:17,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2563 backedges. 1714 proven. 629 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-12-06 23:58:17,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:58:17,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888039519] [2021-12-06 23:58:17,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888039519] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:58:17,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990399330] [2021-12-06 23:58:17,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:17,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:58:17,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:58:17,762 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:58:17,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 23:58:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:17,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 1224 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 23:58:17,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:58:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2563 backedges. 1175 proven. 0 refuted. 0 times theorem prover too weak. 1388 trivial. 0 not checked. [2021-12-06 23:58:18,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:58:18,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990399330] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:58:18,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:58:18,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2021-12-06 23:58:18,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272189385] [2021-12-06 23:58:18,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:58:18,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:58:18,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:58:18,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:58:18,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:58:18,670 INFO L87 Difference]: Start difference. First operand 32126 states and 34626 transitions. Second operand has 4 states, 4 states have (on average 99.25) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:19,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:58:19,674 INFO L93 Difference]: Finished difference Result 69964 states and 75464 transitions. [2021-12-06 23:58:19,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:58:19,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 963 [2021-12-06 23:58:19,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:58:19,704 INFO L225 Difference]: With dead ends: 69964 [2021-12-06 23:58:19,704 INFO L226 Difference]: Without dead ends: 38208 [2021-12-06 23:58:19,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 972 GetRequests, 963 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:58:19,718 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 214 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:58:19,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 101 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 23:58:19,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38208 states. [2021-12-06 23:58:20,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38208 to 31574. [2021-12-06 23:58:20,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31574 states, 31573 states have (on average 1.0764260602413454) internal successors, (33986), 31573 states have internal predecessors, (33986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:20,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31574 states to 31574 states and 33986 transitions. [2021-12-06 23:58:20,090 INFO L78 Accepts]: Start accepts. Automaton has 31574 states and 33986 transitions. Word has length 963 [2021-12-06 23:58:20,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:58:20,091 INFO L470 AbstractCegarLoop]: Abstraction has 31574 states and 33986 transitions. [2021-12-06 23:58:20,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:20,091 INFO L276 IsEmpty]: Start isEmpty. Operand 31574 states and 33986 transitions. [2021-12-06 23:58:20,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 967 [2021-12-06 23:58:20,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:58:20,115 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:58:20,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 23:58:20,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 23:58:20,317 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:58:20,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:58:20,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1776183958, now seen corresponding path program 1 times [2021-12-06 23:58:20,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:58:20,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494081802] [2021-12-06 23:58:20,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:20,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:58:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2609 backedges. 1755 proven. 184 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked. [2021-12-06 23:58:20,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:58:20,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494081802] [2021-12-06 23:58:20,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494081802] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:58:20,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593576071] [2021-12-06 23:58:20,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:20,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:58:20,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:58:20,675 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:58:20,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 23:58:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:20,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 23:58:20,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:58:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2609 backedges. 1627 proven. 434 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2021-12-06 23:58:21,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:58:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2609 backedges. 2061 proven. 0 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2021-12-06 23:58:22,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593576071] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:58:22,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:58:22,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 13 [2021-12-06 23:58:22,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813704049] [2021-12-06 23:58:22,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:58:22,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:58:22,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:58:22,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:58:22,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:58:22,550 INFO L87 Difference]: Start difference. First operand 31574 states and 33986 transitions. Second operand has 5 states, 5 states have (on average 115.2) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:23,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:58:23,616 INFO L93 Difference]: Finished difference Result 68674 states and 73993 transitions. [2021-12-06 23:58:23,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:58:23,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 115.2) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 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 966 [2021-12-06 23:58:23,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:58:23,650 INFO L225 Difference]: With dead ends: 68674 [2021-12-06 23:58:23,650 INFO L226 Difference]: Without dead ends: 39310 [2021-12-06 23:58:23,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1938 GetRequests, 1926 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:58:23,665 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 278 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:58:23,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 66 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 23:58:23,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39310 states. [2021-12-06 23:58:24,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39310 to 37468. [2021-12-06 23:58:24,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37468 states, 37467 states have (on average 1.0766274321402836) internal successors, (40338), 37467 states have internal predecessors, (40338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:24,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37468 states to 37468 states and 40338 transitions. [2021-12-06 23:58:24,102 INFO L78 Accepts]: Start accepts. Automaton has 37468 states and 40338 transitions. Word has length 966 [2021-12-06 23:58:24,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:58:24,102 INFO L470 AbstractCegarLoop]: Abstraction has 37468 states and 40338 transitions. [2021-12-06 23:58:24,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.2) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:24,102 INFO L276 IsEmpty]: Start isEmpty. Operand 37468 states and 40338 transitions. [2021-12-06 23:58:24,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1079 [2021-12-06 23:58:24,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:58:24,128 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:58:24,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 23:58:24,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:58:24,331 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:58:24,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:58:24,333 INFO L85 PathProgramCache]: Analyzing trace with hash 919653917, now seen corresponding path program 1 times [2021-12-06 23:58:24,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:58:24,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618107194] [2021-12-06 23:58:24,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:24,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:58:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3450 backedges. 2272 proven. 735 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2021-12-06 23:58:24,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:58:24,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618107194] [2021-12-06 23:58:24,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618107194] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:58:24,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433012982] [2021-12-06 23:58:24,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:24,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:58:24,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:58:24,781 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:58:24,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 23:58:24,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:24,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 1365 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 23:58:25,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:58:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3450 backedges. 2063 proven. 221 refuted. 0 times theorem prover too weak. 1166 trivial. 0 not checked. [2021-12-06 23:58:26,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:58:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3450 backedges. 1928 proven. 192 refuted. 0 times theorem prover too weak. 1330 trivial. 0 not checked. [2021-12-06 23:58:28,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433012982] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:58:28,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:58:28,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 16 [2021-12-06 23:58:28,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024286137] [2021-12-06 23:58:28,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:58:28,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 23:58:28,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:58:28,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 23:58:28,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-12-06 23:58:28,226 INFO L87 Difference]: Start difference. First operand 37468 states and 40338 transitions. Second operand has 16 states, 16 states have (on average 103.375) internal successors, (1654), 16 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:35,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:58:35,049 INFO L93 Difference]: Finished difference Result 92956 states and 99924 transitions. [2021-12-06 23:58:35,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 23:58:35,050 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 103.375) internal successors, (1654), 16 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1078 [2021-12-06 23:58:35,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:58:35,050 INFO L225 Difference]: With dead ends: 92956 [2021-12-06 23:58:35,050 INFO L226 Difference]: Without dead ends: 0 [2021-12-06 23:58:35,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2236 GetRequests, 2185 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=642, Invalid=2114, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 23:58:35,072 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 2060 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 12497 mSolverCounterSat, 898 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2060 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 13395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 898 IncrementalHoareTripleChecker+Valid, 12497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:58:35,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2060 Valid, 361 Invalid, 13395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [898 Valid, 12497 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-12-06 23:58:35,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-06 23:58:35,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-06 23:58:35,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:35,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-06 23:58:35,073 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1078 [2021-12-06 23:58:35,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:58:35,074 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 23:58:35,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 103.375) internal successors, (1654), 16 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:35,074 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-06 23:58:35,074 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-06 23:58:35,076 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 23:58:35,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 23:58:35,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_673c8a68-9da4-4df2-9922-7875c662f947/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 23:58:35,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.