./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label05.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label05.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4412c092ac5bb9a20226d840ef536f074ec24f66edbc7e3c25a2c5b9769362d5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:32:53,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:32:53,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:32:53,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:32:53,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:32:53,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:32:53,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:32:53,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:32:53,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:32:53,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:32:53,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:32:53,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:32:53,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:32:53,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:32:53,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:32:53,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:32:53,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:32:53,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:32:53,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:32:53,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:32:53,439 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:32:53,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:32:53,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:32:53,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:32:53,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:32:53,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:32:53,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:32:53,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:32:53,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:32:53,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:32:53,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:32:53,458 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:32:53,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:32:53,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:32:53,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:32:53,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:32:53,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:32:53,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:32:53,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:32:53,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:32:53,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:32:53,469 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:32:53,516 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:32:53,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:32:53,517 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:32:53,517 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:32:53,518 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:32:53,518 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:32:53,519 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:32:53,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:32:53,519 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:32:53,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:32:53,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:32:53,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:32:53,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:32:53,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:32:53,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:32:53,521 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:32:53,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:32:53,521 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:32:53,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:32:53,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:32:53,522 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:32:53,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:32:53,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:32:53,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:32:53,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:32:53,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:32:53,523 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:32:53,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:32:53,523 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:32:53,524 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:32:53,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:32:53,524 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:32:53,524 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_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4412c092ac5bb9a20226d840ef536f074ec24f66edbc7e3c25a2c5b9769362d5 [2021-11-07 08:32:53,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:32:53,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:32:53,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:32:53,908 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:32:53,909 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:32:53,909 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-11-07 08:32:53,982 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/data/d0e1e8bf3/3f99d40f17484302990014a39dcb296b/FLAG9c5337fd9 [2021-11-07 08:32:55,050 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:32:55,052 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-11-07 08:32:55,094 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/data/d0e1e8bf3/3f99d40f17484302990014a39dcb296b/FLAG9c5337fd9 [2021-11-07 08:32:55,461 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/data/d0e1e8bf3/3f99d40f17484302990014a39dcb296b [2021-11-07 08:32:55,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:32:55,465 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:32:55,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:32:55,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:32:55,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:32:55,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:32:55" (1/1) ... [2021-11-07 08:32:55,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2525736a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:55, skipping insertion in model container [2021-11-07 08:32:55,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:32:55" (1/1) ... [2021-11-07 08:32:55,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:32:55,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:32:56,200 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label05.c[11795,11808] [2021-11-07 08:32:56,285 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label05.c[18488,18501] [2021-11-07 08:32:57,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:32:57,380 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:32:57,448 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label05.c[11795,11808] [2021-11-07 08:32:57,464 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label05.c[18488,18501] [2021-11-07 08:32:58,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:32:58,372 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:32:58,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:58 WrapperNode [2021-11-07 08:32:58,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:32:58,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:32:58,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:32:58,375 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:32:58,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:58" (1/1) ... [2021-11-07 08:32:58,454 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:58" (1/1) ... [2021-11-07 08:32:58,853 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:32:58,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:32:58,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:32:58,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:32:58,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:58" (1/1) ... [2021-11-07 08:32:58,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:58" (1/1) ... [2021-11-07 08:32:59,000 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:58" (1/1) ... [2021-11-07 08:32:59,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:58" (1/1) ... [2021-11-07 08:32:59,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:58" (1/1) ... [2021-11-07 08:32:59,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:58" (1/1) ... [2021-11-07 08:32:59,297 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:58" (1/1) ... [2021-11-07 08:32:59,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:32:59,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:32:59,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:32:59,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:32:59,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:58" (1/1) ... [2021-11-07 08:32:59,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:32:59,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:32:59,419 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:32:59,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:32:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:32:59,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:32:59,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:32:59,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:33:04,997 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:33:04,997 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2021-11-07 08:33:05,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:33:05 BoogieIcfgContainer [2021-11-07 08:33:05,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:33:05,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:33:05,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:33:05,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:33:05,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:32:55" (1/3) ... [2021-11-07 08:33:05,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8959aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:33:05, skipping insertion in model container [2021-11-07 08:33:05,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:58" (2/3) ... [2021-11-07 08:33:05,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8959aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:33:05, skipping insertion in model container [2021-11-07 08:33:05,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:33:05" (3/3) ... [2021-11-07 08:33:05,010 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-11-07 08:33:05,015 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:33:05,015 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 08:33:05,092 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:33:05,101 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:33:05,101 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 08:33:05,150 INFO L276 IsEmpty]: Start isEmpty. Operand has 910 states, 907 states have (on average 1.9007717750826902) internal successors, (1724), 909 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:05,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 08:33:05,165 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:05,167 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:05,168 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:05,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:05,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1083425478, now seen corresponding path program 1 times [2021-11-07 08:33:05,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:05,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565943816] [2021-11-07 08:33:05,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:05,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:05,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:05,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565943816] [2021-11-07 08:33:05,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565943816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:05,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:05,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:33:05,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374826508] [2021-11-07 08:33:05,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:33:05,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:05,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:33:05,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:33:05,493 INFO L87 Difference]: Start difference. First operand has 910 states, 907 states have (on average 1.9007717750826902) internal successors, (1724), 909 states have internal predecessors, (1724), 0 states have call successors, (0), 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 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:05,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:05,588 INFO L93 Difference]: Finished difference Result 1781 states and 3376 transitions. [2021-11-07 08:33:05,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:33:05,589 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-11-07 08:33:05,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:05,614 INFO L225 Difference]: With dead ends: 1781 [2021-11-07 08:33:05,614 INFO L226 Difference]: Without dead ends: 844 [2021-11-07 08:33:05,623 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:33:05,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-11-07 08:33:05,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2021-11-07 08:33:05,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 842 states have (on average 1.8895486935866983) internal successors, (1591), 843 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:05,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1591 transitions. [2021-11-07 08:33:05,756 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1591 transitions. Word has length 34 [2021-11-07 08:33:05,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:05,757 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1591 transitions. [2021-11-07 08:33:05,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:05,758 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1591 transitions. [2021-11-07 08:33:05,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 08:33:05,766 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:05,766 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:05,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:33:05,767 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:05,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:05,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1592898568, now seen corresponding path program 1 times [2021-11-07 08:33:05,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:05,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699673644] [2021-11-07 08:33:05,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:05,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:05,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:05,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:05,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699673644] [2021-11-07 08:33:05,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699673644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:05,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:05,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:33:05,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485538172] [2021-11-07 08:33:06,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:33:06,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:06,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:33:06,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:33:06,002 INFO L87 Difference]: Start difference. First operand 844 states and 1591 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:06,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:06,126 INFO L93 Difference]: Finished difference Result 901 states and 1679 transitions. [2021-11-07 08:33:06,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:33:06,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-11-07 08:33:06,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:06,133 INFO L225 Difference]: With dead ends: 901 [2021-11-07 08:33:06,134 INFO L226 Difference]: Without dead ends: 844 [2021-11-07 08:33:06,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:33:06,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-11-07 08:33:06,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2021-11-07 08:33:06,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 842 states have (on average 1.852731591448931) internal successors, (1560), 843 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:06,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1560 transitions. [2021-11-07 08:33:06,163 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1560 transitions. Word has length 34 [2021-11-07 08:33:06,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:06,164 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1560 transitions. [2021-11-07 08:33:06,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:06,164 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1560 transitions. [2021-11-07 08:33:06,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 08:33:06,167 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:06,167 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:06,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:33:06,168 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:06,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:06,168 INFO L85 PathProgramCache]: Analyzing trace with hash -445282779, now seen corresponding path program 1 times [2021-11-07 08:33:06,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:06,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895739895] [2021-11-07 08:33:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:06,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:06,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:06,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895739895] [2021-11-07 08:33:06,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895739895] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:06,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:06,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:33:06,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980215453] [2021-11-07 08:33:06,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:33:06,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:06,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:33:06,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:33:06,350 INFO L87 Difference]: Start difference. First operand 844 states and 1560 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:14,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:14,322 INFO L93 Difference]: Finished difference Result 3099 states and 5869 transitions. [2021-11-07 08:33:14,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:33:14,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-11-07 08:33:14,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:14,357 INFO L225 Difference]: With dead ends: 3099 [2021-11-07 08:33:14,357 INFO L226 Difference]: Without dead ends: 2346 [2021-11-07 08:33:14,359 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:33:14,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-11-07 08:33:14,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 2346. [2021-11-07 08:33:14,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2344 states have (on average 1.5085324232081911) internal successors, (3536), 2345 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:14,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 3536 transitions. [2021-11-07 08:33:14,438 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 3536 transitions. Word has length 60 [2021-11-07 08:33:14,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:14,439 INFO L470 AbstractCegarLoop]: Abstraction has 2346 states and 3536 transitions. [2021-11-07 08:33:14,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:14,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 3536 transitions. [2021-11-07 08:33:14,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 08:33:14,444 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:14,444 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:14,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:33:14,445 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:14,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:14,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1337087153, now seen corresponding path program 1 times [2021-11-07 08:33:14,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:14,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727950926] [2021-11-07 08:33:14,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:14,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:14,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:14,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727950926] [2021-11-07 08:33:14,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727950926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:14,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:14,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:33:14,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058677178] [2021-11-07 08:33:14,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:33:14,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:14,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:33:14,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:14,544 INFO L87 Difference]: Start difference. First operand 2346 states and 3536 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:14,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:14,593 INFO L93 Difference]: Finished difference Result 2446 states and 3694 transitions. [2021-11-07 08:33:14,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:33:14,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-11-07 08:33:14,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:14,613 INFO L225 Difference]: With dead ends: 2446 [2021-11-07 08:33:14,613 INFO L226 Difference]: Without dead ends: 2393 [2021-11-07 08:33:14,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:14,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2393 states. [2021-11-07 08:33:14,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2393 to 2391. [2021-11-07 08:33:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2389 states have (on average 1.5102553369610716) internal successors, (3608), 2390 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:14,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 3608 transitions. [2021-11-07 08:33:14,688 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 3608 transitions. Word has length 64 [2021-11-07 08:33:14,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:14,689 INFO L470 AbstractCegarLoop]: Abstraction has 2391 states and 3608 transitions. [2021-11-07 08:33:14,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:14,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 3608 transitions. [2021-11-07 08:33:14,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 08:33:14,695 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:14,695 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:14,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:33:14,696 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:14,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:14,696 INFO L85 PathProgramCache]: Analyzing trace with hash -119101755, now seen corresponding path program 1 times [2021-11-07 08:33:14,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:14,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702179058] [2021-11-07 08:33:14,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:14,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:14,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:14,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:14,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702179058] [2021-11-07 08:33:14,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702179058] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:14,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:14,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 08:33:14,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226385916] [2021-11-07 08:33:14,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:33:14,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:14,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:33:14,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:33:14,843 INFO L87 Difference]: Start difference. First operand 2391 states and 3608 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:15,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:15,124 INFO L93 Difference]: Finished difference Result 3371 states and 5168 transitions. [2021-11-07 08:33:15,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:33:15,125 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-11-07 08:33:15,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:15,147 INFO L225 Difference]: With dead ends: 3371 [2021-11-07 08:33:15,147 INFO L226 Difference]: Without dead ends: 3273 [2021-11-07 08:33:15,150 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:33:15,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-11-07 08:33:15,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2487. [2021-11-07 08:33:15,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2485 states have (on average 1.5126760563380282) internal successors, (3759), 2486 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:15,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 3759 transitions. [2021-11-07 08:33:15,245 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 3759 transitions. Word has length 64 [2021-11-07 08:33:15,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:15,247 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 3759 transitions. [2021-11-07 08:33:15,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:15,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 3759 transitions. [2021-11-07 08:33:15,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 08:33:15,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:15,250 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:15,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:33:15,250 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:15,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:15,251 INFO L85 PathProgramCache]: Analyzing trace with hash 91634997, now seen corresponding path program 1 times [2021-11-07 08:33:15,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:15,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549777922] [2021-11-07 08:33:15,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:15,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:15,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:15,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:15,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549777922] [2021-11-07 08:33:15,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549777922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:15,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:15,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:33:15,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9028051] [2021-11-07 08:33:15,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:33:15,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:15,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:33:15,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:15,382 INFO L87 Difference]: Start difference. First operand 2487 states and 3759 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:15,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:15,489 INFO L93 Difference]: Finished difference Result 2853 states and 4335 transitions. [2021-11-07 08:33:15,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:33:15,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 08:33:15,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:15,519 INFO L225 Difference]: With dead ends: 2853 [2021-11-07 08:33:15,519 INFO L226 Difference]: Without dead ends: 2659 [2021-11-07 08:33:15,521 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:15,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2021-11-07 08:33:15,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2653. [2021-11-07 08:33:15,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2653 states, 2651 states have (on average 1.5137683892870615) internal successors, (4013), 2652 states have internal predecessors, (4013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:15,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 4013 transitions. [2021-11-07 08:33:15,629 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 4013 transitions. Word has length 66 [2021-11-07 08:33:15,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:15,630 INFO L470 AbstractCegarLoop]: Abstraction has 2653 states and 4013 transitions. [2021-11-07 08:33:15,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:15,631 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 4013 transitions. [2021-11-07 08:33:15,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 08:33:15,632 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:15,632 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:15,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:33:15,633 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:15,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:15,634 INFO L85 PathProgramCache]: Analyzing trace with hash 158128509, now seen corresponding path program 1 times [2021-11-07 08:33:15,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:15,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262400007] [2021-11-07 08:33:15,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:15,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:15,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:15,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262400007] [2021-11-07 08:33:15,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262400007] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:15,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:15,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 08:33:15,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113737062] [2021-11-07 08:33:15,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:33:15,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:15,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:33:15,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:33:15,927 INFO L87 Difference]: Start difference. First operand 2653 states and 4013 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:16,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:16,187 INFO L93 Difference]: Finished difference Result 3015 states and 4575 transitions. [2021-11-07 08:33:16,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:33:16,188 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 08:33:16,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:16,207 INFO L225 Difference]: With dead ends: 3015 [2021-11-07 08:33:16,207 INFO L226 Difference]: Without dead ends: 2655 [2021-11-07 08:33:16,212 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:33:16,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2021-11-07 08:33:16,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 2653. [2021-11-07 08:33:16,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2653 states, 2651 states have (on average 1.5122595247076576) internal successors, (4009), 2652 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:16,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 4009 transitions. [2021-11-07 08:33:16,315 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 4009 transitions. Word has length 66 [2021-11-07 08:33:16,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:16,316 INFO L470 AbstractCegarLoop]: Abstraction has 2653 states and 4009 transitions. [2021-11-07 08:33:16,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:16,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 4009 transitions. [2021-11-07 08:33:16,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 08:33:16,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:16,319 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:16,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 08:33:16,319 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:16,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:16,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1100417095, now seen corresponding path program 1 times [2021-11-07 08:33:16,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:16,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076418694] [2021-11-07 08:33:16,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:16,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:16,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:16,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076418694] [2021-11-07 08:33:16,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076418694] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:16,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:16,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:33:16,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337471740] [2021-11-07 08:33:16,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:33:16,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:16,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:33:16,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:16,402 INFO L87 Difference]: Start difference. First operand 2653 states and 4009 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:16,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:16,498 INFO L93 Difference]: Finished difference Result 3325 states and 5043 transitions. [2021-11-07 08:33:16,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:33:16,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 08:33:16,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:16,519 INFO L225 Difference]: With dead ends: 3325 [2021-11-07 08:33:16,520 INFO L226 Difference]: Without dead ends: 2965 [2021-11-07 08:33:16,522 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:16,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2021-11-07 08:33:16,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2963. [2021-11-07 08:33:16,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2963 states, 2961 states have (on average 1.5119891928402567) internal successors, (4477), 2962 states have internal predecessors, (4477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:16,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 4477 transitions. [2021-11-07 08:33:16,655 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 4477 transitions. Word has length 66 [2021-11-07 08:33:16,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:16,656 INFO L470 AbstractCegarLoop]: Abstraction has 2963 states and 4477 transitions. [2021-11-07 08:33:16,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:16,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 4477 transitions. [2021-11-07 08:33:16,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 08:33:16,657 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:16,658 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:16,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:33:16,658 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:16,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:16,659 INFO L85 PathProgramCache]: Analyzing trace with hash -826729383, now seen corresponding path program 1 times [2021-11-07 08:33:16,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:16,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041778713] [2021-11-07 08:33:16,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:16,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:16,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:16,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041778713] [2021-11-07 08:33:16,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041778713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:16,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:16,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:33:16,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201766513] [2021-11-07 08:33:16,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:33:16,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:16,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:33:16,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:16,719 INFO L87 Difference]: Start difference. First operand 2963 states and 4477 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:16,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:16,855 INFO L93 Difference]: Finished difference Result 4207 states and 6367 transitions. [2021-11-07 08:33:16,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:33:16,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 08:33:16,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:16,881 INFO L225 Difference]: With dead ends: 4207 [2021-11-07 08:33:16,882 INFO L226 Difference]: Without dead ends: 3537 [2021-11-07 08:33:16,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:16,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-11-07 08:33:17,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 3535. [2021-11-07 08:33:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3533 states have (on average 1.507217662043589) internal successors, (5325), 3534 states have internal predecessors, (5325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:17,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 5325 transitions. [2021-11-07 08:33:17,053 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 5325 transitions. Word has length 66 [2021-11-07 08:33:17,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:17,053 INFO L470 AbstractCegarLoop]: Abstraction has 3535 states and 5325 transitions. [2021-11-07 08:33:17,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:17,054 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 5325 transitions. [2021-11-07 08:33:17,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 08:33:17,055 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:17,055 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:17,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:33:17,057 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:17,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:17,058 INFO L85 PathProgramCache]: Analyzing trace with hash 992342265, now seen corresponding path program 1 times [2021-11-07 08:33:17,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:17,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669257549] [2021-11-07 08:33:17,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:17,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:17,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:17,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669257549] [2021-11-07 08:33:17,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669257549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:17,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:17,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:33:17,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262292088] [2021-11-07 08:33:17,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:33:17,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:17,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:33:17,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:17,115 INFO L87 Difference]: Start difference. First operand 3535 states and 5325 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:17,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:17,308 INFO L93 Difference]: Finished difference Result 5827 states and 8751 transitions. [2021-11-07 08:33:17,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:33:17,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 08:33:17,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:17,353 INFO L225 Difference]: With dead ends: 5827 [2021-11-07 08:33:17,353 INFO L226 Difference]: Without dead ends: 4585 [2021-11-07 08:33:17,356 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:17,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4585 states. [2021-11-07 08:33:17,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4585 to 4583. [2021-11-07 08:33:17,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4583 states, 4581 states have (on average 1.4942152368478498) internal successors, (6845), 4582 states have internal predecessors, (6845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:17,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 6845 transitions. [2021-11-07 08:33:17,705 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 6845 transitions. Word has length 66 [2021-11-07 08:33:17,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:17,705 INFO L470 AbstractCegarLoop]: Abstraction has 4583 states and 6845 transitions. [2021-11-07 08:33:17,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:17,707 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 6845 transitions. [2021-11-07 08:33:17,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 08:33:17,708 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:17,708 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:17,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:33:17,709 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:17,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:17,709 INFO L85 PathProgramCache]: Analyzing trace with hash 192293446, now seen corresponding path program 1 times [2021-11-07 08:33:17,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:17,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213503519] [2021-11-07 08:33:17,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:17,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:17,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:17,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213503519] [2021-11-07 08:33:17,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213503519] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:17,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:17,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 08:33:17,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111374857] [2021-11-07 08:33:17,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:33:17,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:17,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:33:17,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:33:17,867 INFO L87 Difference]: Start difference. First operand 4583 states and 6845 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:18,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:18,341 INFO L93 Difference]: Finished difference Result 6309 states and 9347 transitions. [2021-11-07 08:33:18,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:33:18,341 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-11-07 08:33:18,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:18,358 INFO L225 Difference]: With dead ends: 6309 [2021-11-07 08:33:18,358 INFO L226 Difference]: Without dead ends: 6307 [2021-11-07 08:33:18,362 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:33:18,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6307 states. [2021-11-07 08:33:18,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6307 to 4679. [2021-11-07 08:33:18,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4679 states, 4677 states have (on average 1.4806499893093863) internal successors, (6925), 4678 states have internal predecessors, (6925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:18,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 6925 transitions. [2021-11-07 08:33:18,663 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 6925 transitions. Word has length 67 [2021-11-07 08:33:18,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:18,664 INFO L470 AbstractCegarLoop]: Abstraction has 4679 states and 6925 transitions. [2021-11-07 08:33:18,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:18,664 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 6925 transitions. [2021-11-07 08:33:18,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 08:33:18,665 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:18,666 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:18,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 08:33:18,666 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:18,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:18,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1338319212, now seen corresponding path program 1 times [2021-11-07 08:33:18,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:18,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729649178] [2021-11-07 08:33:18,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:18,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:18,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:18,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729649178] [2021-11-07 08:33:18,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729649178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:18,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:18,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:33:18,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779163087] [2021-11-07 08:33:18,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:33:18,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:18,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:33:18,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:18,733 INFO L87 Difference]: Start difference. First operand 4679 states and 6925 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:19,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:19,052 INFO L93 Difference]: Finished difference Result 7118 states and 10515 transitions. [2021-11-07 08:33:19,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:33:19,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-07 08:33:19,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:19,068 INFO L225 Difference]: With dead ends: 7118 [2021-11-07 08:33:19,068 INFO L226 Difference]: Without dead ends: 5771 [2021-11-07 08:33:19,073 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:19,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5771 states. [2021-11-07 08:33:19,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5771 to 5769. [2021-11-07 08:33:19,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5769 states, 5767 states have (on average 1.470261834576036) internal successors, (8479), 5768 states have internal predecessors, (8479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:19,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5769 states to 5769 states and 8479 transitions. [2021-11-07 08:33:19,521 INFO L78 Accepts]: Start accepts. Automaton has 5769 states and 8479 transitions. Word has length 68 [2021-11-07 08:33:19,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:19,522 INFO L470 AbstractCegarLoop]: Abstraction has 5769 states and 8479 transitions. [2021-11-07 08:33:19,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:19,522 INFO L276 IsEmpty]: Start isEmpty. Operand 5769 states and 8479 transitions. [2021-11-07 08:33:19,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 08:33:19,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:19,527 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 08:33:19,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 08:33:19,527 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:19,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:19,528 INFO L85 PathProgramCache]: Analyzing trace with hash 320828100, now seen corresponding path program 1 times [2021-11-07 08:33:19,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:19,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382029058] [2021-11-07 08:33:19,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:19,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 08:33:19,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:19,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382029058] [2021-11-07 08:33:19,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382029058] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:19,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:19,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 08:33:19,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585145556] [2021-11-07 08:33:19,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:33:19,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:19,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:33:19,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:33:19,664 INFO L87 Difference]: Start difference. First operand 5769 states and 8479 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:21,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:21,338 INFO L93 Difference]: Finished difference Result 23845 states and 34581 transitions. [2021-11-07 08:33:21,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:33:21,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 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 94 [2021-11-07 08:33:21,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:21,395 INFO L225 Difference]: With dead ends: 23845 [2021-11-07 08:33:21,395 INFO L226 Difference]: Without dead ends: 20371 [2021-11-07 08:33:21,407 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:33:21,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20371 states. [2021-11-07 08:33:22,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20371 to 9241. [2021-11-07 08:33:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9241 states, 9239 states have (on average 1.4563264422556554) internal successors, (13455), 9240 states have internal predecessors, (13455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:22,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 13455 transitions. [2021-11-07 08:33:22,298 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 13455 transitions. Word has length 94 [2021-11-07 08:33:22,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:22,299 INFO L470 AbstractCegarLoop]: Abstraction has 9241 states and 13455 transitions. [2021-11-07 08:33:22,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:22,299 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 13455 transitions. [2021-11-07 08:33:22,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 08:33:22,303 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:22,303 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 08:33:22,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:33:22,304 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:22,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:22,305 INFO L85 PathProgramCache]: Analyzing trace with hash 350350318, now seen corresponding path program 1 times [2021-11-07 08:33:22,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:22,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053638034] [2021-11-07 08:33:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:22,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:22,420 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 08:33:22,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:22,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053638034] [2021-11-07 08:33:22,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053638034] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:22,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:22,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 08:33:22,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170971810] [2021-11-07 08:33:22,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:33:22,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:22,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:33:22,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:33:22,423 INFO L87 Difference]: Start difference. First operand 9241 states and 13455 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:23,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:23,782 INFO L93 Difference]: Finished difference Result 27317 states and 39557 transitions. [2021-11-07 08:33:23,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:33:23,783 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 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 94 [2021-11-07 08:33:23,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:23,845 INFO L225 Difference]: With dead ends: 27317 [2021-11-07 08:33:23,846 INFO L226 Difference]: Without dead ends: 23843 [2021-11-07 08:33:23,857 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:33:23,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23843 states. [2021-11-07 08:33:25,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23843 to 14457. [2021-11-07 08:33:25,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14457 states, 14455 states have (on average 1.4444136976824629) internal successors, (20879), 14456 states have internal predecessors, (20879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:25,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14457 states to 14457 states and 20879 transitions. [2021-11-07 08:33:25,142 INFO L78 Accepts]: Start accepts. Automaton has 14457 states and 20879 transitions. Word has length 94 [2021-11-07 08:33:25,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:25,143 INFO L470 AbstractCegarLoop]: Abstraction has 14457 states and 20879 transitions. [2021-11-07 08:33:25,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:25,143 INFO L276 IsEmpty]: Start isEmpty. Operand 14457 states and 20879 transitions. [2021-11-07 08:33:25,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 08:33:25,148 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:25,148 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 08:33:25,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 08:33:25,149 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:25,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:25,150 INFO L85 PathProgramCache]: Analyzing trace with hash 624038030, now seen corresponding path program 1 times [2021-11-07 08:33:25,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:25,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601903173] [2021-11-07 08:33:25,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:25,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:25,257 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 08:33:25,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:25,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601903173] [2021-11-07 08:33:25,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601903173] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:25,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:25,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 08:33:25,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108047960] [2021-11-07 08:33:25,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:33:25,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:25,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:33:25,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:33:25,260 INFO L87 Difference]: Start difference. First operand 14457 states and 20879 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:27,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:27,043 INFO L93 Difference]: Finished difference Result 30789 states and 44533 transitions. [2021-11-07 08:33:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:33:27,044 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 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 94 [2021-11-07 08:33:27,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:27,100 INFO L225 Difference]: With dead ends: 30789 [2021-11-07 08:33:27,100 INFO L226 Difference]: Without dead ends: 27315 [2021-11-07 08:33:27,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:33:27,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27315 states. [2021-11-07 08:33:28,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27315 to 17929. [2021-11-07 08:33:28,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17929 states, 17927 states have (on average 1.4422379650806048) internal successors, (25855), 17928 states have internal predecessors, (25855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:28,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17929 states to 17929 states and 25855 transitions. [2021-11-07 08:33:28,733 INFO L78 Accepts]: Start accepts. Automaton has 17929 states and 25855 transitions. Word has length 94 [2021-11-07 08:33:28,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:28,734 INFO L470 AbstractCegarLoop]: Abstraction has 17929 states and 25855 transitions. [2021-11-07 08:33:28,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:28,734 INFO L276 IsEmpty]: Start isEmpty. Operand 17929 states and 25855 transitions. [2021-11-07 08:33:28,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 08:33:28,740 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:28,740 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 08:33:28,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 08:33:28,740 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:28,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:28,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1851857618, now seen corresponding path program 1 times [2021-11-07 08:33:28,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:28,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031558242] [2021-11-07 08:33:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:28,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:33:28,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:28,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031558242] [2021-11-07 08:33:28,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031558242] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:28,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:28,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 08:33:28,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213257036] [2021-11-07 08:33:28,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:33:28,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:28,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:33:28,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:33:28,863 INFO L87 Difference]: Start difference. First operand 17929 states and 25855 transitions. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:30,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:30,648 INFO L93 Difference]: Finished difference Result 34261 states and 49509 transitions. [2021-11-07 08:33:30,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:33:30,649 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 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 94 [2021-11-07 08:33:30,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:30,698 INFO L225 Difference]: With dead ends: 34261 [2021-11-07 08:33:30,699 INFO L226 Difference]: Without dead ends: 30787 [2021-11-07 08:33:30,712 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:33:30,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30787 states. [2021-11-07 08:33:32,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30787 to 21401. [2021-11-07 08:33:32,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21401 states, 21399 states have (on average 1.4407682601990748) internal successors, (30831), 21400 states have internal predecessors, (30831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:32,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21401 states to 21401 states and 30831 transitions. [2021-11-07 08:33:32,445 INFO L78 Accepts]: Start accepts. Automaton has 21401 states and 30831 transitions. Word has length 94 [2021-11-07 08:33:32,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:32,446 INFO L470 AbstractCegarLoop]: Abstraction has 21401 states and 30831 transitions. [2021-11-07 08:33:32,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:32,447 INFO L276 IsEmpty]: Start isEmpty. Operand 21401 states and 30831 transitions. [2021-11-07 08:33:32,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 08:33:32,456 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:32,456 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:32,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 08:33:32,457 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:32,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:32,458 INFO L85 PathProgramCache]: Analyzing trace with hash 2023924156, now seen corresponding path program 1 times [2021-11-07 08:33:32,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:32,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608197320] [2021-11-07 08:33:32,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:32,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:32,538 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:32,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:32,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608197320] [2021-11-07 08:33:32,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608197320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:32,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:32,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:33:32,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818890410] [2021-11-07 08:33:32,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:33:32,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:32,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:33:32,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:32,542 INFO L87 Difference]: Start difference. First operand 21401 states and 30831 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:33,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:33,594 INFO L93 Difference]: Finished difference Result 34810 states and 50228 transitions. [2021-11-07 08:33:33,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:33:33,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-11-07 08:33:33,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:33,620 INFO L225 Difference]: With dead ends: 34810 [2021-11-07 08:33:33,620 INFO L226 Difference]: Without dead ends: 15704 [2021-11-07 08:33:33,647 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:33,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15704 states. [2021-11-07 08:33:34,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15704 to 15702. [2021-11-07 08:33:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15702 states, 15700 states have (on average 1.444140127388535) internal successors, (22673), 15701 states have internal predecessors, (22673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:34,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15702 states to 15702 states and 22673 transitions. [2021-11-07 08:33:34,669 INFO L78 Accepts]: Start accepts. Automaton has 15702 states and 22673 transitions. Word has length 96 [2021-11-07 08:33:34,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:34,670 INFO L470 AbstractCegarLoop]: Abstraction has 15702 states and 22673 transitions. [2021-11-07 08:33:34,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:34,670 INFO L276 IsEmpty]: Start isEmpty. Operand 15702 states and 22673 transitions. [2021-11-07 08:33:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 08:33:34,676 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:34,677 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:34,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 08:33:34,677 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:34,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:34,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1980328951, now seen corresponding path program 1 times [2021-11-07 08:33:34,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:34,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173645274] [2021-11-07 08:33:34,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:34,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:33:34,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:34,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173645274] [2021-11-07 08:33:34,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173645274] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:34,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:34,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 08:33:34,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399319189] [2021-11-07 08:33:34,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:33:34,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:34,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:33:34,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:33:34,785 INFO L87 Difference]: Start difference. First operand 15702 states and 22673 transitions. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:36,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:36,528 INFO L93 Difference]: Finished difference Result 27874 states and 40279 transitions. [2021-11-07 08:33:36,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:33:36,528 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 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 96 [2021-11-07 08:33:36,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:36,560 INFO L225 Difference]: With dead ends: 27874 [2021-11-07 08:33:36,560 INFO L226 Difference]: Without dead ends: 25440 [2021-11-07 08:33:36,571 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:33:36,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25440 states. [2021-11-07 08:33:38,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25440 to 18134. [2021-11-07 08:33:38,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18134 states, 18132 states have (on average 1.4428082947275536) internal successors, (26161), 18133 states have internal predecessors, (26161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:38,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18134 states to 18134 states and 26161 transitions. [2021-11-07 08:33:38,233 INFO L78 Accepts]: Start accepts. Automaton has 18134 states and 26161 transitions. Word has length 96 [2021-11-07 08:33:38,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:38,233 INFO L470 AbstractCegarLoop]: Abstraction has 18134 states and 26161 transitions. [2021-11-07 08:33:38,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:38,234 INFO L276 IsEmpty]: Start isEmpty. Operand 18134 states and 26161 transitions. [2021-11-07 08:33:38,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 08:33:38,240 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:38,240 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 08:33:38,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 08:33:38,241 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:38,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:38,241 INFO L85 PathProgramCache]: Analyzing trace with hash 28168523, now seen corresponding path program 1 times [2021-11-07 08:33:38,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:38,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978776726] [2021-11-07 08:33:38,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:38,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:38,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:38,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978776726] [2021-11-07 08:33:38,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978776726] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:38,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:38,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:33:38,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688177116] [2021-11-07 08:33:38,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:33:38,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:38,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:33:38,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:38,310 INFO L87 Difference]: Start difference. First operand 18134 states and 26161 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:39,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:39,417 INFO L93 Difference]: Finished difference Result 26042 states and 37499 transitions. [2021-11-07 08:33:39,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:33:39,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-11-07 08:33:39,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:39,434 INFO L225 Difference]: With dead ends: 26042 [2021-11-07 08:33:39,434 INFO L226 Difference]: Without dead ends: 10232 [2021-11-07 08:33:39,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:39,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10232 states. [2021-11-07 08:33:40,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10232 to 10230. [2021-11-07 08:33:40,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10230 states, 10228 states have (on average 1.4392843175596401) internal successors, (14721), 10229 states have internal predecessors, (14721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:40,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10230 states to 10230 states and 14721 transitions. [2021-11-07 08:33:40,235 INFO L78 Accepts]: Start accepts. Automaton has 10230 states and 14721 transitions. Word has length 97 [2021-11-07 08:33:40,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:40,235 INFO L470 AbstractCegarLoop]: Abstraction has 10230 states and 14721 transitions. [2021-11-07 08:33:40,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:40,236 INFO L276 IsEmpty]: Start isEmpty. Operand 10230 states and 14721 transitions. [2021-11-07 08:33:40,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 08:33:40,241 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:40,241 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 08:33:40,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 08:33:40,242 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:40,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:40,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1887443071, now seen corresponding path program 1 times [2021-11-07 08:33:40,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:40,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964860275] [2021-11-07 08:33:40,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:40,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:40,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:40,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964860275] [2021-11-07 08:33:40,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964860275] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:40,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:40,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:33:40,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022675607] [2021-11-07 08:33:40,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:33:40,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:40,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:33:40,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:40,316 INFO L87 Difference]: Start difference. First operand 10230 states and 14721 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:40,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:40,773 INFO L93 Difference]: Finished difference Result 14186 states and 20339 transitions. [2021-11-07 08:33:40,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:33:40,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-11-07 08:33:40,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:40,781 INFO L225 Difference]: With dead ends: 14186 [2021-11-07 08:33:40,782 INFO L226 Difference]: Without dead ends: 6280 [2021-11-07 08:33:40,790 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:40,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6280 states. [2021-11-07 08:33:41,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6280 to 6278. [2021-11-07 08:33:41,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6278 states, 6276 states have (on average 1.4424792861695348) internal successors, (9053), 6277 states have internal predecessors, (9053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:41,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6278 states to 6278 states and 9053 transitions. [2021-11-07 08:33:41,189 INFO L78 Accepts]: Start accepts. Automaton has 6278 states and 9053 transitions. Word has length 97 [2021-11-07 08:33:41,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:41,190 INFO L470 AbstractCegarLoop]: Abstraction has 6278 states and 9053 transitions. [2021-11-07 08:33:41,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:41,190 INFO L276 IsEmpty]: Start isEmpty. Operand 6278 states and 9053 transitions. [2021-11-07 08:33:41,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 08:33:41,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:41,194 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 08:33:41,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 08:33:41,194 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:41,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:41,195 INFO L85 PathProgramCache]: Analyzing trace with hash -300840777, now seen corresponding path program 1 times [2021-11-07 08:33:41,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:41,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221765670] [2021-11-07 08:33:41,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:41,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:41,253 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:41,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:41,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221765670] [2021-11-07 08:33:41,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221765670] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:41,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:41,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:33:41,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518135067] [2021-11-07 08:33:41,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:33:41,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:41,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:33:41,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:41,256 INFO L87 Difference]: Start difference. First operand 6278 states and 9053 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:41,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:41,495 INFO L93 Difference]: Finished difference Result 8258 states and 11837 transitions. [2021-11-07 08:33:41,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:33:41,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-11-07 08:33:41,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:41,500 INFO L225 Difference]: With dead ends: 8258 [2021-11-07 08:33:41,500 INFO L226 Difference]: Without dead ends: 4304 [2021-11-07 08:33:41,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:41,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4304 states. [2021-11-07 08:33:41,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4304 to 4302. [2021-11-07 08:33:41,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4302 states, 4300 states have (on average 1.4523255813953488) internal successors, (6245), 4301 states have internal predecessors, (6245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:41,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4302 states to 4302 states and 6245 transitions. [2021-11-07 08:33:41,768 INFO L78 Accepts]: Start accepts. Automaton has 4302 states and 6245 transitions. Word has length 97 [2021-11-07 08:33:41,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:41,768 INFO L470 AbstractCegarLoop]: Abstraction has 4302 states and 6245 transitions. [2021-11-07 08:33:41,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:41,768 INFO L276 IsEmpty]: Start isEmpty. Operand 4302 states and 6245 transitions. [2021-11-07 08:33:41,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 08:33:41,770 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:41,770 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 08:33:41,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 08:33:41,771 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:41,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:41,771 INFO L85 PathProgramCache]: Analyzing trace with hash -387959571, now seen corresponding path program 1 times [2021-11-07 08:33:41,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:41,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636118716] [2021-11-07 08:33:41,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:41,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:42,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:42,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:42,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636118716] [2021-11-07 08:33:42,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636118716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:42,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965339510] [2021-11-07 08:33:42,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:42,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:42,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:42,122 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:42,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:33:42,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:42,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:33:42,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:33:43,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965339510] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:43,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:33:43,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2021-11-07 08:33:43,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829362318] [2021-11-07 08:33:43,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 08:33:43,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:43,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 08:33:43,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:33:43,160 INFO L87 Difference]: Start difference. First operand 4302 states and 6245 transitions. Second operand has 16 states, 16 states have (on average 11.6875) internal successors, (187), 16 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:47,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:47,153 INFO L93 Difference]: Finished difference Result 17204 states and 24025 transitions. [2021-11-07 08:33:47,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-07 08:33:47,155 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.6875) internal successors, (187), 16 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-07 08:33:47,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:47,178 INFO L225 Difference]: With dead ends: 17204 [2021-11-07 08:33:47,178 INFO L226 Difference]: Without dead ends: 15226 [2021-11-07 08:33:47,187 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=577, Invalid=2615, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 08:33:47,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15226 states. [2021-11-07 08:33:48,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15226 to 9175. [2021-11-07 08:33:48,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9175 states, 9173 states have (on average 1.3865692794069553) internal successors, (12719), 9174 states have internal predecessors, (12719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:48,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9175 states to 9175 states and 12719 transitions. [2021-11-07 08:33:48,351 INFO L78 Accepts]: Start accepts. Automaton has 9175 states and 12719 transitions. Word has length 97 [2021-11-07 08:33:48,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:48,351 INFO L470 AbstractCegarLoop]: Abstraction has 9175 states and 12719 transitions. [2021-11-07 08:33:48,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.6875) internal successors, (187), 16 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:48,352 INFO L276 IsEmpty]: Start isEmpty. Operand 9175 states and 12719 transitions. [2021-11-07 08:33:48,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 08:33:48,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:48,355 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 08:33:48,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-07 08:33:48,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:48,582 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:48,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:48,583 INFO L85 PathProgramCache]: Analyzing trace with hash -713626361, now seen corresponding path program 1 times [2021-11-07 08:33:48,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:48,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949376189] [2021-11-07 08:33:48,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:48,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:48,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:48,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949376189] [2021-11-07 08:33:48,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949376189] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:48,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:48,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:33:48,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318856683] [2021-11-07 08:33:48,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:33:48,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:48,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:33:48,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:48,655 INFO L87 Difference]: Start difference. First operand 9175 states and 12719 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:49,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:49,123 INFO L93 Difference]: Finished difference Result 12194 states and 16838 transitions. [2021-11-07 08:33:49,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:33:49,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-11-07 08:33:49,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:49,131 INFO L225 Difference]: With dead ends: 12194 [2021-11-07 08:33:49,131 INFO L226 Difference]: Without dead ends: 6305 [2021-11-07 08:33:49,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:49,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6305 states. [2021-11-07 08:33:49,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6305 to 6303. [2021-11-07 08:33:49,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6303 states, 6301 states have (on average 1.3893032851928266) internal successors, (8754), 6302 states have internal predecessors, (8754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:49,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6303 states to 6303 states and 8754 transitions. [2021-11-07 08:33:49,558 INFO L78 Accepts]: Start accepts. Automaton has 6303 states and 8754 transitions. Word has length 98 [2021-11-07 08:33:49,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:49,558 INFO L470 AbstractCegarLoop]: Abstraction has 6303 states and 8754 transitions. [2021-11-07 08:33:49,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:49,558 INFO L276 IsEmpty]: Start isEmpty. Operand 6303 states and 8754 transitions. [2021-11-07 08:33:49,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 08:33:49,560 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:49,560 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:49,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-07 08:33:49,561 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:49,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:49,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1294468783, now seen corresponding path program 1 times [2021-11-07 08:33:49,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:49,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575223935] [2021-11-07 08:33:49,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:49,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:49,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:49,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575223935] [2021-11-07 08:33:49,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575223935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:49,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075553533] [2021-11-07 08:33:49,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:49,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:49,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:49,862 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:49,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:33:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:50,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 08:33:50,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:51,579 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:51,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075553533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:51,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:33:51,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2021-11-07 08:33:51,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164338707] [2021-11-07 08:33:51,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 08:33:51,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:51,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 08:33:51,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:33:51,582 INFO L87 Difference]: Start difference. First operand 6303 states and 8754 transitions. Second operand has 22 states, 22 states have (on average 8.318181818181818) internal successors, (183), 21 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:34:00,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:00,528 INFO L93 Difference]: Finished difference Result 50575 states and 66724 transitions. [2021-11-07 08:34:00,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-07 08:34:00,529 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 8.318181818181818) internal successors, (183), 21 states have internal predecessors, (183), 0 states have call successors, (0), 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 98 [2021-11-07 08:34:00,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:00,585 INFO L225 Difference]: With dead ends: 50575 [2021-11-07 08:34:00,585 INFO L226 Difference]: Without dead ends: 46787 [2021-11-07 08:34:00,598 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2764 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1483, Invalid=7447, Unknown=0, NotChecked=0, Total=8930 [2021-11-07 08:34:00,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46787 states. [2021-11-07 08:34:03,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46787 to 29527. [2021-11-07 08:34:03,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29527 states, 29525 states have (on average 1.3174597798475869) internal successors, (38898), 29526 states have internal predecessors, (38898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:34:03,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29527 states to 29527 states and 38898 transitions. [2021-11-07 08:34:03,741 INFO L78 Accepts]: Start accepts. Automaton has 29527 states and 38898 transitions. Word has length 98 [2021-11-07 08:34:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:03,742 INFO L470 AbstractCegarLoop]: Abstraction has 29527 states and 38898 transitions. [2021-11-07 08:34:03,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.318181818181818) internal successors, (183), 21 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:34:03,742 INFO L276 IsEmpty]: Start isEmpty. Operand 29527 states and 38898 transitions. [2021-11-07 08:34:03,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 08:34:03,745 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:03,745 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:03,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:03,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-07 08:34:03,946 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:34:03,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:03,947 INFO L85 PathProgramCache]: Analyzing trace with hash 730184847, now seen corresponding path program 1 times [2021-11-07 08:34:03,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:03,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364491964] [2021-11-07 08:34:03,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:03,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 08:34:04,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:04,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364491964] [2021-11-07 08:34:04,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364491964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:34:04,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:34:04,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:34:04,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191903246] [2021-11-07 08:34:04,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:34:04,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:04,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:34:04,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:34:04,029 INFO L87 Difference]: Start difference. First operand 29527 states and 38898 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:34:06,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:06,301 INFO L93 Difference]: Finished difference Result 49004 states and 64246 transitions. [2021-11-07 08:34:06,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:34:06,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 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 98 [2021-11-07 08:34:06,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:06,323 INFO L225 Difference]: With dead ends: 49004 [2021-11-07 08:34:06,324 INFO L226 Difference]: Without dead ends: 22339 [2021-11-07 08:34:06,337 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:34:06,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22339 states. [2021-11-07 08:34:08,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22339 to 22339. [2021-11-07 08:34:08,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22339 states, 22337 states have (on average 1.3013385862022653) internal successors, (29068), 22338 states have internal predecessors, (29068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:34:08,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22339 states to 22339 states and 29068 transitions. [2021-11-07 08:34:08,242 INFO L78 Accepts]: Start accepts. Automaton has 22339 states and 29068 transitions. Word has length 98 [2021-11-07 08:34:08,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:08,242 INFO L470 AbstractCegarLoop]: Abstraction has 22339 states and 29068 transitions. [2021-11-07 08:34:08,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:34:08,242 INFO L276 IsEmpty]: Start isEmpty. Operand 22339 states and 29068 transitions. [2021-11-07 08:34:08,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 08:34:08,244 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:08,245 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:08,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-07 08:34:08,245 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:34:08,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:08,246 INFO L85 PathProgramCache]: Analyzing trace with hash 89614703, now seen corresponding path program 1 times [2021-11-07 08:34:08,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:08,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325727083] [2021-11-07 08:34:08,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:08,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 08:34:08,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:08,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325727083] [2021-11-07 08:34:08,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325727083] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:34:08,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:34:08,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:34:08,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238435080] [2021-11-07 08:34:08,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:34:08,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:08,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:34:08,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:34:08,324 INFO L87 Difference]: Start difference. First operand 22339 states and 29068 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:34:10,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:10,052 INFO L93 Difference]: Finished difference Result 37277 states and 48201 transitions. [2021-11-07 08:34:10,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:34:10,053 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 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 98 [2021-11-07 08:34:10,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:10,073 INFO L225 Difference]: With dead ends: 37277 [2021-11-07 08:34:10,074 INFO L226 Difference]: Without dead ends: 17438 [2021-11-07 08:34:10,091 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:34:10,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17438 states. [2021-11-07 08:34:11,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17438 to 17438. [2021-11-07 08:34:11,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17438 states, 17436 states have (on average 1.293415921082817) internal successors, (22552), 17437 states have internal predecessors, (22552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:34:11,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17438 states to 17438 states and 22552 transitions. [2021-11-07 08:34:11,819 INFO L78 Accepts]: Start accepts. Automaton has 17438 states and 22552 transitions. Word has length 98 [2021-11-07 08:34:11,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:11,819 INFO L470 AbstractCegarLoop]: Abstraction has 17438 states and 22552 transitions. [2021-11-07 08:34:11,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:34:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand 17438 states and 22552 transitions. [2021-11-07 08:34:11,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 08:34:11,822 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:11,822 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:11,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-07 08:34:11,822 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:34:11,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:11,823 INFO L85 PathProgramCache]: Analyzing trace with hash 567553615, now seen corresponding path program 1 times [2021-11-07 08:34:11,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:11,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138980758] [2021-11-07 08:34:11,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:11,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:11,889 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:34:11,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:11,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138980758] [2021-11-07 08:34:11,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138980758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:34:11,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:34:11,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:34:11,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265212367] [2021-11-07 08:34:11,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:34:11,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:11,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:34:11,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:34:11,892 INFO L87 Difference]: Start difference. First operand 17438 states and 22552 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:34:13,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:13,190 INFO L93 Difference]: Finished difference Result 29228 states and 37505 transitions. [2021-11-07 08:34:13,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:34:13,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 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 98 [2021-11-07 08:34:13,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:13,207 INFO L225 Difference]: With dead ends: 29228 [2021-11-07 08:34:13,207 INFO L226 Difference]: Without dead ends: 14154 [2021-11-07 08:34:13,217 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:34:13,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14154 states. [2021-11-07 08:34:14,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14154 to 14154. [2021-11-07 08:34:14,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14154 states, 14152 states have (on average 1.2933154324477105) internal successors, (18303), 14153 states have internal predecessors, (18303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:34:14,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14154 states to 14154 states and 18303 transitions. [2021-11-07 08:34:14,891 INFO L78 Accepts]: Start accepts. Automaton has 14154 states and 18303 transitions. Word has length 98 [2021-11-07 08:34:14,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:14,892 INFO L470 AbstractCegarLoop]: Abstraction has 14154 states and 18303 transitions. [2021-11-07 08:34:14,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:34:14,892 INFO L276 IsEmpty]: Start isEmpty. Operand 14154 states and 18303 transitions. [2021-11-07 08:34:14,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 08:34:14,895 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:14,896 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:14,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-07 08:34:14,897 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:34:14,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:14,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1199123718, now seen corresponding path program 1 times [2021-11-07 08:34:14,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:14,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520812447] [2021-11-07 08:34:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:14,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:34:15,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:15,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520812447] [2021-11-07 08:34:15,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520812447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:15,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196530164] [2021-11-07 08:34:15,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:15,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:15,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:15,114 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:15,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:34:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:15,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 08:34:15,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:16,927 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:34:16,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196530164] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:16,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:16,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-07 08:34:16,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271842562] [2021-11-07 08:34:16,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 08:34:16,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:16,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 08:34:16,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:34:16,930 INFO L87 Difference]: Start difference. First operand 14154 states and 18303 transitions. Second operand has 18 states, 18 states have (on average 9.666666666666666) internal successors, (174), 17 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:34:33,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:33,603 INFO L93 Difference]: Finished difference Result 114015 states and 145054 transitions. [2021-11-07 08:34:33,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 08:34:33,604 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.666666666666666) internal successors, (174), 17 states have internal predecessors, (174), 0 states have call successors, (0), 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 [2021-11-07 08:34:33,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:33,797 INFO L225 Difference]: With dead ends: 114015 [2021-11-07 08:34:33,797 INFO L226 Difference]: Without dead ends: 102638 [2021-11-07 08:34:33,831 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=742, Invalid=3040, Unknown=0, NotChecked=0, Total=3782 [2021-11-07 08:34:33,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102638 states. [2021-11-07 08:34:43,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102638 to 67348. [2021-11-07 08:34:43,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67348 states, 67346 states have (on average 1.2443203753749295) internal successors, (83800), 67347 states have internal predecessors, (83800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:34:43,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67348 states to 67348 states and 83800 transitions. [2021-11-07 08:34:43,882 INFO L78 Accepts]: Start accepts. Automaton has 67348 states and 83800 transitions. Word has length 99 [2021-11-07 08:34:43,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:43,882 INFO L470 AbstractCegarLoop]: Abstraction has 67348 states and 83800 transitions. [2021-11-07 08:34:43,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.666666666666666) internal successors, (174), 17 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:34:43,883 INFO L276 IsEmpty]: Start isEmpty. Operand 67348 states and 83800 transitions. [2021-11-07 08:34:43,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 08:34:43,886 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:43,886 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:43,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:44,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6595632c-b78a-441e-9b98-b7d2102f94ac/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 08:34:44,087 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:34:44,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:44,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1535817218, now seen corresponding path program 1 times [2021-11-07 08:34:44,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:44,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335475226] [2021-11-07 08:34:44,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:44,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 08:34:44,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:44,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335475226] [2021-11-07 08:34:44,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335475226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:34:44,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:34:44,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:34:44,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786909546] [2021-11-07 08:34:44,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:34:44,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:44,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:34:44,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:34:44,407 INFO L87 Difference]: Start difference. First operand 67348 states and 83800 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)