./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec8_product28.cil.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_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/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_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/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_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/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 459b394196a1606fd18d87736056d8c2e811f354c9c1071577c3ccd936910200 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:43:02,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:43:02,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:43:02,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:43:02,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:43:02,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:43:02,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:43:02,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:43:02,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:43:02,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:43:02,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:43:02,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:43:02,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:43:02,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:43:02,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:43:02,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:43:02,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:43:02,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:43:02,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:43:02,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:43:02,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:43:02,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:43:02,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:43:02,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:43:02,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:43:02,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:43:02,466 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:43:02,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:43:02,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:43:02,471 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:43:02,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:43:02,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:43:02,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:43:02,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:43:02,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:43:02,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:43:02,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:43:02,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:43:02,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:43:02,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:43:02,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:43:02,483 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:43:02,532 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:43:02,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:43:02,533 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:43:02,534 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:43:02,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:43:02,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:43:02,543 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:43:02,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:43:02,544 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:43:02,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:43:02,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:43:02,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:43:02,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:43:02,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:43:02,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:43:02,547 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:43:02,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:43:02,547 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:43:02,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:43:02,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:43:02,548 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:43:02,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:43:02,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:43:02,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:43:02,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:43:02,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:43:02,550 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:43:02,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:43:02,550 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:43:02,552 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:43:02,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:43:02,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:43:02,553 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_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 459b394196a1606fd18d87736056d8c2e811f354c9c1071577c3ccd936910200 [2021-11-07 07:43:02,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:43:03,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:43:03,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:43:03,037 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:43:03,038 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:43:03,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/product-lines/email_spec8_product28.cil.c [2021-11-07 07:43:03,123 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/data/ff929e46c/6d86d179f1954ecb870a20d243c3cfed/FLAG67f342198 [2021-11-07 07:43:03,967 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:43:03,968 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/sv-benchmarks/c/product-lines/email_spec8_product28.cil.c [2021-11-07 07:43:04,003 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/data/ff929e46c/6d86d179f1954ecb870a20d243c3cfed/FLAG67f342198 [2021-11-07 07:43:04,147 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/data/ff929e46c/6d86d179f1954ecb870a20d243c3cfed [2021-11-07 07:43:04,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:43:04,152 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:43:04,153 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:43:04,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:43:04,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:43:04,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:43:04" (1/1) ... [2021-11-07 07:43:04,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2148a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:04, skipping insertion in model container [2021-11-07 07:43:04,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:43:04" (1/1) ... [2021-11-07 07:43:04,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:43:04,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:43:04,775 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_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/sv-benchmarks/c/product-lines/email_spec8_product28.cil.c[29342,29355] [2021-11-07 07:43:04,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:43:05,024 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:43:05,098 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_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/sv-benchmarks/c/product-lines/email_spec8_product28.cil.c[29342,29355] [2021-11-07 07:43:05,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:43:05,178 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:43:05,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:05 WrapperNode [2021-11-07 07:43:05,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:43:05,181 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:43:05,181 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:43:05,181 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:43:05,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:05" (1/1) ... [2021-11-07 07:43:05,236 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:05" (1/1) ... [2021-11-07 07:43:05,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:43:05,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:43:05,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:43:05,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:43:05,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:05" (1/1) ... [2021-11-07 07:43:05,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:05" (1/1) ... [2021-11-07 07:43:05,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:05" (1/1) ... [2021-11-07 07:43:05,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:05" (1/1) ... [2021-11-07 07:43:05,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:05" (1/1) ... [2021-11-07 07:43:05,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:05" (1/1) ... [2021-11-07 07:43:05,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:05" (1/1) ... [2021-11-07 07:43:05,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:43:05,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:43:05,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:43:05,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:43:05,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:05" (1/1) ... [2021-11-07 07:43:05,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:43:05,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:05,497 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:43:05,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:43:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 07:43:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:43:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:43:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:43:05,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:43:07,843 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:43:07,843 INFO L299 CfgBuilder]: Removed 295 assume(true) statements. [2021-11-07 07:43:07,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:43:07 BoogieIcfgContainer [2021-11-07 07:43:07,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:43:07,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:43:07,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:43:07,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:43:07,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:43:04" (1/3) ... [2021-11-07 07:43:07,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aeb786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:43:07, skipping insertion in model container [2021-11-07 07:43:07,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:05" (2/3) ... [2021-11-07 07:43:07,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aeb786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:43:07, skipping insertion in model container [2021-11-07 07:43:07,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:43:07" (3/3) ... [2021-11-07 07:43:07,857 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec8_product28.cil.c [2021-11-07 07:43:07,866 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:43:07,866 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 07:43:07,934 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:43:07,942 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 07:43:07,943 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 07:43:07,980 INFO L276 IsEmpty]: Start isEmpty. Operand has 477 states, 474 states have (on average 1.761603375527426) internal successors, (835), 476 states have internal predecessors, (835), 0 states have call successors, (0), 0 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 07:43:08,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 07:43:08,003 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:08,003 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] [2021-11-07 07:43:08,004 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:08,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:08,010 INFO L85 PathProgramCache]: Analyzing trace with hash 688116892, now seen corresponding path program 1 times [2021-11-07 07:43:08,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:08,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730141470] [2021-11-07 07:43:08,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:08,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:08,503 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 07:43:08,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:08,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730141470] [2021-11-07 07:43:08,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730141470] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:08,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:08,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:43:08,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750841110] [2021-11-07 07:43:08,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:43:08,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:08,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:43:08,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:43:08,534 INFO L87 Difference]: Start difference. First operand has 477 states, 474 states have (on average 1.761603375527426) internal successors, (835), 476 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 07:43:08,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:08,706 INFO L93 Difference]: Finished difference Result 1396 states and 2447 transitions. [2021-11-07 07:43:08,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:43:08,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-11-07 07:43:08,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:08,757 INFO L225 Difference]: With dead ends: 1396 [2021-11-07 07:43:08,757 INFO L226 Difference]: Without dead ends: 794 [2021-11-07 07:43:08,763 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 07:43:08,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-11-07 07:43:08,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 406. [2021-11-07 07:43:08,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 404 states have (on average 1.7524752475247525) internal successors, (708), 405 states have internal predecessors, (708), 0 states have call successors, (0), 0 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 07:43:08,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 708 transitions. [2021-11-07 07:43:08,887 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 708 transitions. Word has length 45 [2021-11-07 07:43:08,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:08,887 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 708 transitions. [2021-11-07 07:43:08,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 07:43:08,888 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 708 transitions. [2021-11-07 07:43:08,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 07:43:08,894 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:08,894 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] [2021-11-07 07:43:08,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:43:08,895 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:08,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:08,896 INFO L85 PathProgramCache]: Analyzing trace with hash 469504618, now seen corresponding path program 1 times [2021-11-07 07:43:08,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:08,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608781077] [2021-11-07 07:43:08,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:08,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:09,093 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 07:43:09,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:09,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608781077] [2021-11-07 07:43:09,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608781077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:09,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:09,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:43:09,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865475387] [2021-11-07 07:43:09,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:43:09,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:09,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:43:09,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:43:09,098 INFO L87 Difference]: Start difference. First operand 406 states and 708 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 07:43:09,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:09,381 INFO L93 Difference]: Finished difference Result 1167 states and 2040 transitions. [2021-11-07 07:43:09,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:43:09,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-11-07 07:43:09,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:09,403 INFO L225 Difference]: With dead ends: 1167 [2021-11-07 07:43:09,404 INFO L226 Difference]: Without dead ends: 780 [2021-11-07 07:43:09,409 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:43:09,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-11-07 07:43:09,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 406. [2021-11-07 07:43:09,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 404 states have (on average 1.75) internal successors, (707), 405 states have internal predecessors, (707), 0 states have call successors, (0), 0 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 07:43:09,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 707 transitions. [2021-11-07 07:43:09,465 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 707 transitions. Word has length 47 [2021-11-07 07:43:09,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:09,466 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 707 transitions. [2021-11-07 07:43:09,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 07:43:09,466 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 707 transitions. [2021-11-07 07:43:09,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 07:43:09,471 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:09,471 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] [2021-11-07 07:43:09,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:43:09,472 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:09,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:09,475 INFO L85 PathProgramCache]: Analyzing trace with hash -442595459, now seen corresponding path program 1 times [2021-11-07 07:43:09,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:09,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692297828] [2021-11-07 07:43:09,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:09,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:09,693 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 07:43:09,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:09,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692297828] [2021-11-07 07:43:09,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692297828] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:09,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:09,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:43:09,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610431579] [2021-11-07 07:43:09,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:43:09,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:09,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:43:09,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:43:09,704 INFO L87 Difference]: Start difference. First operand 406 states and 707 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 07:43:09,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:09,768 INFO L93 Difference]: Finished difference Result 794 states and 1388 transitions. [2021-11-07 07:43:09,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:43:09,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-11-07 07:43:09,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:09,772 INFO L225 Difference]: With dead ends: 794 [2021-11-07 07:43:09,773 INFO L226 Difference]: Without dead ends: 411 [2021-11-07 07:43:09,774 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 07:43:09,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-11-07 07:43:09,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 406. [2021-11-07 07:43:09,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 404 states have (on average 1.7425742574257426) internal successors, (704), 405 states have internal predecessors, (704), 0 states have call successors, (0), 0 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 07:43:09,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 704 transitions. [2021-11-07 07:43:09,793 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 704 transitions. Word has length 48 [2021-11-07 07:43:09,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:09,793 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 704 transitions. [2021-11-07 07:43:09,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 07:43:09,794 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 704 transitions. [2021-11-07 07:43:09,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 07:43:09,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:09,796 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] [2021-11-07 07:43:09,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:43:09,797 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:09,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:09,798 INFO L85 PathProgramCache]: Analyzing trace with hash -448494910, now seen corresponding path program 1 times [2021-11-07 07:43:09,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:09,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514982064] [2021-11-07 07:43:09,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:09,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:09,923 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 07:43:09,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:09,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514982064] [2021-11-07 07:43:09,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514982064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:09,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:09,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:43:09,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543795141] [2021-11-07 07:43:09,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:43:09,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:09,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:43:09,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:43:09,926 INFO L87 Difference]: Start difference. First operand 406 states and 704 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 07:43:10,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:10,077 INFO L93 Difference]: Finished difference Result 1157 states and 2020 transitions. [2021-11-07 07:43:10,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:43:10,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-11-07 07:43:10,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:10,087 INFO L225 Difference]: With dead ends: 1157 [2021-11-07 07:43:10,087 INFO L226 Difference]: Without dead ends: 778 [2021-11-07 07:43:10,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:43:10,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-11-07 07:43:10,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 406. [2021-11-07 07:43:10,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 404 states have (on average 1.74009900990099) internal successors, (703), 405 states have internal predecessors, (703), 0 states have call successors, (0), 0 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 07:43:10,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 703 transitions. [2021-11-07 07:43:10,129 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 703 transitions. Word has length 50 [2021-11-07 07:43:10,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:10,130 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 703 transitions. [2021-11-07 07:43:10,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 07:43:10,130 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 703 transitions. [2021-11-07 07:43:10,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 07:43:10,131 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:10,132 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] [2021-11-07 07:43:10,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:43:10,132 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:10,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:10,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1854809023, now seen corresponding path program 1 times [2021-11-07 07:43:10,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:10,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983362899] [2021-11-07 07:43:10,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:10,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:10,221 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 07:43:10,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:10,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983362899] [2021-11-07 07:43:10,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983362899] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:10,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:10,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:43:10,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958490874] [2021-11-07 07:43:10,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:43:10,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:10,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:43:10,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:43:10,224 INFO L87 Difference]: Start difference. First operand 406 states and 703 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 07:43:10,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:10,381 INFO L93 Difference]: Finished difference Result 1162 states and 2024 transitions. [2021-11-07 07:43:10,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:43:10,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-11-07 07:43:10,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:10,388 INFO L225 Difference]: With dead ends: 1162 [2021-11-07 07:43:10,388 INFO L226 Difference]: Without dead ends: 783 [2021-11-07 07:43:10,389 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 07:43:10,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-11-07 07:43:10,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 406. [2021-11-07 07:43:10,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 404 states have (on average 1.7376237623762376) internal successors, (702), 405 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:10,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 702 transitions. [2021-11-07 07:43:10,417 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 702 transitions. Word has length 51 [2021-11-07 07:43:10,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:10,418 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 702 transitions. [2021-11-07 07:43:10,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 07:43:10,418 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 702 transitions. [2021-11-07 07:43:10,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 07:43:10,420 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:10,420 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] [2021-11-07 07:43:10,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 07:43:10,420 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:10,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:10,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1996786599, now seen corresponding path program 1 times [2021-11-07 07:43:10,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:10,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728036650] [2021-11-07 07:43:10,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:10,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:10,488 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 07:43:10,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:10,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728036650] [2021-11-07 07:43:10,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728036650] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:10,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:10,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:43:10,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417398771] [2021-11-07 07:43:10,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:43:10,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:10,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:43:10,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:43:10,491 INFO L87 Difference]: Start difference. First operand 406 states and 702 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 07:43:10,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:10,522 INFO L93 Difference]: Finished difference Result 578 states and 987 transitions. [2021-11-07 07:43:10,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:43:10,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-11-07 07:43:10,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:10,532 INFO L225 Difference]: With dead ends: 578 [2021-11-07 07:43:10,532 INFO L226 Difference]: Without dead ends: 409 [2021-11-07 07:43:10,533 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 07:43:10,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-11-07 07:43:10,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 408. [2021-11-07 07:43:10,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 406 states have (on average 1.7339901477832513) internal successors, (704), 407 states have internal predecessors, (704), 0 states have call successors, (0), 0 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 07:43:10,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 704 transitions. [2021-11-07 07:43:10,558 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 704 transitions. Word has length 52 [2021-11-07 07:43:10,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:10,559 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 704 transitions. [2021-11-07 07:43:10,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 07:43:10,560 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 704 transitions. [2021-11-07 07:43:10,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 07:43:10,561 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:10,562 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 07:43:10,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 07:43:10,562 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:10,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:10,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1931007639, now seen corresponding path program 1 times [2021-11-07 07:43:10,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:10,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127380837] [2021-11-07 07:43:10,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:10,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:10,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:10,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127380837] [2021-11-07 07:43:10,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127380837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:10,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:10,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:43:10,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272802831] [2021-11-07 07:43:10,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:43:10,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:10,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:43:10,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:43:10,692 INFO L87 Difference]: Start difference. First operand 408 states and 704 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 07:43:10,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:10,753 INFO L93 Difference]: Finished difference Result 1110 states and 1936 transitions. [2021-11-07 07:43:10,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:43:10,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-11-07 07:43:10,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:10,759 INFO L225 Difference]: With dead ends: 1110 [2021-11-07 07:43:10,759 INFO L226 Difference]: Without dead ends: 733 [2021-11-07 07:43:10,761 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 07:43:10,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-11-07 07:43:10,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 564. [2021-11-07 07:43:10,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 562 states have (on average 1.7615658362989324) internal successors, (990), 563 states have internal predecessors, (990), 0 states have call successors, (0), 0 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 07:43:10,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 990 transitions. [2021-11-07 07:43:10,802 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 990 transitions. Word has length 58 [2021-11-07 07:43:10,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:10,804 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 990 transitions. [2021-11-07 07:43:10,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 07:43:10,805 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 990 transitions. [2021-11-07 07:43:10,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 07:43:10,807 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:10,807 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:10,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 07:43:10,807 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:10,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:10,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1877663274, now seen corresponding path program 1 times [2021-11-07 07:43:10,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:10,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974956903] [2021-11-07 07:43:10,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:10,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:10,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:10,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974956903] [2021-11-07 07:43:10,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974956903] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:10,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130547550] [2021-11-07 07:43:10,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:10,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:10,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:10,932 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:10,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:43:11,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:11,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:43:11,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:11,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:43:11,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130547550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:11,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:43:11,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-07 07:43:11,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004710052] [2021-11-07 07:43:11,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:43:11,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:11,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:43:11,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:43:11,541 INFO L87 Difference]: Start difference. First operand 564 states and 990 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 07:43:11,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:11,579 INFO L93 Difference]: Finished difference Result 680 states and 1182 transitions. [2021-11-07 07:43:11,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:43:11,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 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 59 [2021-11-07 07:43:11,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:11,597 INFO L225 Difference]: With dead ends: 680 [2021-11-07 07:43:11,597 INFO L226 Difference]: Without dead ends: 558 [2021-11-07 07:43:11,598 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:43:11,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-07 07:43:11,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2021-11-07 07:43:11,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 1.7612208258527828) internal successors, (981), 557 states have internal predecessors, (981), 0 states have call successors, (0), 0 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 07:43:11,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 981 transitions. [2021-11-07 07:43:11,638 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 981 transitions. Word has length 59 [2021-11-07 07:43:11,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:11,638 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 981 transitions. [2021-11-07 07:43:11,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 07:43:11,639 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 981 transitions. [2021-11-07 07:43:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 07:43:11,641 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:11,642 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:11,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:11,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-07 07:43:11,863 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:11,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:11,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1966553613, now seen corresponding path program 1 times [2021-11-07 07:43:11,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:11,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238690928] [2021-11-07 07:43:11,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:11,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:11,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:11,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238690928] [2021-11-07 07:43:11,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238690928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:11,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909535529] [2021-11-07 07:43:11,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:11,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:11,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:11,959 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:11,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:43:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:12,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:43:12,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:12,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:12,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909535529] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:12,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:43:12,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-07 07:43:12,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090207897] [2021-11-07 07:43:12,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:43:12,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:12,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:43:12,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:43:12,552 INFO L87 Difference]: Start difference. First operand 558 states and 981 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:12,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:12,626 INFO L93 Difference]: Finished difference Result 1096 states and 1912 transitions. [2021-11-07 07:43:12,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:43:12,627 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-07 07:43:12,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:12,634 INFO L225 Difference]: With dead ends: 1096 [2021-11-07 07:43:12,634 INFO L226 Difference]: Without dead ends: 933 [2021-11-07 07:43:12,635 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:43:12,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-11-07 07:43:12,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 768. [2021-11-07 07:43:12,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 1.7783572359843547) internal successors, (1364), 767 states have internal predecessors, (1364), 0 states have call successors, (0), 0 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 07:43:12,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1364 transitions. [2021-11-07 07:43:12,708 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1364 transitions. Word has length 96 [2021-11-07 07:43:12,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:12,709 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 1364 transitions. [2021-11-07 07:43:12,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:12,709 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1364 transitions. [2021-11-07 07:43:12,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 07:43:12,712 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:12,712 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:12,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:12,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:12,928 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:12,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:12,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1486460544, now seen corresponding path program 1 times [2021-11-07 07:43:12,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:12,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590476917] [2021-11-07 07:43:12,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:12,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:13,006 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 07:43:13,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:13,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590476917] [2021-11-07 07:43:13,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590476917] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:13,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:13,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:43:13,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111007629] [2021-11-07 07:43:13,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:43:13,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:13,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:43:13,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:43:13,011 INFO L87 Difference]: Start difference. First operand 768 states and 1364 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 07:43:13,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:13,122 INFO L93 Difference]: Finished difference Result 1974 states and 3523 transitions. [2021-11-07 07:43:13,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:43:13,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 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 102 [2021-11-07 07:43:13,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:13,133 INFO L225 Difference]: With dead ends: 1974 [2021-11-07 07:43:13,133 INFO L226 Difference]: Without dead ends: 1295 [2021-11-07 07:43:13,135 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 07:43:13,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-11-07 07:43:13,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 1132. [2021-11-07 07:43:13,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 1.793103448275862) internal successors, (2028), 1131 states have internal predecessors, (2028), 0 states have call successors, (0), 0 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 07:43:13,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 2028 transitions. [2021-11-07 07:43:13,216 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 2028 transitions. Word has length 102 [2021-11-07 07:43:13,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:13,217 INFO L470 AbstractCegarLoop]: Abstraction has 1132 states and 2028 transitions. [2021-11-07 07:43:13,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 07:43:13,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 2028 transitions. [2021-11-07 07:43:13,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 07:43:13,221 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:13,221 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:13,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 07:43:13,222 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:13,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:13,223 INFO L85 PathProgramCache]: Analyzing trace with hash -877784048, now seen corresponding path program 2 times [2021-11-07 07:43:13,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:13,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057824106] [2021-11-07 07:43:13,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:13,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:13,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:13,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057824106] [2021-11-07 07:43:13,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057824106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:13,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:13,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:43:13,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971692936] [2021-11-07 07:43:13,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:43:13,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:13,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:43:13,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:43:13,340 INFO L87 Difference]: Start difference. First operand 1132 states and 2028 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 07:43:13,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:13,456 INFO L93 Difference]: Finished difference Result 2184 states and 3904 transitions. [2021-11-07 07:43:13,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:43:13,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2021-11-07 07:43:13,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:13,467 INFO L225 Difference]: With dead ends: 2184 [2021-11-07 07:43:13,468 INFO L226 Difference]: Without dead ends: 1295 [2021-11-07 07:43:13,470 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 07:43:13,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-11-07 07:43:13,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 1132. [2021-11-07 07:43:13,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 1.7913351016799293) internal successors, (2026), 1131 states have internal predecessors, (2026), 0 states have call successors, (0), 0 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 07:43:13,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 2026 transitions. [2021-11-07 07:43:13,555 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 2026 transitions. Word has length 103 [2021-11-07 07:43:13,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:13,556 INFO L470 AbstractCegarLoop]: Abstraction has 1132 states and 2026 transitions. [2021-11-07 07:43:13,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 07:43:13,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 2026 transitions. [2021-11-07 07:43:13,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 07:43:13,560 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:13,561 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:13,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 07:43:13,561 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:13,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:13,562 INFO L85 PathProgramCache]: Analyzing trace with hash 331248527, now seen corresponding path program 1 times [2021-11-07 07:43:13,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:13,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635293870] [2021-11-07 07:43:13,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:13,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:13,654 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 07:43:13,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:13,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635293870] [2021-11-07 07:43:13,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635293870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:13,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:13,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:43:13,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845546042] [2021-11-07 07:43:13,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:43:13,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:13,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:43:13,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:43:13,658 INFO L87 Difference]: Start difference. First operand 1132 states and 2026 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 07:43:13,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:13,781 INFO L93 Difference]: Finished difference Result 3038 states and 5464 transitions. [2021-11-07 07:43:13,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:43:13,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2021-11-07 07:43:13,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:13,798 INFO L225 Difference]: With dead ends: 3038 [2021-11-07 07:43:13,799 INFO L226 Difference]: Without dead ends: 2003 [2021-11-07 07:43:13,801 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 07:43:13,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2021-11-07 07:43:13,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1840. [2021-11-07 07:43:13,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 1.8036976617727025) internal successors, (3317), 1839 states have internal predecessors, (3317), 0 states have call successors, (0), 0 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 07:43:13,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 3317 transitions. [2021-11-07 07:43:13,934 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 3317 transitions. Word has length 103 [2021-11-07 07:43:13,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:13,935 INFO L470 AbstractCegarLoop]: Abstraction has 1840 states and 3317 transitions. [2021-11-07 07:43:13,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 07:43:13,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 3317 transitions. [2021-11-07 07:43:13,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 07:43:13,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:13,941 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:13,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 07:43:13,941 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:13,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:13,942 INFO L85 PathProgramCache]: Analyzing trace with hash 2066756546, now seen corresponding path program 1 times [2021-11-07 07:43:13,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:13,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779449385] [2021-11-07 07:43:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:13,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:14,025 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 07:43:14,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:14,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779449385] [2021-11-07 07:43:14,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779449385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:14,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:14,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:43:14,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571742945] [2021-11-07 07:43:14,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:43:14,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:14,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:43:14,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:43:14,029 INFO L87 Difference]: Start difference. First operand 1840 states and 3317 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 07:43:14,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:14,228 INFO L93 Difference]: Finished difference Result 4898 states and 8856 transitions. [2021-11-07 07:43:14,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:43:14,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 104 [2021-11-07 07:43:14,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:14,255 INFO L225 Difference]: With dead ends: 4898 [2021-11-07 07:43:14,256 INFO L226 Difference]: Without dead ends: 3189 [2021-11-07 07:43:14,260 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 07:43:14,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2021-11-07 07:43:14,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 3026. [2021-11-07 07:43:14,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3026 states, 3025 states have (on average 1.8095867768595042) internal successors, (5474), 3025 states have internal predecessors, (5474), 0 states have call successors, (0), 0 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 07:43:14,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3026 states to 3026 states and 5474 transitions. [2021-11-07 07:43:14,490 INFO L78 Accepts]: Start accepts. Automaton has 3026 states and 5474 transitions. Word has length 104 [2021-11-07 07:43:14,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:14,491 INFO L470 AbstractCegarLoop]: Abstraction has 3026 states and 5474 transitions. [2021-11-07 07:43:14,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 07:43:14,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states and 5474 transitions. [2021-11-07 07:43:14,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 07:43:14,500 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:14,500 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:14,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 07:43:14,501 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:14,501 INFO L85 PathProgramCache]: Analyzing trace with hash -423645344, now seen corresponding path program 1 times [2021-11-07 07:43:14,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:14,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951704170] [2021-11-07 07:43:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:14,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:14,575 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 07:43:14,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:14,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951704170] [2021-11-07 07:43:14,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951704170] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:14,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:14,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:43:14,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107229281] [2021-11-07 07:43:14,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:43:14,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:14,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:43:14,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:43:14,578 INFO L87 Difference]: Start difference. First operand 3026 states and 5474 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 07:43:14,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:14,880 INFO L93 Difference]: Finished difference Result 8172 states and 14810 transitions. [2021-11-07 07:43:14,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:43:14,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 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 105 [2021-11-07 07:43:14,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:14,917 INFO L225 Difference]: With dead ends: 8172 [2021-11-07 07:43:14,918 INFO L226 Difference]: Without dead ends: 5311 [2021-11-07 07:43:14,923 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 07:43:14,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5311 states. [2021-11-07 07:43:15,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5311 to 5148. [2021-11-07 07:43:15,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5148 states, 5147 states have (on average 1.8113464153876044) internal successors, (9323), 5147 states have internal predecessors, (9323), 0 states have call successors, (0), 0 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 07:43:15,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5148 states to 5148 states and 9323 transitions. [2021-11-07 07:43:15,320 INFO L78 Accepts]: Start accepts. Automaton has 5148 states and 9323 transitions. Word has length 105 [2021-11-07 07:43:15,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:15,321 INFO L470 AbstractCegarLoop]: Abstraction has 5148 states and 9323 transitions. [2021-11-07 07:43:15,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 07:43:15,321 INFO L276 IsEmpty]: Start isEmpty. Operand 5148 states and 9323 transitions. [2021-11-07 07:43:15,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 07:43:15,334 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:15,335 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:15,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 07:43:15,335 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:15,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:15,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1773703780, now seen corresponding path program 1 times [2021-11-07 07:43:15,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:15,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726120479] [2021-11-07 07:43:15,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:15,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 07:43:15,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:15,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726120479] [2021-11-07 07:43:15,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726120479] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:15,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:15,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:43:15,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859626400] [2021-11-07 07:43:15,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:43:15,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:15,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:43:15,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:43:15,424 INFO L87 Difference]: Start difference. First operand 5148 states and 9323 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 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 07:43:16,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:16,285 INFO L93 Difference]: Finished difference Result 14671 states and 26600 transitions. [2021-11-07 07:43:16,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:43:16,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 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 106 [2021-11-07 07:43:16,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:16,350 INFO L225 Difference]: With dead ends: 14671 [2021-11-07 07:43:16,350 INFO L226 Difference]: Without dead ends: 9766 [2021-11-07 07:43:16,361 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:43:16,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9766 states. [2021-11-07 07:43:16,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9766 to 5148. [2021-11-07 07:43:16,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5148 states, 5147 states have (on average 1.8016320186516417) internal successors, (9273), 5147 states have internal predecessors, (9273), 0 states have call successors, (0), 0 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 07:43:16,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5148 states to 5148 states and 9273 transitions. [2021-11-07 07:43:16,843 INFO L78 Accepts]: Start accepts. Automaton has 5148 states and 9273 transitions. Word has length 106 [2021-11-07 07:43:16,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:16,843 INFO L470 AbstractCegarLoop]: Abstraction has 5148 states and 9273 transitions. [2021-11-07 07:43:16,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 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 07:43:16,844 INFO L276 IsEmpty]: Start isEmpty. Operand 5148 states and 9273 transitions. [2021-11-07 07:43:16,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 07:43:16,894 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:16,894 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:16,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 07:43:16,895 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:16,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:16,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1465288115, now seen corresponding path program 1 times [2021-11-07 07:43:16,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:16,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256493521] [2021-11-07 07:43:16,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:16,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:16,959 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 07:43:16,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:16,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256493521] [2021-11-07 07:43:16,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256493521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:16,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:16,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:43:16,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663802133] [2021-11-07 07:43:16,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:43:16,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:16,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:43:16,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:43:16,962 INFO L87 Difference]: Start difference. First operand 5148 states and 9273 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 07:43:17,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:17,478 INFO L93 Difference]: Finished difference Result 14996 states and 27052 transitions. [2021-11-07 07:43:17,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:43:17,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-11-07 07:43:17,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:17,511 INFO L225 Difference]: With dead ends: 14996 [2021-11-07 07:43:17,512 INFO L226 Difference]: Without dead ends: 10017 [2021-11-07 07:43:17,521 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 07:43:17,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10017 states. [2021-11-07 07:43:18,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10017 to 9854. [2021-11-07 07:43:18,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9854 states, 9853 states have (on average 1.801887749923881) internal successors, (17754), 9853 states have internal predecessors, (17754), 0 states have call successors, (0), 0 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 07:43:18,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9854 states to 9854 states and 17754 transitions. [2021-11-07 07:43:18,193 INFO L78 Accepts]: Start accepts. Automaton has 9854 states and 17754 transitions. Word has length 106 [2021-11-07 07:43:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:18,193 INFO L470 AbstractCegarLoop]: Abstraction has 9854 states and 17754 transitions. [2021-11-07 07:43:18,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 07:43:18,193 INFO L276 IsEmpty]: Start isEmpty. Operand 9854 states and 17754 transitions. [2021-11-07 07:43:18,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-07 07:43:18,215 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:18,215 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:18,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 07:43:18,215 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:18,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:18,216 INFO L85 PathProgramCache]: Analyzing trace with hash 365857439, now seen corresponding path program 1 times [2021-11-07 07:43:18,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:18,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648295250] [2021-11-07 07:43:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:18,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 07:43:18,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:18,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648295250] [2021-11-07 07:43:18,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648295250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:18,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:18,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 07:43:18,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414970271] [2021-11-07 07:43:18,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:43:18,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:18,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:43:18,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:43:18,306 INFO L87 Difference]: Start difference. First operand 9854 states and 17754 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 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 07:43:19,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:19,484 INFO L93 Difference]: Finished difference Result 20110 states and 36178 transitions. [2021-11-07 07:43:19,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:43:19,485 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 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 107 [2021-11-07 07:43:19,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:19,537 INFO L225 Difference]: With dead ends: 20110 [2021-11-07 07:43:19,537 INFO L226 Difference]: Without dead ends: 19965 [2021-11-07 07:43:19,545 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:43:19,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19965 states. [2021-11-07 07:43:20,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19965 to 19656. [2021-11-07 07:43:20,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19656 states, 19655 states have (on average 1.8021368608496566) internal successors, (35421), 19655 states have internal predecessors, (35421), 0 states have call successors, (0), 0 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 07:43:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19656 states to 19656 states and 35421 transitions. [2021-11-07 07:43:20,769 INFO L78 Accepts]: Start accepts. Automaton has 19656 states and 35421 transitions. Word has length 107 [2021-11-07 07:43:20,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:20,770 INFO L470 AbstractCegarLoop]: Abstraction has 19656 states and 35421 transitions. [2021-11-07 07:43:20,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 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 07:43:20,770 INFO L276 IsEmpty]: Start isEmpty. Operand 19656 states and 35421 transitions. [2021-11-07 07:43:20,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 07:43:20,828 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:20,828 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:20,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 07:43:20,829 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:20,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:20,830 INFO L85 PathProgramCache]: Analyzing trace with hash 630742098, now seen corresponding path program 1 times [2021-11-07 07:43:20,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:20,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482461611] [2021-11-07 07:43:20,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:20,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:20,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 07:43:20,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:20,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482461611] [2021-11-07 07:43:20,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482461611] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:20,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:20,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:43:20,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208638578] [2021-11-07 07:43:20,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:43:20,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:20,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:43:20,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:43:20,919 INFO L87 Difference]: Start difference. First operand 19656 states and 35421 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 07:43:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:22,152 INFO L93 Difference]: Finished difference Result 38289 states and 69120 transitions. [2021-11-07 07:43:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:43:22,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 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 108 [2021-11-07 07:43:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:22,245 INFO L225 Difference]: With dead ends: 38289 [2021-11-07 07:43:22,245 INFO L226 Difference]: Without dead ends: 28445 [2021-11-07 07:43:22,269 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:43:22,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28445 states. [2021-11-07 07:43:23,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28445 to 19418. [2021-11-07 07:43:23,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19418 states, 19417 states have (on average 1.8031106762115672) internal successors, (35011), 19417 states have internal predecessors, (35011), 0 states have call successors, (0), 0 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 07:43:23,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19418 states to 19418 states and 35011 transitions. [2021-11-07 07:43:23,363 INFO L78 Accepts]: Start accepts. Automaton has 19418 states and 35011 transitions. Word has length 108 [2021-11-07 07:43:23,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:23,364 INFO L470 AbstractCegarLoop]: Abstraction has 19418 states and 35011 transitions. [2021-11-07 07:43:23,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 07:43:23,364 INFO L276 IsEmpty]: Start isEmpty. Operand 19418 states and 35011 transitions. [2021-11-07 07:43:23,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-07 07:43:23,405 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:23,405 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:23,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 07:43:23,406 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:23,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:23,406 INFO L85 PathProgramCache]: Analyzing trace with hash 766779628, now seen corresponding path program 1 times [2021-11-07 07:43:23,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:23,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111922763] [2021-11-07 07:43:23,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:23,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:23,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 07:43:23,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:23,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111922763] [2021-11-07 07:43:23,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111922763] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:23,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:23,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:43:23,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419334971] [2021-11-07 07:43:23,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:43:23,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:23,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:43:23,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:43:23,500 INFO L87 Difference]: Start difference. First operand 19418 states and 35011 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 07:43:24,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:24,499 INFO L93 Difference]: Finished difference Result 19840 states and 35712 transitions. [2021-11-07 07:43:24,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:43:24,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 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 109 [2021-11-07 07:43:24,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:24,549 INFO L225 Difference]: With dead ends: 19840 [2021-11-07 07:43:24,549 INFO L226 Difference]: Without dead ends: 19574 [2021-11-07 07:43:24,557 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 07:43:24,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19574 states. [2021-11-07 07:43:25,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19574 to 19412. [2021-11-07 07:43:25,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19412 states, 19411 states have (on average 1.8029982999330276) internal successors, (34998), 19411 states have internal predecessors, (34998), 0 states have call successors, (0), 0 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 07:43:25,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19412 states to 19412 states and 34998 transitions. [2021-11-07 07:43:25,682 INFO L78 Accepts]: Start accepts. Automaton has 19412 states and 34998 transitions. Word has length 109 [2021-11-07 07:43:25,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:25,683 INFO L470 AbstractCegarLoop]: Abstraction has 19412 states and 34998 transitions. [2021-11-07 07:43:25,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 07:43:25,683 INFO L276 IsEmpty]: Start isEmpty. Operand 19412 states and 34998 transitions. [2021-11-07 07:43:25,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-07 07:43:25,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:25,736 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:25,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 07:43:25,737 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:25,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:25,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1012696798, now seen corresponding path program 1 times [2021-11-07 07:43:25,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:25,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272142842] [2021-11-07 07:43:25,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:25,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 07:43:25,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:25,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272142842] [2021-11-07 07:43:25,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272142842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:25,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:25,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 07:43:25,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737731889] [2021-11-07 07:43:25,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:43:25,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:25,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:43:25,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:43:25,877 INFO L87 Difference]: Start difference. First operand 19412 states and 34998 transitions. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 07:43:29,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:29,551 INFO L93 Difference]: Finished difference Result 40100 states and 72062 transitions. [2021-11-07 07:43:29,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 07:43:29,552 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 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 111 [2021-11-07 07:43:29,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:29,633 INFO L225 Difference]: With dead ends: 40100 [2021-11-07 07:43:29,633 INFO L226 Difference]: Without dead ends: 39878 [2021-11-07 07:43:29,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:43:29,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39878 states. [2021-11-07 07:43:31,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39878 to 38630. [2021-11-07 07:43:31,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38630 states, 38629 states have (on average 1.8036449299748893) internal successors, (69673), 38629 states have internal predecessors, (69673), 0 states have call successors, (0), 0 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 07:43:31,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38630 states to 38630 states and 69673 transitions. [2021-11-07 07:43:31,327 INFO L78 Accepts]: Start accepts. Automaton has 38630 states and 69673 transitions. Word has length 111 [2021-11-07 07:43:31,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:31,328 INFO L470 AbstractCegarLoop]: Abstraction has 38630 states and 69673 transitions. [2021-11-07 07:43:31,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 07:43:31,328 INFO L276 IsEmpty]: Start isEmpty. Operand 38630 states and 69673 transitions. [2021-11-07 07:43:31,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 07:43:31,616 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:31,616 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:31,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 07:43:31,617 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:31,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:31,617 INFO L85 PathProgramCache]: Analyzing trace with hash -58339489, now seen corresponding path program 1 times [2021-11-07 07:43:31,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:31,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603855579] [2021-11-07 07:43:31,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:31,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:31,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 07:43:31,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:31,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603855579] [2021-11-07 07:43:31,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603855579] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:31,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:31,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:43:31,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143281036] [2021-11-07 07:43:31,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:43:31,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:31,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:43:31,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:43:31,707 INFO L87 Difference]: Start difference. First operand 38630 states and 69673 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 07:43:33,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:33,016 INFO L93 Difference]: Finished difference Result 38898 states and 70115 transitions. [2021-11-07 07:43:33,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:43:33,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 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 112 [2021-11-07 07:43:33,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:33,071 INFO L225 Difference]: With dead ends: 38898 [2021-11-07 07:43:33,071 INFO L226 Difference]: Without dead ends: 38628 [2021-11-07 07:43:33,078 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 07:43:33,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38628 states. [2021-11-07 07:43:34,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38628 to 38628. [2021-11-07 07:43:34,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38628 states, 38627 states have (on average 1.8035312087400006) internal successors, (69665), 38627 states have internal predecessors, (69665), 0 states have call successors, (0), 0 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 07:43:34,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38628 states to 38628 states and 69665 transitions. [2021-11-07 07:43:34,825 INFO L78 Accepts]: Start accepts. Automaton has 38628 states and 69665 transitions. Word has length 112 [2021-11-07 07:43:34,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:34,826 INFO L470 AbstractCegarLoop]: Abstraction has 38628 states and 69665 transitions. [2021-11-07 07:43:34,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 07:43:34,826 INFO L276 IsEmpty]: Start isEmpty. Operand 38628 states and 69665 transitions. [2021-11-07 07:43:34,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 07:43:34,875 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:34,876 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:34,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 07:43:34,876 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:34,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:34,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1966673289, now seen corresponding path program 1 times [2021-11-07 07:43:34,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:34,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202190005] [2021-11-07 07:43:34,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:34,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 07:43:34,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:34,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202190005] [2021-11-07 07:43:34,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202190005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:34,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:34,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:43:34,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488603466] [2021-11-07 07:43:34,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:43:34,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:34,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:43:34,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:43:34,951 INFO L87 Difference]: Start difference. First operand 38628 states and 69665 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 07:43:37,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:37,502 INFO L93 Difference]: Finished difference Result 58667 states and 105660 transitions. [2021-11-07 07:43:37,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:43:37,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 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 113 [2021-11-07 07:43:37,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:37,626 INFO L225 Difference]: With dead ends: 58667 [2021-11-07 07:43:37,626 INFO L226 Difference]: Without dead ends: 58442 [2021-11-07 07:43:37,638 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 07:43:37,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58442 states. [2021-11-07 07:43:40,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58442 to 57851. [2021-11-07 07:43:40,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57851 states, 57850 states have (on average 1.8036646499567848) internal successors, (104342), 57850 states have internal predecessors, (104342), 0 states have call successors, (0), 0 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 07:43:40,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57851 states to 57851 states and 104342 transitions. [2021-11-07 07:43:40,301 INFO L78 Accepts]: Start accepts. Automaton has 57851 states and 104342 transitions. Word has length 113 [2021-11-07 07:43:40,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:40,301 INFO L470 AbstractCegarLoop]: Abstraction has 57851 states and 104342 transitions. [2021-11-07 07:43:40,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 07:43:40,302 INFO L276 IsEmpty]: Start isEmpty. Operand 57851 states and 104342 transitions. [2021-11-07 07:43:40,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 07:43:40,357 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:40,358 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:40,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-07 07:43:40,358 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:40,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:40,359 INFO L85 PathProgramCache]: Analyzing trace with hash -789953977, now seen corresponding path program 1 times [2021-11-07 07:43:40,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:40,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989073646] [2021-11-07 07:43:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:40,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 07:43:40,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:40,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989073646] [2021-11-07 07:43:40,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989073646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:40,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:40,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 07:43:40,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742547457] [2021-11-07 07:43:40,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:43:40,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:40,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:43:40,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:43:40,519 INFO L87 Difference]: Start difference. First operand 57851 states and 104342 transitions. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 07:43:43,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:43,649 INFO L93 Difference]: Finished difference Result 59605 states and 107222 transitions. [2021-11-07 07:43:43,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 07:43:43,650 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 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 113 [2021-11-07 07:43:43,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:43,762 INFO L225 Difference]: With dead ends: 59605 [2021-11-07 07:43:43,762 INFO L226 Difference]: Without dead ends: 59156 [2021-11-07 07:43:43,776 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:43:43,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59156 states. [2021-11-07 07:43:46,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59156 to 57887. [2021-11-07 07:43:46,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57887 states, 57886 states have (on average 1.8033721452510105) internal successors, (104390), 57886 states have internal predecessors, (104390), 0 states have call successors, (0), 0 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 07:43:46,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57887 states to 57887 states and 104390 transitions. [2021-11-07 07:43:46,192 INFO L78 Accepts]: Start accepts. Automaton has 57887 states and 104390 transitions. Word has length 113 [2021-11-07 07:43:46,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:46,192 INFO L470 AbstractCegarLoop]: Abstraction has 57887 states and 104390 transitions. [2021-11-07 07:43:46,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 07:43:46,192 INFO L276 IsEmpty]: Start isEmpty. Operand 57887 states and 104390 transitions. [2021-11-07 07:43:46,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-07 07:43:46,247 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:46,248 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:46,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-07 07:43:46,248 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:46,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:46,249 INFO L85 PathProgramCache]: Analyzing trace with hash -2093178707, now seen corresponding path program 1 times [2021-11-07 07:43:46,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:46,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536110002] [2021-11-07 07:43:46,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:46,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 07:43:46,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:46,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536110002] [2021-11-07 07:43:46,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536110002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:46,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:46,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:43:46,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988299413] [2021-11-07 07:43:46,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:43:46,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:46,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:43:46,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:43:46,348 INFO L87 Difference]: Start difference. First operand 57887 states and 104390 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 07:43:48,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:48,897 INFO L93 Difference]: Finished difference Result 60357 states and 108366 transitions. [2021-11-07 07:43:48,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:43:48,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 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 114 [2021-11-07 07:43:48,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:48,986 INFO L225 Difference]: With dead ends: 60357 [2021-11-07 07:43:48,986 INFO L226 Difference]: Without dead ends: 60052 [2021-11-07 07:43:48,998 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:43:49,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60052 states. [2021-11-07 07:43:51,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60052 to 58175. [2021-11-07 07:43:51,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58175 states, 58174 states have (on average 1.8022828067521572) internal successors, (104846), 58174 states have internal predecessors, (104846), 0 states have call successors, (0), 0 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 07:43:51,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58175 states to 58175 states and 104846 transitions. [2021-11-07 07:43:51,582 INFO L78 Accepts]: Start accepts. Automaton has 58175 states and 104846 transitions. Word has length 114 [2021-11-07 07:43:51,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:51,582 INFO L470 AbstractCegarLoop]: Abstraction has 58175 states and 104846 transitions. [2021-11-07 07:43:51,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 07:43:51,583 INFO L276 IsEmpty]: Start isEmpty. Operand 58175 states and 104846 transitions. [2021-11-07 07:43:51,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-07 07:43:51,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:51,654 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:51,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-07 07:43:51,654 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:51,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:51,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1660238475, now seen corresponding path program 1 times [2021-11-07 07:43:51,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:51,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76203518] [2021-11-07 07:43:51,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:51,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:51,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:43:51,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:51,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76203518] [2021-11-07 07:43:51,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76203518] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:51,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109357767] [2021-11-07 07:43:51,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:51,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:51,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:51,769 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:51,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:43:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:52,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 1252 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 07:43:52,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:52,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109357767] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:52,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:43:52,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-11-07 07:43:52,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260416830] [2021-11-07 07:43:52,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:43:52,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:52,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:43:52,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:43:52,812 INFO L87 Difference]: Start difference. First operand 58175 states and 104846 transitions. Second operand has 9 states, 9 states have (on average 19.77777777777778) internal successors, (178), 9 states have internal predecessors, (178), 0 states have call successors, (0), 0 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 07:43:55,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:55,889 INFO L93 Difference]: Finished difference Result 66901 states and 119467 transitions. [2021-11-07 07:43:55,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 07:43:55,889 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.77777777777778) internal successors, (178), 9 states have internal predecessors, (178), 0 states have call successors, (0), 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 115 [2021-11-07 07:43:55,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:56,005 INFO L225 Difference]: With dead ends: 66901 [2021-11-07 07:43:56,005 INFO L226 Difference]: Without dead ends: 65786 [2021-11-07 07:43:56,018 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-11-07 07:43:56,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65786 states. [2021-11-07 07:43:58,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65786 to 61906. [2021-11-07 07:43:58,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61906 states, 61905 states have (on average 1.8004199983846216) internal successors, (111455), 61905 states have internal predecessors, (111455), 0 states have call successors, (0), 0 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 07:43:58,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61906 states to 61906 states and 111455 transitions. [2021-11-07 07:43:58,970 INFO L78 Accepts]: Start accepts. Automaton has 61906 states and 111455 transitions. Word has length 115 [2021-11-07 07:43:58,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:58,971 INFO L470 AbstractCegarLoop]: Abstraction has 61906 states and 111455 transitions. [2021-11-07 07:43:58,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.77777777777778) internal successors, (178), 9 states have internal predecessors, (178), 0 states have call successors, (0), 0 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 07:43:58,971 INFO L276 IsEmpty]: Start isEmpty. Operand 61906 states and 111455 transitions. [2021-11-07 07:43:59,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-07 07:43:59,040 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:59,040 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:59,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:59,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb062edb-fb19-4c8a-a5a1-f3a43fd3c69e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:59,252 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:59,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:59,252 INFO L85 PathProgramCache]: Analyzing trace with hash -963794634, now seen corresponding path program 1 times [2021-11-07 07:43:59,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:59,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726524741] [2021-11-07 07:43:59,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:59,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:59,323 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 07:43:59,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:59,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726524741] [2021-11-07 07:43:59,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726524741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:59,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:59,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:43:59,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736948255] [2021-11-07 07:43:59,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:43:59,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:59,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:43:59,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:43:59,326 INFO L87 Difference]: Start difference. First operand 61906 states and 111455 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)