./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec6_product21.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_034eb70d-4036-4468-96de-de8665ca6124/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_034eb70d-4036-4468-96de-de8665ca6124/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_034eb70d-4036-4468-96de-de8665ca6124/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_034eb70d-4036-4468-96de-de8665ca6124/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_034eb70d-4036-4468-96de-de8665ca6124/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_034eb70d-4036-4468-96de-de8665ca6124/bin/uautomizer-w2VwFs6gM0 --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 7cf7ce6a809409f6f4ca5aec26ee44d6ee6c1bd8459af1b8b074817ec65bb1ea --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 16:23:00,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 16:23:00,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 16:23:00,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 16:23:00,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 16:23:00,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 16:23:00,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 16:23:00,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 16:23:00,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 16:23:00,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 16:23:00,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 16:23:00,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 16:23:00,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 16:23:00,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 16:23:00,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 16:23:00,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 16:23:00,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 16:23:00,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 16:23:00,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 16:23:00,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 16:23:00,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 16:23:00,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 16:23:00,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 16:23:00,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 16:23:00,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 16:23:00,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 16:23:00,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 16:23:00,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 16:23:00,490 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 16:23:00,491 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 16:23:00,492 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 16:23:00,493 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 16:23:00,495 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 16:23:00,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 16:23:00,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 16:23:00,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 16:23:00,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 16:23:00,499 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 16:23:00,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 16:23:00,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 16:23:00,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 16:23:00,502 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_034eb70d-4036-4468-96de-de8665ca6124/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 16:23:00,548 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 16:23:00,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 16:23:00,549 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 16:23:00,549 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 16:23:00,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 16:23:00,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 16:23:00,558 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 16:23:00,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 16:23:00,558 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 16:23:00,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 16:23:00,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 16:23:00,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 16:23:00,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 16:23:00,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 16:23:00,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 16:23:00,561 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 16:23:00,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 16:23:00,561 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 16:23:00,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 16:23:00,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 16:23:00,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 16:23:00,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 16:23:00,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:23:00,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 16:23:00,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 16:23:00,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 16:23:00,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 16:23:00,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 16:23:00,564 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 16:23:00,565 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 16:23:00,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 16:23:00,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 16:23:00,566 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_034eb70d-4036-4468-96de-de8665ca6124/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_034eb70d-4036-4468-96de-de8665ca6124/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cf7ce6a809409f6f4ca5aec26ee44d6ee6c1bd8459af1b8b074817ec65bb1ea [2021-11-22 16:23:00,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 16:23:00,943 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 16:23:00,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 16:23:00,947 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 16:23:00,948 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 16:23:00,949 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_034eb70d-4036-4468-96de-de8665ca6124/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/product-lines/email_spec6_product21.cil.c [2021-11-22 16:23:01,028 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_034eb70d-4036-4468-96de-de8665ca6124/bin/uautomizer-w2VwFs6gM0/data/2bb3f327a/aa2ce59cd15844eb835bae8af50f7153/FLAGcaec1c262 [2021-11-22 16:23:01,705 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 16:23:01,706 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_034eb70d-4036-4468-96de-de8665ca6124/sv-benchmarks/c/product-lines/email_spec6_product21.cil.c [2021-11-22 16:23:01,743 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_034eb70d-4036-4468-96de-de8665ca6124/bin/uautomizer-w2VwFs6gM0/data/2bb3f327a/aa2ce59cd15844eb835bae8af50f7153/FLAGcaec1c262 [2021-11-22 16:23:01,935 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_034eb70d-4036-4468-96de-de8665ca6124/bin/uautomizer-w2VwFs6gM0/data/2bb3f327a/aa2ce59cd15844eb835bae8af50f7153 [2021-11-22 16:23:01,939 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 16:23:01,942 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 16:23:01,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 16:23:01,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 16:23:01,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 16:23:01,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:23:01" (1/1) ... [2021-11-22 16:23:01,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62538f39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:23:01, skipping insertion in model container [2021-11-22 16:23:01,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:23:01" (1/1) ... [2021-11-22 16:23:01,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 16:23:02,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:23:02,640 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_034eb70d-4036-4468-96de-de8665ca6124/sv-benchmarks/c/product-lines/email_spec6_product21.cil.c[54302,54315] [2021-11-22 16:23:02,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:23:02,717 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 16:23:02,822 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_034eb70d-4036-4468-96de-de8665ca6124/sv-benchmarks/c/product-lines/email_spec6_product21.cil.c[54302,54315] [2021-11-22 16:23:02,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:23:02,885 INFO L208 MainTranslator]: Completed translation [2021-11-22 16:23:02,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:23:02 WrapperNode [2021-11-22 16:23:02,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 16:23:02,887 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 16:23:02,887 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 16:23:02,887 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 16:23:02,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:23:02" (1/1) ... [2021-11-22 16:23:02,922 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:23:02" (1/1) ... [2021-11-22 16:23:03,077 INFO L137 Inliner]: procedures = 129, calls = 222, calls flagged for inlining = 128, calls inlined = 336, statements flattened = 5350 [2021-11-22 16:23:03,077 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 16:23:03,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 16:23:03,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 16:23:03,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 16:23:03,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:23:02" (1/1) ... [2021-11-22 16:23:03,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:23:02" (1/1) ... [2021-11-22 16:23:03,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:23:02" (1/1) ... [2021-11-22 16:23:03,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:23:02" (1/1) ... [2021-11-22 16:23:03,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:23:02" (1/1) ... [2021-11-22 16:23:03,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:23:02" (1/1) ... [2021-11-22 16:23:03,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:23:02" (1/1) ... [2021-11-22 16:23:03,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 16:23:03,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 16:23:03,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 16:23:03,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 16:23:03,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:23:02" (1/1) ... [2021-11-22 16:23:03,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:23:03,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_034eb70d-4036-4468-96de-de8665ca6124/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:23:03,324 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_034eb70d-4036-4468-96de-de8665ca6124/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 16:23:03,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_034eb70d-4036-4468-96de-de8665ca6124/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 16:23:03,368 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-22 16:23:03,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 16:23:03,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 16:23:03,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 16:23:03,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 16:23:03,637 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 16:23:03,639 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 16:23:05,800 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 16:23:05,828 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 16:23:05,828 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-22 16:23:05,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:23:05 BoogieIcfgContainer [2021-11-22 16:23:05,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 16:23:05,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 16:23:05,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 16:23:05,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 16:23:05,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 04:23:01" (1/3) ... [2021-11-22 16:23:05,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c6c0c72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:23:05, skipping insertion in model container [2021-11-22 16:23:05,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:23:02" (2/3) ... [2021-11-22 16:23:05,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c6c0c72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:23:05, skipping insertion in model container [2021-11-22 16:23:05,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:23:05" (3/3) ... [2021-11-22 16:23:05,846 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec6_product21.cil.c [2021-11-22 16:23:05,851 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 16:23:05,851 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-22 16:23:05,906 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 16:23:05,913 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 [2021-11-22 16:23:05,913 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-22 16:23:05,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 1090 states, 1083 states have (on average 1.6749769159741459) internal successors, (1814), 1089 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:05,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-22 16:23:05,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:05,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:05,970 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:23:05,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:05,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1837879633, now seen corresponding path program 1 times [2021-11-22 16:23:05,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:05,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810417385] [2021-11-22 16:23:05,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:05,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:23:06,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:06,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810417385] [2021-11-22 16:23:06,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810417385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:23:06,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:23:06,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:23:06,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606136763] [2021-11-22 16:23:06,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:23:06,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:23:06,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:06,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:23:06,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:06,305 INFO L87 Difference]: Start difference. First operand has 1090 states, 1083 states have (on average 1.6749769159741459) internal successors, (1814), 1089 states have internal predecessors, (1814), 0 states have call successors, (0), 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 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:06,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:06,667 INFO L93 Difference]: Finished difference Result 3217 states and 5366 transitions. [2021-11-22 16:23:06,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:23:06,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-22 16:23:06,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:06,753 INFO L225 Difference]: With dead ends: 3217 [2021-11-22 16:23:06,753 INFO L226 Difference]: Without dead ends: 1875 [2021-11-22 16:23:06,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:06,764 INFO L933 BasicCegarLoop]: 3559 mSDtfsCounter, 1775 mSDsluCounter, 1770 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1775 SdHoareTripleChecker+Valid, 5329 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:06,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1775 Valid, 5329 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:23:06,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-11-22 16:23:06,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 948. [2021-11-22 16:23:06,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 942 states have (on average 1.683651804670913) internal successors, (1586), 947 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1586 transitions. [2021-11-22 16:23:06,902 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1586 transitions. Word has length 60 [2021-11-22 16:23:06,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:06,903 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1586 transitions. [2021-11-22 16:23:06,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:06,905 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1586 transitions. [2021-11-22 16:23:06,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-22 16:23:06,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:06,917 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:06,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 16:23:06,919 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:23:06,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:06,923 INFO L85 PathProgramCache]: Analyzing trace with hash 875243964, now seen corresponding path program 1 times [2021-11-22 16:23:06,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:06,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963523090] [2021-11-22 16:23:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:06,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:23:07,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:07,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963523090] [2021-11-22 16:23:07,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963523090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:23:07,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:23:07,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 16:23:07,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786852280] [2021-11-22 16:23:07,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:23:07,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:23:07,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:07,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:23:07,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:23:07,110 INFO L87 Difference]: Start difference. First operand 948 states and 1586 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:07,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:07,377 INFO L93 Difference]: Finished difference Result 2785 states and 4666 transitions. [2021-11-22 16:23:07,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 16:23:07,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-11-22 16:23:07,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:07,395 INFO L225 Difference]: With dead ends: 2785 [2021-11-22 16:23:07,395 INFO L226 Difference]: Without dead ends: 1860 [2021-11-22 16:23:07,401 INFO L932 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 [2021-11-22 16:23:07,403 INFO L933 BasicCegarLoop]: 3080 mSDtfsCounter, 3126 mSDsluCounter, 4612 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3126 SdHoareTripleChecker+Valid, 7692 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:07,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3126 Valid, 7692 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:23:07,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-11-22 16:23:07,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 948. [2021-11-22 16:23:07,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 942 states have (on average 1.6825902335456475) internal successors, (1585), 947 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1585 transitions. [2021-11-22 16:23:07,470 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1585 transitions. Word has length 62 [2021-11-22 16:23:07,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:07,471 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1585 transitions. [2021-11-22 16:23:07,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:07,471 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1585 transitions. [2021-11-22 16:23:07,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-22 16:23:07,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:07,474 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:07,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 16:23:07,477 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:23:07,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:07,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1997097281, now seen corresponding path program 1 times [2021-11-22 16:23:07,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:07,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322661733] [2021-11-22 16:23:07,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:07,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:23:07,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:07,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322661733] [2021-11-22 16:23:07,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322661733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:23:07,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:23:07,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:23:07,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705986878] [2021-11-22 16:23:07,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:23:07,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:23:07,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:07,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:23:07,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:07,598 INFO L87 Difference]: Start difference. First operand 948 states and 1585 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:07,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:07,728 INFO L93 Difference]: Finished difference Result 1875 states and 3141 transitions. [2021-11-22 16:23:07,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:23:07,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-22 16:23:07,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:07,736 INFO L225 Difference]: With dead ends: 1875 [2021-11-22 16:23:07,736 INFO L226 Difference]: Without dead ends: 955 [2021-11-22 16:23:07,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:07,739 INFO L933 BasicCegarLoop]: 1589 mSDtfsCounter, 1558 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1558 SdHoareTripleChecker+Valid, 1611 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:07,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1558 Valid, 1611 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:23:07,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-11-22 16:23:07,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 948. [2021-11-22 16:23:07,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 942 states have (on average 1.6794055201698515) internal successors, (1582), 947 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:07,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1582 transitions. [2021-11-22 16:23:07,789 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1582 transitions. Word has length 63 [2021-11-22 16:23:07,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:07,790 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1582 transitions. [2021-11-22 16:23:07,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:07,790 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1582 transitions. [2021-11-22 16:23:07,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-22 16:23:07,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:07,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:07,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 16:23:07,793 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:23:07,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:07,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1237958950, now seen corresponding path program 1 times [2021-11-22 16:23:07,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:07,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704237645] [2021-11-22 16:23:07,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:07,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:23:07,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:07,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704237645] [2021-11-22 16:23:07,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704237645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:23:07,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:23:07,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 16:23:07,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240907793] [2021-11-22 16:23:07,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:23:07,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:23:07,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:07,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:23:07,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:23:07,909 INFO L87 Difference]: Start difference. First operand 948 states and 1582 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:08,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:08,129 INFO L93 Difference]: Finished difference Result 2772 states and 4643 transitions. [2021-11-22 16:23:08,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:23:08,129 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-22 16:23:08,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:08,143 INFO L225 Difference]: With dead ends: 2772 [2021-11-22 16:23:08,143 INFO L226 Difference]: Without dead ends: 1857 [2021-11-22 16:23:08,145 INFO L932 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 [2021-11-22 16:23:08,158 INFO L933 BasicCegarLoop]: 1566 mSDtfsCounter, 7661 mSDsluCounter, 1579 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7661 SdHoareTripleChecker+Valid, 3145 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:08,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7661 Valid, 3145 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:23:08,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2021-11-22 16:23:08,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 948. [2021-11-22 16:23:08,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 942 states have (on average 1.678343949044586) internal successors, (1581), 947 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:08,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1581 transitions. [2021-11-22 16:23:08,217 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1581 transitions. Word has length 65 [2021-11-22 16:23:08,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:08,217 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1581 transitions. [2021-11-22 16:23:08,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:08,218 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1581 transitions. [2021-11-22 16:23:08,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-22 16:23:08,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:08,220 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:08,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 16:23:08,221 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:23:08,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:08,221 INFO L85 PathProgramCache]: Analyzing trace with hash -682488105, now seen corresponding path program 1 times [2021-11-22 16:23:08,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:08,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975468988] [2021-11-22 16:23:08,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:08,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:08,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:23:08,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:08,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975468988] [2021-11-22 16:23:08,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975468988] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:23:08,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:23:08,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 16:23:08,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186697535] [2021-11-22 16:23:08,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:23:08,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:23:08,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:08,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:23:08,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:23:08,322 INFO L87 Difference]: Start difference. First operand 948 states and 1581 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:08,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:08,591 INFO L93 Difference]: Finished difference Result 2779 states and 4649 transitions. [2021-11-22 16:23:08,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:23:08,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-22 16:23:08,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:08,604 INFO L225 Difference]: With dead ends: 2779 [2021-11-22 16:23:08,604 INFO L226 Difference]: Without dead ends: 1864 [2021-11-22 16:23:08,607 INFO L932 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 [2021-11-22 16:23:08,607 INFO L933 BasicCegarLoop]: 1565 mSDtfsCounter, 7665 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7665 SdHoareTripleChecker+Valid, 3148 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:08,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7665 Valid, 3148 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:23:08,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-11-22 16:23:08,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 948. [2021-11-22 16:23:08,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 942 states have (on average 1.6772823779193207) internal successors, (1580), 947 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:08,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1580 transitions. [2021-11-22 16:23:08,677 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1580 transitions. Word has length 66 [2021-11-22 16:23:08,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:08,677 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1580 transitions. [2021-11-22 16:23:08,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:08,678 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1580 transitions. [2021-11-22 16:23:08,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-22 16:23:08,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:08,679 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:08,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 16:23:08,680 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:23:08,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:08,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1368839263, now seen corresponding path program 1 times [2021-11-22 16:23:08,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:08,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732663296] [2021-11-22 16:23:08,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:08,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:08,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:23:08,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:08,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732663296] [2021-11-22 16:23:08,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732663296] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:23:08,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:23:08,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:23:08,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091888802] [2021-11-22 16:23:08,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:23:08,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:23:08,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:08,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:23:08,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:08,751 INFO L87 Difference]: Start difference. First operand 948 states and 1580 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:08,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:08,830 INFO L93 Difference]: Finished difference Result 1597 states and 2636 transitions. [2021-11-22 16:23:08,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:23:08,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-22 16:23:08,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:08,837 INFO L225 Difference]: With dead ends: 1597 [2021-11-22 16:23:08,838 INFO L226 Difference]: Without dead ends: 951 [2021-11-22 16:23:08,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:08,841 INFO L933 BasicCegarLoop]: 1578 mSDtfsCounter, 1 mSDsluCounter, 1576 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 3154 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:08,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 3154 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:23:08,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-11-22 16:23:08,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 950. [2021-11-22 16:23:08,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 944 states have (on average 1.6758474576271187) internal successors, (1582), 949 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:08,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1582 transitions. [2021-11-22 16:23:08,939 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1582 transitions. Word has length 67 [2021-11-22 16:23:08,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:08,942 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 1582 transitions. [2021-11-22 16:23:08,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:08,943 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1582 transitions. [2021-11-22 16:23:08,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-22 16:23:08,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:08,945 INFO L514 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] [2021-11-22 16:23:08,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 16:23:08,945 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:23:08,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:08,947 INFO L85 PathProgramCache]: Analyzing trace with hash 109099459, now seen corresponding path program 1 times [2021-11-22 16:23:08,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:08,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524659346] [2021-11-22 16:23:08,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:08,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:09,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:23:09,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:09,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524659346] [2021-11-22 16:23:09,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524659346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:23:09,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:23:09,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:23:09,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510109882] [2021-11-22 16:23:09,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:23:09,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:23:09,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:09,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:23:09,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:09,008 INFO L87 Difference]: Start difference. First operand 950 states and 1582 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:09,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:09,140 INFO L93 Difference]: Finished difference Result 2722 states and 4556 transitions. [2021-11-22 16:23:09,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:23:09,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-22 16:23:09,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:09,153 INFO L225 Difference]: With dead ends: 2722 [2021-11-22 16:23:09,153 INFO L226 Difference]: Without dead ends: 1810 [2021-11-22 16:23:09,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:09,158 INFO L933 BasicCegarLoop]: 1579 mSDtfsCounter, 1530 mSDsluCounter, 1481 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1530 SdHoareTripleChecker+Valid, 3060 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:09,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1530 Valid, 3060 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:23:09,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-11-22 16:23:09,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1164. [2021-11-22 16:23:09,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1158 states have (on average 1.6994818652849741) internal successors, (1968), 1163 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:09,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 1968 transitions. [2021-11-22 16:23:09,255 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 1968 transitions. Word has length 73 [2021-11-22 16:23:09,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:09,255 INFO L470 AbstractCegarLoop]: Abstraction has 1164 states and 1968 transitions. [2021-11-22 16:23:09,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:09,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 1968 transitions. [2021-11-22 16:23:09,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-22 16:23:09,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:09,264 INFO L514 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] [2021-11-22 16:23:09,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 16:23:09,264 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:23:09,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:09,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1767155509, now seen corresponding path program 1 times [2021-11-22 16:23:09,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:09,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929452624] [2021-11-22 16:23:09,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:09,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:09,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:23:09,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:09,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929452624] [2021-11-22 16:23:09,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929452624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:23:09,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266214283] [2021-11-22 16:23:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:09,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:23:09,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_034eb70d-4036-4468-96de-de8665ca6124/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:23:09,331 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_034eb70d-4036-4468-96de-de8665ca6124/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:23:09,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_034eb70d-4036-4468-96de-de8665ca6124/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 16:23:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:09,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 16:23:09,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:23:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:23:09,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:23:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:23:09,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266214283] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:23:09,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:23:09,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 16:23:09,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142727392] [2021-11-22 16:23:09,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:23:09,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 16:23:09,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:09,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 16:23:09,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:23:09,984 INFO L87 Difference]: Start difference. First operand 1164 states and 1968 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:10,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:10,418 INFO L93 Difference]: Finished difference Result 4976 states and 8399 transitions. [2021-11-22 16:23:10,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:23:10,418 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 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 74 [2021-11-22 16:23:10,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:10,446 INFO L225 Difference]: With dead ends: 4976 [2021-11-22 16:23:10,447 INFO L226 Difference]: Without dead ends: 4330 [2021-11-22 16:23:10,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:23:10,451 INFO L933 BasicCegarLoop]: 1578 mSDtfsCounter, 6120 mSDsluCounter, 6216 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6120 SdHoareTripleChecker+Valid, 7794 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:10,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6120 Valid, 7794 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:23:10,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4330 states. [2021-11-22 16:23:10,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4330 to 2392. [2021-11-22 16:23:10,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2386 states have (on average 1.7539815590947192) internal successors, (4185), 2391 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:10,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 4185 transitions. [2021-11-22 16:23:10,675 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 4185 transitions. Word has length 74 [2021-11-22 16:23:10,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:10,675 INFO L470 AbstractCegarLoop]: Abstraction has 2392 states and 4185 transitions. [2021-11-22 16:23:10,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:10,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 4185 transitions. [2021-11-22 16:23:10,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-22 16:23:10,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:10,681 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:10,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_034eb70d-4036-4468-96de-de8665ca6124/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 16:23:10,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_034eb70d-4036-4468-96de-de8665ca6124/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:23:10,904 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:23:10,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:10,905 INFO L85 PathProgramCache]: Analyzing trace with hash -768058552, now seen corresponding path program 1 times [2021-11-22 16:23:10,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:10,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333760751] [2021-11-22 16:23:10,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:10,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:10,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:23:10,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:10,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333760751] [2021-11-22 16:23:10,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333760751] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:23:10,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:23:10,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:23:10,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661966139] [2021-11-22 16:23:10,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:23:10,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:23:10,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:10,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:23:10,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:10,956 INFO L87 Difference]: Start difference. First operand 2392 states and 4185 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:11,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:11,228 INFO L93 Difference]: Finished difference Result 6555 states and 11475 transitions. [2021-11-22 16:23:11,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:23:11,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-11-22 16:23:11,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:11,256 INFO L225 Difference]: With dead ends: 6555 [2021-11-22 16:23:11,256 INFO L226 Difference]: Without dead ends: 4263 [2021-11-22 16:23:11,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:11,261 INFO L933 BasicCegarLoop]: 1580 mSDtfsCounter, 1528 mSDsluCounter, 1575 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1528 SdHoareTripleChecker+Valid, 3155 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:11,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1528 Valid, 3155 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:23:11,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4263 states. [2021-11-22 16:23:11,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4263 to 3617. [2021-11-22 16:23:11,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3617 states, 3611 states have (on average 1.7693159789531985) internal successors, (6389), 3616 states have internal predecessors, (6389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:11,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3617 states to 3617 states and 6389 transitions. [2021-11-22 16:23:11,547 INFO L78 Accepts]: Start accepts. Automaton has 3617 states and 6389 transitions. Word has length 80 [2021-11-22 16:23:11,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:11,547 INFO L470 AbstractCegarLoop]: Abstraction has 3617 states and 6389 transitions. [2021-11-22 16:23:11,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:11,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3617 states and 6389 transitions. [2021-11-22 16:23:11,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-22 16:23:11,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:11,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:11,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 16:23:11,556 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:23:11,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:11,556 INFO L85 PathProgramCache]: Analyzing trace with hash -2109271800, now seen corresponding path program 1 times [2021-11-22 16:23:11,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:11,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101716504] [2021-11-22 16:23:11,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:11,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:23:11,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:11,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101716504] [2021-11-22 16:23:11,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101716504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:23:11,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:23:11,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:23:11,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066099048] [2021-11-22 16:23:11,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:23:11,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:23:11,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:11,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:23:11,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:11,613 INFO L87 Difference]: Start difference. First operand 3617 states and 6389 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:11,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:11,979 INFO L93 Difference]: Finished difference Result 9619 states and 17001 transitions. [2021-11-22 16:23:11,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:23:11,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-22 16:23:11,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:12,015 INFO L225 Difference]: With dead ends: 9619 [2021-11-22 16:23:12,015 INFO L226 Difference]: Without dead ends: 6192 [2021-11-22 16:23:12,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:12,023 INFO L933 BasicCegarLoop]: 1579 mSDtfsCounter, 1526 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1526 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:12,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1526 Valid, 3146 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:23:12,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6192 states. [2021-11-22 16:23:12,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6192 to 5546. [2021-11-22 16:23:12,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5546 states, 5540 states have (on average 1.7799638989169675) internal successors, (9861), 5545 states have internal predecessors, (9861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:12,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5546 states to 5546 states and 9861 transitions. [2021-11-22 16:23:12,434 INFO L78 Accepts]: Start accepts. Automaton has 5546 states and 9861 transitions. Word has length 81 [2021-11-22 16:23:12,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:12,434 INFO L470 AbstractCegarLoop]: Abstraction has 5546 states and 9861 transitions. [2021-11-22 16:23:12,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:12,435 INFO L276 IsEmpty]: Start isEmpty. Operand 5546 states and 9861 transitions. [2021-11-22 16:23:12,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-22 16:23:12,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:12,446 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:12,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-22 16:23:12,447 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:23:12,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:12,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1304935590, now seen corresponding path program 1 times [2021-11-22 16:23:12,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:12,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225726992] [2021-11-22 16:23:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:12,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:23:12,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:12,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225726992] [2021-11-22 16:23:12,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225726992] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:23:12,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:23:12,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:23:12,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131121804] [2021-11-22 16:23:12,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:23:12,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:23:12,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:12,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:23:12,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:12,496 INFO L87 Difference]: Start difference. First operand 5546 states and 9861 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:13,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:13,045 INFO L93 Difference]: Finished difference Result 13952 states and 24794 transitions. [2021-11-22 16:23:13,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:23:13,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-22 16:23:13,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:13,074 INFO L225 Difference]: With dead ends: 13952 [2021-11-22 16:23:13,074 INFO L226 Difference]: Without dead ends: 8953 [2021-11-22 16:23:13,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:13,084 INFO L933 BasicCegarLoop]: 1579 mSDtfsCounter, 1524 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 3098 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:13,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1524 Valid, 3098 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:23:13,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8953 states. [2021-11-22 16:23:13,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8953 to 8307. [2021-11-22 16:23:13,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8307 states, 8301 states have (on average 1.7842428623057462) internal successors, (14811), 8306 states have internal predecessors, (14811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:13,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8307 states to 8307 states and 14811 transitions. [2021-11-22 16:23:13,637 INFO L78 Accepts]: Start accepts. Automaton has 8307 states and 14811 transitions. Word has length 82 [2021-11-22 16:23:13,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:13,638 INFO L470 AbstractCegarLoop]: Abstraction has 8307 states and 14811 transitions. [2021-11-22 16:23:13,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:13,639 INFO L276 IsEmpty]: Start isEmpty. Operand 8307 states and 14811 transitions. [2021-11-22 16:23:13,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-22 16:23:13,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:13,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:13,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 16:23:13,653 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:23:13,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:13,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1926394646, now seen corresponding path program 1 times [2021-11-22 16:23:13,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:13,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121533920] [2021-11-22 16:23:13,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:13,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:23:13,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:13,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121533920] [2021-11-22 16:23:13,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121533920] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:23:13,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:23:13,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:23:13,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067551346] [2021-11-22 16:23:13,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:23:13,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:23:13,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:13,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:23:13,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:13,706 INFO L87 Difference]: Start difference. First operand 8307 states and 14811 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:14,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:14,375 INFO L93 Difference]: Finished difference Result 20490 states and 36526 transitions. [2021-11-22 16:23:14,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:23:14,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-22 16:23:14,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:14,417 INFO L225 Difference]: With dead ends: 20490 [2021-11-22 16:23:14,418 INFO L226 Difference]: Without dead ends: 13304 [2021-11-22 16:23:14,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:14,429 INFO L933 BasicCegarLoop]: 1579 mSDtfsCounter, 1522 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1522 SdHoareTripleChecker+Valid, 3098 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:14,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1522 Valid, 3098 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:23:14,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13304 states. [2021-11-22 16:23:15,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13304 to 12658. [2021-11-22 16:23:15,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12658 states, 12652 states have (on average 1.7861207714195384) internal successors, (22598), 12657 states have internal predecessors, (22598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:15,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12658 states to 12658 states and 22598 transitions. [2021-11-22 16:23:15,210 INFO L78 Accepts]: Start accepts. Automaton has 12658 states and 22598 transitions. Word has length 83 [2021-11-22 16:23:15,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:15,210 INFO L470 AbstractCegarLoop]: Abstraction has 12658 states and 22598 transitions. [2021-11-22 16:23:15,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:15,211 INFO L276 IsEmpty]: Start isEmpty. Operand 12658 states and 22598 transitions. [2021-11-22 16:23:15,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-22 16:23:15,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:15,229 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:15,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 16:23:15,229 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:23:15,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:15,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1717509526, now seen corresponding path program 1 times [2021-11-22 16:23:15,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:15,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824955138] [2021-11-22 16:23:15,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:15,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:23:15,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:15,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824955138] [2021-11-22 16:23:15,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824955138] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:23:15,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:23:15,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:23:15,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107386702] [2021-11-22 16:23:15,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:23:15,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:23:15,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:15,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:23:15,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:15,294 INFO L87 Difference]: Start difference. First operand 12658 states and 22598 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:16,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:16,296 INFO L93 Difference]: Finished difference Result 32394 states and 57928 transitions. [2021-11-22 16:23:16,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:23:16,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-22 16:23:16,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:16,366 INFO L225 Difference]: With dead ends: 32394 [2021-11-22 16:23:16,366 INFO L226 Difference]: Without dead ends: 21385 [2021-11-22 16:23:16,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:16,389 INFO L933 BasicCegarLoop]: 1579 mSDtfsCounter, 1520 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:16,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1520 Valid, 3146 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:23:16,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21385 states. [2021-11-22 16:23:17,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21385 to 20739. [2021-11-22 16:23:17,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20739 states, 20733 states have (on average 1.789273139439541) internal successors, (37097), 20738 states have internal predecessors, (37097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:17,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20739 states to 20739 states and 37097 transitions. [2021-11-22 16:23:17,860 INFO L78 Accepts]: Start accepts. Automaton has 20739 states and 37097 transitions. Word has length 84 [2021-11-22 16:23:17,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:17,860 INFO L470 AbstractCegarLoop]: Abstraction has 20739 states and 37097 transitions. [2021-11-22 16:23:17,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:17,861 INFO L276 IsEmpty]: Start isEmpty. Operand 20739 states and 37097 transitions. [2021-11-22 16:23:17,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-22 16:23:17,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:17,885 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:17,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 16:23:17,885 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:23:17,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:17,886 INFO L85 PathProgramCache]: Analyzing trace with hash 709956134, now seen corresponding path program 1 times [2021-11-22 16:23:17,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:17,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448676967] [2021-11-22 16:23:17,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:17,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:23:17,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:17,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448676967] [2021-11-22 16:23:17,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448676967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:23:17,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:23:17,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:23:17,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253525180] [2021-11-22 16:23:17,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:23:17,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:23:17,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:17,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:23:17,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:17,968 INFO L87 Difference]: Start difference. First operand 20739 states and 37097 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:19,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:19,360 INFO L93 Difference]: Finished difference Result 54045 states and 96961 transitions. [2021-11-22 16:23:19,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:23:19,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-22 16:23:19,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:19,599 INFO L225 Difference]: With dead ends: 54045 [2021-11-22 16:23:19,599 INFO L226 Difference]: Without dead ends: 35820 [2021-11-22 16:23:19,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:19,627 INFO L933 BasicCegarLoop]: 1579 mSDtfsCounter, 1518 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1518 SdHoareTripleChecker+Valid, 3145 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:19,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1518 Valid, 3145 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:23:19,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35820 states. [2021-11-22 16:23:21,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35820 to 35174. [2021-11-22 16:23:21,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35174 states, 35168 states have (on average 1.793306414922657) internal successors, (63067), 35173 states have internal predecessors, (63067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:21,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35174 states to 35174 states and 63067 transitions. [2021-11-22 16:23:21,481 INFO L78 Accepts]: Start accepts. Automaton has 35174 states and 63067 transitions. Word has length 85 [2021-11-22 16:23:21,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:21,481 INFO L470 AbstractCegarLoop]: Abstraction has 35174 states and 63067 transitions. [2021-11-22 16:23:21,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:21,482 INFO L276 IsEmpty]: Start isEmpty. Operand 35174 states and 63067 transitions. [2021-11-22 16:23:21,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-22 16:23:21,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:21,528 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:21,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 16:23:21,529 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:23:21,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:21,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1290867720, now seen corresponding path program 1 times [2021-11-22 16:23:21,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:21,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404688799] [2021-11-22 16:23:21,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:21,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:23:21,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:21,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404688799] [2021-11-22 16:23:21,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404688799] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:23:21,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:23:21,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:23:21,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178890797] [2021-11-22 16:23:21,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:23:21,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:23:21,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:21,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:23:21,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:21,596 INFO L87 Difference]: Start difference. First operand 35174 states and 63067 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:23,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:23,599 INFO L93 Difference]: Finished difference Result 87767 states and 156965 transitions. [2021-11-22 16:23:23,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:23:23,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-11-22 16:23:23,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:23,810 INFO L225 Difference]: With dead ends: 87767 [2021-11-22 16:23:23,811 INFO L226 Difference]: Without dead ends: 57315 [2021-11-22 16:23:23,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:23,859 INFO L933 BasicCegarLoop]: 1579 mSDtfsCounter, 1516 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 3071 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:23,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1516 Valid, 3071 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:23:23,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57315 states. [2021-11-22 16:23:26,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57315 to 56669. [2021-11-22 16:23:26,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56669 states, 56663 states have (on average 1.783297742795122) internal successors, (101047), 56668 states have internal predecessors, (101047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:26,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56669 states to 56669 states and 101047 transitions. [2021-11-22 16:23:26,373 INFO L78 Accepts]: Start accepts. Automaton has 56669 states and 101047 transitions. Word has length 86 [2021-11-22 16:23:26,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:26,374 INFO L470 AbstractCegarLoop]: Abstraction has 56669 states and 101047 transitions. [2021-11-22 16:23:26,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:26,374 INFO L276 IsEmpty]: Start isEmpty. Operand 56669 states and 101047 transitions. [2021-11-22 16:23:26,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-22 16:23:26,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:26,413 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:26,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 16:23:26,414 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:23:26,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:26,415 INFO L85 PathProgramCache]: Analyzing trace with hash 249722226, now seen corresponding path program 1 times [2021-11-22 16:23:26,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:26,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415876722] [2021-11-22 16:23:26,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:26,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:23:26,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:26,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415876722] [2021-11-22 16:23:26,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415876722] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:23:26,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:23:26,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:23:26,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98816223] [2021-11-22 16:23:26,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:23:26,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:23:26,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:26,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:23:26,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:26,672 INFO L87 Difference]: Start difference. First operand 56669 states and 101047 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:29,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:29,784 INFO L93 Difference]: Finished difference Result 145928 states and 260176 transitions. [2021-11-22 16:23:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:23:29,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2021-11-22 16:23:29,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:30,108 INFO L225 Difference]: With dead ends: 145928 [2021-11-22 16:23:30,109 INFO L226 Difference]: Without dead ends: 96284 [2021-11-22 16:23:30,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:30,194 INFO L933 BasicCegarLoop]: 1579 mSDtfsCounter, 1514 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1514 SdHoareTripleChecker+Valid, 3098 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:30,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1514 Valid, 3098 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:23:30,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96284 states. [2021-11-22 16:23:33,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96284 to 95638. [2021-11-22 16:23:33,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95638 states, 95632 states have (on average 1.779655345491049) internal successors, (170192), 95637 states have internal predecessors, (170192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:34,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95638 states to 95638 states and 170192 transitions. [2021-11-22 16:23:34,100 INFO L78 Accepts]: Start accepts. Automaton has 95638 states and 170192 transitions. Word has length 87 [2021-11-22 16:23:34,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:34,101 INFO L470 AbstractCegarLoop]: Abstraction has 95638 states and 170192 transitions. [2021-11-22 16:23:34,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:34,101 INFO L276 IsEmpty]: Start isEmpty. Operand 95638 states and 170192 transitions. [2021-11-22 16:23:34,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-22 16:23:34,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:34,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:34,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-22 16:23:34,131 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:23:34,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:34,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1816286848, now seen corresponding path program 1 times [2021-11-22 16:23:34,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:34,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128575481] [2021-11-22 16:23:34,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:34,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:34,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:23:34,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:34,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128575481] [2021-11-22 16:23:34,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128575481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:23:34,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:23:34,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:23:34,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760904270] [2021-11-22 16:23:34,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:23:34,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:23:34,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:34,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:23:34,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:34,185 INFO L87 Difference]: Start difference. First operand 95638 states and 170192 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:39,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:39,641 INFO L93 Difference]: Finished difference Result 263725 states and 470463 transitions. [2021-11-22 16:23:39,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:23:39,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 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 88 [2021-11-22 16:23:39,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:40,098 INFO L225 Difference]: With dead ends: 263725 [2021-11-22 16:23:40,098 INFO L226 Difference]: Without dead ends: 177092 [2021-11-22 16:23:40,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:40,187 INFO L933 BasicCegarLoop]: 1579 mSDtfsCounter, 1512 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1512 SdHoareTripleChecker+Valid, 3145 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:40,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1512 Valid, 3145 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:23:40,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177092 states. [2021-11-22 16:23:47,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177092 to 176446. [2021-11-22 16:23:47,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176446 states, 176440 states have (on average 1.782192246656087) internal successors, (314450), 176445 states have internal predecessors, (314450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:47,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176446 states to 176446 states and 314450 transitions. [2021-11-22 16:23:47,808 INFO L78 Accepts]: Start accepts. Automaton has 176446 states and 314450 transitions. Word has length 88 [2021-11-22 16:23:47,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:47,809 INFO L470 AbstractCegarLoop]: Abstraction has 176446 states and 314450 transitions. [2021-11-22 16:23:47,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:47,809 INFO L276 IsEmpty]: Start isEmpty. Operand 176446 states and 314450 transitions. [2021-11-22 16:23:47,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-22 16:23:47,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:47,830 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:47,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-22 16:23:47,830 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:23:47,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:47,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1936322114, now seen corresponding path program 1 times [2021-11-22 16:23:47,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:47,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994142399] [2021-11-22 16:23:47,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:47,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:23:47,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:47,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994142399] [2021-11-22 16:23:47,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994142399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:23:47,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:23:47,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:23:47,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556003539] [2021-11-22 16:23:47,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:23:47,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:23:47,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:47,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:23:47,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:47,882 INFO L87 Difference]: Start difference. First operand 176446 states and 314450 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)