./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb2a944-7523-43b3-b7b5-4d31c23613c1/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb2a944-7523-43b3-b7b5-4d31c23613c1/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb2a944-7523-43b3-b7b5-4d31c23613c1/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb2a944-7523-43b3-b7b5-4d31c23613c1/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb2a944-7523-43b3-b7b5-4d31c23613c1/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb2a944-7523-43b3-b7b5-4d31c23613c1/bin/uautomizer-DQz5hQGWxF --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 9475964eaf3c99c585f18d5c2e0c0a26c1a8a589a644152df77fbb74995f4153 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:38:38,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:38:38,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:38:38,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:38:38,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:38:38,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:38:38,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:38:38,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:38:38,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:38:38,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:38:38,379 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:38:38,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:38:38,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:38:38,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:38:38,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:38:38,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:38:38,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:38:38,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:38:38,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:38:38,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:38:38,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:38:38,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:38:38,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:38:38,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:38:38,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:38:38,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:38:38,401 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:38:38,402 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:38:38,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:38:38,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:38:38,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:38:38,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:38:38,405 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:38:38,406 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:38:38,407 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:38:38,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:38:38,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:38:38,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:38:38,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:38:38,411 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:38:38,411 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:38:38,412 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb2a944-7523-43b3-b7b5-4d31c23613c1/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:38:38,435 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:38:38,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:38:38,439 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:38:38,440 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:38:38,440 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:38:38,440 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:38:38,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:38:38,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:38:38,441 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:38:38,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:38:38,442 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:38:38,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:38:38,442 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:38:38,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:38:38,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:38:38,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:38:38,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:38:38,444 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:38:38,444 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:38:38,444 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:38:38,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:38:38,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:38:38,445 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:38:38,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:38:38,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:38:38,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:38:38,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:38:38,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:38:38,446 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:38:38,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:38:38,447 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:38:38,447 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:38:38,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:38:38,448 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:38:38,448 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_beb2a944-7523-43b3-b7b5-4d31c23613c1/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb2a944-7523-43b3-b7b5-4d31c23613c1/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9475964eaf3c99c585f18d5c2e0c0a26c1a8a589a644152df77fbb74995f4153 [2021-11-20 05:38:38,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:38:38,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:38:38,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:38:38,741 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:38:38,743 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:38:38,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb2a944-7523-43b3-b7b5-4d31c23613c1/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-20 05:38:38,844 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb2a944-7523-43b3-b7b5-4d31c23613c1/bin/uautomizer-DQz5hQGWxF/data/124017f07/a67bcdb16718460d9b588a5bdf7222eb/FLAG60ed9e20e [2021-11-20 05:38:39,297 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:38:39,298 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb2a944-7523-43b3-b7b5-4d31c23613c1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-20 05:38:39,308 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb2a944-7523-43b3-b7b5-4d31c23613c1/bin/uautomizer-DQz5hQGWxF/data/124017f07/a67bcdb16718460d9b588a5bdf7222eb/FLAG60ed9e20e [2021-11-20 05:38:39,664 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb2a944-7523-43b3-b7b5-4d31c23613c1/bin/uautomizer-DQz5hQGWxF/data/124017f07/a67bcdb16718460d9b588a5bdf7222eb [2021-11-20 05:38:39,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:38:39,668 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:38:39,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:38:39,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:38:39,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:38:39,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:38:39" (1/1) ... [2021-11-20 05:38:39,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52bb47a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:39, skipping insertion in model container [2021-11-20 05:38:39,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:38:39" (1/1) ... [2021-11-20 05:38:39,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:38:39,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:38:39,957 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_beb2a944-7523-43b3-b7b5-4d31c23613c1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6732,6745] [2021-11-20 05:38:39,986 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:38:40,000 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:38:40,046 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_beb2a944-7523-43b3-b7b5-4d31c23613c1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6732,6745] [2021-11-20 05:38:40,068 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:38:40,096 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:38:40,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:40 WrapperNode [2021-11-20 05:38:40,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:38:40,098 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:38:40,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:38:40,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:38:40,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:40" (1/1) ... [2021-11-20 05:38:40,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:40" (1/1) ... [2021-11-20 05:38:40,184 INFO L137 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 492 [2021-11-20 05:38:40,185 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:38:40,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:38:40,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:38:40,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:38:40,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:40" (1/1) ... [2021-11-20 05:38:40,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:40" (1/1) ... [2021-11-20 05:38:40,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:40" (1/1) ... [2021-11-20 05:38:40,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:40" (1/1) ... [2021-11-20 05:38:40,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:40" (1/1) ... [2021-11-20 05:38:40,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:40" (1/1) ... [2021-11-20 05:38:40,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:40" (1/1) ... [2021-11-20 05:38:40,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:38:40,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:38:40,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:38:40,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:38:40,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:40" (1/1) ... [2021-11-20 05:38:40,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:38:40,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb2a944-7523-43b3-b7b5-4d31c23613c1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:38:40,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb2a944-7523-43b3-b7b5-4d31c23613c1/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:38:40,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb2a944-7523-43b3-b7b5-4d31c23613c1/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:38:40,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:38:40,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:38:40,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:38:40,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:38:40,414 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:38:40,416 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:38:40,975 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:38:40,983 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:38:40,983 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 05:38:40,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:38:40 BoogieIcfgContainer [2021-11-20 05:38:40,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:38:40,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:38:40,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:38:40,991 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:38:40,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:38:39" (1/3) ... [2021-11-20 05:38:40,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d1b19c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:38:40, skipping insertion in model container [2021-11-20 05:38:40,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:40" (2/3) ... [2021-11-20 05:38:40,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d1b19c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:38:40, skipping insertion in model container [2021-11-20 05:38:40,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:38:40" (3/3) ... [2021-11-20 05:38:40,994 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-20 05:38:40,999 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:38:41,000 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:38:41,048 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:38:41,055 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 [2021-11-20 05:38:41,055 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:38:41,073 INFO L276 IsEmpty]: Start isEmpty. Operand has 118 states, 116 states have (on average 1.7327586206896552) internal successors, (201), 117 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:41,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-20 05:38:41,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:41,083 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] [2021-11-20 05:38:41,084 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:41,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:41,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1122612567, now seen corresponding path program 1 times [2021-11-20 05:38:41,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:41,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968795145] [2021-11-20 05:38:41,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:41,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:41,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:41,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968795145] [2021-11-20 05:38:41,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968795145] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:41,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:41,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:38:41,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033232177] [2021-11-20 05:38:41,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:41,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:38:41,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:41,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:38:41,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:38:41,595 INFO L87 Difference]: Start difference. First operand has 118 states, 116 states have (on average 1.7327586206896552) internal successors, (201), 117 states have internal predecessors, (201), 0 states have call successors, (0), 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 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) [2021-11-20 05:38:41,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:41,697 INFO L93 Difference]: Finished difference Result 260 states and 422 transitions. [2021-11-20 05:38:41,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:38:41,702 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 [2021-11-20 05:38:41,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:41,720 INFO L225 Difference]: With dead ends: 260 [2021-11-20 05:38:41,720 INFO L226 Difference]: Without dead ends: 179 [2021-11-20 05:38:41,724 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 [2021-11-20 05:38:41,728 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 133 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:41,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 403 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:38:41,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-20 05:38:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2021-11-20 05:38:41,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.4545454545454546) internal successors, (256), 176 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:41,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 256 transitions. [2021-11-20 05:38:41,811 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 256 transitions. Word has length 73 [2021-11-20 05:38:41,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:41,812 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 256 transitions. [2021-11-20 05:38:41,812 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) [2021-11-20 05:38:41,813 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 256 transitions. [2021-11-20 05:38:41,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-20 05:38:41,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:41,822 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] [2021-11-20 05:38:41,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:38:41,823 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:41,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:41,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1622464055, now seen corresponding path program 1 times [2021-11-20 05:38:41,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:41,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238300099] [2021-11-20 05:38:41,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:41,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:41,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:41,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238300099] [2021-11-20 05:38:41,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238300099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:41,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:41,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:38:41,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751713538] [2021-11-20 05:38:41,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:41,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:38:41,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:41,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:38:41,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:38:41,965 INFO L87 Difference]: Start difference. First operand 177 states and 256 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:42,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:42,006 INFO L93 Difference]: Finished difference Result 429 states and 656 transitions. [2021-11-20 05:38:42,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:38:42,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 [2021-11-20 05:38:42,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:42,010 INFO L225 Difference]: With dead ends: 429 [2021-11-20 05:38:42,010 INFO L226 Difference]: Without dead ends: 295 [2021-11-20 05:38:42,011 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 [2021-11-20 05:38:42,013 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 94 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:42,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 344 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:38:42,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-20 05:38:42,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 293. [2021-11-20 05:38:42,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.5068493150684932) internal successors, (440), 292 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:42,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 440 transitions. [2021-11-20 05:38:42,044 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 440 transitions. Word has length 74 [2021-11-20 05:38:42,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:42,045 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 440 transitions. [2021-11-20 05:38:42,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:42,046 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 440 transitions. [2021-11-20 05:38:42,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-20 05:38:42,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:42,047 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] [2021-11-20 05:38:42,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:38:42,048 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:42,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:42,049 INFO L85 PathProgramCache]: Analyzing trace with hash 549627260, now seen corresponding path program 1 times [2021-11-20 05:38:42,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:42,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79553608] [2021-11-20 05:38:42,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:42,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:42,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:42,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79553608] [2021-11-20 05:38:42,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79553608] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:42,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:42,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:38:42,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665592210] [2021-11-20 05:38:42,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:42,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:38:42,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:42,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:38:42,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:38:42,180 INFO L87 Difference]: Start difference. First operand 293 states and 440 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:42,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:42,266 INFO L93 Difference]: Finished difference Result 761 states and 1182 transitions. [2021-11-20 05:38:42,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:38:42,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-20 05:38:42,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:42,271 INFO L225 Difference]: With dead ends: 761 [2021-11-20 05:38:42,271 INFO L226 Difference]: Without dead ends: 511 [2021-11-20 05:38:42,273 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 [2021-11-20 05:38:42,275 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 89 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:42,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 340 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:38:42,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-11-20 05:38:42,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 509. [2021-11-20 05:38:42,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 1.5354330708661417) internal successors, (780), 508 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:42,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 780 transitions. [2021-11-20 05:38:42,357 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 780 transitions. Word has length 75 [2021-11-20 05:38:42,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:42,357 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 780 transitions. [2021-11-20 05:38:42,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:42,358 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 780 transitions. [2021-11-20 05:38:42,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 05:38:42,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:42,360 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] [2021-11-20 05:38:42,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 05:38:42,361 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:42,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:42,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1347673334, now seen corresponding path program 1 times [2021-11-20 05:38:42,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:42,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646138263] [2021-11-20 05:38:42,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:42,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:42,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:42,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:42,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646138263] [2021-11-20 05:38:42,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646138263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:42,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:42,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:38:42,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500059359] [2021-11-20 05:38:42,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:42,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:38:42,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:42,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:38:42,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:38:42,441 INFO L87 Difference]: Start difference. First operand 509 states and 780 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:42,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:42,503 INFO L93 Difference]: Finished difference Result 1377 states and 2150 transitions. [2021-11-20 05:38:42,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:38:42,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-11-20 05:38:42,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:42,514 INFO L225 Difference]: With dead ends: 1377 [2021-11-20 05:38:42,514 INFO L226 Difference]: Without dead ends: 911 [2021-11-20 05:38:42,518 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 [2021-11-20 05:38:42,529 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 84 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:42,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 336 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:38:42,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2021-11-20 05:38:42,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 909. [2021-11-20 05:38:42,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 1.5462555066079295) internal successors, (1404), 908 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1404 transitions. [2021-11-20 05:38:42,598 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1404 transitions. Word has length 76 [2021-11-20 05:38:42,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:42,600 INFO L470 AbstractCegarLoop]: Abstraction has 909 states and 1404 transitions. [2021-11-20 05:38:42,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:42,600 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1404 transitions. [2021-11-20 05:38:42,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 05:38:42,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:42,606 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] [2021-11-20 05:38:42,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 05:38:42,606 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:42,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:42,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1762980839, now seen corresponding path program 1 times [2021-11-20 05:38:42,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:42,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649549091] [2021-11-20 05:38:42,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:42,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:42,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:42,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:42,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649549091] [2021-11-20 05:38:42,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649549091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:42,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:42,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:38:42,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778592465] [2021-11-20 05:38:42,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:42,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:38:42,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:42,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:38:42,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:38:42,692 INFO L87 Difference]: Start difference. First operand 909 states and 1404 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:42,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:42,778 INFO L93 Difference]: Finished difference Result 2513 states and 3918 transitions. [2021-11-20 05:38:42,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:38:42,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-20 05:38:42,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:42,806 INFO L225 Difference]: With dead ends: 2513 [2021-11-20 05:38:42,806 INFO L226 Difference]: Without dead ends: 1647 [2021-11-20 05:38:42,807 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 [2021-11-20 05:38:42,812 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 79 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:42,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 332 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:38:42,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-11-20 05:38:42,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1645. [2021-11-20 05:38:42,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 1.5450121654501217) internal successors, (2540), 1644 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:42,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2540 transitions. [2021-11-20 05:38:42,915 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2540 transitions. Word has length 77 [2021-11-20 05:38:42,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:42,915 INFO L470 AbstractCegarLoop]: Abstraction has 1645 states and 2540 transitions. [2021-11-20 05:38:42,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:42,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2540 transitions. [2021-11-20 05:38:42,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-20 05:38:42,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:42,917 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:42,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 05:38:42,918 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:42,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:42,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1296361934, now seen corresponding path program 1 times [2021-11-20 05:38:42,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:42,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868959259] [2021-11-20 05:38:42,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:42,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:42,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:43,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:43,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868959259] [2021-11-20 05:38:43,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868959259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:43,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:43,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 05:38:43,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389923991] [2021-11-20 05:38:43,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:43,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:38:43,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:43,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:38:43,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:38:43,029 INFO L87 Difference]: Start difference. First operand 1645 states and 2540 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:44,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:44,406 INFO L93 Difference]: Finished difference Result 20869 states and 32504 transitions. [2021-11-20 05:38:44,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:38:44,406 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-11-20 05:38:44,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:44,520 INFO L225 Difference]: With dead ends: 20869 [2021-11-20 05:38:44,520 INFO L226 Difference]: Without dead ends: 19267 [2021-11-20 05:38:44,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:38:44,528 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 1770 mSDsluCounter, 2750 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1770 SdHoareTripleChecker+Valid, 2903 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:44,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1770 Valid, 2903 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:38:44,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19267 states. [2021-11-20 05:38:44,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19267 to 3245. [2021-11-20 05:38:45,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3245 states, 3244 states have (on average 1.532675709001233) internal successors, (4972), 3244 states have internal predecessors, (4972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:45,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3245 states to 3245 states and 4972 transitions. [2021-11-20 05:38:45,029 INFO L78 Accepts]: Start accepts. Automaton has 3245 states and 4972 transitions. Word has length 78 [2021-11-20 05:38:45,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:45,030 INFO L470 AbstractCegarLoop]: Abstraction has 3245 states and 4972 transitions. [2021-11-20 05:38:45,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:45,030 INFO L276 IsEmpty]: Start isEmpty. Operand 3245 states and 4972 transitions. [2021-11-20 05:38:45,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-20 05:38:45,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:45,034 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] [2021-11-20 05:38:45,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 05:38:45,034 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:45,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:45,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1185122290, now seen corresponding path program 1 times [2021-11-20 05:38:45,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:45,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105042768] [2021-11-20 05:38:45,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:45,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:45,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:45,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105042768] [2021-11-20 05:38:45,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105042768] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:45,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:45,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:38:45,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688182996] [2021-11-20 05:38:45,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:45,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:38:45,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:45,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:38:45,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:38:45,189 INFO L87 Difference]: Start difference. First operand 3245 states and 4972 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) [2021-11-20 05:38:45,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:45,716 INFO L93 Difference]: Finished difference Result 9297 states and 14222 transitions. [2021-11-20 05:38:45,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:38:45,717 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 [2021-11-20 05:38:45,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:45,743 INFO L225 Difference]: With dead ends: 9297 [2021-11-20 05:38:45,743 INFO L226 Difference]: Without dead ends: 6095 [2021-11-20 05:38:45,749 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 [2021-11-20 05:38:45,750 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 69 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:45,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 262 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:38:45,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6095 states. [2021-11-20 05:38:46,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6095 to 6029. [2021-11-20 05:38:46,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6029 states, 6028 states have (on average 1.504313205043132) internal successors, (9068), 6028 states have internal predecessors, (9068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:46,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6029 states to 6029 states and 9068 transitions. [2021-11-20 05:38:46,275 INFO L78 Accepts]: Start accepts. Automaton has 6029 states and 9068 transitions. Word has length 80 [2021-11-20 05:38:46,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:46,276 INFO L470 AbstractCegarLoop]: Abstraction has 6029 states and 9068 transitions. [2021-11-20 05:38:46,276 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) [2021-11-20 05:38:46,276 INFO L276 IsEmpty]: Start isEmpty. Operand 6029 states and 9068 transitions. [2021-11-20 05:38:46,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-20 05:38:46,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:46,277 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] [2021-11-20 05:38:46,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 05:38:46,278 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:46,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:46,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1164119635, now seen corresponding path program 1 times [2021-11-20 05:38:46,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:46,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699777588] [2021-11-20 05:38:46,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:46,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:46,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:46,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699777588] [2021-11-20 05:38:46,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699777588] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:46,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:46,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 05:38:46,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007297513] [2021-11-20 05:38:46,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:46,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:38:46,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:46,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:38:46,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:38:46,565 INFO L87 Difference]: Start difference. First operand 6029 states and 9068 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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) [2021-11-20 05:38:47,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:47,378 INFO L93 Difference]: Finished difference Result 12017 states and 18094 transitions. [2021-11-20 05:38:47,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:38:47,379 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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 [2021-11-20 05:38:47,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:47,398 INFO L225 Difference]: With dead ends: 12017 [2021-11-20 05:38:47,399 INFO L226 Difference]: Without dead ends: 6031 [2021-11-20 05:38:47,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:38:47,409 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 660 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:47,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 747 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:38:47,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6031 states. [2021-11-20 05:38:47,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6031 to 6029. [2021-11-20 05:38:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6029 states, 6028 states have (on average 1.493696084936961) internal successors, (9004), 6028 states have internal predecessors, (9004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:47,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6029 states to 6029 states and 9004 transitions. [2021-11-20 05:38:48,000 INFO L78 Accepts]: Start accepts. Automaton has 6029 states and 9004 transitions. Word has length 80 [2021-11-20 05:38:48,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:48,001 INFO L470 AbstractCegarLoop]: Abstraction has 6029 states and 9004 transitions. [2021-11-20 05:38:48,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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) [2021-11-20 05:38:48,002 INFO L276 IsEmpty]: Start isEmpty. Operand 6029 states and 9004 transitions. [2021-11-20 05:38:48,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-20 05:38:48,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:48,003 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] [2021-11-20 05:38:48,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 05:38:48,009 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:48,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:48,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1866969369, now seen corresponding path program 1 times [2021-11-20 05:38:48,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:48,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690640743] [2021-11-20 05:38:48,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:48,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:48,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:48,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690640743] [2021-11-20 05:38:48,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690640743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:48,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:48,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:38:48,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096434679] [2021-11-20 05:38:48,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:48,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:38:48,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:48,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:38:48,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:38:48,080 INFO L87 Difference]: Start difference. First operand 6029 states and 9004 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) [2021-11-20 05:38:48,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:48,686 INFO L93 Difference]: Finished difference Result 11796 states and 17778 transitions. [2021-11-20 05:38:48,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:38:48,686 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 [2021-11-20 05:38:48,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:48,706 INFO L225 Difference]: With dead ends: 11796 [2021-11-20 05:38:48,707 INFO L226 Difference]: Without dead ends: 8593 [2021-11-20 05:38:48,714 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 [2021-11-20 05:38:48,714 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 101 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:48,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 356 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:38:48,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8593 states. [2021-11-20 05:38:49,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8593 to 8591. [2021-11-20 05:38:49,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8591 states, 8590 states have (on average 1.4917345750873108) internal successors, (12814), 8590 states have internal predecessors, (12814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:49,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8591 states to 8591 states and 12814 transitions. [2021-11-20 05:38:49,364 INFO L78 Accepts]: Start accepts. Automaton has 8591 states and 12814 transitions. Word has length 81 [2021-11-20 05:38:49,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:49,365 INFO L470 AbstractCegarLoop]: Abstraction has 8591 states and 12814 transitions. [2021-11-20 05:38:49,365 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) [2021-11-20 05:38:49,365 INFO L276 IsEmpty]: Start isEmpty. Operand 8591 states and 12814 transitions. [2021-11-20 05:38:49,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-20 05:38:49,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:49,366 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] [2021-11-20 05:38:49,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 05:38:49,367 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:49,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:49,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1729879629, now seen corresponding path program 1 times [2021-11-20 05:38:49,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:49,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358293108] [2021-11-20 05:38:49,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:49,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:49,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:49,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358293108] [2021-11-20 05:38:49,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358293108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:49,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:49,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:38:49,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611037395] [2021-11-20 05:38:49,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:49,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:38:49,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:49,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:38:49,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:38:49,435 INFO L87 Difference]: Start difference. First operand 8591 states and 12814 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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) [2021-11-20 05:38:50,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:50,127 INFO L93 Difference]: Finished difference Result 17137 states and 25583 transitions. [2021-11-20 05:38:50,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:38:50,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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 [2021-11-20 05:38:50,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:50,188 INFO L225 Difference]: With dead ends: 17137 [2021-11-20 05:38:50,189 INFO L226 Difference]: Without dead ends: 8591 [2021-11-20 05:38:50,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:38:50,198 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 360 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:50,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 133 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:38:50,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8591 states. [2021-11-20 05:38:50,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8591 to 8591. [2021-11-20 05:38:50,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8591 states, 8590 states have (on average 1.480558789289872) internal successors, (12718), 8590 states have internal predecessors, (12718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:50,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8591 states to 8591 states and 12718 transitions. [2021-11-20 05:38:50,828 INFO L78 Accepts]: Start accepts. Automaton has 8591 states and 12718 transitions. Word has length 81 [2021-11-20 05:38:50,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:50,828 INFO L470 AbstractCegarLoop]: Abstraction has 8591 states and 12718 transitions. [2021-11-20 05:38:50,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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) [2021-11-20 05:38:50,829 INFO L276 IsEmpty]: Start isEmpty. Operand 8591 states and 12718 transitions. [2021-11-20 05:38:50,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-20 05:38:50,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:50,830 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] [2021-11-20 05:38:50,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 05:38:50,830 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:50,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:50,831 INFO L85 PathProgramCache]: Analyzing trace with hash -864347240, now seen corresponding path program 1 times [2021-11-20 05:38:50,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:50,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941677107] [2021-11-20 05:38:50,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:50,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:50,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:50,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941677107] [2021-11-20 05:38:50,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941677107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:50,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:50,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:38:50,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434160918] [2021-11-20 05:38:50,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:50,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:38:50,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:50,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:38:50,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:38:50,904 INFO L87 Difference]: Start difference. First operand 8591 states and 12718 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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) [2021-11-20 05:38:51,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:51,630 INFO L93 Difference]: Finished difference Result 17137 states and 25391 transitions. [2021-11-20 05:38:51,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:38:51,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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 [2021-11-20 05:38:51,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:51,651 INFO L225 Difference]: With dead ends: 17137 [2021-11-20 05:38:51,651 INFO L226 Difference]: Without dead ends: 8591 [2021-11-20 05:38:51,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:38:51,664 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 370 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:51,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 125 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:38:51,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8591 states. [2021-11-20 05:38:52,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8591 to 8591. [2021-11-20 05:38:52,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8591 states, 8590 states have (on average 1.4693830034924331) internal successors, (12622), 8590 states have internal predecessors, (12622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:52,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8591 states to 8591 states and 12622 transitions. [2021-11-20 05:38:52,400 INFO L78 Accepts]: Start accepts. Automaton has 8591 states and 12622 transitions. Word has length 81 [2021-11-20 05:38:52,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:52,400 INFO L470 AbstractCegarLoop]: Abstraction has 8591 states and 12622 transitions. [2021-11-20 05:38:52,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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) [2021-11-20 05:38:52,401 INFO L276 IsEmpty]: Start isEmpty. Operand 8591 states and 12622 transitions. [2021-11-20 05:38:52,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-20 05:38:52,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:52,402 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] [2021-11-20 05:38:52,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 05:38:52,403 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:52,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:52,403 INFO L85 PathProgramCache]: Analyzing trace with hash -736261933, now seen corresponding path program 1 times [2021-11-20 05:38:52,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:52,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339063116] [2021-11-20 05:38:52,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:52,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:52,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:52,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339063116] [2021-11-20 05:38:52,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339063116] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:52,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:52,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:38:52,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575275239] [2021-11-20 05:38:52,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:52,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:38:52,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:52,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:38:52,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:38:52,469 INFO L87 Difference]: Start difference. First operand 8591 states and 12622 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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) [2021-11-20 05:38:53,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:53,308 INFO L93 Difference]: Finished difference Result 17137 states and 25199 transitions. [2021-11-20 05:38:53,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:38:53,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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 [2021-11-20 05:38:53,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:53,323 INFO L225 Difference]: With dead ends: 17137 [2021-11-20 05:38:53,323 INFO L226 Difference]: Without dead ends: 8591 [2021-11-20 05:38:53,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:38:53,334 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 393 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:53,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 109 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:38:53,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8591 states. [2021-11-20 05:38:53,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8591 to 8591. [2021-11-20 05:38:53,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8591 states, 8590 states have (on average 1.4582072176949943) internal successors, (12526), 8590 states have internal predecessors, (12526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:53,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8591 states to 8591 states and 12526 transitions. [2021-11-20 05:38:53,948 INFO L78 Accepts]: Start accepts. Automaton has 8591 states and 12526 transitions. Word has length 81 [2021-11-20 05:38:53,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:53,949 INFO L470 AbstractCegarLoop]: Abstraction has 8591 states and 12526 transitions. [2021-11-20 05:38:53,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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) [2021-11-20 05:38:53,949 INFO L276 IsEmpty]: Start isEmpty. Operand 8591 states and 12526 transitions. [2021-11-20 05:38:53,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-20 05:38:53,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:53,950 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] [2021-11-20 05:38:53,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 05:38:53,950 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:53,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:53,951 INFO L85 PathProgramCache]: Analyzing trace with hash -367990706, now seen corresponding path program 1 times [2021-11-20 05:38:53,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:53,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43958938] [2021-11-20 05:38:53,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:53,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:54,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:54,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43958938] [2021-11-20 05:38:54,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43958938] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:54,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:54,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:38:54,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548859238] [2021-11-20 05:38:54,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:54,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:38:54,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:54,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:38:54,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:38:54,019 INFO L87 Difference]: Start difference. First operand 8591 states and 12526 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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) [2021-11-20 05:38:54,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:54,668 INFO L93 Difference]: Finished difference Result 17137 states and 25007 transitions. [2021-11-20 05:38:54,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:38:54,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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 [2021-11-20 05:38:54,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:54,684 INFO L225 Difference]: With dead ends: 17137 [2021-11-20 05:38:54,684 INFO L226 Difference]: Without dead ends: 8591 [2021-11-20 05:38:54,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:38:54,696 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 377 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:54,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 117 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:38:54,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8591 states. [2021-11-20 05:38:55,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8591 to 8591. [2021-11-20 05:38:55,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8591 states, 8590 states have (on average 1.4470314318975552) internal successors, (12430), 8590 states have internal predecessors, (12430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:55,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8591 states to 8591 states and 12430 transitions. [2021-11-20 05:38:55,648 INFO L78 Accepts]: Start accepts. Automaton has 8591 states and 12430 transitions. Word has length 81 [2021-11-20 05:38:55,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:55,649 INFO L470 AbstractCegarLoop]: Abstraction has 8591 states and 12430 transitions. [2021-11-20 05:38:55,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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) [2021-11-20 05:38:55,649 INFO L276 IsEmpty]: Start isEmpty. Operand 8591 states and 12430 transitions. [2021-11-20 05:38:55,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-20 05:38:55,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:55,650 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] [2021-11-20 05:38:55,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 05:38:55,651 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:55,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:55,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1130854413, now seen corresponding path program 1 times [2021-11-20 05:38:55,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:55,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139472303] [2021-11-20 05:38:55,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:55,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:55,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:55,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139472303] [2021-11-20 05:38:55,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139472303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:55,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:55,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:38:55,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924176038] [2021-11-20 05:38:55,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:55,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:38:55,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:55,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:38:55,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:38:55,733 INFO L87 Difference]: Start difference. First operand 8591 states and 12430 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 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) [2021-11-20 05:38:57,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:57,122 INFO L93 Difference]: Finished difference Result 15485 states and 22341 transitions. [2021-11-20 05:38:57,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:38:57,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 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 [2021-11-20 05:38:57,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:57,138 INFO L225 Difference]: With dead ends: 15485 [2021-11-20 05:38:57,138 INFO L226 Difference]: Without dead ends: 15483 [2021-11-20 05:38:57,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:38:57,141 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 204 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:57,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 695 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:38:57,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15483 states. [2021-11-20 05:38:57,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15483 to 8847. [2021-11-20 05:38:57,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8847 states, 8846 states have (on average 1.4304770517748135) internal successors, (12654), 8846 states have internal predecessors, (12654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:57,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8847 states to 8847 states and 12654 transitions. [2021-11-20 05:38:57,937 INFO L78 Accepts]: Start accepts. Automaton has 8847 states and 12654 transitions. Word has length 81 [2021-11-20 05:38:57,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:57,937 INFO L470 AbstractCegarLoop]: Abstraction has 8847 states and 12654 transitions. [2021-11-20 05:38:57,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 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) [2021-11-20 05:38:57,938 INFO L276 IsEmpty]: Start isEmpty. Operand 8847 states and 12654 transitions. [2021-11-20 05:38:57,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 05:38:57,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:57,944 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:57,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 05:38:57,945 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:57,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:57,945 INFO L85 PathProgramCache]: Analyzing trace with hash 905576252, now seen corresponding path program 1 times [2021-11-20 05:38:57,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:57,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868649377] [2021-11-20 05:38:57,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:57,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:38:58,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:58,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868649377] [2021-11-20 05:38:58,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868649377] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:58,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:58,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 05:38:58,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641512379] [2021-11-20 05:38:58,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:58,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:38:58,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:58,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:38:58,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:38:58,058 INFO L87 Difference]: Start difference. First operand 8847 states and 12654 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:02,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:39:02,522 INFO L93 Difference]: Finished difference Result 63293 states and 90581 transitions. [2021-11-20 05:39:02,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:39:02,523 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-20 05:39:02,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:39:02,592 INFO L225 Difference]: With dead ends: 63293 [2021-11-20 05:39:02,592 INFO L226 Difference]: Without dead ends: 54491 [2021-11-20 05:39:02,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:39:02,610 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 1550 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1550 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:39:02,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1550 Valid, 1131 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:39:02,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54491 states. [2021-11-20 05:39:04,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54491 to 17647. [2021-11-20 05:39:04,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17647 states, 17646 states have (on average 1.4261589028675055) internal successors, (25166), 17646 states have internal predecessors, (25166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:04,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17647 states to 17647 states and 25166 transitions. [2021-11-20 05:39:04,920 INFO L78 Accepts]: Start accepts. Automaton has 17647 states and 25166 transitions. Word has length 112 [2021-11-20 05:39:04,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:39:04,921 INFO L470 AbstractCegarLoop]: Abstraction has 17647 states and 25166 transitions. [2021-11-20 05:39:04,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:04,921 INFO L276 IsEmpty]: Start isEmpty. Operand 17647 states and 25166 transitions. [2021-11-20 05:39:04,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 05:39:04,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:39:04,927 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:39:04,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 05:39:04,927 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:39:04,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:39:04,927 INFO L85 PathProgramCache]: Analyzing trace with hash -818965810, now seen corresponding path program 1 times [2021-11-20 05:39:04,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:39:04,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915481350] [2021-11-20 05:39:04,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:39:04,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:39:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:39:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 05:39:05,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:39:05,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915481350] [2021-11-20 05:39:05,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915481350] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:39:05,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:39:05,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 05:39:05,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39636268] [2021-11-20 05:39:05,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:39:05,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:39:05,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:39:05,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:39:05,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:39:05,030 INFO L87 Difference]: Start difference. First operand 17647 states and 25166 transitions. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:10,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:39:10,572 INFO L93 Difference]: Finished difference Result 72093 states and 103093 transitions. [2021-11-20 05:39:10,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:39:10,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-20 05:39:10,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:39:10,653 INFO L225 Difference]: With dead ends: 72093 [2021-11-20 05:39:10,653 INFO L226 Difference]: Without dead ends: 63291 [2021-11-20 05:39:10,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:39:10,673 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 1441 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1441 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:39:10,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1441 Valid, 1178 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:39:10,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63291 states. [2021-11-20 05:39:13,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63291 to 30863. [2021-11-20 05:39:13,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30863 states, 30862 states have (on average 1.4209707731190462) internal successors, (43854), 30862 states have internal predecessors, (43854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:13,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30863 states to 30863 states and 43854 transitions. [2021-11-20 05:39:13,823 INFO L78 Accepts]: Start accepts. Automaton has 30863 states and 43854 transitions. Word has length 112 [2021-11-20 05:39:13,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:39:13,823 INFO L470 AbstractCegarLoop]: Abstraction has 30863 states and 43854 transitions. [2021-11-20 05:39:13,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:13,823 INFO L276 IsEmpty]: Start isEmpty. Operand 30863 states and 43854 transitions. [2021-11-20 05:39:13,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 05:39:13,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:39:13,830 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:39:13,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 05:39:13,830 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:39:13,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:39:13,831 INFO L85 PathProgramCache]: Analyzing trace with hash 334980296, now seen corresponding path program 1 times [2021-11-20 05:39:13,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:39:13,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779350038] [2021-11-20 05:39:13,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:39:13,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:39:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:39:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 05:39:13,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:39:13,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779350038] [2021-11-20 05:39:13,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779350038] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:39:13,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:39:13,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 05:39:13,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682774220] [2021-11-20 05:39:13,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:39:13,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:39:13,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:39:13,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:39:13,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:39:13,928 INFO L87 Difference]: Start difference. First operand 30863 states and 43854 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:21,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:39:21,709 INFO L93 Difference]: Finished difference Result 80893 states and 115605 transitions. [2021-11-20 05:39:21,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:39:21,710 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-20 05:39:21,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:39:21,801 INFO L225 Difference]: With dead ends: 80893 [2021-11-20 05:39:21,801 INFO L226 Difference]: Without dead ends: 72091 [2021-11-20 05:39:21,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:39:21,816 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 1273 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:39:21,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1273 Valid, 1252 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:39:21,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72091 states. [2021-11-20 05:39:26,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72091 to 39663. [2021-11-20 05:39:26,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39663 states, 39662 states have (on average 1.4211587917906308) internal successors, (56366), 39662 states have internal predecessors, (56366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:26,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39663 states to 39663 states and 56366 transitions. [2021-11-20 05:39:26,456 INFO L78 Accepts]: Start accepts. Automaton has 39663 states and 56366 transitions. Word has length 112 [2021-11-20 05:39:26,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:39:26,456 INFO L470 AbstractCegarLoop]: Abstraction has 39663 states and 56366 transitions. [2021-11-20 05:39:26,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:26,456 INFO L276 IsEmpty]: Start isEmpty. Operand 39663 states and 56366 transitions. [2021-11-20 05:39:26,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 05:39:26,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:39:26,465 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:39:26,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 05:39:26,466 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:39:26,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:39:26,466 INFO L85 PathProgramCache]: Analyzing trace with hash -522920382, now seen corresponding path program 1 times [2021-11-20 05:39:26,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:39:26,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305404204] [2021-11-20 05:39:26,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:39:26,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:39:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:39:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:39:26,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:39:26,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305404204] [2021-11-20 05:39:26,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305404204] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:39:26,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:39:26,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 05:39:26,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21910535] [2021-11-20 05:39:26,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:39:26,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:39:26,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:39:26,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:39:26,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:39:26,572 INFO L87 Difference]: Start difference. First operand 39663 states and 56366 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:35,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:39:35,646 INFO L93 Difference]: Finished difference Result 89693 states and 128117 transitions. [2021-11-20 05:39:35,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:39:35,646 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-20 05:39:35,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:39:35,791 INFO L225 Difference]: With dead ends: 89693 [2021-11-20 05:39:35,791 INFO L226 Difference]: Without dead ends: 80891 [2021-11-20 05:39:35,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:39:35,810 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 1268 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:39:35,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1268 Valid, 1352 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:39:35,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80891 states.