./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-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_4c7adf2d-4089-4aa8-b077-16bf7ceeaa4e/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c7adf2d-4089-4aa8-b077-16bf7ceeaa4e/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_4c7adf2d-4089-4aa8-b077-16bf7ceeaa4e/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c7adf2d-4089-4aa8-b077-16bf7ceeaa4e/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c7adf2d-4089-4aa8-b077-16bf7ceeaa4e/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_4c7adf2d-4089-4aa8-b077-16bf7ceeaa4e/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 59df1758127560236621fddca0cfb7b951a4ad9d8bd949539c1385f0c08fd544 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:19:42,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:19:42,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:19:42,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:19:42,251 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:19:42,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:19:42,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:19:42,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:19:42,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:19:42,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:19:42,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:19:42,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:19:42,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:19:42,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:19:42,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:19:42,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:19:42,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:19:42,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:19:42,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:19:42,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:19:42,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:19:42,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:19:42,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:19:42,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:19:42,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:19:42,313 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:19:42,314 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:19:42,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:19:42,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:19:42,318 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:19:42,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:19:42,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:19:42,322 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:19:42,323 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:19:42,324 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:19:42,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:19:42,325 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:19:42,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:19:42,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:19:42,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:19:42,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:19:42,328 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c7adf2d-4089-4aa8-b077-16bf7ceeaa4e/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:19:42,370 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:19:42,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:19:42,371 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:19:42,371 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:19:42,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:19:42,379 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:19:42,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:19:42,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:19:42,380 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:19:42,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:19:42,381 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:19:42,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:19:42,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:19:42,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:19:42,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:19:42,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:19:42,383 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:19:42,383 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:19:42,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:19:42,383 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:19:42,384 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:19:42,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:19:42,384 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:19:42,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:19:42,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:19:42,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:19:42,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:19:42,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:19:42,385 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:19:42,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:19:42,388 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:19:42,388 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:19:42,388 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:19:42,389 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:19:42,389 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_4c7adf2d-4089-4aa8-b077-16bf7ceeaa4e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c7adf2d-4089-4aa8-b077-16bf7ceeaa4e/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 59df1758127560236621fddca0cfb7b951a4ad9d8bd949539c1385f0c08fd544 [2021-11-20 07:19:42,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:19:42,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:19:42,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:19:42,708 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:19:42,708 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:19:42,710 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c7adf2d-4089-4aa8-b077-16bf7ceeaa4e/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2021-11-20 07:19:42,783 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c7adf2d-4089-4aa8-b077-16bf7ceeaa4e/bin/uautomizer-DQz5hQGWxF/data/76257d676/38bdd347b5394212862b0beda06142c0/FLAGebc4d5a4e [2021-11-20 07:19:43,399 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:19:43,400 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c7adf2d-4089-4aa8-b077-16bf7ceeaa4e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2021-11-20 07:19:43,411 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c7adf2d-4089-4aa8-b077-16bf7ceeaa4e/bin/uautomizer-DQz5hQGWxF/data/76257d676/38bdd347b5394212862b0beda06142c0/FLAGebc4d5a4e [2021-11-20 07:19:43,666 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c7adf2d-4089-4aa8-b077-16bf7ceeaa4e/bin/uautomizer-DQz5hQGWxF/data/76257d676/38bdd347b5394212862b0beda06142c0 [2021-11-20 07:19:43,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:19:43,670 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:19:43,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:19:43,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:19:43,680 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:19:43,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:19:43" (1/1) ... [2021-11-20 07:19:43,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7df7e97b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:43, skipping insertion in model container [2021-11-20 07:19:43,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:19:43" (1/1) ... [2021-11-20 07:19:43,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:19:43,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:19:44,096 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_4c7adf2d-4089-4aa8-b077-16bf7ceeaa4e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c[10527,10540] [2021-11-20 07:19:44,177 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:19:44,192 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:19:44,316 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_4c7adf2d-4089-4aa8-b077-16bf7ceeaa4e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c[10527,10540] [2021-11-20 07:19:44,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:19:44,400 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:19:44,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:44 WrapperNode [2021-11-20 07:19:44,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:19:44,402 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:19:44,402 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:19:44,402 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:19:44,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:44" (1/1) ... [2021-11-20 07:19:44,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:44" (1/1) ... [2021-11-20 07:19:44,507 INFO L137 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 843 [2021-11-20 07:19:44,507 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:19:44,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:19:44,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:19:44,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:19:44,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:44" (1/1) ... [2021-11-20 07:19:44,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:44" (1/1) ... [2021-11-20 07:19:44,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:44" (1/1) ... [2021-11-20 07:19:44,530 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:44" (1/1) ... [2021-11-20 07:19:44,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:44" (1/1) ... [2021-11-20 07:19:44,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:44" (1/1) ... [2021-11-20 07:19:44,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:44" (1/1) ... [2021-11-20 07:19:44,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:19:44,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:19:44,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:19:44,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:19:44,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:44" (1/1) ... [2021-11-20 07:19:44,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:19:44,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c7adf2d-4089-4aa8-b077-16bf7ceeaa4e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:19:44,680 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c7adf2d-4089-4aa8-b077-16bf7ceeaa4e/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:19:44,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c7adf2d-4089-4aa8-b077-16bf7ceeaa4e/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:19:44,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:19:44,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:19:44,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:19:44,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:19:44,924 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:19:44,925 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:19:45,704 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:19:45,715 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:19:45,719 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 07:19:45,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:19:45 BoogieIcfgContainer [2021-11-20 07:19:45,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:19:45,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:19:45,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:19:45,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:19:45,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:19:43" (1/3) ... [2021-11-20 07:19:45,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e19d056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:19:45, skipping insertion in model container [2021-11-20 07:19:45,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:44" (2/3) ... [2021-11-20 07:19:45,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e19d056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:19:45, skipping insertion in model container [2021-11-20 07:19:45,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:19:45" (3/3) ... [2021-11-20 07:19:45,733 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2021-11-20 07:19:45,739 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:19:45,739 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:19:45,808 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:19:45,813 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 07:19:45,814 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:19:45,836 INFO L276 IsEmpty]: Start isEmpty. Operand has 202 states, 200 states have (on average 1.765) internal successors, (353), 201 states have internal predecessors, (353), 0 states have call successors, (0), 0 states 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 07:19:45,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-20 07:19:45,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:45,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:45,851 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:45,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:45,856 INFO L85 PathProgramCache]: Analyzing trace with hash -2055920229, now seen corresponding path program 1 times [2021-11-20 07:19:45,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:45,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509566897] [2021-11-20 07:19:45,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:45,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:46,574 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 07:19:46,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:46,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509566897] [2021-11-20 07:19:46,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509566897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:46,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:46,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 07:19:46,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731256138] [2021-11-20 07:19:46,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:46,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:19:46,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:46,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:19:46,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:19:46,630 INFO L87 Difference]: Start difference. First operand has 202 states, 200 states have (on average 1.765) internal successors, (353), 201 states have internal predecessors, (353), 0 states have call successors, (0), 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 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:19:47,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:47,572 INFO L93 Difference]: Finished difference Result 1459 states and 2342 transitions. [2021-11-20 07:19:47,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:19:47,574 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-20 07:19:47,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:47,610 INFO L225 Difference]: With dead ends: 1459 [2021-11-20 07:19:47,611 INFO L226 Difference]: Without dead ends: 1333 [2021-11-20 07:19:47,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:19:47,619 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 2676 mSDsluCounter, 6172 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2676 SdHoareTripleChecker+Valid, 7040 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:47,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2676 Valid, 7040 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:19:47,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2021-11-20 07:19:47,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 304. [2021-11-20 07:19:47,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.4422442244224423) internal successors, (437), 303 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:19:47,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 437 transitions. [2021-11-20 07:19:47,702 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 437 transitions. Word has length 108 [2021-11-20 07:19:47,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:47,703 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 437 transitions. [2021-11-20 07:19:47,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:19:47,703 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 437 transitions. [2021-11-20 07:19:47,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-20 07:19:47,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:47,715 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:47,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:19:47,715 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:47,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:47,716 INFO L85 PathProgramCache]: Analyzing trace with hash -924120728, now seen corresponding path program 1 times [2021-11-20 07:19:47,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:47,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081700996] [2021-11-20 07:19:47,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:47,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:47,912 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 07:19:47,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:47,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081700996] [2021-11-20 07:19:47,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081700996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:47,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:47,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 07:19:47,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884580469] [2021-11-20 07:19:47,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:47,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:19:47,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:47,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:19:47,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:19:47,916 INFO L87 Difference]: Start difference. First operand 304 states and 437 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 07:19:48,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:48,403 INFO L93 Difference]: Finished difference Result 1560 states and 2419 transitions. [2021-11-20 07:19:48,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:19:48,405 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-11-20 07:19:48,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:48,416 INFO L225 Difference]: With dead ends: 1560 [2021-11-20 07:19:48,416 INFO L226 Difference]: Without dead ends: 1400 [2021-11-20 07:19:48,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:19:48,427 INFO L933 BasicCegarLoop]: 831 mSDtfsCounter, 1946 mSDsluCounter, 3187 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1946 SdHoareTripleChecker+Valid, 4018 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:48,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1946 Valid, 4018 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:19:48,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-11-20 07:19:48,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 483. [2021-11-20 07:19:48,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.495850622406639) internal successors, (721), 482 states have internal predecessors, (721), 0 states have call successors, (0), 0 states 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 07:19:48,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 721 transitions. [2021-11-20 07:19:48,495 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 721 transitions. Word has length 110 [2021-11-20 07:19:48,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:48,495 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 721 transitions. [2021-11-20 07:19:48,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 07:19:48,496 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 721 transitions. [2021-11-20 07:19:48,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-20 07:19:48,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:48,500 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:48,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:19:48,501 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:48,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:48,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1292919580, now seen corresponding path program 1 times [2021-11-20 07:19:48,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:48,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291290232] [2021-11-20 07:19:48,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:48,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:48,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:48,648 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 07:19:48,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:48,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291290232] [2021-11-20 07:19:48,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291290232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:48,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:48,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 07:19:48,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128836552] [2021-11-20 07:19:48,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:48,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:19:48,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:48,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:19:48,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:19:48,652 INFO L87 Difference]: Start difference. First operand 483 states and 721 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 07:19:49,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:49,130 INFO L93 Difference]: Finished difference Result 1739 states and 2703 transitions. [2021-11-20 07:19:49,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:19:49,131 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-11-20 07:19:49,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:49,144 INFO L225 Difference]: With dead ends: 1739 [2021-11-20 07:19:49,144 INFO L226 Difference]: Without dead ends: 1579 [2021-11-20 07:19:49,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:19:49,154 INFO L933 BasicCegarLoop]: 722 mSDtfsCounter, 1941 mSDsluCounter, 2345 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1941 SdHoareTripleChecker+Valid, 3067 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:49,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1941 Valid, 3067 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:19:49,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-11-20 07:19:49,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 741. [2021-11-20 07:19:49,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 1.527027027027027) internal successors, (1130), 740 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states 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 07:19:49,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1130 transitions. [2021-11-20 07:19:49,250 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1130 transitions. Word has length 110 [2021-11-20 07:19:49,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:49,251 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 1130 transitions. [2021-11-20 07:19:49,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 07:19:49,252 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1130 transitions. [2021-11-20 07:19:49,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-20 07:19:49,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:49,261 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:49,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:19:49,262 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:49,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:49,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1295133060, now seen corresponding path program 1 times [2021-11-20 07:19:49,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:49,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501483067] [2021-11-20 07:19:49,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:49,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:49,478 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 07:19:49,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:49,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501483067] [2021-11-20 07:19:49,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501483067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:49,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:49,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 07:19:49,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972623026] [2021-11-20 07:19:49,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:49,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:19:49,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:49,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:19:49,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:19:49,481 INFO L87 Difference]: Start difference. First operand 741 states and 1130 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 07:19:49,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:49,979 INFO L93 Difference]: Finished difference Result 1913 states and 2979 transitions. [2021-11-20 07:19:49,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:19:49,981 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-11-20 07:19:49,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:49,991 INFO L225 Difference]: With dead ends: 1913 [2021-11-20 07:19:49,992 INFO L226 Difference]: Without dead ends: 1753 [2021-11-20 07:19:49,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:19:50,001 INFO L933 BasicCegarLoop]: 613 mSDtfsCounter, 2145 mSDsluCounter, 2303 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2145 SdHoareTripleChecker+Valid, 2916 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:50,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2145 Valid, 2916 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:19:50,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2021-11-20 07:19:50,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 915. [2021-11-20 07:19:50,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 1.538293216630197) internal successors, (1406), 914 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states 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 07:19:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1406 transitions. [2021-11-20 07:19:50,118 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1406 transitions. Word has length 110 [2021-11-20 07:19:50,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:50,118 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 1406 transitions. [2021-11-20 07:19:50,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 07:19:50,119 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1406 transitions. [2021-11-20 07:19:50,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-20 07:19:50,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:50,120 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:50,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 07:19:50,125 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:50,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:50,128 INFO L85 PathProgramCache]: Analyzing trace with hash 722932112, now seen corresponding path program 1 times [2021-11-20 07:19:50,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:50,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896217692] [2021-11-20 07:19:50,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:50,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:50,327 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 07:19:50,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:50,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896217692] [2021-11-20 07:19:50,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896217692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:50,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:50,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 07:19:50,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565525336] [2021-11-20 07:19:50,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:50,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:19:50,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:50,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:19:50,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:19:50,330 INFO L87 Difference]: Start difference. First operand 915 states and 1406 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 07:19:50,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:50,818 INFO L93 Difference]: Finished difference Result 2082 states and 3247 transitions. [2021-11-20 07:19:50,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:19:50,819 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-11-20 07:19:50,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:50,830 INFO L225 Difference]: With dead ends: 2082 [2021-11-20 07:19:50,831 INFO L226 Difference]: Without dead ends: 1922 [2021-11-20 07:19:50,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:19:50,832 INFO L933 BasicCegarLoop]: 496 mSDtfsCounter, 2347 mSDsluCounter, 2189 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2347 SdHoareTripleChecker+Valid, 2685 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:50,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2347 Valid, 2685 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:19:50,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2021-11-20 07:19:50,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1079. [2021-11-20 07:19:50,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 1.5454545454545454) internal successors, (1666), 1078 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states 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 07:19:50,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1666 transitions. [2021-11-20 07:19:50,952 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1666 transitions. Word has length 110 [2021-11-20 07:19:50,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:50,953 INFO L470 AbstractCegarLoop]: Abstraction has 1079 states and 1666 transitions. [2021-11-20 07:19:50,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 07:19:50,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1666 transitions. [2021-11-20 07:19:50,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-20 07:19:50,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:50,955 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:50,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 07:19:50,955 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:50,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:50,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1525369156, now seen corresponding path program 1 times [2021-11-20 07:19:50,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:50,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68731556] [2021-11-20 07:19:50,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:50,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:51,088 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 07:19:51,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:51,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68731556] [2021-11-20 07:19:51,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68731556] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:51,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:51,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 07:19:51,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569221468] [2021-11-20 07:19:51,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:51,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:19:51,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:51,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:19:51,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:19:51,090 INFO L87 Difference]: Start difference. First operand 1079 states and 1666 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 07:19:51,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:51,558 INFO L93 Difference]: Finished difference Result 2241 states and 3499 transitions. [2021-11-20 07:19:51,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:19:51,558 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-11-20 07:19:51,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:51,571 INFO L225 Difference]: With dead ends: 2241 [2021-11-20 07:19:51,571 INFO L226 Difference]: Without dead ends: 2081 [2021-11-20 07:19:51,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:19:51,573 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 2850 mSDsluCounter, 2185 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2850 SdHoareTripleChecker+Valid, 2572 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:51,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2850 Valid, 2572 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:19:51,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2021-11-20 07:19:51,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 1238. [2021-11-20 07:19:51,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 1.5505254648342766) internal successors, (1918), 1237 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states 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 07:19:51,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 1918 transitions. [2021-11-20 07:19:51,720 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 1918 transitions. Word has length 110 [2021-11-20 07:19:51,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:51,721 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 1918 transitions. [2021-11-20 07:19:51,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 07:19:51,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 1918 transitions. [2021-11-20 07:19:51,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-20 07:19:51,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:51,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:51,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 07:19:51,723 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:51,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:51,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1186267839, now seen corresponding path program 1 times [2021-11-20 07:19:51,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:51,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716901164] [2021-11-20 07:19:51,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:51,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:52,022 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 07:19:52,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:52,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716901164] [2021-11-20 07:19:52,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716901164] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:52,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:52,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 07:19:52,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127455249] [2021-11-20 07:19:52,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:52,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:19:52,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:52,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:19:52,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:19:52,025 INFO L87 Difference]: Start difference. First operand 1238 states and 1918 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 07:19:52,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:52,525 INFO L93 Difference]: Finished difference Result 2269 states and 3552 transitions. [2021-11-20 07:19:52,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:19:52,525 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-11-20 07:19:52,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:52,534 INFO L225 Difference]: With dead ends: 2269 [2021-11-20 07:19:52,534 INFO L226 Difference]: Without dead ends: 1240 [2021-11-20 07:19:52,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:19:52,537 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 677 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:52,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 1394 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:19:52,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-11-20 07:19:52,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1238. [2021-11-20 07:19:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 1.5448666127728374) internal successors, (1911), 1237 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states 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 07:19:52,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 1911 transitions. [2021-11-20 07:19:52,706 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 1911 transitions. Word has length 110 [2021-11-20 07:19:52,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:52,707 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 1911 transitions. [2021-11-20 07:19:52,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 07:19:52,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 1911 transitions. [2021-11-20 07:19:52,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-20 07:19:52,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:52,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:52,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 07:19:52,710 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:52,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:52,711 INFO L85 PathProgramCache]: Analyzing trace with hash 943143488, now seen corresponding path program 1 times [2021-11-20 07:19:52,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:52,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215981295] [2021-11-20 07:19:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:52,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:52,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:52,776 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 07:19:52,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:52,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215981295] [2021-11-20 07:19:52,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215981295] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:52,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:52,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:19:52,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291140195] [2021-11-20 07:19:52,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:52,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:19:52,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:52,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:19:52,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:19:52,780 INFO L87 Difference]: Start difference. First operand 1238 states and 1911 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 07:19:53,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:53,039 INFO L93 Difference]: Finished difference Result 3212 states and 5022 transitions. [2021-11-20 07:19:53,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:19:53,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-11-20 07:19:53,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:53,053 INFO L225 Difference]: With dead ends: 3212 [2021-11-20 07:19:53,053 INFO L226 Difference]: Without dead ends: 2183 [2021-11-20 07:19:53,055 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 07:19:53,056 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 115 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:53,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 640 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:19:53,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2183 states. [2021-11-20 07:19:53,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2183 to 2181. [2021-11-20 07:19:53,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 1.5454128440366972) internal successors, (3369), 2180 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states 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 07:19:53,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 3369 transitions. [2021-11-20 07:19:53,293 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 3369 transitions. Word has length 110 [2021-11-20 07:19:53,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:53,293 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 3369 transitions. [2021-11-20 07:19:53,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 07:19:53,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 3369 transitions. [2021-11-20 07:19:53,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-20 07:19:53,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:53,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:53,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 07:19:53,298 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:53,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:53,299 INFO L85 PathProgramCache]: Analyzing trace with hash 2091479554, now seen corresponding path program 1 times [2021-11-20 07:19:53,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:53,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420476913] [2021-11-20 07:19:53,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:53,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:53,457 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 07:19:53,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:53,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420476913] [2021-11-20 07:19:53,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420476913] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:53,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:53,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 07:19:53,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643382640] [2021-11-20 07:19:53,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:53,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:19:53,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:53,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:19:53,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:19:53,460 INFO L87 Difference]: Start difference. First operand 2181 states and 3369 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 07:19:54,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:54,131 INFO L93 Difference]: Finished difference Result 4357 states and 6769 transitions. [2021-11-20 07:19:54,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:19:54,132 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-11-20 07:19:54,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:54,154 INFO L225 Difference]: With dead ends: 4357 [2021-11-20 07:19:54,154 INFO L226 Difference]: Without dead ends: 4052 [2021-11-20 07:19:54,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:19:54,159 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 2152 mSDsluCounter, 2375 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2152 SdHoareTripleChecker+Valid, 2863 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:54,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2152 Valid, 2863 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:19:54,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4052 states. [2021-11-20 07:19:54,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4052 to 2484. [2021-11-20 07:19:54,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2484 states, 2483 states have (on average 1.5477245267821185) internal successors, (3843), 2483 states have internal predecessors, (3843), 0 states have call successors, (0), 0 states 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 07:19:54,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2484 states to 2484 states and 3843 transitions. [2021-11-20 07:19:54,509 INFO L78 Accepts]: Start accepts. Automaton has 2484 states and 3843 transitions. Word has length 110 [2021-11-20 07:19:54,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:54,509 INFO L470 AbstractCegarLoop]: Abstraction has 2484 states and 3843 transitions. [2021-11-20 07:19:54,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 07:19:54,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2484 states and 3843 transitions. [2021-11-20 07:19:54,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-20 07:19:54,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:54,512 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:54,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 07:19:54,512 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:54,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:54,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1690423504, now seen corresponding path program 1 times [2021-11-20 07:19:54,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:54,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422773594] [2021-11-20 07:19:54,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:54,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:54,641 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 07:19:54,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:54,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422773594] [2021-11-20 07:19:54,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422773594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:54,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:54,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 07:19:54,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592329661] [2021-11-20 07:19:54,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:54,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:19:54,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:54,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:19:54,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:19:54,648 INFO L87 Difference]: Start difference. First operand 2484 states and 3843 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 07:19:55,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:55,380 INFO L93 Difference]: Finished difference Result 4666 states and 7252 transitions. [2021-11-20 07:19:55,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:19:55,381 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-11-20 07:19:55,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:55,406 INFO L225 Difference]: With dead ends: 4666 [2021-11-20 07:19:55,406 INFO L226 Difference]: Without dead ends: 4361 [2021-11-20 07:19:55,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:19:55,409 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 2200 mSDsluCounter, 3271 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2200 SdHoareTripleChecker+Valid, 3676 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:55,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2200 Valid, 3676 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:19:55,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2021-11-20 07:19:55,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 2798. [2021-11-20 07:19:55,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 1.5495173400071505) internal successors, (4334), 2797 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states 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 07:19:55,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 4334 transitions. [2021-11-20 07:19:55,742 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 4334 transitions. Word has length 110 [2021-11-20 07:19:55,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:55,743 INFO L470 AbstractCegarLoop]: Abstraction has 2798 states and 4334 transitions. [2021-11-20 07:19:55,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 07:19:55,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 4334 transitions. [2021-11-20 07:19:55,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 07:19:55,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:55,746 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:19:55,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 07:19:55,746 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:55,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:55,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1882311825, now seen corresponding path program 1 times [2021-11-20 07:19:55,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:55,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17765040] [2021-11-20 07:19:55,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:55,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:55,866 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 07:19:55,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:55,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17765040] [2021-11-20 07:19:55,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17765040] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:55,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:55,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:19:55,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854576469] [2021-11-20 07:19:55,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:55,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:19:55,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:55,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:19:55,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:19:55,869 INFO L87 Difference]: Start difference. First operand 2798 states and 4334 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 07:19:56,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:56,713 INFO L93 Difference]: Finished difference Result 8214 states and 12793 transitions. [2021-11-20 07:19:56,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:19:56,714 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-20 07:19:56,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:56,745 INFO L225 Difference]: With dead ends: 8214 [2021-11-20 07:19:56,746 INFO L226 Difference]: Without dead ends: 5473 [2021-11-20 07:19:56,751 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 07:19:56,751 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 1070 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1070 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:56,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1070 Valid, 237 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:19:56,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2021-11-20 07:19:57,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 5471. [2021-11-20 07:19:57,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5471 states, 5470 states have (on average 1.5504570383912248) internal successors, (8481), 5470 states have internal predecessors, (8481), 0 states have call successors, (0), 0 states 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 07:19:57,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5471 states to 5471 states and 8481 transitions. [2021-11-20 07:19:57,324 INFO L78 Accepts]: Start accepts. Automaton has 5471 states and 8481 transitions. Word has length 111 [2021-11-20 07:19:57,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:57,324 INFO L470 AbstractCegarLoop]: Abstraction has 5471 states and 8481 transitions. [2021-11-20 07:19:57,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 07:19:57,325 INFO L276 IsEmpty]: Start isEmpty. Operand 5471 states and 8481 transitions. [2021-11-20 07:19:57,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 07:19:57,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:57,327 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:19:57,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 07:19:57,328 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:57,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:57,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1093414131, now seen corresponding path program 1 times [2021-11-20 07:19:57,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:57,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092803689] [2021-11-20 07:19:57,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:57,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:57,406 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 07:19:57,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:57,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092803689] [2021-11-20 07:19:57,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092803689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:57,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:57,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:19:57,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755010011] [2021-11-20 07:19:57,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:57,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:19:57,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:57,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:19:57,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:19:57,409 INFO L87 Difference]: Start difference. First operand 5471 states and 8481 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 07:19:58,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:58,088 INFO L93 Difference]: Finished difference Result 10869 states and 16885 transitions. [2021-11-20 07:19:58,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:19:58,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 07:19:58,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:58,101 INFO L225 Difference]: With dead ends: 10869 [2021-11-20 07:19:58,101 INFO L226 Difference]: Without dead ends: 5471 [2021-11-20 07:19:58,108 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 07:19:58,109 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 690 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:58,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 181 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:19:58,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2021-11-20 07:19:58,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 5471. [2021-11-20 07:19:58,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5471 states, 5470 states have (on average 1.5378427787934186) internal successors, (8412), 5470 states have internal predecessors, (8412), 0 states have call successors, (0), 0 states 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 07:19:58,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5471 states to 5471 states and 8412 transitions. [2021-11-20 07:19:58,776 INFO L78 Accepts]: Start accepts. Automaton has 5471 states and 8412 transitions. Word has length 112 [2021-11-20 07:19:58,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:58,777 INFO L470 AbstractCegarLoop]: Abstraction has 5471 states and 8412 transitions. [2021-11-20 07:19:58,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 07:19:58,777 INFO L276 IsEmpty]: Start isEmpty. Operand 5471 states and 8412 transitions. [2021-11-20 07:19:58,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 07:19:58,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:58,781 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:19:58,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 07:19:58,781 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:58,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:58,782 INFO L85 PathProgramCache]: Analyzing trace with hash 596896751, now seen corresponding path program 1 times [2021-11-20 07:19:58,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:58,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959315699] [2021-11-20 07:19:58,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:58,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:58,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:58,861 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 07:19:58,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:58,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959315699] [2021-11-20 07:19:58,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959315699] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:58,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:58,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:19:58,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603382104] [2021-11-20 07:19:58,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:58,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:19:58,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:58,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:19:58,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:19:58,865 INFO L87 Difference]: Start difference. First operand 5471 states and 8412 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 07:19:59,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:59,567 INFO L93 Difference]: Finished difference Result 10861 states and 16738 transitions. [2021-11-20 07:19:59,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:19:59,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-20 07:19:59,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:59,578 INFO L225 Difference]: With dead ends: 10861 [2021-11-20 07:19:59,578 INFO L226 Difference]: Without dead ends: 5471 [2021-11-20 07:19:59,586 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 07:19:59,587 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 664 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:59,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 201 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:19:59,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2021-11-20 07:20:00,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 5471. [2021-11-20 07:20:00,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5471 states, 5470 states have (on average 1.5252285191956125) internal successors, (8343), 5470 states have internal predecessors, (8343), 0 states have call successors, (0), 0 states 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 07:20:00,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5471 states to 5471 states and 8343 transitions. [2021-11-20 07:20:00,135 INFO L78 Accepts]: Start accepts. Automaton has 5471 states and 8343 transitions. Word has length 113 [2021-11-20 07:20:00,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:00,136 INFO L470 AbstractCegarLoop]: Abstraction has 5471 states and 8343 transitions. [2021-11-20 07:20:00,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 07:20:00,136 INFO L276 IsEmpty]: Start isEmpty. Operand 5471 states and 8343 transitions. [2021-11-20 07:20:00,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-20 07:20:00,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:00,139 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:00,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 07:20:00,139 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:00,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:00,140 INFO L85 PathProgramCache]: Analyzing trace with hash 914047091, now seen corresponding path program 1 times [2021-11-20 07:20:00,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:00,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355632363] [2021-11-20 07:20:00,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:00,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:00,230 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 07:20:00,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:00,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355632363] [2021-11-20 07:20:00,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355632363] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:00,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:00,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:20:00,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897337430] [2021-11-20 07:20:00,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:00,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:20:00,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:00,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:20:00,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:20:00,233 INFO L87 Difference]: Start difference. First operand 5471 states and 8343 transitions. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 07:20:00,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:00,857 INFO L93 Difference]: Finished difference Result 10873 states and 16614 transitions. [2021-11-20 07:20:00,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:20:00,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-20 07:20:00,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:00,869 INFO L225 Difference]: With dead ends: 10873 [2021-11-20 07:20:00,869 INFO L226 Difference]: Without dead ends: 5471 [2021-11-20 07:20:00,877 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 07:20:00,878 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 689 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:00,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [689 Valid, 173 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:20:00,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2021-11-20 07:20:01,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 5471. [2021-11-20 07:20:01,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5471 states, 5470 states have (on average 1.5126142595978063) internal successors, (8274), 5470 states have internal predecessors, (8274), 0 states have call successors, (0), 0 states 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 07:20:01,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5471 states to 5471 states and 8274 transitions. [2021-11-20 07:20:01,516 INFO L78 Accepts]: Start accepts. Automaton has 5471 states and 8274 transitions. Word has length 114 [2021-11-20 07:20:01,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:01,516 INFO L470 AbstractCegarLoop]: Abstraction has 5471 states and 8274 transitions. [2021-11-20 07:20:01,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 07:20:01,517 INFO L276 IsEmpty]: Start isEmpty. Operand 5471 states and 8274 transitions. [2021-11-20 07:20:01,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-20 07:20:01,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:01,519 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:01,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 07:20:01,520 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:01,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:01,520 INFO L85 PathProgramCache]: Analyzing trace with hash -932538653, now seen corresponding path program 1 times [2021-11-20 07:20:01,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:01,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373620070] [2021-11-20 07:20:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:01,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:01,625 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 07:20:01,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:01,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373620070] [2021-11-20 07:20:01,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373620070] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:01,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:01,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:20:01,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065638235] [2021-11-20 07:20:01,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:01,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:20:01,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:01,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:20:01,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:20:01,628 INFO L87 Difference]: Start difference. First operand 5471 states and 8274 transitions. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:20:02,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:02,391 INFO L93 Difference]: Finished difference Result 10881 states and 16486 transitions. [2021-11-20 07:20:02,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:20:02,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-11-20 07:20:02,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:02,403 INFO L225 Difference]: With dead ends: 10881 [2021-11-20 07:20:02,403 INFO L226 Difference]: Without dead ends: 5471 [2021-11-20 07:20:02,410 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 07:20:02,411 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 705 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:02,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 157 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:20:02,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2021-11-20 07:20:02,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 5471. [2021-11-20 07:20:02,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5471 states, 5470 states have (on average 1.5) internal successors, (8205), 5470 states have internal predecessors, (8205), 0 states have call successors, (0), 0 states 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 07:20:02,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5471 states to 5471 states and 8205 transitions. [2021-11-20 07:20:02,969 INFO L78 Accepts]: Start accepts. Automaton has 5471 states and 8205 transitions. Word has length 115 [2021-11-20 07:20:02,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:02,970 INFO L470 AbstractCegarLoop]: Abstraction has 5471 states and 8205 transitions. [2021-11-20 07:20:02,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:20:02,970 INFO L276 IsEmpty]: Start isEmpty. Operand 5471 states and 8205 transitions. [2021-11-20 07:20:02,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 07:20:02,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:02,973 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:02,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 07:20:02,973 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:02,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:02,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1866315149, now seen corresponding path program 1 times [2021-11-20 07:20:02,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:02,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978748922] [2021-11-20 07:20:02,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:02,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:03,037 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 07:20:03,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:03,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978748922] [2021-11-20 07:20:03,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978748922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:03,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:03,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:20:03,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799566005] [2021-11-20 07:20:03,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:03,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:20:03,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:03,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:20:03,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:20:03,040 INFO L87 Difference]: Start difference. First operand 5471 states and 8205 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 07:20:03,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:03,756 INFO L93 Difference]: Finished difference Result 10877 states and 16344 transitions. [2021-11-20 07:20:03,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:20:03,757 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2021-11-20 07:20:03,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:03,767 INFO L225 Difference]: With dead ends: 10877 [2021-11-20 07:20:03,767 INFO L226 Difference]: Without dead ends: 5471 [2021-11-20 07:20:03,776 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 07:20:03,776 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 687 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:03,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [687 Valid, 165 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:20:03,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2021-11-20 07:20:04,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 5471. [2021-11-20 07:20:04,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5471 states, 5470 states have (on average 1.4873857404021937) internal successors, (8136), 5470 states have internal predecessors, (8136), 0 states have call successors, (0), 0 states 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 07:20:04,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5471 states to 5471 states and 8136 transitions. [2021-11-20 07:20:04,377 INFO L78 Accepts]: Start accepts. Automaton has 5471 states and 8136 transitions. Word has length 116 [2021-11-20 07:20:04,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:04,377 INFO L470 AbstractCegarLoop]: Abstraction has 5471 states and 8136 transitions. [2021-11-20 07:20:04,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 07:20:04,378 INFO L276 IsEmpty]: Start isEmpty. Operand 5471 states and 8136 transitions. [2021-11-20 07:20:04,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-20 07:20:04,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:04,380 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:04,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 07:20:04,380 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:04,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:04,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1607436073, now seen corresponding path program 1 times [2021-11-20 07:20:04,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:04,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138448210] [2021-11-20 07:20:04,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:04,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:04,478 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 07:20:04,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:04,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138448210] [2021-11-20 07:20:04,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138448210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:04,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:04,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:20:04,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356602474] [2021-11-20 07:20:04,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:04,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:20:04,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:04,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:20:04,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:20:04,480 INFO L87 Difference]: Start difference. First operand 5471 states and 8136 transitions. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 07:20:05,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:05,245 INFO L93 Difference]: Finished difference Result 10865 states and 16194 transitions. [2021-11-20 07:20:05,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:20:05,246 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2021-11-20 07:20:05,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:05,256 INFO L225 Difference]: With dead ends: 10865 [2021-11-20 07:20:05,256 INFO L226 Difference]: Without dead ends: 5471 [2021-11-20 07:20:05,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:20:05,265 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 645 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:05,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 189 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:20:05,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2021-11-20 07:20:06,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 5471. [2021-11-20 07:20:06,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5471 states, 5470 states have (on average 1.4747714808043875) internal successors, (8067), 5470 states have internal predecessors, (8067), 0 states have call successors, (0), 0 states 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 07:20:06,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5471 states to 5471 states and 8067 transitions. [2021-11-20 07:20:06,041 INFO L78 Accepts]: Start accepts. Automaton has 5471 states and 8067 transitions. Word has length 117 [2021-11-20 07:20:06,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:06,042 INFO L470 AbstractCegarLoop]: Abstraction has 5471 states and 8067 transitions. [2021-11-20 07:20:06,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 07:20:06,042 INFO L276 IsEmpty]: Start isEmpty. Operand 5471 states and 8067 transitions. [2021-11-20 07:20:06,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-20 07:20:06,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:06,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:06,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 07:20:06,045 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:06,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:06,045 INFO L85 PathProgramCache]: Analyzing trace with hash 154166167, now seen corresponding path program 1 times [2021-11-20 07:20:06,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:06,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131289199] [2021-11-20 07:20:06,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:06,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:06,141 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 07:20:06,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:06,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131289199] [2021-11-20 07:20:06,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131289199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:06,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:06,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:20:06,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442467527] [2021-11-20 07:20:06,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:06,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:20:06,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:06,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:20:06,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:20:06,144 INFO L87 Difference]: Start difference. First operand 5471 states and 8067 transitions. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 07:20:07,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:07,640 INFO L93 Difference]: Finished difference Result 9141 states and 13482 transitions. [2021-11-20 07:20:07,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:20:07,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 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 118 [2021-11-20 07:20:07,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:07,650 INFO L225 Difference]: With dead ends: 9141 [2021-11-20 07:20:07,650 INFO L226 Difference]: Without dead ends: 9139 [2021-11-20 07:20:07,651 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 07:20:07,652 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 228 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:07,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 1063 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:20:07,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9139 states. [2021-11-20 07:20:08,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9139 to 5503. [2021-11-20 07:20:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5503 states, 5502 states have (on average 1.4687386404943656) internal successors, (8081), 5502 states have internal predecessors, (8081), 0 states have call successors, (0), 0 states 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 07:20:08,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5503 states to 5503 states and 8081 transitions. [2021-11-20 07:20:08,474 INFO L78 Accepts]: Start accepts. Automaton has 5503 states and 8081 transitions. Word has length 118 [2021-11-20 07:20:08,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:08,474 INFO L470 AbstractCegarLoop]: Abstraction has 5503 states and 8081 transitions. [2021-11-20 07:20:08,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 07:20:08,474 INFO L276 IsEmpty]: Start isEmpty. Operand 5503 states and 8081 transitions. [2021-11-20 07:20:08,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-20 07:20:08,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:08,477 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:08,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 07:20:08,477 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:08,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:08,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1441850003, now seen corresponding path program 1 times [2021-11-20 07:20:08,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:08,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114993060] [2021-11-20 07:20:08,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:08,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:08,582 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 07:20:08,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:08,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114993060] [2021-11-20 07:20:08,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114993060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:08,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:08,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:20:08,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783055919] [2021-11-20 07:20:08,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:08,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:20:08,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:08,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:20:08,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:20:08,585 INFO L87 Difference]: Start difference. First operand 5503 states and 8081 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 07:20:09,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:09,602 INFO L93 Difference]: Finished difference Result 13044 states and 19190 transitions. [2021-11-20 07:20:09,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:20:09,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 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 118 [2021-11-20 07:20:09,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:09,610 INFO L225 Difference]: With dead ends: 13044 [2021-11-20 07:20:09,610 INFO L226 Difference]: Without dead ends: 7858 [2021-11-20 07:20:09,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:20:09,615 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 219 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:09,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 600 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:20:09,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7858 states. [2021-11-20 07:20:10,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7858 to 7856. [2021-11-20 07:20:10,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7856 states, 7855 states have (on average 1.4646721833227243) internal successors, (11505), 7855 states have internal predecessors, (11505), 0 states have call successors, (0), 0 states 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 07:20:10,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7856 states to 7856 states and 11505 transitions. [2021-11-20 07:20:10,708 INFO L78 Accepts]: Start accepts. Automaton has 7856 states and 11505 transitions. Word has length 118 [2021-11-20 07:20:10,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:10,708 INFO L470 AbstractCegarLoop]: Abstraction has 7856 states and 11505 transitions. [2021-11-20 07:20:10,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 07:20:10,708 INFO L276 IsEmpty]: Start isEmpty. Operand 7856 states and 11505 transitions. [2021-11-20 07:20:10,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-20 07:20:10,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:10,710 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:10,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 07:20:10,711 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:10,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:10,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1554016695, now seen corresponding path program 1 times [2021-11-20 07:20:10,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:10,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678600731] [2021-11-20 07:20:10,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:10,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:10,904 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 07:20:10,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:10,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678600731] [2021-11-20 07:20:10,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678600731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:10,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:10,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 07:20:10,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627571333] [2021-11-20 07:20:10,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:10,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:20:10,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:10,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:20:10,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:20:10,907 INFO L87 Difference]: Start difference. First operand 7856 states and 11505 transitions. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 9 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 07:20:13,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:13,793 INFO L93 Difference]: Finished difference Result 23215 states and 33937 transitions. [2021-11-20 07:20:13,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:20:13,793 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 9 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2021-11-20 07:20:13,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:13,819 INFO L225 Difference]: With dead ends: 23215 [2021-11-20 07:20:13,819 INFO L226 Difference]: Without dead ends: 15663 [2021-11-20 07:20:13,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:20:13,830 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 1971 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1971 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:13,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1971 Valid, 526 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:20:13,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15663 states. [2021-11-20 07:20:14,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15663 to 7856. [2021-11-20 07:20:14,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7856 states, 7855 states have (on average 1.4630171865054105) internal successors, (11492), 7855 states have internal predecessors, (11492), 0 states have call successors, (0), 0 states 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 07:20:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7856 states to 7856 states and 11492 transitions. [2021-11-20 07:20:15,009 INFO L78 Accepts]: Start accepts. Automaton has 7856 states and 11492 transitions. Word has length 119 [2021-11-20 07:20:15,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:15,009 INFO L470 AbstractCegarLoop]: Abstraction has 7856 states and 11492 transitions. [2021-11-20 07:20:15,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 9 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 07:20:15,010 INFO L276 IsEmpty]: Start isEmpty. Operand 7856 states and 11492 transitions. [2021-11-20 07:20:15,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-20 07:20:15,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:15,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:15,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 07:20:15,012 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:15,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:15,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1786466271, now seen corresponding path program 1 times [2021-11-20 07:20:15,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:15,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140062955] [2021-11-20 07:20:15,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:15,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:15,293 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 07:20:15,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:15,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140062955] [2021-11-20 07:20:15,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140062955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:15,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:15,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-20 07:20:15,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187537644] [2021-11-20 07:20:15,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:15,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:20:15,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:15,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:20:15,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:20:15,296 INFO L87 Difference]: Start difference. First operand 7856 states and 11492 transitions. Second operand has 14 states, 14 states have (on average 8.5) internal successors, (119), 13 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 07:20:20,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:20,685 INFO L93 Difference]: Finished difference Result 39391 states and 57256 transitions. [2021-11-20 07:20:20,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:20:20,686 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.5) internal successors, (119), 13 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2021-11-20 07:20:20,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:20,736 INFO L225 Difference]: With dead ends: 39391 [2021-11-20 07:20:20,736 INFO L226 Difference]: Without dead ends: 31796 [2021-11-20 07:20:20,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2021-11-20 07:20:20,750 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 2180 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2180 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:20,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2180 Valid, 1180 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 07:20:20,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31796 states. [2021-11-20 07:20:22,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31796 to 7928. [2021-11-20 07:20:22,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7928 states, 7927 states have (on average 1.4622177368487448) internal successors, (11591), 7927 states have internal predecessors, (11591), 0 states have call successors, (0), 0 states 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 07:20:22,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7928 states to 7928 states and 11591 transitions. [2021-11-20 07:20:22,193 INFO L78 Accepts]: Start accepts. Automaton has 7928 states and 11591 transitions. Word has length 119 [2021-11-20 07:20:22,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:22,193 INFO L470 AbstractCegarLoop]: Abstraction has 7928 states and 11591 transitions. [2021-11-20 07:20:22,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.5) internal successors, (119), 13 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 07:20:22,194 INFO L276 IsEmpty]: Start isEmpty. Operand 7928 states and 11591 transitions. [2021-11-20 07:20:22,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-20 07:20:22,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:22,196 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:22,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 07:20:22,197 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:22,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:22,198 INFO L85 PathProgramCache]: Analyzing trace with hash 280122525, now seen corresponding path program 1 times [2021-11-20 07:20:22,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:22,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527937758] [2021-11-20 07:20:22,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:22,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:22,404 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 07:20:22,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:22,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527937758] [2021-11-20 07:20:22,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527937758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:22,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:22,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:20:22,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381123846] [2021-11-20 07:20:22,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:22,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:20:22,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:22,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:20:22,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:20:22,407 INFO L87 Difference]: Start difference. First operand 7928 states and 11591 transitions. Second operand has 9 states, 9 states have (on average 13.222222222222221) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 07:20:25,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:25,535 INFO L93 Difference]: Finished difference Result 21880 states and 32064 transitions. [2021-11-20 07:20:25,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:20:25,537 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.222222222222221) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2021-11-20 07:20:25,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:25,554 INFO L225 Difference]: With dead ends: 21880 [2021-11-20 07:20:25,554 INFO L226 Difference]: Without dead ends: 15467 [2021-11-20 07:20:25,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:20:25,563 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 1632 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1632 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:25,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1632 Valid, 596 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:20:25,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15467 states. [2021-11-20 07:20:26,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15467 to 7928. [2021-11-20 07:20:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7928 states, 7927 states have (on average 1.462091585719692) internal successors, (11590), 7927 states have internal predecessors, (11590), 0 states have call successors, (0), 0 states 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 07:20:26,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7928 states to 7928 states and 11590 transitions. [2021-11-20 07:20:26,882 INFO L78 Accepts]: Start accepts. Automaton has 7928 states and 11590 transitions. Word has length 119 [2021-11-20 07:20:26,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:26,883 INFO L470 AbstractCegarLoop]: Abstraction has 7928 states and 11590 transitions. [2021-11-20 07:20:26,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.222222222222221) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 07:20:26,883 INFO L276 IsEmpty]: Start isEmpty. Operand 7928 states and 11590 transitions. [2021-11-20 07:20:26,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 07:20:26,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:26,885 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:26,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-20 07:20:26,886 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:26,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:26,886 INFO L85 PathProgramCache]: Analyzing trace with hash -2000402439, now seen corresponding path program 1 times [2021-11-20 07:20:26,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:26,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658420635] [2021-11-20 07:20:26,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:26,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:26,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:27,075 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 07:20:27,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:27,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658420635] [2021-11-20 07:20:27,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658420635] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:27,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:27,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 07:20:27,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422285135] [2021-11-20 07:20:27,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:27,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:20:27,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:27,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:20:27,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:20:27,077 INFO L87 Difference]: Start difference. First operand 7928 states and 11590 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 07:20:30,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:30,508 INFO L93 Difference]: Finished difference Result 23405 states and 34178 transitions. [2021-11-20 07:20:30,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:20:30,508 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-11-20 07:20:30,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:30,525 INFO L225 Difference]: With dead ends: 23405 [2021-11-20 07:20:30,526 INFO L226 Difference]: Without dead ends: 15798 [2021-11-20 07:20:30,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:20:30,532 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 1462 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:30,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1462 Valid, 520 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:20:30,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15798 states. [2021-11-20 07:20:31,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15798 to 7856. [2021-11-20 07:20:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7856 states, 7855 states have (on average 1.4614894971355825) internal successors, (11480), 7855 states have internal predecessors, (11480), 0 states have call successors, (0), 0 states 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 07:20:31,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7856 states to 7856 states and 11480 transitions. [2021-11-20 07:20:31,911 INFO L78 Accepts]: Start accepts. Automaton has 7856 states and 11480 transitions. Word has length 120 [2021-11-20 07:20:31,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:31,912 INFO L470 AbstractCegarLoop]: Abstraction has 7856 states and 11480 transitions. [2021-11-20 07:20:31,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 07:20:31,912 INFO L276 IsEmpty]: Start isEmpty. Operand 7856 states and 11480 transitions. [2021-11-20 07:20:31,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 07:20:31,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:31,915 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:31,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-20 07:20:31,915 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:31,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:31,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1797176923, now seen corresponding path program 1 times [2021-11-20 07:20:31,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:31,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003142129] [2021-11-20 07:20:31,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:31,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:32,227 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 07:20:32,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:32,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003142129] [2021-11-20 07:20:32,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003142129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:32,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:32,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-20 07:20:32,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235545785] [2021-11-20 07:20:32,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:32,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:20:32,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:32,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:20:32,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:20:32,229 INFO L87 Difference]: Start difference. First operand 7856 states and 11480 transitions. Second operand has 14 states, 14 states have (on average 8.571428571428571) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 07:20:39,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:39,599 INFO L93 Difference]: Finished difference Result 37978 states and 54877 transitions. [2021-11-20 07:20:39,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:20:39,600 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.571428571428571) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-11-20 07:20:39,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:39,638 INFO L225 Difference]: With dead ends: 37978 [2021-11-20 07:20:39,638 INFO L226 Difference]: Without dead ends: 30439 [2021-11-20 07:20:39,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2021-11-20 07:20:39,647 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 1597 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1597 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:39,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1597 Valid, 1327 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 07:20:39,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30439 states. [2021-11-20 07:20:41,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30439 to 8053. [2021-11-20 07:20:41,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8053 states, 8052 states have (on average 1.4601341281669151) internal successors, (11757), 8052 states have internal predecessors, (11757), 0 states have call successors, (0), 0 states 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 07:20:41,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8053 states to 8053 states and 11757 transitions. [2021-11-20 07:20:41,431 INFO L78 Accepts]: Start accepts. Automaton has 8053 states and 11757 transitions. Word has length 120 [2021-11-20 07:20:41,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:41,432 INFO L470 AbstractCegarLoop]: Abstraction has 8053 states and 11757 transitions. [2021-11-20 07:20:41,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.571428571428571) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 07:20:41,432 INFO L276 IsEmpty]: Start isEmpty. Operand 8053 states and 11757 transitions. [2021-11-20 07:20:41,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-20 07:20:41,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:41,435 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:41,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 07:20:41,435 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:41,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:41,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1749409920, now seen corresponding path program 1 times [2021-11-20 07:20:41,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:41,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798974550] [2021-11-20 07:20:41,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:41,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:41,732 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 07:20:41,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:41,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798974550] [2021-11-20 07:20:41,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798974550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:41,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:41,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 07:20:41,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709590539] [2021-11-20 07:20:41,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:41,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 07:20:41,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:41,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 07:20:41,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:20:41,735 INFO L87 Difference]: Start difference. First operand 8053 states and 11757 transitions. Second operand has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 12 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 07:21:09,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:21:09,487 INFO L93 Difference]: Finished difference Result 115930 states and 169346 transitions. [2021-11-20 07:21:09,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-20 07:21:09,488 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 12 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-11-20 07:21:09,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:21:09,691 INFO L225 Difference]: With dead ends: 115930 [2021-11-20 07:21:09,691 INFO L226 Difference]: Without dead ends: 108248 [2021-11-20 07:21:09,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=627, Invalid=2025, Unknown=0, NotChecked=0, Total=2652 [2021-11-20 07:21:09,727 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 6322 mSDsluCounter, 2078 mSDsCounter, 0 mSdLazyCounter, 2168 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6322 SdHoareTripleChecker+Valid, 2451 SdHoareTripleChecker+Invalid, 2350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:21:09,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6322 Valid, 2451 Invalid, 2350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2168 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 07:21:09,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108248 states. [2021-11-20 07:21:12,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108248 to 8062. [2021-11-20 07:21:12,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8062 states, 8061 states have (on average 1.459248232229252) internal successors, (11763), 8061 states have internal predecessors, (11763), 0 states have call successors, (0), 0 states 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 07:21:12,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8062 states to 8062 states and 11763 transitions. [2021-11-20 07:21:12,503 INFO L78 Accepts]: Start accepts. Automaton has 8062 states and 11763 transitions. Word has length 121 [2021-11-20 07:21:12,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:21:12,503 INFO L470 AbstractCegarLoop]: Abstraction has 8062 states and 11763 transitions. [2021-11-20 07:21:12,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 12 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 07:21:12,504 INFO L276 IsEmpty]: Start isEmpty. Operand 8062 states and 11763 transitions. [2021-11-20 07:21:12,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-20 07:21:12,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:21:12,506 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:12,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-20 07:21:12,507 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:21:12,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:21:12,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1308016089, now seen corresponding path program 1 times [2021-11-20 07:21:12,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:21:12,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073142664] [2021-11-20 07:21:12,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:21:12,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:21:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:12,789 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 07:21:12,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:21:12,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073142664] [2021-11-20 07:21:12,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073142664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:21:12,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:21:12,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 07:21:12,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802610455] [2021-11-20 07:21:12,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:21:12,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:21:12,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:21:12,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:21:12,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:21:12,791 INFO L87 Difference]: Start difference. First operand 8062 states and 11763 transitions. Second operand has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 11 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 07:21:17,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:21:17,181 INFO L93 Difference]: Finished difference Result 18739 states and 27345 transitions. [2021-11-20 07:21:17,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:21:17,182 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 11 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-11-20 07:21:17,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:21:17,192 INFO L225 Difference]: With dead ends: 18739 [2021-11-20 07:21:17,192 INFO L226 Difference]: Without dead ends: 11003 [2021-11-20 07:21:17,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2021-11-20 07:21:17,196 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 1359 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1359 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:21:17,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1359 Valid, 1302 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 07:21:17,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11003 states. [2021-11-20 07:21:19,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11003 to 7865. [2021-11-20 07:21:19,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7865 states, 7864 states have (on average 1.4601983723296033) internal successors, (11483), 7864 states have internal predecessors, (11483), 0 states have call successors, (0), 0 states 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 07:21:19,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7865 states to 7865 states and 11483 transitions. [2021-11-20 07:21:19,237 INFO L78 Accepts]: Start accepts. Automaton has 7865 states and 11483 transitions. Word has length 121 [2021-11-20 07:21:19,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:21:19,237 INFO L470 AbstractCegarLoop]: Abstraction has 7865 states and 11483 transitions. [2021-11-20 07:21:19,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 11 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 07:21:19,238 INFO L276 IsEmpty]: Start isEmpty. Operand 7865 states and 11483 transitions. [2021-11-20 07:21:19,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-20 07:21:19,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:21:19,240 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:19,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-20 07:21:19,240 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:21:19,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:21:19,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1795722265, now seen corresponding path program 1 times [2021-11-20 07:21:19,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:21:19,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677909354] [2021-11-20 07:21:19,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:21:19,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:21:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:19,435 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 07:21:19,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:21:19,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677909354] [2021-11-20 07:21:19,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677909354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:21:19,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:21:19,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 07:21:19,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255761708] [2021-11-20 07:21:19,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:21:19,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:21:19,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:21:19,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:21:19,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:21:19,437 INFO L87 Difference]: Start difference. First operand 7865 states and 11483 transitions. Second operand has 10 states, 10 states have (on average 12.2) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 07:21:24,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:21:24,603 INFO L93 Difference]: Finished difference Result 23399 states and 34155 transitions. [2021-11-20 07:21:24,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:21:24,604 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-11-20 07:21:24,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:21:24,620 INFO L225 Difference]: With dead ends: 23399 [2021-11-20 07:21:24,620 INFO L226 Difference]: Without dead ends: 15747 [2021-11-20 07:21:24,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:21:24,627 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 1851 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1851 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:21:24,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1851 Valid, 577 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:21:24,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15747 states. [2021-11-20 07:21:26,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15747 to 7865. [2021-11-20 07:21:26,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7865 states, 7864 states have (on average 1.459053916581892) internal successors, (11474), 7864 states have internal predecessors, (11474), 0 states have call successors, (0), 0 states 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 07:21:26,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7865 states to 7865 states and 11474 transitions. [2021-11-20 07:21:26,990 INFO L78 Accepts]: Start accepts. Automaton has 7865 states and 11474 transitions. Word has length 122 [2021-11-20 07:21:26,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:21:26,991 INFO L470 AbstractCegarLoop]: Abstraction has 7865 states and 11474 transitions. [2021-11-20 07:21:26,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 07:21:26,991 INFO L276 IsEmpty]: Start isEmpty. Operand 7865 states and 11474 transitions. [2021-11-20 07:21:26,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-20 07:21:26,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:21:26,992 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:26,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-20 07:21:26,992 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:21:26,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:21:26,993 INFO L85 PathProgramCache]: Analyzing trace with hash -141489226, now seen corresponding path program 1 times [2021-11-20 07:21:26,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:21:26,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492800945] [2021-11-20 07:21:26,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:21:26,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:21:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:27,292 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 07:21:27,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:21:27,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492800945] [2021-11-20 07:21:27,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492800945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:21:27,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:21:27,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 07:21:27,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590143309] [2021-11-20 07:21:27,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:21:27,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 07:21:27,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:21:27,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 07:21:27,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:21:27,294 INFO L87 Difference]: Start difference. First operand 7865 states and 11474 transitions. Second operand has 13 states, 13 states have (on average 9.461538461538462) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)