./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.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_731e91dc-e244-4add-bbe0-55af4117b5a0/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e91dc-e244-4add-bbe0-55af4117b5a0/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_731e91dc-e244-4add-bbe0-55af4117b5a0/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e91dc-e244-4add-bbe0-55af4117b5a0/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e91dc-e244-4add-bbe0-55af4117b5a0/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_731e91dc-e244-4add-bbe0-55af4117b5a0/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 9260884558ccc913fea23720ea19c1107cd16edf25af23049028c38b098feff1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:54:46,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:54:46,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:54:46,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:54:46,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:54:46,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:54:46,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:54:46,584 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:54:46,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:54:46,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:54:46,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:54:46,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:54:46,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:54:46,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:54:46,603 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:54:46,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:54:46,610 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:54:46,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:54:46,614 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:54:46,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:54:46,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:54:46,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:54:46,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:54:46,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:54:46,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:54:46,643 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:54:46,644 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:54:46,646 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:54:46,647 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:54:46,648 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:54:46,649 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:54:46,650 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:54:46,653 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:54:46,654 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:54:46,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:54:46,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:54:46,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:54:46,658 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:54:46,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:54:46,659 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:54:46,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:54:46,661 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e91dc-e244-4add-bbe0-55af4117b5a0/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:54:46,687 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:54:46,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:54:46,688 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:54:46,688 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:54:46,689 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:54:46,689 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:54:46,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:54:46,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:54:46,691 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:54:46,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:54:46,691 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:54:46,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:54:46,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:54:46,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:54:46,692 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:54:46,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:54:46,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:54:46,693 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:54:46,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:54:46,693 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:54:46,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:54:46,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:54:46,694 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:54:46,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:54:46,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:54:46,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:54:46,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:54:46,695 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:54:46,695 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:54:46,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:54:46,696 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:54:46,696 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:54:46,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:54:46,696 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:54:46,697 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_731e91dc-e244-4add-bbe0-55af4117b5a0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e91dc-e244-4add-bbe0-55af4117b5a0/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9260884558ccc913fea23720ea19c1107cd16edf25af23049028c38b098feff1 [2021-11-20 06:54:47,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:54:47,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:54:47,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:54:47,065 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:54:47,066 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:54:47,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e91dc-e244-4add-bbe0-55af4117b5a0/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-20 06:54:47,149 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e91dc-e244-4add-bbe0-55af4117b5a0/bin/uautomizer-DQz5hQGWxF/data/96684a403/5b4ffbfcc3524d39a2d648701c159f6e/FLAG86baab1ea [2021-11-20 06:54:47,788 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:54:47,794 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e91dc-e244-4add-bbe0-55af4117b5a0/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-20 06:54:47,822 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e91dc-e244-4add-bbe0-55af4117b5a0/bin/uautomizer-DQz5hQGWxF/data/96684a403/5b4ffbfcc3524d39a2d648701c159f6e/FLAG86baab1ea [2021-11-20 06:54:47,999 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e91dc-e244-4add-bbe0-55af4117b5a0/bin/uautomizer-DQz5hQGWxF/data/96684a403/5b4ffbfcc3524d39a2d648701c159f6e [2021-11-20 06:54:48,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:54:48,004 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:54:48,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:54:48,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:54:48,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:54:48,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:54:48" (1/1) ... [2021-11-20 06:54:48,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ff5fcd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:48, skipping insertion in model container [2021-11-20 06:54:48,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:54:48" (1/1) ... [2021-11-20 06:54:48,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:54:48,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:54:48,528 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_731e91dc-e244-4add-bbe0-55af4117b5a0/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[15864,15877] [2021-11-20 06:54:48,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:54:48,686 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:54:48,869 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_731e91dc-e244-4add-bbe0-55af4117b5a0/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[15864,15877] [2021-11-20 06:54:48,932 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:54:48,949 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:54:48,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:48 WrapperNode [2021-11-20 06:54:48,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:54:48,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:54:48,951 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:54:48,951 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:54:48,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:48" (1/1) ... [2021-11-20 06:54:48,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:48" (1/1) ... [2021-11-20 06:54:49,070 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1292 [2021-11-20 06:54:49,070 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:54:49,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:54:49,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:54:49,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:54:49,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:48" (1/1) ... [2021-11-20 06:54:49,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:48" (1/1) ... [2021-11-20 06:54:49,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:48" (1/1) ... [2021-11-20 06:54:49,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:48" (1/1) ... [2021-11-20 06:54:49,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:48" (1/1) ... [2021-11-20 06:54:49,148 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:48" (1/1) ... [2021-11-20 06:54:49,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:48" (1/1) ... [2021-11-20 06:54:49,165 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:54:49,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:54:49,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:54:49,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:54:49,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:48" (1/1) ... [2021-11-20 06:54:49,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:54:49,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e91dc-e244-4add-bbe0-55af4117b5a0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:49,220 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e91dc-e244-4add-bbe0-55af4117b5a0/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:54:49,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_731e91dc-e244-4add-bbe0-55af4117b5a0/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:54:49,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:54:49,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:54:49,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:54:49,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:54:49,521 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:54:49,523 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:54:50,757 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:54:50,774 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:54:50,776 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 06:54:50,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:54:50 BoogieIcfgContainer [2021-11-20 06:54:50,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:54:50,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:54:50,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:54:50,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:54:50,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:54:48" (1/3) ... [2021-11-20 06:54:50,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@568dba93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:54:50, skipping insertion in model container [2021-11-20 06:54:50,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:48" (2/3) ... [2021-11-20 06:54:50,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@568dba93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:54:50, skipping insertion in model container [2021-11-20 06:54:50,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:54:50" (3/3) ... [2021-11-20 06:54:50,794 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-20 06:54:50,808 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:54:50,809 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:54:50,865 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:54:50,874 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 06:54:50,874 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:54:50,904 INFO L276 IsEmpty]: Start isEmpty. Operand has 344 states, 342 states have (on average 1.7690058479532165) internal successors, (605), 343 states have internal predecessors, (605), 0 states have call successors, (0), 0 states 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 06:54:50,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-20 06:54:50,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:50,926 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:54:50,927 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:50,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:50,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1491324598, now seen corresponding path program 1 times [2021-11-20 06:54:50,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:50,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860905969] [2021-11-20 06:54:50,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:50,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:51,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:51,573 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 06:54:51,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:51,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860905969] [2021-11-20 06:54:51,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860905969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:51,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:51,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:54:51,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595484357] [2021-11-20 06:54:51,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:51,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:51,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:51,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:51,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:51,622 INFO L87 Difference]: Start difference. First operand has 344 states, 342 states have (on average 1.7690058479532165) internal successors, (605), 343 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states 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 06:54:51,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:51,868 INFO L93 Difference]: Finished difference Result 702 states and 1220 transitions. [2021-11-20 06:54:51,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:51,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 155 [2021-11-20 06:54:51,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:51,893 INFO L225 Difference]: With dead ends: 702 [2021-11-20 06:54:51,894 INFO L226 Difference]: Without dead ends: 565 [2021-11-20 06:54:51,898 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 06:54:51,902 INFO L933 BasicCegarLoop]: 574 mSDtfsCounter, 418 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:51,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 1007 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:54:51,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-11-20 06:54:52,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 563. [2021-11-20 06:54:52,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 1.498220640569395) internal successors, (842), 562 states have internal predecessors, (842), 0 states have call successors, (0), 0 states 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 06:54:52,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 842 transitions. [2021-11-20 06:54:52,019 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 842 transitions. Word has length 155 [2021-11-20 06:54:52,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:52,020 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 842 transitions. [2021-11-20 06:54:52,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states 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 06:54:52,021 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 842 transitions. [2021-11-20 06:54:52,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-20 06:54:52,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:52,026 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:54:52,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:54:52,026 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:52,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:52,027 INFO L85 PathProgramCache]: Analyzing trace with hash -599043347, now seen corresponding path program 1 times [2021-11-20 06:54:52,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:52,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765926695] [2021-11-20 06:54:52,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:52,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:52,426 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 06:54:52,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:52,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765926695] [2021-11-20 06:54:52,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765926695] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:52,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:52,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:54:52,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549336292] [2021-11-20 06:54:52,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:52,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:54:52,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:52,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:54:52,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:54:52,431 INFO L87 Difference]: Start difference. First operand 563 states and 842 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states 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 06:54:52,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:52,640 INFO L93 Difference]: Finished difference Result 1643 states and 2449 transitions. [2021-11-20 06:54:52,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:54:52,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 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 155 [2021-11-20 06:54:52,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:52,649 INFO L225 Difference]: With dead ends: 1643 [2021-11-20 06:54:52,649 INFO L226 Difference]: Without dead ends: 1089 [2021-11-20 06:54:52,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:54:52,654 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 1089 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1089 SdHoareTripleChecker+Valid, 1238 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:52,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1089 Valid, 1238 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:54:52,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-11-20 06:54:52,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 1087. [2021-11-20 06:54:52,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 1.4806629834254144) internal successors, (1608), 1086 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states 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 06:54:52,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1608 transitions. [2021-11-20 06:54:52,749 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1608 transitions. Word has length 155 [2021-11-20 06:54:52,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:52,750 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 1608 transitions. [2021-11-20 06:54:52,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states 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 06:54:52,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1608 transitions. [2021-11-20 06:54:52,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 06:54:52,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:52,755 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:54:52,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:54:52,756 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:52,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:52,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1611010681, now seen corresponding path program 1 times [2021-11-20 06:54:52,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:52,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133688291] [2021-11-20 06:54:52,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:52,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:52,818 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 06:54:52,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:52,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133688291] [2021-11-20 06:54:52,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133688291] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:52,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:52,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:54:52,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863462063] [2021-11-20 06:54:52,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:52,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:52,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:52,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:52,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:52,827 INFO L87 Difference]: Start difference. First operand 1087 states and 1608 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 06:54:52,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:52,943 INFO L93 Difference]: Finished difference Result 3223 states and 4762 transitions. [2021-11-20 06:54:52,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:52,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 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 156 [2021-11-20 06:54:52,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:52,959 INFO L225 Difference]: With dead ends: 3223 [2021-11-20 06:54:52,959 INFO L226 Difference]: Without dead ends: 2164 [2021-11-20 06:54:52,961 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 06:54:52,968 INFO L933 BasicCegarLoop]: 699 mSDtfsCounter, 492 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:52,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 1193 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:54:52,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2021-11-20 06:54:53,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 1089. [2021-11-20 06:54:53,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1088 states have (on average 1.4797794117647058) internal successors, (1610), 1088 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states 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 06:54:53,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1610 transitions. [2021-11-20 06:54:53,060 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1610 transitions. Word has length 156 [2021-11-20 06:54:53,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:53,060 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1610 transitions. [2021-11-20 06:54:53,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 06:54:53,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1610 transitions. [2021-11-20 06:54:53,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-20 06:54:53,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:53,064 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:54:53,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:54:53,064 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:53,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:53,065 INFO L85 PathProgramCache]: Analyzing trace with hash -580833396, now seen corresponding path program 1 times [2021-11-20 06:54:53,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:53,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462778266] [2021-11-20 06:54:53,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:53,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:53,212 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 06:54:53,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:53,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462778266] [2021-11-20 06:54:53,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462778266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:53,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:53,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:54:53,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125155811] [2021-11-20 06:54:53,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:53,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:54:53,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:53,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:54:53,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:54:53,216 INFO L87 Difference]: Start difference. First operand 1089 states and 1610 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 06:54:53,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:53,434 INFO L93 Difference]: Finished difference Result 3149 states and 4634 transitions. [2021-11-20 06:54:53,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:54:53,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 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 157 [2021-11-20 06:54:53,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:53,449 INFO L225 Difference]: With dead ends: 3149 [2021-11-20 06:54:53,450 INFO L226 Difference]: Without dead ends: 2090 [2021-11-20 06:54:53,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:54:53,462 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 1043 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 1249 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:53,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1043 Valid, 1249 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:54:53,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-11-20 06:54:53,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2021-11-20 06:54:53,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 2087 states have (on average 1.460469573550551) internal successors, (3048), 2087 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states 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 06:54:53,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3048 transitions. [2021-11-20 06:54:53,606 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3048 transitions. Word has length 157 [2021-11-20 06:54:53,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:53,607 INFO L470 AbstractCegarLoop]: Abstraction has 2088 states and 3048 transitions. [2021-11-20 06:54:53,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 06:54:53,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3048 transitions. [2021-11-20 06:54:53,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-20 06:54:53,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:53,611 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:54:53,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:54:53,612 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:53,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:53,615 INFO L85 PathProgramCache]: Analyzing trace with hash 268848056, now seen corresponding path program 1 times [2021-11-20 06:54:53,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:53,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285767744] [2021-11-20 06:54:53,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:53,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:53,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:53,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285767744] [2021-11-20 06:54:53,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285767744] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:53,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:53,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:54:53,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766023800] [2021-11-20 06:54:53,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:53,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:53,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:53,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:53,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:53,694 INFO L87 Difference]: Start difference. First operand 2088 states and 3048 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 06:54:53,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:53,957 INFO L93 Difference]: Finished difference Result 6188 states and 9024 transitions. [2021-11-20 06:54:53,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:53,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 158 [2021-11-20 06:54:53,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:53,983 INFO L225 Difference]: With dead ends: 6188 [2021-11-20 06:54:53,983 INFO L226 Difference]: Without dead ends: 4144 [2021-11-20 06:54:53,989 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 06:54:53,990 INFO L933 BasicCegarLoop]: 978 mSDtfsCounter, 478 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:53,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 1472 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:54:53,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-11-20 06:54:54,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 2092. [2021-11-20 06:54:54,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 1.459588713534194) internal successors, (3052), 2091 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states 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 06:54:54,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 3052 transitions. [2021-11-20 06:54:54,237 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 3052 transitions. Word has length 158 [2021-11-20 06:54:54,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:54,238 INFO L470 AbstractCegarLoop]: Abstraction has 2092 states and 3052 transitions. [2021-11-20 06:54:54,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 06:54:54,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 3052 transitions. [2021-11-20 06:54:54,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-20 06:54:54,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:54,246 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:54:54,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:54:54,247 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:54,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:54,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1767168465, now seen corresponding path program 1 times [2021-11-20 06:54:54,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:54,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566675817] [2021-11-20 06:54:54,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:54,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:54,318 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 06:54:54,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:54,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566675817] [2021-11-20 06:54:54,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566675817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:54,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:54,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:54:54,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875817781] [2021-11-20 06:54:54,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:54,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:54,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:54,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:54,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:54,321 INFO L87 Difference]: Start difference. First operand 2092 states and 3052 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 06:54:54,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:54,711 INFO L93 Difference]: Finished difference Result 5411 states and 7901 transitions. [2021-11-20 06:54:54,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:54,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 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 159 [2021-11-20 06:54:54,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:54,737 INFO L225 Difference]: With dead ends: 5411 [2021-11-20 06:54:54,737 INFO L226 Difference]: Without dead ends: 3651 [2021-11-20 06:54:54,740 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 06:54:54,742 INFO L933 BasicCegarLoop]: 939 mSDtfsCounter, 419 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:54,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 1396 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:54:54,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3651 states. [2021-11-20 06:54:55,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3651 to 3649. [2021-11-20 06:54:55,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3648 states have (on average 1.4372258771929824) internal successors, (5243), 3648 states have internal predecessors, (5243), 0 states have call successors, (0), 0 states 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 06:54:55,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 5243 transitions. [2021-11-20 06:54:55,116 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 5243 transitions. Word has length 159 [2021-11-20 06:54:55,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:55,117 INFO L470 AbstractCegarLoop]: Abstraction has 3649 states and 5243 transitions. [2021-11-20 06:54:55,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 06:54:55,118 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 5243 transitions. [2021-11-20 06:54:55,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-20 06:54:55,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:55,125 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:54:55,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:54:55,126 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:55,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:55,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1188374862, now seen corresponding path program 1 times [2021-11-20 06:54:55,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:55,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679417525] [2021-11-20 06:54:55,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:55,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:55,315 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 06:54:55,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:55,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679417525] [2021-11-20 06:54:55,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679417525] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:55,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:55,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:54:55,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234662164] [2021-11-20 06:54:55,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:55,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:54:55,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:55,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:54:55,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:54:55,319 INFO L87 Difference]: Start difference. First operand 3649 states and 5243 transitions. Second operand has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 06:54:55,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:55,955 INFO L93 Difference]: Finished difference Result 10381 states and 14906 transitions. [2021-11-20 06:54:55,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:54:55,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 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 159 [2021-11-20 06:54:55,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:56,000 INFO L225 Difference]: With dead ends: 10381 [2021-11-20 06:54:56,000 INFO L226 Difference]: Without dead ends: 6769 [2021-11-20 06:54:56,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:54:56,008 INFO L933 BasicCegarLoop]: 800 mSDtfsCounter, 924 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:56,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 1702 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:54:56,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6769 states. [2021-11-20 06:54:56,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6769 to 6767. [2021-11-20 06:54:56,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6767 states, 6766 states have (on average 1.4238841265149276) internal successors, (9634), 6766 states have internal predecessors, (9634), 0 states have call successors, (0), 0 states 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 06:54:56,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6767 states to 6767 states and 9634 transitions. [2021-11-20 06:54:56,601 INFO L78 Accepts]: Start accepts. Automaton has 6767 states and 9634 transitions. Word has length 159 [2021-11-20 06:54:56,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:56,602 INFO L470 AbstractCegarLoop]: Abstraction has 6767 states and 9634 transitions. [2021-11-20 06:54:56,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 06:54:56,602 INFO L276 IsEmpty]: Start isEmpty. Operand 6767 states and 9634 transitions. [2021-11-20 06:54:56,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-20 06:54:56,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:56,614 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:54:56,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:54:56,614 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:56,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:56,616 INFO L85 PathProgramCache]: Analyzing trace with hash 504620971, now seen corresponding path program 1 times [2021-11-20 06:54:56,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:56,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477445169] [2021-11-20 06:54:56,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:56,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:56,761 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 06:54:56,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:56,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477445169] [2021-11-20 06:54:56,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477445169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:56,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:56,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:54:56,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755898035] [2021-11-20 06:54:56,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:56,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:54:56,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:56,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:54:56,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:54:56,764 INFO L87 Difference]: Start difference. First operand 6767 states and 9634 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 06:54:57,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:57,434 INFO L93 Difference]: Finished difference Result 13796 states and 19550 transitions. [2021-11-20 06:54:57,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:54:57,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 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 159 [2021-11-20 06:54:57,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:57,496 INFO L225 Difference]: With dead ends: 13796 [2021-11-20 06:54:57,496 INFO L226 Difference]: Without dead ends: 7146 [2021-11-20 06:54:57,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:54:57,507 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 987 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:57,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [987 Valid, 1276 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:54:57,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7146 states. [2021-11-20 06:54:58,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7146 to 6991. [2021-11-20 06:54:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6991 states, 6990 states have (on average 1.4143061516452073) internal successors, (9886), 6990 states have internal predecessors, (9886), 0 states have call successors, (0), 0 states 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 06:54:58,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6991 states to 6991 states and 9886 transitions. [2021-11-20 06:54:58,114 INFO L78 Accepts]: Start accepts. Automaton has 6991 states and 9886 transitions. Word has length 159 [2021-11-20 06:54:58,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:58,115 INFO L470 AbstractCegarLoop]: Abstraction has 6991 states and 9886 transitions. [2021-11-20 06:54:58,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 06:54:58,116 INFO L276 IsEmpty]: Start isEmpty. Operand 6991 states and 9886 transitions. [2021-11-20 06:54:58,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-20 06:54:58,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:58,131 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:54:58,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:54:58,133 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:58,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:58,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1391753097, now seen corresponding path program 1 times [2021-11-20 06:54:58,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:58,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580370869] [2021-11-20 06:54:58,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:58,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:58,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:58,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580370869] [2021-11-20 06:54:58,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580370869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:58,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:58,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:54:58,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017673345] [2021-11-20 06:54:58,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:58,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:58,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:58,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:58,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:58,190 INFO L87 Difference]: Start difference. First operand 6991 states and 9886 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 06:54:59,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:59,136 INFO L93 Difference]: Finished difference Result 20247 states and 28724 transitions. [2021-11-20 06:54:59,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:59,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 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 160 [2021-11-20 06:54:59,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:59,174 INFO L225 Difference]: With dead ends: 20247 [2021-11-20 06:54:59,174 INFO L226 Difference]: Without dead ends: 13857 [2021-11-20 06:54:59,188 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 06:54:59,191 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 464 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:59,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 1118 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:54:59,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13857 states. [2021-11-20 06:54:59,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13857 to 7007. [2021-11-20 06:54:59,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7007 states, 7006 states have (on average 1.4133599771624321) internal successors, (9902), 7006 states have internal predecessors, (9902), 0 states have call successors, (0), 0 states 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 06:54:59,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7007 states to 7007 states and 9902 transitions. [2021-11-20 06:54:59,816 INFO L78 Accepts]: Start accepts. Automaton has 7007 states and 9902 transitions. Word has length 160 [2021-11-20 06:54:59,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:59,816 INFO L470 AbstractCegarLoop]: Abstraction has 7007 states and 9902 transitions. [2021-11-20 06:54:59,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 06:54:59,817 INFO L276 IsEmpty]: Start isEmpty. Operand 7007 states and 9902 transitions. [2021-11-20 06:54:59,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-20 06:54:59,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:59,830 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:54:59,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:54:59,830 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:59,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:59,835 INFO L85 PathProgramCache]: Analyzing trace with hash -911721654, now seen corresponding path program 1 times [2021-11-20 06:54:59,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:59,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679306131] [2021-11-20 06:54:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:59,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:59,951 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 06:54:59,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:59,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679306131] [2021-11-20 06:54:59,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679306131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:59,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:59,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:54:59,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580644910] [2021-11-20 06:54:59,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:59,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:54:59,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:59,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:54:59,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:54:59,954 INFO L87 Difference]: Start difference. First operand 7007 states and 9902 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 06:55:00,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:00,471 INFO L93 Difference]: Finished difference Result 14004 states and 19790 transitions. [2021-11-20 06:55:00,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:55:00,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 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 161 [2021-11-20 06:55:00,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:00,488 INFO L225 Difference]: With dead ends: 14004 [2021-11-20 06:55:00,488 INFO L226 Difference]: Without dead ends: 7005 [2021-11-20 06:55:00,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:55:00,498 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 65 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:00,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 1542 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:55:00,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7005 states. [2021-11-20 06:55:00,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7005 to 7005. [2021-11-20 06:55:01,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7005 states, 7004 states have (on average 1.4131924614505997) internal successors, (9898), 7004 states have internal predecessors, (9898), 0 states have call successors, (0), 0 states 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 06:55:01,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7005 states to 7005 states and 9898 transitions. [2021-11-20 06:55:01,046 INFO L78 Accepts]: Start accepts. Automaton has 7005 states and 9898 transitions. Word has length 161 [2021-11-20 06:55:01,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:01,046 INFO L470 AbstractCegarLoop]: Abstraction has 7005 states and 9898 transitions. [2021-11-20 06:55:01,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 06:55:01,047 INFO L276 IsEmpty]: Start isEmpty. Operand 7005 states and 9898 transitions. [2021-11-20 06:55:01,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-20 06:55:01,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:01,062 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:55:01,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:55:01,063 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:01,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:01,064 INFO L85 PathProgramCache]: Analyzing trace with hash -2124598414, now seen corresponding path program 1 times [2021-11-20 06:55:01,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:01,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016331836] [2021-11-20 06:55:01,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:01,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:01,176 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 06:55:01,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:01,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016331836] [2021-11-20 06:55:01,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016331836] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:01,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:01,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:55:01,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677406552] [2021-11-20 06:55:01,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:01,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:55:01,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:01,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:55:01,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:55:01,180 INFO L87 Difference]: Start difference. First operand 7005 states and 9898 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 06:55:02,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:02,080 INFO L93 Difference]: Finished difference Result 16189 states and 22982 transitions. [2021-11-20 06:55:02,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:55:02,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 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 161 [2021-11-20 06:55:02,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:02,110 INFO L225 Difference]: With dead ends: 16189 [2021-11-20 06:55:02,110 INFO L226 Difference]: Without dead ends: 10395 [2021-11-20 06:55:02,124 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 06:55:02,125 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 424 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:02,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 1394 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:55:02,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10395 states. [2021-11-20 06:55:02,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10395 to 10393. [2021-11-20 06:55:02,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10393 states, 10392 states have (on average 1.3914549653579678) internal successors, (14460), 10392 states have internal predecessors, (14460), 0 states have call successors, (0), 0 states 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 06:55:02,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10393 states to 10393 states and 14460 transitions. [2021-11-20 06:55:02,857 INFO L78 Accepts]: Start accepts. Automaton has 10393 states and 14460 transitions. Word has length 161 [2021-11-20 06:55:02,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:02,858 INFO L470 AbstractCegarLoop]: Abstraction has 10393 states and 14460 transitions. [2021-11-20 06:55:02,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 06:55:02,859 INFO L276 IsEmpty]: Start isEmpty. Operand 10393 states and 14460 transitions. [2021-11-20 06:55:02,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-20 06:55:02,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:02,878 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:55:02,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:55:02,879 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:02,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:02,879 INFO L85 PathProgramCache]: Analyzing trace with hash -727385235, now seen corresponding path program 1 times [2021-11-20 06:55:02,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:02,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114626840] [2021-11-20 06:55:02,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:02,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:02,932 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 06:55:02,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:02,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114626840] [2021-11-20 06:55:02,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114626840] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:02,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:02,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:55:02,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230344684] [2021-11-20 06:55:02,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:02,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:55:02,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:02,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:55:02,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:55:02,936 INFO L87 Difference]: Start difference. First operand 10393 states and 14460 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states 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 06:55:03,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:03,809 INFO L93 Difference]: Finished difference Result 24303 states and 34628 transitions. [2021-11-20 06:55:03,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:55:03,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 163 [2021-11-20 06:55:03,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:03,843 INFO L225 Difference]: With dead ends: 24303 [2021-11-20 06:55:03,843 INFO L226 Difference]: Without dead ends: 15108 [2021-11-20 06:55:03,860 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 06:55:03,861 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 315 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:03,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1075 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:55:03,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15108 states. [2021-11-20 06:55:04,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15108 to 13181. [2021-11-20 06:55:04,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13181 states, 13180 states have (on average 1.4350531107738997) internal successors, (18914), 13180 states have internal predecessors, (18914), 0 states have call successors, (0), 0 states 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 06:55:04,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13181 states to 13181 states and 18914 transitions. [2021-11-20 06:55:04,790 INFO L78 Accepts]: Start accepts. Automaton has 13181 states and 18914 transitions. Word has length 163 [2021-11-20 06:55:04,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:04,790 INFO L470 AbstractCegarLoop]: Abstraction has 13181 states and 18914 transitions. [2021-11-20 06:55:04,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states 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 06:55:04,791 INFO L276 IsEmpty]: Start isEmpty. Operand 13181 states and 18914 transitions. [2021-11-20 06:55:04,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-20 06:55:04,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:04,807 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:55:04,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:55:04,808 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:04,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:04,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1248523357, now seen corresponding path program 1 times [2021-11-20 06:55:04,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:04,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451604976] [2021-11-20 06:55:04,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:04,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:04,858 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 06:55:04,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:04,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451604976] [2021-11-20 06:55:04,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451604976] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:04,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:04,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:55:04,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295007826] [2021-11-20 06:55:04,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:04,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:55:04,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:04,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:55:04,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:55:04,861 INFO L87 Difference]: Start difference. First operand 13181 states and 18914 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states 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 06:55:06,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:06,069 INFO L93 Difference]: Finished difference Result 29139 states and 42714 transitions. [2021-11-20 06:55:06,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:55:06,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 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 165 [2021-11-20 06:55:06,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:06,114 INFO L225 Difference]: With dead ends: 29139 [2021-11-20 06:55:06,115 INFO L226 Difference]: Without dead ends: 19243 [2021-11-20 06:55:06,133 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 06:55:06,134 INFO L933 BasicCegarLoop]: 687 mSDtfsCounter, 310 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:06,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 1035 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:55:06,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19243 states. [2021-11-20 06:55:07,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19243 to 17437. [2021-11-20 06:55:07,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17437 states, 17436 states have (on average 1.4709795824730443) internal successors, (25648), 17436 states have internal predecessors, (25648), 0 states have call successors, (0), 0 states 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 06:55:07,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17437 states to 17437 states and 25648 transitions. [2021-11-20 06:55:07,424 INFO L78 Accepts]: Start accepts. Automaton has 17437 states and 25648 transitions. Word has length 165 [2021-11-20 06:55:07,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:07,425 INFO L470 AbstractCegarLoop]: Abstraction has 17437 states and 25648 transitions. [2021-11-20 06:55:07,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states 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 06:55:07,426 INFO L276 IsEmpty]: Start isEmpty. Operand 17437 states and 25648 transitions. [2021-11-20 06:55:07,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-20 06:55:07,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:07,447 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:55:07,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:55:07,447 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:07,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:07,448 INFO L85 PathProgramCache]: Analyzing trace with hash -846552929, now seen corresponding path program 1 times [2021-11-20 06:55:07,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:07,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920163527] [2021-11-20 06:55:07,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:07,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:07,547 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 06:55:07,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:07,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920163527] [2021-11-20 06:55:07,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920163527] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:07,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:07,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:55:07,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880615849] [2021-11-20 06:55:07,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:07,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:55:07,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:07,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:55:07,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:55:07,550 INFO L87 Difference]: Start difference. First operand 17437 states and 25648 transitions. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 06:55:09,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:09,274 INFO L93 Difference]: Finished difference Result 33724 states and 49986 transitions. [2021-11-20 06:55:09,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:55:09,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 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 166 [2021-11-20 06:55:09,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:09,308 INFO L225 Difference]: With dead ends: 33724 [2021-11-20 06:55:09,308 INFO L226 Difference]: Without dead ends: 17437 [2021-11-20 06:55:09,323 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 06:55:09,324 INFO L933 BasicCegarLoop]: 384 mSDtfsCounter, 1300 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1300 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:09,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1300 Valid, 480 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:55:09,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17437 states. [2021-11-20 06:55:10,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17437 to 17437. [2021-11-20 06:55:10,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17437 states, 17436 states have (on average 1.4573296627666896) internal successors, (25410), 17436 states have internal predecessors, (25410), 0 states have call successors, (0), 0 states 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 06:55:10,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17437 states to 17437 states and 25410 transitions. [2021-11-20 06:55:10,608 INFO L78 Accepts]: Start accepts. Automaton has 17437 states and 25410 transitions. Word has length 166 [2021-11-20 06:55:10,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:10,608 INFO L470 AbstractCegarLoop]: Abstraction has 17437 states and 25410 transitions. [2021-11-20 06:55:10,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 06:55:10,609 INFO L276 IsEmpty]: Start isEmpty. Operand 17437 states and 25410 transitions. [2021-11-20 06:55:10,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-20 06:55:10,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:10,626 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:55:10,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:55:10,626 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:10,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:10,627 INFO L85 PathProgramCache]: Analyzing trace with hash -316024710, now seen corresponding path program 1 times [2021-11-20 06:55:10,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:10,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770897966] [2021-11-20 06:55:10,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:10,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:10,765 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 06:55:10,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:10,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770897966] [2021-11-20 06:55:10,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770897966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:10,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:10,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:55:10,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854491822] [2021-11-20 06:55:10,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:10,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:55:10,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:10,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:55:10,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:55:10,768 INFO L87 Difference]: Start difference. First operand 17437 states and 25410 transitions. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 06:55:12,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:12,916 INFO L93 Difference]: Finished difference Result 43679 states and 65710 transitions. [2021-11-20 06:55:12,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:55:12,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 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 166 [2021-11-20 06:55:12,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:12,974 INFO L225 Difference]: With dead ends: 43679 [2021-11-20 06:55:12,974 INFO L226 Difference]: Without dead ends: 32388 [2021-11-20 06:55:12,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 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 06:55:12,996 INFO L933 BasicCegarLoop]: 461 mSDtfsCounter, 690 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:12,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 965 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:55:13,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32388 states. [2021-11-20 06:55:15,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32388 to 32386. [2021-11-20 06:55:15,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32386 states, 32385 states have (on average 1.4722556739231125) internal successors, (47679), 32385 states have internal predecessors, (47679), 0 states have call successors, (0), 0 states 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 06:55:15,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32386 states to 32386 states and 47679 transitions. [2021-11-20 06:55:15,566 INFO L78 Accepts]: Start accepts. Automaton has 32386 states and 47679 transitions. Word has length 166 [2021-11-20 06:55:15,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:15,566 INFO L470 AbstractCegarLoop]: Abstraction has 32386 states and 47679 transitions. [2021-11-20 06:55:15,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 06:55:15,567 INFO L276 IsEmpty]: Start isEmpty. Operand 32386 states and 47679 transitions. [2021-11-20 06:55:15,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-20 06:55:15,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:15,585 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:55:15,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:55:15,586 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:15,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:15,586 INFO L85 PathProgramCache]: Analyzing trace with hash 105363050, now seen corresponding path program 1 times [2021-11-20 06:55:15,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:15,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379465566] [2021-11-20 06:55:15,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:15,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:15,704 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 06:55:15,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:15,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379465566] [2021-11-20 06:55:15,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379465566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:15,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:15,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:55:15,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447313355] [2021-11-20 06:55:15,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:15,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:55:15,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:15,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:55:15,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:55:15,707 INFO L87 Difference]: Start difference. First operand 32386 states and 47679 transitions. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 06:55:19,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:19,462 INFO L93 Difference]: Finished difference Result 83811 states and 123599 transitions. [2021-11-20 06:55:19,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:55:19,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 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 166 [2021-11-20 06:55:19,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:19,554 INFO L225 Difference]: With dead ends: 83811 [2021-11-20 06:55:19,554 INFO L226 Difference]: Without dead ends: 51773 [2021-11-20 06:55:19,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:55:19,583 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 971 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:19,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [971 Valid, 1276 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:55:19,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51773 states. [2021-11-20 06:55:23,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51773 to 51771. [2021-11-20 06:55:23,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51771 states, 51770 states have (on average 1.4583349430171915) internal successors, (75498), 51770 states have internal predecessors, (75498), 0 states have call successors, (0), 0 states 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 06:55:24,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51771 states to 51771 states and 75498 transitions. [2021-11-20 06:55:24,110 INFO L78 Accepts]: Start accepts. Automaton has 51771 states and 75498 transitions. Word has length 166 [2021-11-20 06:55:24,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:24,111 INFO L470 AbstractCegarLoop]: Abstraction has 51771 states and 75498 transitions. [2021-11-20 06:55:24,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 06:55:24,112 INFO L276 IsEmpty]: Start isEmpty. Operand 51771 states and 75498 transitions. [2021-11-20 06:55:24,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-20 06:55:24,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:24,135 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:55:24,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:55:24,135 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:24,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:24,135 INFO L85 PathProgramCache]: Analyzing trace with hash 781133202, now seen corresponding path program 1 times [2021-11-20 06:55:24,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:24,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549979619] [2021-11-20 06:55:24,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:24,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:24,260 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 06:55:24,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:24,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549979619] [2021-11-20 06:55:24,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549979619] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:24,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:24,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:55:24,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417323287] [2021-11-20 06:55:24,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:24,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:55:24,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:24,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:55:24,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:55:24,264 INFO L87 Difference]: Start difference. First operand 51771 states and 75498 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 06:55:27,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:27,368 INFO L93 Difference]: Finished difference Result 82457 states and 120204 transitions. [2021-11-20 06:55:27,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:55:27,369 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 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 168 [2021-11-20 06:55:27,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:27,434 INFO L225 Difference]: With dead ends: 82457 [2021-11-20 06:55:27,434 INFO L226 Difference]: Without dead ends: 42355 [2021-11-20 06:55:27,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:55:27,467 INFO L933 BasicCegarLoop]: 526 mSDtfsCounter, 53 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1496 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:27,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 1496 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:55:27,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42355 states. [2021-11-20 06:55:30,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42355 to 42355. [2021-11-20 06:55:30,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42355 states, 42354 states have (on average 1.4537233791377437) internal successors, (61571), 42354 states have internal predecessors, (61571), 0 states have call successors, (0), 0 states 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 06:55:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42355 states to 42355 states and 61571 transitions. [2021-11-20 06:55:31,020 INFO L78 Accepts]: Start accepts. Automaton has 42355 states and 61571 transitions. Word has length 168 [2021-11-20 06:55:31,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:31,020 INFO L470 AbstractCegarLoop]: Abstraction has 42355 states and 61571 transitions. [2021-11-20 06:55:31,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 06:55:31,020 INFO L276 IsEmpty]: Start isEmpty. Operand 42355 states and 61571 transitions. [2021-11-20 06:55:31,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-20 06:55:31,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:31,037 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:55:31,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:55:31,038 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:31,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:31,039 INFO L85 PathProgramCache]: Analyzing trace with hash 227102220, now seen corresponding path program 1 times [2021-11-20 06:55:31,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:31,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461541937] [2021-11-20 06:55:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:31,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:31,101 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 06:55:31,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:31,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461541937] [2021-11-20 06:55:31,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461541937] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:31,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:31,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:55:31,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743666051] [2021-11-20 06:55:31,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:31,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:55:31,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:31,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:55:31,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:55:31,104 INFO L87 Difference]: Start difference. First operand 42355 states and 61571 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 06:55:36,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:36,085 INFO L93 Difference]: Finished difference Result 101038 states and 148810 transitions. [2021-11-20 06:55:36,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:55:36,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 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 172 [2021-11-20 06:55:36,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:36,188 INFO L225 Difference]: With dead ends: 101038 [2021-11-20 06:55:36,188 INFO L226 Difference]: Without dead ends: 66401 [2021-11-20 06:55:36,219 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 06:55:36,219 INFO L933 BasicCegarLoop]: 682 mSDtfsCounter, 301 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:36,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 1034 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:55:36,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66401 states.