./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label24.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945d7fab-ae81-41fa-9724-fdb86eb201b6/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945d7fab-ae81-41fa-9724-fdb86eb201b6/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945d7fab-ae81-41fa-9724-fdb86eb201b6/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945d7fab-ae81-41fa-9724-fdb86eb201b6/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label24.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945d7fab-ae81-41fa-9724-fdb86eb201b6/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945d7fab-ae81-41fa-9724-fdb86eb201b6/bin/uautomizer-tBqnrhUYjU --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 b3ef3977d042afb4071915ce97341123de4af0d70f58c82feb0983ea770e3ba0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:12:03,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:12:03,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:12:03,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:12:03,502 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:12:03,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:12:03,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:12:03,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:12:03,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:12:03,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:12:03,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:12:03,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:12:03,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:12:03,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:12:03,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:12:03,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:12:03,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:12:03,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:12:03,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:12:03,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:12:03,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:12:03,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:12:03,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:12:03,577 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:12:03,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:12:03,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:12:03,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:12:03,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:12:03,585 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:12:03,586 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:12:03,587 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:12:03,588 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:12:03,589 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:12:03,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:12:03,592 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:12:03,592 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:12:03,593 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:12:03,593 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:12:03,594 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:12:03,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:12:03,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:12:03,597 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945d7fab-ae81-41fa-9724-fdb86eb201b6/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:12:03,627 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:12:03,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:12:03,628 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:12:03,628 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:12:03,629 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:12:03,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:12:03,630 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:12:03,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:12:03,631 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:12:03,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:12:03,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:12:03,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:12:03,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:12:03,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:12:03,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:12:03,633 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:12:03,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:12:03,633 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:12:03,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:12:03,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:12:03,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:12:03,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:12:03,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:12:03,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:12:03,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:12:03,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:12:03,636 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:12:03,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:12:03,637 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:12:03,637 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:12:03,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:12:03,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:12:03,638 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_945d7fab-ae81-41fa-9724-fdb86eb201b6/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945d7fab-ae81-41fa-9724-fdb86eb201b6/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3ef3977d042afb4071915ce97341123de4af0d70f58c82feb0983ea770e3ba0 [2021-11-02 23:12:03,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:12:03,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:12:03,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:12:03,985 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:12:03,986 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:12:03,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945d7fab-ae81-41fa-9724-fdb86eb201b6/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/eca-rers2012/Problem17_label24.c [2021-11-02 23:12:04,062 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945d7fab-ae81-41fa-9724-fdb86eb201b6/bin/uautomizer-tBqnrhUYjU/data/2091ab946/6432fbc0c6fc40459f4c2a9a59bc2a37/FLAG183cb117d [2021-11-02 23:12:04,876 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:12:04,878 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945d7fab-ae81-41fa-9724-fdb86eb201b6/sv-benchmarks/c/eca-rers2012/Problem17_label24.c [2021-11-02 23:12:04,911 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945d7fab-ae81-41fa-9724-fdb86eb201b6/bin/uautomizer-tBqnrhUYjU/data/2091ab946/6432fbc0c6fc40459f4c2a9a59bc2a37/FLAG183cb117d [2021-11-02 23:12:04,961 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945d7fab-ae81-41fa-9724-fdb86eb201b6/bin/uautomizer-tBqnrhUYjU/data/2091ab946/6432fbc0c6fc40459f4c2a9a59bc2a37 [2021-11-02 23:12:04,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:12:04,968 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:12:04,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:12:04,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:12:04,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:12:04,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:12:04" (1/1) ... [2021-11-02 23:12:04,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f542a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:04, skipping insertion in model container [2021-11-02 23:12:04,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:12:04" (1/1) ... [2021-11-02 23:12:04,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:12:05,131 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:12:05,517 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945d7fab-ae81-41fa-9724-fdb86eb201b6/sv-benchmarks/c/eca-rers2012/Problem17_label24.c[8922,8935] [2021-11-02 23:12:06,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:12:06,563 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:12:06,617 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945d7fab-ae81-41fa-9724-fdb86eb201b6/sv-benchmarks/c/eca-rers2012/Problem17_label24.c[8922,8935] [2021-11-02 23:12:07,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:12:07,130 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:12:07,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:07 WrapperNode [2021-11-02 23:12:07,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:12:07,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:12:07,133 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:12:07,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:12:07,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:07" (1/1) ... [2021-11-02 23:12:07,220 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:07" (1/1) ... [2021-11-02 23:12:07,597 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:12:07,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:12:07,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:12:07,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:12:07,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:07" (1/1) ... [2021-11-02 23:12:07,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:07" (1/1) ... [2021-11-02 23:12:07,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:07" (1/1) ... [2021-11-02 23:12:07,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:07" (1/1) ... [2021-11-02 23:12:07,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:07" (1/1) ... [2021-11-02 23:12:07,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:07" (1/1) ... [2021-11-02 23:12:07,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:07" (1/1) ... [2021-11-02 23:12:08,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:12:08,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:12:08,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:12:08,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:12:08,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:07" (1/1) ... [2021-11-02 23:12:08,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:12:08,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945d7fab-ae81-41fa-9724-fdb86eb201b6/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:08,120 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945d7fab-ae81-41fa-9724-fdb86eb201b6/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:12:08,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945d7fab-ae81-41fa-9724-fdb86eb201b6/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:12:08,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:12:08,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:12:08,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:12:08,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:12:13,314 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:12:13,314 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-02 23:12:13,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:12:13 BoogieIcfgContainer [2021-11-02 23:12:13,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:12:13,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:12:13,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:12:13,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:12:13,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:12:04" (1/3) ... [2021-11-02 23:12:13,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c992429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:12:13, skipping insertion in model container [2021-11-02 23:12:13,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:07" (2/3) ... [2021-11-02 23:12:13,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c992429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:12:13, skipping insertion in model container [2021-11-02 23:12:13,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:12:13" (3/3) ... [2021-11-02 23:12:13,328 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label24.c [2021-11-02 23:12:13,334 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:12:13,334 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 23:12:13,391 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:12:13,398 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 [2021-11-02 23:12:13,398 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 23:12:13,431 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:13,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 23:12:13,442 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:13,443 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:13,443 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:13,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:13,450 INFO L85 PathProgramCache]: Analyzing trace with hash -634083006, now seen corresponding path program 1 times [2021-11-02 23:12:13,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:13,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928224493] [2021-11-02 23:12:13,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:13,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:13,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:13,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928224493] [2021-11-02 23:12:13,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928224493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:12:13,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:12:13,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 23:12:13,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81077358] [2021-11-02 23:12:13,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:12:13,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:13,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:12:13,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:13,964 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:18,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:18,159 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2021-11-02 23:12:18,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:12:18,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-02 23:12:18,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:18,191 INFO L225 Difference]: With dead ends: 1644 [2021-11-02 23:12:18,192 INFO L226 Difference]: Without dead ends: 977 [2021-11-02 23:12:18,199 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:18,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-11-02 23:12:18,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2021-11-02 23:12:18,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:18,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2021-11-02 23:12:18,325 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 60 [2021-11-02 23:12:18,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:18,326 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2021-11-02 23:12:18,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:18,327 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2021-11-02 23:12:18,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-02 23:12:18,334 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:18,334 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:18,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:12:18,335 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:18,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:18,336 INFO L85 PathProgramCache]: Analyzing trace with hash 373934106, now seen corresponding path program 1 times [2021-11-02 23:12:18,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:18,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559096977] [2021-11-02 23:12:18,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:18,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:18,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:18,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559096977] [2021-11-02 23:12:18,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559096977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:12:18,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:12:18,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 23:12:18,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098349901] [2021-11-02 23:12:18,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:12:18,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:18,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:12:18,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:18,519 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:22,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:22,242 INFO L93 Difference]: Finished difference Result 2813 states and 4381 transitions. [2021-11-02 23:12:22,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:12:22,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2021-11-02 23:12:22,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:22,256 INFO L225 Difference]: With dead ends: 2813 [2021-11-02 23:12:22,256 INFO L226 Difference]: Without dead ends: 1844 [2021-11-02 23:12:22,259 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:22,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-11-02 23:12:22,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1841. [2021-11-02 23:12:22,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.35) internal successors, (2484), 1840 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:22,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2484 transitions. [2021-11-02 23:12:22,359 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2484 transitions. Word has length 127 [2021-11-02 23:12:22,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:22,360 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 2484 transitions. [2021-11-02 23:12:22,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:22,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2484 transitions. [2021-11-02 23:12:22,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-02 23:12:22,364 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:22,364 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:22,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 23:12:22,365 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:22,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:22,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1612782126, now seen corresponding path program 1 times [2021-11-02 23:12:22,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:22,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389746642] [2021-11-02 23:12:22,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:22,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:22,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:22,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389746642] [2021-11-02 23:12:22,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389746642] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:12:22,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:12:22,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:12:22,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984928456] [2021-11-02 23:12:22,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:12:22,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:22,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:12:22,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:22,532 INFO L87 Difference]: Start difference. First operand 1841 states and 2484 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:26,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:26,038 INFO L93 Difference]: Finished difference Result 4552 states and 6282 transitions. [2021-11-02 23:12:26,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:12:26,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-11-02 23:12:26,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:26,059 INFO L225 Difference]: With dead ends: 4552 [2021-11-02 23:12:26,059 INFO L226 Difference]: Without dead ends: 2713 [2021-11-02 23:12:26,063 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:26,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-11-02 23:12:26,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2021-11-02 23:12:26,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 1.3003690036900368) internal successors, (3524), 2710 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:26,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3524 transitions. [2021-11-02 23:12:26,144 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3524 transitions. Word has length 130 [2021-11-02 23:12:26,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:26,145 INFO L470 AbstractCegarLoop]: Abstraction has 2711 states and 3524 transitions. [2021-11-02 23:12:26,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:26,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3524 transitions. [2021-11-02 23:12:26,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-02 23:12:26,149 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:26,150 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:26,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 23:12:26,151 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:26,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:26,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1390509399, now seen corresponding path program 1 times [2021-11-02 23:12:26,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:26,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013390532] [2021-11-02 23:12:26,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:26,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-02 23:12:26,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:26,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013390532] [2021-11-02 23:12:26,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013390532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:12:26,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:12:26,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 23:12:26,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236413299] [2021-11-02 23:12:26,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:12:26,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:26,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:12:26,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:26,367 INFO L87 Difference]: Start difference. First operand 2711 states and 3524 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:29,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:29,284 INFO L93 Difference]: Finished difference Result 7984 states and 10361 transitions. [2021-11-02 23:12:29,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:12:29,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 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 199 [2021-11-02 23:12:29,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:29,324 INFO L225 Difference]: With dead ends: 7984 [2021-11-02 23:12:29,325 INFO L226 Difference]: Without dead ends: 4421 [2021-11-02 23:12:29,331 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:29,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2021-11-02 23:12:29,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 3571. [2021-11-02 23:12:29,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 1.1775910364145659) internal successors, (4204), 3570 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 4204 transitions. [2021-11-02 23:12:29,434 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 4204 transitions. Word has length 199 [2021-11-02 23:12:29,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:29,435 INFO L470 AbstractCegarLoop]: Abstraction has 3571 states and 4204 transitions. [2021-11-02 23:12:29,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:29,436 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 4204 transitions. [2021-11-02 23:12:29,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-02 23:12:29,442 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:29,442 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:29,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 23:12:29,443 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:29,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:29,445 INFO L85 PathProgramCache]: Analyzing trace with hash -11472155, now seen corresponding path program 1 times [2021-11-02 23:12:29,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:29,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653648734] [2021-11-02 23:12:29,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:29,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:29,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:29,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:29,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653648734] [2021-11-02 23:12:29,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653648734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:12:29,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:12:29,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:12:29,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569802518] [2021-11-02 23:12:29,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:12:29,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:29,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:12:29,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:29,663 INFO L87 Difference]: Start difference. First operand 3571 states and 4204 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:32,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:32,555 INFO L93 Difference]: Finished difference Result 9273 states and 11087 transitions. [2021-11-02 23:12:32,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:12:32,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 212 [2021-11-02 23:12:32,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:32,593 INFO L225 Difference]: With dead ends: 9273 [2021-11-02 23:12:32,593 INFO L226 Difference]: Without dead ends: 5704 [2021-11-02 23:12:32,599 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:32,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5704 states. [2021-11-02 23:12:32,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5704 to 5704. [2021-11-02 23:12:32,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5704 states, 5703 states have (on average 1.1595651411537786) internal successors, (6613), 5703 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:32,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 6613 transitions. [2021-11-02 23:12:32,781 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 6613 transitions. Word has length 212 [2021-11-02 23:12:32,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:32,783 INFO L470 AbstractCegarLoop]: Abstraction has 5704 states and 6613 transitions. [2021-11-02 23:12:32,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:32,784 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 6613 transitions. [2021-11-02 23:12:32,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-02 23:12:32,789 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:32,789 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:32,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 23:12:32,790 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:32,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:32,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1357792544, now seen corresponding path program 1 times [2021-11-02 23:12:32,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:32,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335211895] [2021-11-02 23:12:32,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:32,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:32,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 23:12:32,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:32,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335211895] [2021-11-02 23:12:32,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335211895] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:12:32,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:12:32,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:12:32,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909407613] [2021-11-02 23:12:32,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:12:32,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:32,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:12:32,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:32,970 INFO L87 Difference]: Start difference. First operand 5704 states and 6613 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:35,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:35,602 INFO L93 Difference]: Finished difference Result 14376 states and 16776 transitions. [2021-11-02 23:12:35,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:12:35,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 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 214 [2021-11-02 23:12:35,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:35,662 INFO L225 Difference]: With dead ends: 14376 [2021-11-02 23:12:35,662 INFO L226 Difference]: Without dead ends: 8673 [2021-11-02 23:12:35,671 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:35,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8673 states. [2021-11-02 23:12:35,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8673 to 5677. [2021-11-02 23:12:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5677 states, 5676 states have (on average 1.1578576462297392) internal successors, (6572), 5676 states have internal predecessors, (6572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:35,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5677 states to 5677 states and 6572 transitions. [2021-11-02 23:12:35,843 INFO L78 Accepts]: Start accepts. Automaton has 5677 states and 6572 transitions. Word has length 214 [2021-11-02 23:12:35,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:35,844 INFO L470 AbstractCegarLoop]: Abstraction has 5677 states and 6572 transitions. [2021-11-02 23:12:35,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:35,845 INFO L276 IsEmpty]: Start isEmpty. Operand 5677 states and 6572 transitions. [2021-11-02 23:12:35,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-11-02 23:12:35,851 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:35,851 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:35,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 23:12:35,852 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:35,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:35,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1325464515, now seen corresponding path program 1 times [2021-11-02 23:12:35,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:35,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258533488] [2021-11-02 23:12:35,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:35,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 248 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-02 23:12:36,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:36,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258533488] [2021-11-02 23:12:36,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258533488] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:12:36,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:12:36,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:12:36,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115404563] [2021-11-02 23:12:36,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:12:36,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:36,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:12:36,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:36,161 INFO L87 Difference]: Start difference. First operand 5677 states and 6572 transitions. 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) [2021-11-02 23:12:38,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:38,501 INFO L93 Difference]: Finished difference Result 14315 states and 16680 transitions. [2021-11-02 23:12:38,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:12:38,510 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 292 [2021-11-02 23:12:38,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:38,547 INFO L225 Difference]: With dead ends: 14315 [2021-11-02 23:12:38,547 INFO L226 Difference]: Without dead ends: 7790 [2021-11-02 23:12:38,556 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:38,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2021-11-02 23:12:38,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 7790. [2021-11-02 23:12:38,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7790 states, 7789 states have (on average 1.1186288355372962) internal successors, (8713), 7789 states have internal predecessors, (8713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:38,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7790 states to 7790 states and 8713 transitions. [2021-11-02 23:12:38,737 INFO L78 Accepts]: Start accepts. Automaton has 7790 states and 8713 transitions. Word has length 292 [2021-11-02 23:12:38,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:38,738 INFO L470 AbstractCegarLoop]: Abstraction has 7790 states and 8713 transitions. [2021-11-02 23:12:38,738 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) [2021-11-02 23:12:38,738 INFO L276 IsEmpty]: Start isEmpty. Operand 7790 states and 8713 transitions. [2021-11-02 23:12:38,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-11-02 23:12:38,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:38,748 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:38,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 23:12:38,748 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:38,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:38,749 INFO L85 PathProgramCache]: Analyzing trace with hash 2130053414, now seen corresponding path program 1 times [2021-11-02 23:12:38,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:38,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436973830] [2021-11-02 23:12:38,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:38,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:38,961 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-02 23:12:38,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:38,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436973830] [2021-11-02 23:12:38,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436973830] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:12:38,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:12:38,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:12:38,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514133533] [2021-11-02 23:12:38,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:12:38,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:38,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:12:38,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:38,966 INFO L87 Difference]: Start difference. First operand 7790 states and 8713 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 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) [2021-11-02 23:12:41,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:41,396 INFO L93 Difference]: Finished difference Result 18558 states and 20949 transitions. [2021-11-02 23:12:41,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:12:41,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 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 332 [2021-11-02 23:12:41,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:41,429 INFO L225 Difference]: With dead ends: 18558 [2021-11-02 23:12:41,429 INFO L226 Difference]: Without dead ends: 10770 [2021-11-02 23:12:41,438 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:41,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10770 states. [2021-11-02 23:12:41,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10770 to 9916. [2021-11-02 23:12:41,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9916 states, 9915 states have (on average 1.1232476046394353) internal successors, (11137), 9915 states have internal predecessors, (11137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:41,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9916 states to 9916 states and 11137 transitions. [2021-11-02 23:12:41,627 INFO L78 Accepts]: Start accepts. Automaton has 9916 states and 11137 transitions. Word has length 332 [2021-11-02 23:12:41,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:41,628 INFO L470 AbstractCegarLoop]: Abstraction has 9916 states and 11137 transitions. [2021-11-02 23:12:41,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 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) [2021-11-02 23:12:41,629 INFO L276 IsEmpty]: Start isEmpty. Operand 9916 states and 11137 transitions. [2021-11-02 23:12:41,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2021-11-02 23:12:41,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:41,640 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:41,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 23:12:41,641 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:41,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:41,642 INFO L85 PathProgramCache]: Analyzing trace with hash 273177675, now seen corresponding path program 1 times [2021-11-02 23:12:41,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:41,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359323370] [2021-11-02 23:12:41,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:41,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-02 23:12:41,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:41,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359323370] [2021-11-02 23:12:41,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359323370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:12:41,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:12:41,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:12:41,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184543483] [2021-11-02 23:12:41,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:12:41,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:41,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:12:41,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:41,849 INFO L87 Difference]: Start difference. First operand 9916 states and 11137 transitions. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:44,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:44,596 INFO L93 Difference]: Finished difference Result 27952 states and 31474 transitions. [2021-11-02 23:12:44,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:12:44,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 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 349 [2021-11-02 23:12:44,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:44,639 INFO L225 Difference]: With dead ends: 27952 [2021-11-02 23:12:44,639 INFO L226 Difference]: Without dead ends: 18038 [2021-11-02 23:12:44,648 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:44,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18038 states. [2021-11-02 23:12:44,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18038 to 17163. [2021-11-02 23:12:44,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17163 states, 17162 states have (on average 1.1156625101969468) internal successors, (19147), 17162 states have internal predecessors, (19147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:44,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17163 states to 17163 states and 19147 transitions. [2021-11-02 23:12:44,963 INFO L78 Accepts]: Start accepts. Automaton has 17163 states and 19147 transitions. Word has length 349 [2021-11-02 23:12:44,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:44,964 INFO L470 AbstractCegarLoop]: Abstraction has 17163 states and 19147 transitions. [2021-11-02 23:12:44,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:44,965 INFO L276 IsEmpty]: Start isEmpty. Operand 17163 states and 19147 transitions. [2021-11-02 23:12:44,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2021-11-02 23:12:44,982 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:44,983 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:44,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 23:12:44,984 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:44,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:44,984 INFO L85 PathProgramCache]: Analyzing trace with hash 903485880, now seen corresponding path program 1 times [2021-11-02 23:12:44,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:44,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381082967] [2021-11-02 23:12:44,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:44,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:45,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:45,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381082967] [2021-11-02 23:12:45,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381082967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:12:45,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:12:45,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:12:45,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978157353] [2021-11-02 23:12:45,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:12:45,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:45,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:12:45,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:12:45,225 INFO L87 Difference]: Start difference. First operand 17163 states and 19147 transitions. Second operand has 4 states, 4 states have (on average 99.75) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:48,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:48,832 INFO L93 Difference]: Finished difference Result 42008 states and 46867 transitions. [2021-11-02 23:12:48,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:12:48,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 99.75) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 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 399 [2021-11-02 23:12:48,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:48,899 INFO L225 Difference]: With dead ends: 42008 [2021-11-02 23:12:48,900 INFO L226 Difference]: Without dead ends: 24422 [2021-11-02 23:12:48,919 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:12:48,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24422 states. [2021-11-02 23:12:49,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24422 to 24420. [2021-11-02 23:12:49,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24420 states, 24419 states have (on average 1.1172857201359596) internal successors, (27283), 24419 states have internal predecessors, (27283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:49,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24420 states to 24420 states and 27283 transitions. [2021-11-02 23:12:49,366 INFO L78 Accepts]: Start accepts. Automaton has 24420 states and 27283 transitions. Word has length 399 [2021-11-02 23:12:49,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:49,367 INFO L470 AbstractCegarLoop]: Abstraction has 24420 states and 27283 transitions. [2021-11-02 23:12:49,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.75) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:49,368 INFO L276 IsEmpty]: Start isEmpty. Operand 24420 states and 27283 transitions. [2021-11-02 23:12:49,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2021-11-02 23:12:49,386 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:49,386 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:49,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 23:12:49,387 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:49,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:49,388 INFO L85 PathProgramCache]: Analyzing trace with hash 231337437, now seen corresponding path program 1 times [2021-11-02 23:12:49,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:49,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622262417] [2021-11-02 23:12:49,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:49,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 318 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-02 23:12:49,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:49,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622262417] [2021-11-02 23:12:49,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622262417] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:12:49,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:12:49,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:12:49,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198625601] [2021-11-02 23:12:49,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:12:49,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:49,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:12:49,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:49,642 INFO L87 Difference]: Start difference. First operand 24420 states and 27283 transitions. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:52,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:52,450 INFO L93 Difference]: Finished difference Result 55245 states and 61737 transitions. [2021-11-02 23:12:52,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:12:52,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 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 420 [2021-11-02 23:12:52,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:52,497 INFO L225 Difference]: With dead ends: 55245 [2021-11-02 23:12:52,497 INFO L226 Difference]: Without dead ends: 30827 [2021-11-02 23:12:52,515 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:52,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30827 states. [2021-11-02 23:12:52,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30827 to 23983. [2021-11-02 23:12:52,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23983 states, 23982 states have (on average 1.1184221499457927) internal successors, (26822), 23982 states have internal predecessors, (26822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:52,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23983 states to 23983 states and 26822 transitions. [2021-11-02 23:12:52,922 INFO L78 Accepts]: Start accepts. Automaton has 23983 states and 26822 transitions. Word has length 420 [2021-11-02 23:12:52,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:52,923 INFO L470 AbstractCegarLoop]: Abstraction has 23983 states and 26822 transitions. [2021-11-02 23:12:52,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:52,923 INFO L276 IsEmpty]: Start isEmpty. Operand 23983 states and 26822 transitions. [2021-11-02 23:12:52,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2021-11-02 23:12:52,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:52,940 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:52,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 23:12:52,941 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:52,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:52,942 INFO L85 PathProgramCache]: Analyzing trace with hash 782937122, now seen corresponding path program 1 times [2021-11-02 23:12:52,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:52,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435331704] [2021-11-02 23:12:52,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:52,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 314 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-02 23:12:53,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:53,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435331704] [2021-11-02 23:12:53,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435331704] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:12:53,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:12:53,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:12:53,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632124301] [2021-11-02 23:12:53,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:12:53,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:53,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:12:53,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:53,188 INFO L87 Difference]: Start difference. First operand 23983 states and 26822 transitions. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:56,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:56,079 INFO L93 Difference]: Finished difference Result 57340 states and 64370 transitions. [2021-11-02 23:12:56,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:12:56,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 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 421 [2021-11-02 23:12:56,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:56,129 INFO L225 Difference]: With dead ends: 57340 [2021-11-02 23:12:56,129 INFO L226 Difference]: Without dead ends: 33359 [2021-11-02 23:12:56,146 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:56,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33359 states. [2021-11-02 23:12:56,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33359 to 33341. [2021-11-02 23:12:56,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33341 states, 33340 states have (on average 1.1147870425914816) internal successors, (37167), 33340 states have internal predecessors, (37167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:56,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33341 states to 33341 states and 37167 transitions. [2021-11-02 23:12:56,855 INFO L78 Accepts]: Start accepts. Automaton has 33341 states and 37167 transitions. Word has length 421 [2021-11-02 23:12:56,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:56,857 INFO L470 AbstractCegarLoop]: Abstraction has 33341 states and 37167 transitions. [2021-11-02 23:12:56,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:56,858 INFO L276 IsEmpty]: Start isEmpty. Operand 33341 states and 37167 transitions. [2021-11-02 23:12:56,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2021-11-02 23:12:56,872 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:56,873 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:56,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 23:12:56,874 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:56,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:56,875 INFO L85 PathProgramCache]: Analyzing trace with hash -649020687, now seen corresponding path program 1 times [2021-11-02 23:12:56,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:56,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031692052] [2021-11-02 23:12:56,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:56,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-11-02 23:12:57,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:57,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031692052] [2021-11-02 23:12:57,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031692052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:12:57,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:12:57,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:12:57,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170527410] [2021-11-02 23:12:57,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:12:57,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:57,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:12:57,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:57,297 INFO L87 Difference]: Start difference. First operand 33341 states and 37167 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:00,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:00,168 INFO L93 Difference]: Finished difference Result 75204 states and 83736 transitions. [2021-11-02 23:13:00,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:13:00,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 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 428 [2021-11-02 23:13:00,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:00,225 INFO L225 Difference]: With dead ends: 75204 [2021-11-02 23:13:00,225 INFO L226 Difference]: Without dead ends: 40158 [2021-11-02 23:13:00,246 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:13:00,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40158 states. [2021-11-02 23:13:00,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40158 to 38863. [2021-11-02 23:13:01,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38863 states, 38862 states have (on average 1.106324944676033) internal successors, (42994), 38862 states have internal predecessors, (42994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:01,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38863 states to 38863 states and 42994 transitions. [2021-11-02 23:13:01,084 INFO L78 Accepts]: Start accepts. Automaton has 38863 states and 42994 transitions. Word has length 428 [2021-11-02 23:13:01,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:01,085 INFO L470 AbstractCegarLoop]: Abstraction has 38863 states and 42994 transitions. [2021-11-02 23:13:01,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:01,086 INFO L276 IsEmpty]: Start isEmpty. Operand 38863 states and 42994 transitions. [2021-11-02 23:13:01,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2021-11-02 23:13:01,107 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:01,108 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:01,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 23:13:01,109 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:01,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:01,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1856333145, now seen corresponding path program 1 times [2021-11-02 23:13:01,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:01,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236928430] [2021-11-02 23:13:01,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:01,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:01,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:01,828 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 115 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:01,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:01,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236928430] [2021-11-02 23:13:01,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236928430] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:01,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482778109] [2021-11-02 23:13:01,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:01,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:01,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945d7fab-ae81-41fa-9724-fdb86eb201b6/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:01,832 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945d7fab-ae81-41fa-9724-fdb86eb201b6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:01,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945d7fab-ae81-41fa-9724-fdb86eb201b6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:13:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:02,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:13:02,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 115 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:05,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482778109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:05,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:05,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-11-02 23:13:05,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910377799] [2021-11-02 23:13:05,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:13:05,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:05,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:13:05,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:13:05,822 INFO L87 Difference]: Start difference. First operand 38863 states and 42994 transitions. Second operand has 9 states, 9 states have (on average 92.44444444444444) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:14,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:14,856 INFO L93 Difference]: Finished difference Result 104591 states and 115106 transitions. [2021-11-02 23:13:14,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:13:14,857 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 92.44444444444444) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 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 446 [2021-11-02 23:13:14,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:15,083 INFO L225 Difference]: With dead ends: 104591 [2021-11-02 23:13:15,083 INFO L226 Difference]: Without dead ends: 65730 [2021-11-02 23:13:15,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:13:15,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65730 states. [2021-11-02 23:13:15,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65730 to 39713. [2021-11-02 23:13:15,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39713 states, 39712 states have (on average 1.104175060435133) internal successors, (43849), 39712 states have internal predecessors, (43849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:15,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39713 states to 39713 states and 43849 transitions. [2021-11-02 23:13:15,982 INFO L78 Accepts]: Start accepts. Automaton has 39713 states and 43849 transitions. Word has length 446 [2021-11-02 23:13:15,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:15,983 INFO L470 AbstractCegarLoop]: Abstraction has 39713 states and 43849 transitions. [2021-11-02 23:13:15,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 92.44444444444444) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:15,983 INFO L276 IsEmpty]: Start isEmpty. Operand 39713 states and 43849 transitions. [2021-11-02 23:13:15,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2021-11-02 23:13:15,994 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:15,995 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:16,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945d7fab-ae81-41fa-9724-fdb86eb201b6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:16,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945d7fab-ae81-41fa-9724-fdb86eb201b6/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:16,201 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:16,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:16,202 INFO L85 PathProgramCache]: Analyzing trace with hash 653691728, now seen corresponding path program 1 times [2021-11-02 23:13:16,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:16,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039625280] [2021-11-02 23:13:16,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:16,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-02 23:13:16,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:16,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039625280] [2021-11-02 23:13:16,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039625280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:16,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:16,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:13:16,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701552498] [2021-11-02 23:13:16,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:13:16,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:16,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:13:16,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:13:16,464 INFO L87 Difference]: Start difference. First operand 39713 states and 43849 transitions. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:19,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:19,602 INFO L93 Difference]: Finished difference Result 89201 states and 98880 transitions. [2021-11-02 23:13:19,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:13:19,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 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 464 [2021-11-02 23:13:19,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:19,653 INFO L225 Difference]: With dead ends: 89201 [2021-11-02 23:13:19,654 INFO L226 Difference]: Without dead ends: 46924 [2021-11-02 23:13:19,681 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:13:19,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46924 states. [2021-11-02 23:13:20,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46924 to 46919. [2021-11-02 23:13:20,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46919 states, 46918 states have (on average 1.0877488383989087) internal successors, (51035), 46918 states have internal predecessors, (51035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:20,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46919 states to 46919 states and 51035 transitions. [2021-11-02 23:13:20,574 INFO L78 Accepts]: Start accepts. Automaton has 46919 states and 51035 transitions. Word has length 464 [2021-11-02 23:13:20,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:20,575 INFO L470 AbstractCegarLoop]: Abstraction has 46919 states and 51035 transitions. [2021-11-02 23:13:20,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:20,575 INFO L276 IsEmpty]: Start isEmpty. Operand 46919 states and 51035 transitions. [2021-11-02 23:13:20,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 830 [2021-11-02 23:13:20,622 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:20,623 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:20,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 23:13:20,624 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:20,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:20,625 INFO L85 PathProgramCache]: Analyzing trace with hash -514944544, now seen corresponding path program 1 times [2021-11-02 23:13:20,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:20,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608182180] [2021-11-02 23:13:20,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:20,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 556 proven. 0 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2021-11-02 23:13:21,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:21,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608182180] [2021-11-02 23:13:21,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608182180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:21,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:21,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:13:21,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290625029] [2021-11-02 23:13:21,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:13:21,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:21,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:13:21,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:13:21,243 INFO L87 Difference]: Start difference. First operand 46919 states and 51035 transitions. Second operand has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:24,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:24,083 INFO L93 Difference]: Finished difference Result 98941 states and 107959 transitions. [2021-11-02 23:13:24,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:13:24,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 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 829 [2021-11-02 23:13:24,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:24,138 INFO L225 Difference]: With dead ends: 98941 [2021-11-02 23:13:24,138 INFO L226 Difference]: Without dead ends: 52874 [2021-11-02 23:13:24,158 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:13:24,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52874 states. [2021-11-02 23:13:24,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52874 to 47763. [2021-11-02 23:13:24,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47763 states, 47762 states have (on average 1.0890247477073824) internal successors, (52014), 47762 states have internal predecessors, (52014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:24,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47763 states to 47763 states and 52014 transitions. [2021-11-02 23:13:24,921 INFO L78 Accepts]: Start accepts. Automaton has 47763 states and 52014 transitions. Word has length 829 [2021-11-02 23:13:24,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:24,922 INFO L470 AbstractCegarLoop]: Abstraction has 47763 states and 52014 transitions. [2021-11-02 23:13:24,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:24,922 INFO L276 IsEmpty]: Start isEmpty. Operand 47763 states and 52014 transitions. [2021-11-02 23:13:25,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 869 [2021-11-02 23:13:25,146 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:25,147 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:25,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 23:13:25,147 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:25,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:25,148 INFO L85 PathProgramCache]: Analyzing trace with hash -850061072, now seen corresponding path program 1 times [2021-11-02 23:13:25,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:25,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281319816] [2021-11-02 23:13:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:25,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 757 proven. 0 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2021-11-02 23:13:25,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:25,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281319816] [2021-11-02 23:13:25,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281319816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:25,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:25,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:13:25,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435334333] [2021-11-02 23:13:25,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:13:25,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:25,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:13:25,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:13:25,852 INFO L87 Difference]: Start difference. First operand 47763 states and 52014 transitions. Second operand has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:30,225 INFO L93 Difference]: Finished difference Result 110446 states and 120057 transitions. [2021-11-02 23:13:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:13:30,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 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 868 [2021-11-02 23:13:30,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:30,291 INFO L225 Difference]: With dead ends: 110446 [2021-11-02 23:13:30,291 INFO L226 Difference]: Without dead ends: 62260 [2021-11-02 23:13:30,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:13:30,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62260 states. [2021-11-02 23:13:31,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62260 to 46905. [2021-11-02 23:13:31,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46905 states, 46904 states have (on average 1.0849394507931094) internal successors, (50888), 46904 states have internal predecessors, (50888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:31,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46905 states to 46905 states and 50888 transitions. [2021-11-02 23:13:31,268 INFO L78 Accepts]: Start accepts. Automaton has 46905 states and 50888 transitions. Word has length 868 [2021-11-02 23:13:31,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:31,269 INFO L470 AbstractCegarLoop]: Abstraction has 46905 states and 50888 transitions. [2021-11-02 23:13:31,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:31,269 INFO L276 IsEmpty]: Start isEmpty. Operand 46905 states and 50888 transitions. [2021-11-02 23:13:31,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 889 [2021-11-02 23:13:31,310 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:31,311 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:31,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 23:13:31,311 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:31,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:31,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1567356217, now seen corresponding path program 1 times [2021-11-02 23:13:31,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:31,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325378340] [2021-11-02 23:13:31,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:31,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1233 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-11-02 23:13:31,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:31,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325378340] [2021-11-02 23:13:31,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325378340] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:31,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:31,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:13:31,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93304116] [2021-11-02 23:13:31,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:13:31,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:31,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:13:31,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:13:31,914 INFO L87 Difference]: Start difference. First operand 46905 states and 50888 transitions. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:34,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:34,728 INFO L93 Difference]: Finished difference Result 99757 states and 108537 transitions. [2021-11-02 23:13:34,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:13:34,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 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 888 [2021-11-02 23:13:34,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:34,804 INFO L225 Difference]: With dead ends: 99757 [2021-11-02 23:13:34,804 INFO L226 Difference]: Without dead ends: 51994 [2021-11-02 23:13:34,831 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:13:34,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51994 states. [2021-11-02 23:13:35,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51994 to 46890. [2021-11-02 23:13:35,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46890 states, 46889 states have (on average 1.0726183113310157) internal successors, (50294), 46889 states have internal predecessors, (50294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:35,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46890 states to 46890 states and 50294 transitions. [2021-11-02 23:13:35,635 INFO L78 Accepts]: Start accepts. Automaton has 46890 states and 50294 transitions. Word has length 888 [2021-11-02 23:13:35,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:35,636 INFO L470 AbstractCegarLoop]: Abstraction has 46890 states and 50294 transitions. [2021-11-02 23:13:35,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:35,636 INFO L276 IsEmpty]: Start isEmpty. Operand 46890 states and 50294 transitions. [2021-11-02 23:13:35,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 982 [2021-11-02 23:13:35,677 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:35,679 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:35,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 23:13:35,679 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:35,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:35,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1128886848, now seen corresponding path program 1 times [2021-11-02 23:13:35,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:35,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879584462] [2021-11-02 23:13:35,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:35,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:35,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:36,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1468 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 1178 trivial. 0 not checked. [2021-11-02 23:13:36,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:36,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879584462] [2021-11-02 23:13:36,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879584462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:36,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:36,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 23:13:36,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431700217] [2021-11-02 23:13:36,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:13:36,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:36,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:13:36,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:13:36,679 INFO L87 Difference]: Start difference. First operand 46890 states and 50294 transitions. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 2 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:38,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:38,029 INFO L93 Difference]: Finished difference Result 91216 states and 97929 transitions. [2021-11-02 23:13:38,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:13:38,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 2 states have internal predecessors, (373), 0 states have call successors, (0), 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 981 [2021-11-02 23:13:38,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:38,077 INFO L225 Difference]: With dead ends: 91216 [2021-11-02 23:13:38,077 INFO L226 Difference]: Without dead ends: 45176 [2021-11-02 23:13:38,096 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:13:38,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45176 states. [2021-11-02 23:13:38,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45176 to 45172. [2021-11-02 23:13:38,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45172 states, 45171 states have (on average 1.072945031104027) internal successors, (48466), 45171 states have internal predecessors, (48466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:38,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45172 states to 45172 states and 48466 transitions. [2021-11-02 23:13:38,816 INFO L78 Accepts]: Start accepts. Automaton has 45172 states and 48466 transitions. Word has length 981 [2021-11-02 23:13:38,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:38,816 INFO L470 AbstractCegarLoop]: Abstraction has 45172 states and 48466 transitions. [2021-11-02 23:13:38,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 2 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:38,817 INFO L276 IsEmpty]: Start isEmpty. Operand 45172 states and 48466 transitions. [2021-11-02 23:13:38,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1005 [2021-11-02 23:13:38,846 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:38,846 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:38,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 23:13:38,847 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:38,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:38,847 INFO L85 PathProgramCache]: Analyzing trace with hash -280189066, now seen corresponding path program 1 times [2021-11-02 23:13:38,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:38,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678116261] [2021-11-02 23:13:38,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:38,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:39,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1481 backedges. 915 proven. 0 refuted. 0 times theorem prover too weak. 566 trivial. 0 not checked. [2021-11-02 23:13:39,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:39,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678116261] [2021-11-02 23:13:39,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678116261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:39,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:39,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:13:39,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677217595] [2021-11-02 23:13:39,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:13:39,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:39,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:13:39,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:13:39,630 INFO L87 Difference]: Start difference. First operand 45172 states and 48466 transitions. Second operand has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:42,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:42,204 INFO L93 Difference]: Finished difference Result 92472 states and 99247 transitions. [2021-11-02 23:13:42,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:13:42,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 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 1004 [2021-11-02 23:13:42,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:42,254 INFO L225 Difference]: With dead ends: 92472 [2021-11-02 23:13:42,254 INFO L226 Difference]: Without dead ends: 48152 [2021-11-02 23:13:42,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:13:42,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48152 states. [2021-11-02 23:13:43,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48152 to 45171. [2021-11-02 23:13:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45171 states, 45170 states have (on average 1.0669028116006198) internal successors, (48192), 45170 states have internal predecessors, (48192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:43,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45171 states to 45171 states and 48192 transitions. [2021-11-02 23:13:43,097 INFO L78 Accepts]: Start accepts. Automaton has 45171 states and 48192 transitions. Word has length 1004 [2021-11-02 23:13:43,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:43,099 INFO L470 AbstractCegarLoop]: Abstraction has 45171 states and 48192 transitions. [2021-11-02 23:13:43,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:43,099 INFO L276 IsEmpty]: Start isEmpty. Operand 45171 states and 48192 transitions. [2021-11-02 23:13:43,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1068 [2021-11-02 23:13:43,136 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:43,137 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:43,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 23:13:43,137 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:43,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:43,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1707480947, now seen corresponding path program 1 times [2021-11-02 23:13:43,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:43,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675155648] [2021-11-02 23:13:43,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:43,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1921 backedges. 1618 proven. 0 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2021-11-02 23:13:43,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:43,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675155648] [2021-11-02 23:13:43,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675155648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:43,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:43,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:13:43,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693634347] [2021-11-02 23:13:43,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:13:43,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:43,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:13:43,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:13:43,762 INFO L87 Difference]: Start difference. First operand 45171 states and 48192 transitions. Second operand has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:47,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:47,738 INFO L93 Difference]: Finished difference Result 107370 states and 114678 transitions. [2021-11-02 23:13:47,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:13:47,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 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 1067 [2021-11-02 23:13:47,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:47,800 INFO L225 Difference]: With dead ends: 107370 [2021-11-02 23:13:47,800 INFO L226 Difference]: Without dead ends: 63051 [2021-11-02 23:13:47,821 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:13:47,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63051 states. [2021-11-02 23:13:48,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63051 to 55815. [2021-11-02 23:13:48,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55815 states, 55814 states have (on average 1.0663453613788656) internal successors, (59517), 55814 states have internal predecessors, (59517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:48,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55815 states to 55815 states and 59517 transitions. [2021-11-02 23:13:48,716 INFO L78 Accepts]: Start accepts. Automaton has 55815 states and 59517 transitions. Word has length 1067 [2021-11-02 23:13:48,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:48,716 INFO L470 AbstractCegarLoop]: Abstraction has 55815 states and 59517 transitions. [2021-11-02 23:13:48,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:48,717 INFO L276 IsEmpty]: Start isEmpty. Operand 55815 states and 59517 transitions. [2021-11-02 23:13:48,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1176 [2021-11-02 23:13:48,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:48,756 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:48,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-02 23:13:48,757 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:48,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:48,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1053545012, now seen corresponding path program 1 times [2021-11-02 23:13:48,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:48,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000301125] [2021-11-02 23:13:48,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:48,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2568 backedges. 1202 proven. 0 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2021-11-02 23:13:49,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:49,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000301125] [2021-11-02 23:13:49,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000301125] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:49,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:49,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:13:49,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126355033] [2021-11-02 23:13:49,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:13:49,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:49,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:13:49,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:13:49,798 INFO L87 Difference]: Start difference. First operand 55815 states and 59517 transitions. Second operand has 3 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:52,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:52,376 INFO L93 Difference]: Finished difference Result 117998 states and 125753 transitions. [2021-11-02 23:13:52,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:13:52,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 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 1175 [2021-11-02 23:13:52,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:52,447 INFO L225 Difference]: With dead ends: 117998 [2021-11-02 23:13:52,447 INFO L226 Difference]: Without dead ends: 62181 [2021-11-02 23:13:52,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:13:52,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62181 states. [2021-11-02 23:13:53,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62181 to 61749. [2021-11-02 23:13:53,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61749 states, 61748 states have (on average 1.0592569799831573) internal successors, (65407), 61748 states have internal predecessors, (65407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:53,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61749 states to 61749 states and 65407 transitions. [2021-11-02 23:13:53,636 INFO L78 Accepts]: Start accepts. Automaton has 61749 states and 65407 transitions. Word has length 1175 [2021-11-02 23:13:53,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:53,637 INFO L470 AbstractCegarLoop]: Abstraction has 61749 states and 65407 transitions. [2021-11-02 23:13:53,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:53,637 INFO L276 IsEmpty]: Start isEmpty. Operand 61749 states and 65407 transitions. [2021-11-02 23:13:53,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1268 [2021-11-02 23:13:53,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:53,720 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:53,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-02 23:13:53,721 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:53,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:53,722 INFO L85 PathProgramCache]: Analyzing trace with hash -849860214, now seen corresponding path program 1 times [2021-11-02 23:13:53,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:53,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079608731] [2021-11-02 23:13:53,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:53,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 1516 proven. 0 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-11-02 23:13:54,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:54,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079608731] [2021-11-02 23:13:54,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079608731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:54,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:54,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:13:54,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124597575] [2021-11-02 23:13:54,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:13:54,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:54,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:13:54,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:13:54,673 INFO L87 Difference]: Start difference. First operand 61749 states and 65407 transitions. Second operand has 3 states, 3 states have (on average 316.6666666666667) internal successors, (950), 3 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:56,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:56,785 INFO L93 Difference]: Finished difference Result 120514 states and 127601 transitions. [2021-11-02 23:13:56,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:13:56,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 316.6666666666667) internal successors, (950), 3 states have internal predecessors, (950), 0 states have call successors, (0), 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 1267 [2021-11-02 23:13:56,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:56,841 INFO L225 Difference]: With dead ends: 120514 [2021-11-02 23:13:56,841 INFO L226 Difference]: Without dead ends: 59617 [2021-11-02 23:13:56,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:13:56,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59617 states. [2021-11-02 23:13:57,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59617 to 57915. [2021-11-02 23:13:57,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57915 states, 57914 states have (on average 1.0515592084815415) internal successors, (60900), 57914 states have internal predecessors, (60900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57915 states to 57915 states and 60900 transitions. [2021-11-02 23:13:57,864 INFO L78 Accepts]: Start accepts. Automaton has 57915 states and 60900 transitions. Word has length 1267 [2021-11-02 23:13:57,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:57,865 INFO L470 AbstractCegarLoop]: Abstraction has 57915 states and 60900 transitions. [2021-11-02 23:13:57,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 316.6666666666667) internal successors, (950), 3 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:57,866 INFO L276 IsEmpty]: Start isEmpty. Operand 57915 states and 60900 transitions. [2021-11-02 23:13:57,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1348 [2021-11-02 23:13:57,938 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:57,939 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:57,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-02 23:13:57,940 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:57,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:57,941 INFO L85 PathProgramCache]: Analyzing trace with hash -500171333, now seen corresponding path program 1 times [2021-11-02 23:13:57,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:57,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680249638] [2021-11-02 23:13:57,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:57,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:59,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2230 backedges. 347 proven. 0 refuted. 0 times theorem prover too weak. 1883 trivial. 0 not checked. [2021-11-02 23:13:59,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:59,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680249638] [2021-11-02 23:13:59,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680249638] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:59,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:59,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:13:59,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746381228] [2021-11-02 23:13:59,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:13:59,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:59,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:13:59,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:13:59,064 INFO L87 Difference]: Start difference. First operand 57915 states and 60900 transitions. Second operand has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:02,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:02,999 INFO L93 Difference]: Finished difference Result 121807 states and 128122 transitions. [2021-11-02 23:14:03,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:14:03,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 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 1347 [2021-11-02 23:14:03,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:03,066 INFO L225 Difference]: With dead ends: 121807 [2021-11-02 23:14:03,066 INFO L226 Difference]: Without dead ends: 64317 [2021-11-02 23:14:03,087 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:14:03,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64317 states. [2021-11-02 23:14:03,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64317 to 58338. [2021-11-02 23:14:03,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58338 states, 58337 states have (on average 1.0506882424533315) internal successors, (61294), 58337 states have internal predecessors, (61294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:03,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58338 states to 58338 states and 61294 transitions. [2021-11-02 23:14:03,970 INFO L78 Accepts]: Start accepts. Automaton has 58338 states and 61294 transitions. Word has length 1347 [2021-11-02 23:14:03,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:04,241 INFO L470 AbstractCegarLoop]: Abstraction has 58338 states and 61294 transitions. [2021-11-02 23:14:04,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:04,242 INFO L276 IsEmpty]: Start isEmpty. Operand 58338 states and 61294 transitions. [2021-11-02 23:14:04,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1367 [2021-11-02 23:14:04,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:04,327 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:04,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-02 23:14:04,328 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:04,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:04,328 INFO L85 PathProgramCache]: Analyzing trace with hash 168391135, now seen corresponding path program 1 times [2021-11-02 23:14:04,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:04,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546125480] [2021-11-02 23:14:04,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:04,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3296 backedges. 2582 proven. 0 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2021-11-02 23:14:04,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:04,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546125480] [2021-11-02 23:14:04,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546125480] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:14:04,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:14:04,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:14:04,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335106441] [2021-11-02 23:14:04,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:14:04,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:04,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:14:04,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:14:04,980 INFO L87 Difference]: Start difference. First operand 58338 states and 61294 transitions. Second operand has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:10,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:10,557 INFO L93 Difference]: Finished difference Result 131154 states and 137920 transitions. [2021-11-02 23:14:10,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:14:10,558 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 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 1366 [2021-11-02 23:14:10,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:10,626 INFO L225 Difference]: With dead ends: 131154 [2021-11-02 23:14:10,626 INFO L226 Difference]: Without dead ends: 73668 [2021-11-02 23:14:10,652 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:14:10,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73668 states. [2021-11-02 23:14:11,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73668 to 59613. [2021-11-02 23:14:11,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59613 states, 59612 states have (on average 1.050258337247534) internal successors, (62608), 59612 states have internal predecessors, (62608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:11,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59613 states to 59613 states and 62608 transitions. [2021-11-02 23:14:11,539 INFO L78 Accepts]: Start accepts. Automaton has 59613 states and 62608 transitions. Word has length 1366 [2021-11-02 23:14:11,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:11,540 INFO L470 AbstractCegarLoop]: Abstraction has 59613 states and 62608 transitions. [2021-11-02 23:14:11,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:11,541 INFO L276 IsEmpty]: Start isEmpty. Operand 59613 states and 62608 transitions. [2021-11-02 23:14:11,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1439 [2021-11-02 23:14:11,601 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:11,602 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:11,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-02 23:14:11,602 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:11,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:11,603 INFO L85 PathProgramCache]: Analyzing trace with hash -712733974, now seen corresponding path program 1 times [2021-11-02 23:14:11,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:11,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277686672] [2021-11-02 23:14:11,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:11,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:12,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2418 backedges. 1282 proven. 0 refuted. 0 times theorem prover too weak. 1136 trivial. 0 not checked. [2021-11-02 23:14:12,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:12,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277686672] [2021-11-02 23:14:12,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277686672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:14:12,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:14:12,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:14:12,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688246084] [2021-11-02 23:14:12,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:14:12,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:12,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:14:12,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:14:12,316 INFO L87 Difference]: Start difference. First operand 59613 states and 62608 transitions. Second operand has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:16,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:16,325 INFO L93 Difference]: Finished difference Result 147317 states and 154867 transitions. [2021-11-02 23:14:16,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:14:16,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 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 1438 [2021-11-02 23:14:16,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:16,408 INFO L225 Difference]: With dead ends: 147317 [2021-11-02 23:14:16,409 INFO L226 Difference]: Without dead ends: 88131 [2021-11-02 23:14:16,442 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:14:16,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88131 states. [2021-11-02 23:14:17,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88131 to 71539. [2021-11-02 23:14:17,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71539 states, 71538 states have (on average 1.0501411837065615) internal successors, (75125), 71538 states have internal predecessors, (75125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:17,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71539 states to 71539 states and 75125 transitions. [2021-11-02 23:14:17,685 INFO L78 Accepts]: Start accepts. Automaton has 71539 states and 75125 transitions. Word has length 1438 [2021-11-02 23:14:17,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:17,686 INFO L470 AbstractCegarLoop]: Abstraction has 71539 states and 75125 transitions. [2021-11-02 23:14:17,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 71539 states and 75125 transitions. [2021-11-02 23:14:17,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1452 [2021-11-02 23:14:17,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:17,747 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:17,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-02 23:14:17,748 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:17,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:17,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1064560886, now seen corresponding path program 1 times [2021-11-02 23:14:17,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:17,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060968065] [2021-11-02 23:14:17,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:17,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:18,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3505 backedges. 2793 proven. 0 refuted. 0 times theorem prover too weak. 712 trivial. 0 not checked. [2021-11-02 23:14:18,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:18,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060968065] [2021-11-02 23:14:18,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060968065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:14:18,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:14:18,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:14:18,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546958507] [2021-11-02 23:14:18,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:14:18,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:18,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:14:18,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:14:18,732 INFO L87 Difference]: Start difference. First operand 71539 states and 75125 transitions. Second operand has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:24,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:24,707 INFO L93 Difference]: Finished difference Result 156271 states and 163976 transitions. [2021-11-02 23:14:24,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:14:24,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 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 1451 [2021-11-02 23:14:24,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:24,782 INFO L225 Difference]: With dead ends: 156271 [2021-11-02 23:14:24,783 INFO L226 Difference]: Without dead ends: 85584 [2021-11-02 23:14:24,812 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:14:24,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85584 states. [2021-11-02 23:14:25,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85584 to 67276. [2021-11-02 23:14:25,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67276 states, 67275 states have (on average 1.0481010776662951) internal successors, (70511), 67275 states have internal predecessors, (70511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:25,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67276 states to 67276 states and 70511 transitions. [2021-11-02 23:14:25,913 INFO L78 Accepts]: Start accepts. Automaton has 67276 states and 70511 transitions. Word has length 1451 [2021-11-02 23:14:25,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:25,914 INFO L470 AbstractCegarLoop]: Abstraction has 67276 states and 70511 transitions. [2021-11-02 23:14:25,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:25,914 INFO L276 IsEmpty]: Start isEmpty. Operand 67276 states and 70511 transitions. [2021-11-02 23:14:25,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1476 [2021-11-02 23:14:25,980 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:25,981 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:25,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-02 23:14:25,981 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:25,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:25,982 INFO L85 PathProgramCache]: Analyzing trace with hash -2085985060, now seen corresponding path program 1 times [2021-11-02 23:14:25,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:25,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163451838] [2021-11-02 23:14:25,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:25,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:26,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2479 backedges. 1357 proven. 0 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2021-11-02 23:14:26,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:26,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163451838] [2021-11-02 23:14:26,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163451838] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:14:26,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:14:26,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:14:26,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202188376] [2021-11-02 23:14:26,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:14:26,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:26,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:14:26,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:14:26,791 INFO L87 Difference]: Start difference. First operand 67276 states and 70511 transitions. Second operand has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:30,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:30,856 INFO L93 Difference]: Finished difference Result 149472 states and 156465 transitions. [2021-11-02 23:14:30,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:14:30,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 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 1475 [2021-11-02 23:14:30,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:30,858 INFO L225 Difference]: With dead ends: 149472 [2021-11-02 23:14:30,858 INFO L226 Difference]: Without dead ends: 0 [2021-11-02 23:14:30,896 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:14:30,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-02 23:14:30,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-02 23:14:30,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:30,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-02 23:14:30,897 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1475 [2021-11-02 23:14:30,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:30,897 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-02 23:14:30,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:30,898 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-02 23:14:30,898 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-02 23:14:30,900 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-02 23:14:30,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-02 23:14:30,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-02 23:14:30,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-02 23:14:34,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-02 23:14:38,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-02 23:14:38,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms