./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label35.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_fc263546-7e08-4c05-a451-deeae891643c/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc263546-7e08-4c05-a451-deeae891643c/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_fc263546-7e08-4c05-a451-deeae891643c/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc263546-7e08-4c05-a451-deeae891643c/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label35.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc263546-7e08-4c05-a451-deeae891643c/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_fc263546-7e08-4c05-a451-deeae891643c/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 e81bbc4430f76a90c5e02a887d03761648c221c2fd9f1be76d3af26cf9b24c3e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:49:06,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:49:06,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:49:06,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:49:06,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:49:06,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:49:06,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:49:06,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:49:06,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:49:06,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:49:06,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:49:06,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:49:06,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:49:06,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:49:06,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:49:06,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:49:06,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:49:06,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:49:06,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:49:06,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:49:06,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:49:06,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:49:06,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:49:06,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:49:06,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:49:06,544 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:49:06,545 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:49:06,546 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:49:06,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:49:06,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:49:06,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:49:06,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:49:06,551 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:49:06,552 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:49:06,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:49:06,553 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:49:06,554 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:49:06,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:49:06,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:49:06,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:49:06,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:49:06,558 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc263546-7e08-4c05-a451-deeae891643c/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:49:06,581 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:49:06,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:49:06,581 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:49:06,582 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:49:06,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:49:06,583 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:49:06,583 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:49:06,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:49:06,584 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:49:06,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:49:06,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:49:06,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:49:06,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:49:06,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:49:06,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:49:06,585 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:49:06,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:49:06,586 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:49:06,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:49:06,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:49:06,586 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:49:06,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:49:06,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:49:06,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:49:06,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:49:06,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:49:06,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:49:06,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:49:06,588 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:49:06,589 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:49:06,589 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:49:06,589 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:49:06,589 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_fc263546-7e08-4c05-a451-deeae891643c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc263546-7e08-4c05-a451-deeae891643c/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e81bbc4430f76a90c5e02a887d03761648c221c2fd9f1be76d3af26cf9b24c3e [2021-11-02 22:49:06,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:49:06,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:49:06,851 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:49:06,852 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:49:06,853 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:49:06,853 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc263546-7e08-4c05-a451-deeae891643c/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/eca-rers2012/Problem17_label35.c [2021-11-02 22:49:06,957 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc263546-7e08-4c05-a451-deeae891643c/bin/uautomizer-tBqnrhUYjU/data/7465e43ae/a76c296865ab4d8d8ddbc1315a133b28/FLAG46cb3ac8c [2021-11-02 22:49:07,663 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:49:07,664 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc263546-7e08-4c05-a451-deeae891643c/sv-benchmarks/c/eca-rers2012/Problem17_label35.c [2021-11-02 22:49:07,692 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc263546-7e08-4c05-a451-deeae891643c/bin/uautomizer-tBqnrhUYjU/data/7465e43ae/a76c296865ab4d8d8ddbc1315a133b28/FLAG46cb3ac8c [2021-11-02 22:49:07,793 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc263546-7e08-4c05-a451-deeae891643c/bin/uautomizer-tBqnrhUYjU/data/7465e43ae/a76c296865ab4d8d8ddbc1315a133b28 [2021-11-02 22:49:07,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:49:07,797 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:49:07,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:49:07,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:49:07,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:49:07,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:49:07" (1/1) ... [2021-11-02 22:49:07,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@334bd15f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:07, skipping insertion in model container [2021-11-02 22:49:07,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:49:07" (1/1) ... [2021-11-02 22:49:07,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:49:07,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:49:08,131 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_fc263546-7e08-4c05-a451-deeae891643c/sv-benchmarks/c/eca-rers2012/Problem17_label35.c[1267,1280] [2021-11-02 22:49:08,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:49:08,885 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:49:08,899 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_fc263546-7e08-4c05-a451-deeae891643c/sv-benchmarks/c/eca-rers2012/Problem17_label35.c[1267,1280] [2021-11-02 22:49:09,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:49:09,415 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:49:09,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:09 WrapperNode [2021-11-02 22:49:09,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:49:09,418 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:49:09,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:49:09,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:49:09,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:09" (1/1) ... [2021-11-02 22:49:09,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:09" (1/1) ... [2021-11-02 22:49:09,837 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:49:09,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:49:09,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:49:09,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:49:09,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:09" (1/1) ... [2021-11-02 22:49:09,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:09" (1/1) ... [2021-11-02 22:49:09,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:09" (1/1) ... [2021-11-02 22:49:09,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:09" (1/1) ... [2021-11-02 22:49:10,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:09" (1/1) ... [2021-11-02 22:49:10,148 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:09" (1/1) ... [2021-11-02 22:49:10,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:09" (1/1) ... [2021-11-02 22:49:10,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:49:10,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:49:10,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:49:10,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:49:10,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:09" (1/1) ... [2021-11-02 22:49:10,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:49:10,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc263546-7e08-4c05-a451-deeae891643c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:49:10,292 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc263546-7e08-4c05-a451-deeae891643c/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:49:10,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc263546-7e08-4c05-a451-deeae891643c/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:49:10,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:49:10,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:49:10,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:49:10,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:49:14,426 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:49:14,427 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-02 22:49:14,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:49:14 BoogieIcfgContainer [2021-11-02 22:49:14,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:49:14,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:49:14,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:49:14,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:49:14,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:49:07" (1/3) ... [2021-11-02 22:49:14,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8de3d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:49:14, skipping insertion in model container [2021-11-02 22:49:14,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:49:09" (2/3) ... [2021-11-02 22:49:14,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8de3d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:49:14, skipping insertion in model container [2021-11-02 22:49:14,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:49:14" (3/3) ... [2021-11-02 22:49:14,438 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label35.c [2021-11-02 22:49:14,443 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:49:14,444 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:49:14,493 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:49:14,500 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 22:49:14,500 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:49:14,529 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 22:49:14,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-02 22:49:14,533 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:14,534 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:14,534 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:14,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:14,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1810726993, now seen corresponding path program 1 times [2021-11-02 22:49:14,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:14,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276550489] [2021-11-02 22:49:14,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:14,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:14,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:14,706 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 22:49:14,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:14,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276550489] [2021-11-02 22:49:14,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276550489] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:14,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:14,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:49:14,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646317685] [2021-11-02 22:49:14,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:49:14,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:14,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:49:14,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:49:14,733 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 22:49:17,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:17,922 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2021-11-02 22:49:17,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:49:17,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-02 22:49:17,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:17,945 INFO L225 Difference]: With dead ends: 1644 [2021-11-02 22:49:17,945 INFO L226 Difference]: Without dead ends: 977 [2021-11-02 22:49:17,950 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 22:49:17,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-11-02 22:49:18,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2021-11-02 22:49:18,048 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 22:49:18,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2021-11-02 22:49:18,054 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 7 [2021-11-02 22:49:18,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:18,055 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2021-11-02 22:49:18,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 22:49:18,056 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2021-11-02 22:49:18,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-02 22:49:18,059 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:18,059 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:49:18,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:49:18,060 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:18,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:18,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1811797306, now seen corresponding path program 1 times [2021-11-02 22:49:18,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:18,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250717684] [2021-11-02 22:49:18,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:18,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:18,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:18,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:18,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250717684] [2021-11-02 22:49:18,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250717684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:18,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:18,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:49:18,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473617607] [2021-11-02 22:49:18,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:49:18,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:18,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:49:18,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:49:18,287 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:21,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:21,237 INFO L93 Difference]: Finished difference Result 2813 states and 4381 transitions. [2021-11-02 22:49:21,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:49:21,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-02 22:49:21,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:21,250 INFO L225 Difference]: With dead ends: 2813 [2021-11-02 22:49:21,250 INFO L226 Difference]: Without dead ends: 1844 [2021-11-02 22:49:21,252 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 22:49:21,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-11-02 22:49:21,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1841. [2021-11-02 22:49:21,319 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 22:49:21,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2484 transitions. [2021-11-02 22:49:21,328 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2484 transitions. Word has length 74 [2021-11-02 22:49:21,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:21,329 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 2484 transitions. [2021-11-02 22:49:21,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:21,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2484 transitions. [2021-11-02 22:49:21,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 22:49:21,334 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:21,335 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:49:21,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:49:21,336 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:21,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:21,338 INFO L85 PathProgramCache]: Analyzing trace with hash 261240196, now seen corresponding path program 1 times [2021-11-02 22:49:21,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:21,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393159550] [2021-11-02 22:49:21,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:21,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:21,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:21,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393159550] [2021-11-02 22:49:21,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393159550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:21,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:21,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:49:21,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856828769] [2021-11-02 22:49:21,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:49:21,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:21,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:49:21,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:49:21,530 INFO L87 Difference]: Start difference. First operand 1841 states and 2484 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:24,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:24,251 INFO L93 Difference]: Finished difference Result 4552 states and 6282 transitions. [2021-11-02 22:49:24,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:49:24,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-02 22:49:24,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:24,268 INFO L225 Difference]: With dead ends: 4552 [2021-11-02 22:49:24,268 INFO L226 Difference]: Without dead ends: 2713 [2021-11-02 22:49:24,271 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 22:49:24,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-11-02 22:49:24,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2021-11-02 22:49:24,331 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 22:49:24,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3524 transitions. [2021-11-02 22:49:24,339 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3524 transitions. Word has length 77 [2021-11-02 22:49:24,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:24,342 INFO L470 AbstractCegarLoop]: Abstraction has 2711 states and 3524 transitions. [2021-11-02 22:49:24,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:24,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3524 transitions. [2021-11-02 22:49:24,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-02 22:49:24,355 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:24,356 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:24,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:49:24,356 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:24,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:24,359 INFO L85 PathProgramCache]: Analyzing trace with hash -154130228, now seen corresponding path program 1 times [2021-11-02 22:49:24,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:24,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643417901] [2021-11-02 22:49:24,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:24,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-02 22:49:24,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:24,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643417901] [2021-11-02 22:49:24,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643417901] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:24,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:24,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:49:24,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908873172] [2021-11-02 22:49:24,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:49:24,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:24,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:49:24,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:49:24,560 INFO L87 Difference]: Start difference. First operand 2711 states and 3524 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 22:49:26,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:26,939 INFO L93 Difference]: Finished difference Result 7984 states and 10361 transitions. [2021-11-02 22:49:26,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:49:26,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 0 states have call successors, (0), 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 146 [2021-11-02 22:49:26,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:26,964 INFO L225 Difference]: With dead ends: 7984 [2021-11-02 22:49:26,964 INFO L226 Difference]: Without dead ends: 4421 [2021-11-02 22:49:26,969 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 22:49:26,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2021-11-02 22:49:27,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 3571. [2021-11-02 22:49:27,046 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 22:49:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 4204 transitions. [2021-11-02 22:49:27,056 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 4204 transitions. Word has length 146 [2021-11-02 22:49:27,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:27,057 INFO L470 AbstractCegarLoop]: Abstraction has 3571 states and 4204 transitions. [2021-11-02 22:49:27,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 22:49:27,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 4204 transitions. [2021-11-02 22:49:27,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-02 22:49:27,063 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:27,063 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:27,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:49:27,064 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:27,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:27,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1380063534, now seen corresponding path program 1 times [2021-11-02 22:49:27,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:27,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098546753] [2021-11-02 22:49:27,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:27,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:27,246 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:27,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:27,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098546753] [2021-11-02 22:49:27,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098546753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:27,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:27,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:49:27,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287487301] [2021-11-02 22:49:27,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:49:27,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:27,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:49:27,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:49:27,250 INFO L87 Difference]: Start difference. First operand 3571 states and 4204 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:29,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:29,136 INFO L93 Difference]: Finished difference Result 9273 states and 11087 transitions. [2021-11-02 22:49:29,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:49:29,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-11-02 22:49:29,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:29,164 INFO L225 Difference]: With dead ends: 9273 [2021-11-02 22:49:29,165 INFO L226 Difference]: Without dead ends: 5704 [2021-11-02 22:49:29,169 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 22:49:29,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5704 states. [2021-11-02 22:49:29,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5704 to 5704. [2021-11-02 22:49:29,279 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 22:49:29,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 6613 transitions. [2021-11-02 22:49:29,292 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 6613 transitions. Word has length 159 [2021-11-02 22:49:29,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:29,293 INFO L470 AbstractCegarLoop]: Abstraction has 5704 states and 6613 transitions. [2021-11-02 22:49:29,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:29,294 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 6613 transitions. [2021-11-02 22:49:29,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-02 22:49:29,296 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:29,296 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:29,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:49:29,296 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:29,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:29,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1627235923, now seen corresponding path program 1 times [2021-11-02 22:49:29,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:29,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192398849] [2021-11-02 22:49:29,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:29,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 22:49:29,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:29,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192398849] [2021-11-02 22:49:29,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192398849] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:29,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:29,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:49:29,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229205707] [2021-11-02 22:49:29,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:49:29,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:29,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:49:29,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:49:29,384 INFO L87 Difference]: Start difference. First operand 5704 states and 6613 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 22:49:31,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:31,466 INFO L93 Difference]: Finished difference Result 14376 states and 16776 transitions. [2021-11-02 22:49:31,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:49:31,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-11-02 22:49:31,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:31,508 INFO L225 Difference]: With dead ends: 14376 [2021-11-02 22:49:31,508 INFO L226 Difference]: Without dead ends: 8673 [2021-11-02 22:49:31,516 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 22:49:31,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8673 states. [2021-11-02 22:49:31,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8673 to 5677. [2021-11-02 22:49:31,764 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 22:49:31,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5677 states to 5677 states and 6572 transitions. [2021-11-02 22:49:31,787 INFO L78 Accepts]: Start accepts. Automaton has 5677 states and 6572 transitions. Word has length 161 [2021-11-02 22:49:31,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:31,787 INFO L470 AbstractCegarLoop]: Abstraction has 5677 states and 6572 transitions. [2021-11-02 22:49:31,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 22:49:31,788 INFO L276 IsEmpty]: Start isEmpty. Operand 5677 states and 6572 transitions. [2021-11-02 22:49:31,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-02 22:49:31,792 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:31,793 INFO L513 BasicCegarLoop]: trace histogram [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, 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 22:49:31,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:49:31,793 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:31,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:31,794 INFO L85 PathProgramCache]: Analyzing trace with hash 38679633, now seen corresponding path program 1 times [2021-11-02 22:49:31,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:31,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250548852] [2021-11-02 22:49:31,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:31,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-02 22:49:32,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:32,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250548852] [2021-11-02 22:49:32,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250548852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:32,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:32,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:49:32,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808528790] [2021-11-02 22:49:32,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:49:32,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:32,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:49:32,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:49:32,010 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 22:49:34,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:34,265 INFO L93 Difference]: Finished difference Result 14315 states and 16680 transitions. [2021-11-02 22:49:34,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:49:34,266 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 239 [2021-11-02 22:49:34,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:34,319 INFO L225 Difference]: With dead ends: 14315 [2021-11-02 22:49:34,326 INFO L226 Difference]: Without dead ends: 7790 [2021-11-02 22:49:34,333 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 22:49:34,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2021-11-02 22:49:34,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 7790. [2021-11-02 22:49:34,517 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 22:49:34,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7790 states to 7790 states and 8713 transitions. [2021-11-02 22:49:34,540 INFO L78 Accepts]: Start accepts. Automaton has 7790 states and 8713 transitions. Word has length 239 [2021-11-02 22:49:34,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:34,540 INFO L470 AbstractCegarLoop]: Abstraction has 7790 states and 8713 transitions. [2021-11-02 22:49:34,541 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 22:49:34,541 INFO L276 IsEmpty]: Start isEmpty. Operand 7790 states and 8713 transitions. [2021-11-02 22:49:34,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-02 22:49:34,547 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:34,548 INFO L513 BasicCegarLoop]: trace histogram [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, 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 22:49:34,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:49:34,548 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:34,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:34,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1486251948, now seen corresponding path program 1 times [2021-11-02 22:49:34,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:34,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461399917] [2021-11-02 22:49:34,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:34,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-02 22:49:34,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:34,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461399917] [2021-11-02 22:49:34,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461399917] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:34,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:34,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:49:34,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353905564] [2021-11-02 22:49:34,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:49:34,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:34,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:49:34,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:49:34,717 INFO L87 Difference]: Start difference. First operand 7790 states and 8713 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:36,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:36,885 INFO L93 Difference]: Finished difference Result 18559 states and 20913 transitions. [2021-11-02 22:49:36,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:49:36,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 279 [2021-11-02 22:49:36,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:36,909 INFO L225 Difference]: With dead ends: 18559 [2021-11-02 22:49:36,909 INFO L226 Difference]: Without dead ends: 10771 [2021-11-02 22:49:36,916 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 22:49:36,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10771 states. [2021-11-02 22:49:37,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10771 to 9916. [2021-11-02 22:49:37,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9916 states, 9915 states have (on average 1.119415027735754) internal successors, (11099), 9915 states have internal predecessors, (11099), 0 states have call successors, (0), 0 states 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 22:49:37,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9916 states to 9916 states and 11099 transitions. [2021-11-02 22:49:37,064 INFO L78 Accepts]: Start accepts. Automaton has 9916 states and 11099 transitions. Word has length 279 [2021-11-02 22:49:37,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:37,065 INFO L470 AbstractCegarLoop]: Abstraction has 9916 states and 11099 transitions. [2021-11-02 22:49:37,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:37,065 INFO L276 IsEmpty]: Start isEmpty. Operand 9916 states and 11099 transitions. [2021-11-02 22:49:37,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-11-02 22:49:37,074 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:37,075 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:49:37,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:49:37,076 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:37,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:37,078 INFO L85 PathProgramCache]: Analyzing trace with hash 51725020, now seen corresponding path program 1 times [2021-11-02 22:49:37,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:37,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580864058] [2021-11-02 22:49:37,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:37,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:37,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:37,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580864058] [2021-11-02 22:49:37,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580864058] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:37,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:37,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:49:37,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253479585] [2021-11-02 22:49:37,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:49:37,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:37,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:49:37,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:49:37,415 INFO L87 Difference]: Start difference. First operand 9916 states and 11099 transitions. Second operand has 4 states, 4 states have (on average 86.5) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states 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 22:49:40,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:40,323 INFO L93 Difference]: Finished difference Result 26239 states and 29414 transitions. [2021-11-02 22:49:40,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:49:40,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 86.5) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 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 346 [2021-11-02 22:49:40,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:40,350 INFO L225 Difference]: With dead ends: 26239 [2021-11-02 22:49:40,350 INFO L226 Difference]: Without dead ends: 15900 [2021-11-02 22:49:40,359 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 22:49:40,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15900 states. [2021-11-02 22:49:40,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15900 to 15898. [2021-11-02 22:49:40,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15898 states, 15897 states have (on average 1.1247405170786942) internal successors, (17880), 15897 states have internal predecessors, (17880), 0 states have call successors, (0), 0 states 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 22:49:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15898 states to 15898 states and 17880 transitions. [2021-11-02 22:49:40,648 INFO L78 Accepts]: Start accepts. Automaton has 15898 states and 17880 transitions. Word has length 346 [2021-11-02 22:49:40,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:40,649 INFO L470 AbstractCegarLoop]: Abstraction has 15898 states and 17880 transitions. [2021-11-02 22:49:40,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.5) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states 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 22:49:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 15898 states and 17880 transitions. [2021-11-02 22:49:40,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2021-11-02 22:49:40,658 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:40,658 INFO L513 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-02 22:49:40,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:49:40,659 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:40,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:40,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1639380243, now seen corresponding path program 1 times [2021-11-02 22:49:40,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:40,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578318314] [2021-11-02 22:49:40,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:40,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 218 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-02 22:49:40,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:40,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578318314] [2021-11-02 22:49:40,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578318314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:40,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:40,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:49:40,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180083836] [2021-11-02 22:49:40,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:49:40,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:40,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:49:40,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:49:40,796 INFO L87 Difference]: Start difference. First operand 15898 states and 17880 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states 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 22:49:43,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:43,215 INFO L93 Difference]: Finished difference Result 44148 states and 49784 transitions. [2021-11-02 22:49:43,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:49:43,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 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 380 [2021-11-02 22:49:43,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:43,268 INFO L225 Difference]: With dead ends: 44148 [2021-11-02 22:49:43,268 INFO L226 Difference]: Without dead ends: 28252 [2021-11-02 22:49:43,281 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 22:49:43,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28252 states. [2021-11-02 22:49:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28252 to 27809. [2021-11-02 22:49:43,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27809 states, 27808 states have (on average 1.1171605293440736) internal successors, (31066), 27808 states have internal predecessors, (31066), 0 states have call successors, (0), 0 states 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 22:49:43,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27809 states to 27809 states and 31066 transitions. [2021-11-02 22:49:43,889 INFO L78 Accepts]: Start accepts. Automaton has 27809 states and 31066 transitions. Word has length 380 [2021-11-02 22:49:43,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:43,890 INFO L470 AbstractCegarLoop]: Abstraction has 27809 states and 31066 transitions. [2021-11-02 22:49:43,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states 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 22:49:43,890 INFO L276 IsEmpty]: Start isEmpty. Operand 27809 states and 31066 transitions. [2021-11-02 22:49:43,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2021-11-02 22:49:43,901 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:43,902 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:49:43,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:49:43,902 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:43,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:43,903 INFO L85 PathProgramCache]: Analyzing trace with hash -943800774, now seen corresponding path program 1 times [2021-11-02 22:49:43,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:43,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633231135] [2021-11-02 22:49:43,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:43,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-02 22:49:44,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:44,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633231135] [2021-11-02 22:49:44,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633231135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:44,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:44,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:49:44,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212241312] [2021-11-02 22:49:44,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:49:44,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:44,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:49:44,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:49:44,220 INFO L87 Difference]: Start difference. First operand 27809 states and 31066 transitions. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states 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 22:49:46,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:46,319 INFO L93 Difference]: Finished difference Result 62014 states and 69501 transitions. [2021-11-02 22:49:46,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:49:46,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 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 393 [2021-11-02 22:49:46,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:46,348 INFO L225 Difference]: With dead ends: 62014 [2021-11-02 22:49:46,348 INFO L226 Difference]: Without dead ends: 32502 [2021-11-02 22:49:46,363 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 22:49:46,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32502 states. [2021-11-02 22:49:46,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32502 to 32496. [2021-11-02 22:49:46,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32496 states, 32495 states have (on average 1.1129404523772888) internal successors, (36165), 32495 states have internal predecessors, (36165), 0 states have call successors, (0), 0 states 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 22:49:46,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32496 states to 32496 states and 36165 transitions. [2021-11-02 22:49:46,937 INFO L78 Accepts]: Start accepts. Automaton has 32496 states and 36165 transitions. Word has length 393 [2021-11-02 22:49:46,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:46,938 INFO L470 AbstractCegarLoop]: Abstraction has 32496 states and 36165 transitions. [2021-11-02 22:49:46,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states 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 22:49:46,939 INFO L276 IsEmpty]: Start isEmpty. Operand 32496 states and 36165 transitions. [2021-11-02 22:49:46,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-11-02 22:49:46,955 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:46,955 INFO L513 BasicCegarLoop]: trace histogram [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, 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] [2021-11-02 22:49:46,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:49:46,956 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:46,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:46,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1163369355, now seen corresponding path program 1 times [2021-11-02 22:49:46,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:46,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185130527] [2021-11-02 22:49:46,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:46,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:47,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-02 22:49:47,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:47,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185130527] [2021-11-02 22:49:47,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185130527] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:47,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:47,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:49:47,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777060154] [2021-11-02 22:49:47,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:49:47,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:47,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:49:47,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:49:47,194 INFO L87 Difference]: Start difference. First operand 32496 states and 36165 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states 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 22:49:49,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:49,548 INFO L93 Difference]: Finished difference Result 77801 states and 86693 transitions. [2021-11-02 22:49:49,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:49:49,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 442 [2021-11-02 22:49:49,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:49,590 INFO L225 Difference]: With dead ends: 77801 [2021-11-02 22:49:49,590 INFO L226 Difference]: Without dead ends: 45307 [2021-11-02 22:49:49,610 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 22:49:49,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45307 states. [2021-11-02 22:49:50,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45307 to 43580. [2021-11-02 22:49:50,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43580 states, 43579 states have (on average 1.1083319947681223) internal successors, (48300), 43579 states have internal predecessors, (48300), 0 states have call successors, (0), 0 states 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 22:49:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43580 states to 43580 states and 48300 transitions. [2021-11-02 22:49:50,448 INFO L78 Accepts]: Start accepts. Automaton has 43580 states and 48300 transitions. Word has length 442 [2021-11-02 22:49:50,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:50,451 INFO L470 AbstractCegarLoop]: Abstraction has 43580 states and 48300 transitions. [2021-11-02 22:49:50,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states 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 22:49:50,452 INFO L276 IsEmpty]: Start isEmpty. Operand 43580 states and 48300 transitions. [2021-11-02 22:49:50,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2021-11-02 22:49:50,469 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:50,470 INFO L513 BasicCegarLoop]: trace histogram [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, 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] [2021-11-02 22:49:50,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:49:50,471 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:50,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:50,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1197302081, now seen corresponding path program 1 times [2021-11-02 22:49:50,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:50,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998209205] [2021-11-02 22:49:50,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:50,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:50,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:50,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998209205] [2021-11-02 22:49:50,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998209205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:50,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:50,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:49:50,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256893540] [2021-11-02 22:49:50,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:49:50,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:50,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:49:50,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:49:50,728 INFO L87 Difference]: Start difference. First operand 43580 states and 48300 transitions. Second operand has 4 states, 4 states have (on average 112.5) internal successors, (450), 4 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 22:49:54,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:54,030 INFO L93 Difference]: Finished difference Result 107192 states and 118516 transitions. [2021-11-02 22:49:54,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:49:54,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 112.5) internal successors, (450), 4 states have internal predecessors, (450), 0 states have call successors, (0), 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 450 [2021-11-02 22:49:54,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:54,100 INFO L225 Difference]: With dead ends: 107192 [2021-11-02 22:49:54,100 INFO L226 Difference]: Without dead ends: 63614 [2021-11-02 22:49:54,122 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 22:49:54,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63614 states. [2021-11-02 22:49:55,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63614 to 58071. [2021-11-02 22:49:55,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58071 states, 58070 states have (on average 1.1068882383330463) internal successors, (64277), 58070 states have internal predecessors, (64277), 0 states have call successors, (0), 0 states 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 22:49:55,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58071 states to 58071 states and 64277 transitions. [2021-11-02 22:49:55,141 INFO L78 Accepts]: Start accepts. Automaton has 58071 states and 64277 transitions. Word has length 450 [2021-11-02 22:49:55,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:55,142 INFO L470 AbstractCegarLoop]: Abstraction has 58071 states and 64277 transitions. [2021-11-02 22:49:55,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.5) internal successors, (450), 4 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 22:49:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 58071 states and 64277 transitions. [2021-11-02 22:49:55,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-11-02 22:49:55,159 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:55,159 INFO L513 BasicCegarLoop]: trace histogram [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, 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] [2021-11-02 22:49:55,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:49:55,160 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:55,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:55,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1579239472, now seen corresponding path program 1 times [2021-11-02 22:49:55,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:55,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880017396] [2021-11-02 22:49:55,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:55,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:55,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-11-02 22:49:55,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:55,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880017396] [2021-11-02 22:49:55,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880017396] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:55,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:55,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:49:55,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675238414] [2021-11-02 22:49:55,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:49:55,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:55,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:49:55,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:49:55,359 INFO L87 Difference]: Start difference. First operand 58071 states and 64277 transitions. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 22:49:57,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:57,599 INFO L93 Difference]: Finished difference Result 116129 states and 128541 transitions. [2021-11-02 22:49:57,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:49:57,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 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 474 [2021-11-02 22:49:57,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:57,656 INFO L225 Difference]: With dead ends: 116129 [2021-11-02 22:49:57,656 INFO L226 Difference]: Without dead ends: 58060 [2021-11-02 22:49:57,676 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 22:49:57,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58060 states. [2021-11-02 22:49:58,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58060 to 57208. [2021-11-02 22:49:58,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57208 states, 57207 states have (on average 1.0848672365269985) internal successors, (62062), 57207 states have internal predecessors, (62062), 0 states have call successors, (0), 0 states 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 22:49:58,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57208 states to 57208 states and 62062 transitions. [2021-11-02 22:49:58,336 INFO L78 Accepts]: Start accepts. Automaton has 57208 states and 62062 transitions. Word has length 474 [2021-11-02 22:49:58,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:58,337 INFO L470 AbstractCegarLoop]: Abstraction has 57208 states and 62062 transitions. [2021-11-02 22:49:58,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 22:49:58,337 INFO L276 IsEmpty]: Start isEmpty. Operand 57208 states and 62062 transitions. [2021-11-02 22:49:58,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2021-11-02 22:49:58,349 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:58,349 INFO L513 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-02 22:49:58,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:49:58,350 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:58,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:58,350 INFO L85 PathProgramCache]: Analyzing trace with hash 158148101, now seen corresponding path program 1 times [2021-11-02 22:49:58,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:58,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621513744] [2021-11-02 22:49:58,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:58,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-02 22:49:58,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:58,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621513744] [2021-11-02 22:49:58,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621513744] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:58,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:58,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:49:58,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384179655] [2021-11-02 22:49:58,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:49:58,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:58,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:49:58,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:49:58,589 INFO L87 Difference]: Start difference. First operand 57208 states and 62062 transitions. Second operand has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states 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 22:50:00,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:00,808 INFO L93 Difference]: Finished difference Result 118263 states and 128437 transitions. [2021-11-02 22:50:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:50:00,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 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 493 [2021-11-02 22:50:00,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:00,866 INFO L225 Difference]: With dead ends: 118263 [2021-11-02 22:50:00,866 INFO L226 Difference]: Without dead ends: 60202 [2021-11-02 22:50:00,890 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 22:50:00,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60202 states. [2021-11-02 22:50:01,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60202 to 57209. [2021-11-02 22:50:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57209 states, 57208 states have (on average 1.0847259124597959) internal successors, (62055), 57208 states have internal predecessors, (62055), 0 states have call successors, (0), 0 states 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 22:50:01,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57209 states to 57209 states and 62055 transitions. [2021-11-02 22:50:01,696 INFO L78 Accepts]: Start accepts. Automaton has 57209 states and 62055 transitions. Word has length 493 [2021-11-02 22:50:01,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:01,696 INFO L470 AbstractCegarLoop]: Abstraction has 57209 states and 62055 transitions. [2021-11-02 22:50:01,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states 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 22:50:01,697 INFO L276 IsEmpty]: Start isEmpty. Operand 57209 states and 62055 transitions. [2021-11-02 22:50:01,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-11-02 22:50:01,709 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:01,710 INFO L513 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-02 22:50:01,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:50:01,710 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:50:01,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:01,711 INFO L85 PathProgramCache]: Analyzing trace with hash -830201229, now seen corresponding path program 1 times [2021-11-02 22:50:01,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:01,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905429501] [2021-11-02 22:50:01,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:01,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 250 proven. 82 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:50:01,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:01,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905429501] [2021-11-02 22:50:01,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905429501] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:01,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214051867] [2021-11-02 22:50:01,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:01,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:01,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc263546-7e08-4c05-a451-deeae891643c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:50:01,909 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc263546-7e08-4c05-a451-deeae891643c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:50:01,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc263546-7e08-4c05-a451-deeae891643c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:50:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:02,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:50:02,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:50:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 250 proven. 82 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:50:04,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214051867] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:04,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:50:04,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-11-02 22:50:04,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283316934] [2021-11-02 22:50:04,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:50:04,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:04,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:50:04,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:50:04,409 INFO L87 Difference]: Start difference. First operand 57209 states and 62055 transitions. Second operand has 4 states, 4 states have (on average 125.5) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states 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 22:50:07,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:07,425 INFO L93 Difference]: Finished difference Result 116122 states and 125912 transitions. [2021-11-02 22:50:07,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:50:07,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 125.5) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 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 506 [2021-11-02 22:50:07,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:07,473 INFO L225 Difference]: With dead ends: 116122 [2021-11-02 22:50:07,473 INFO L226 Difference]: Without dead ends: 58915 [2021-11-02 22:50:07,493 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 504 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:50:07,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58915 states. [2021-11-02 22:50:08,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58915 to 58484. [2021-11-02 22:50:08,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58484 states, 58483 states have (on average 1.0838192295196896) internal successors, (63385), 58483 states have internal predecessors, (63385), 0 states have call successors, (0), 0 states 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 22:50:08,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58484 states to 58484 states and 63385 transitions. [2021-11-02 22:50:08,297 INFO L78 Accepts]: Start accepts. Automaton has 58484 states and 63385 transitions. Word has length 506 [2021-11-02 22:50:08,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:08,297 INFO L470 AbstractCegarLoop]: Abstraction has 58484 states and 63385 transitions. [2021-11-02 22:50:08,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.5) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states 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 22:50:08,298 INFO L276 IsEmpty]: Start isEmpty. Operand 58484 states and 63385 transitions. [2021-11-02 22:50:08,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2021-11-02 22:50:08,314 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:08,315 INFO L513 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-02 22:50:08,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc263546-7e08-4c05-a451-deeae891643c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:50:08,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc263546-7e08-4c05-a451-deeae891643c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 22:50:08,528 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:50:08,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:08,529 INFO L85 PathProgramCache]: Analyzing trace with hash 734099224, now seen corresponding path program 1 times [2021-11-02 22:50:08,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:08,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597320835] [2021-11-02 22:50:08,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:08,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 277 proven. 82 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:50:08,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:08,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597320835] [2021-11-02 22:50:08,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597320835] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:08,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179829270] [2021-11-02 22:50:08,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:08,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:08,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc263546-7e08-4c05-a451-deeae891643c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:50:08,788 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc263546-7e08-4c05-a451-deeae891643c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:50:08,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc263546-7e08-4c05-a451-deeae891643c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:50:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:09,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:50:09,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:50:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 200 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:50:11,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179829270] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:11,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:50:11,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-11-02 22:50:11,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850717585] [2021-11-02 22:50:11,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:50:11,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:11,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:50:11,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:50:11,147 INFO L87 Difference]: Start difference. First operand 58484 states and 63385 transitions. Second operand has 5 states, 5 states have (on average 156.6) internal successors, (783), 4 states have internal predecessors, (783), 0 states have call successors, (0), 0 states 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 22:50:14,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:14,463 INFO L93 Difference]: Finished difference Result 124627 states and 134754 transitions. [2021-11-02 22:50:14,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:50:14,464 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 156.6) internal successors, (783), 4 states have internal predecessors, (783), 0 states have call successors, (0), 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 531 [2021-11-02 22:50:14,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:14,510 INFO L225 Difference]: With dead ends: 124627 [2021-11-02 22:50:14,510 INFO L226 Difference]: Without dead ends: 66570 [2021-11-02 22:50:14,520 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 528 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:50:14,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66570 states. [2021-11-02 22:50:14,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66570 to 58059. [2021-11-02 22:50:15,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58059 states, 58058 states have (on average 1.0839677563815495) internal successors, (62933), 58058 states have internal predecessors, (62933), 0 states have call successors, (0), 0 states 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 22:50:15,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58059 states to 58059 states and 62933 transitions. [2021-11-02 22:50:15,376 INFO L78 Accepts]: Start accepts. Automaton has 58059 states and 62933 transitions. Word has length 531 [2021-11-02 22:50:15,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:15,376 INFO L470 AbstractCegarLoop]: Abstraction has 58059 states and 62933 transitions. [2021-11-02 22:50:15,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.6) internal successors, (783), 4 states have internal predecessors, (783), 0 states have call successors, (0), 0 states 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 22:50:15,377 INFO L276 IsEmpty]: Start isEmpty. Operand 58059 states and 62933 transitions. [2021-11-02 22:50:15,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2021-11-02 22:50:15,408 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:15,408 INFO L513 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:50:15,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc263546-7e08-4c05-a451-deeae891643c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-02 22:50:15,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc263546-7e08-4c05-a451-deeae891643c/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 22:50:15,628 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:50:15,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:15,629 INFO L85 PathProgramCache]: Analyzing trace with hash 519830086, now seen corresponding path program 1 times [2021-11-02 22:50:15,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:15,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019090888] [2021-11-02 22:50:15,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:15,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 324 proven. 0 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2021-11-02 22:50:15,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:15,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019090888] [2021-11-02 22:50:15,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019090888] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:50:15,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:50:15,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:50:15,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210846271] [2021-11-02 22:50:15,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:50:15,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:15,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:50:15,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:50:15,842 INFO L87 Difference]: Start difference. First operand 58059 states and 62933 transitions. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states 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 22:50:17,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:17,862 INFO L93 Difference]: Finished difference Result 121650 states and 131954 transitions. [2021-11-02 22:50:17,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:50:17,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 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 593 [2021-11-02 22:50:17,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:17,915 INFO L225 Difference]: With dead ends: 121650 [2021-11-02 22:50:17,915 INFO L226 Difference]: Without dead ends: 62740 [2021-11-02 22:50:17,939 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 22:50:17,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62740 states. [2021-11-02 22:50:18,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62740 to 59753. [2021-11-02 22:50:18,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59753 states, 59752 states have (on average 1.0743573436872407) internal successors, (64195), 59752 states have internal predecessors, (64195), 0 states have call successors, (0), 0 states 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 22:50:18,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59753 states to 59753 states and 64195 transitions. [2021-11-02 22:50:18,759 INFO L78 Accepts]: Start accepts. Automaton has 59753 states and 64195 transitions. Word has length 593 [2021-11-02 22:50:18,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:18,759 INFO L470 AbstractCegarLoop]: Abstraction has 59753 states and 64195 transitions. [2021-11-02 22:50:18,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states 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 22:50:18,760 INFO L276 IsEmpty]: Start isEmpty. Operand 59753 states and 64195 transitions. [2021-11-02 22:50:18,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2021-11-02 22:50:18,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:18,772 INFO L513 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:50:18,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 22:50:18,773 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:50:18,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:18,773 INFO L85 PathProgramCache]: Analyzing trace with hash 949947100, now seen corresponding path program 1 times [2021-11-02 22:50:18,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:18,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022030486] [2021-11-02 22:50:18,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:18,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:18,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 390 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-11-02 22:50:19,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:19,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022030486] [2021-11-02 22:50:19,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022030486] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:50:19,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:50:19,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:50:19,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032196250] [2021-11-02 22:50:19,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:50:19,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:19,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:50:19,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:50:19,416 INFO L87 Difference]: Start difference. First operand 59753 states and 64195 transitions. Second operand has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states 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 22:50:22,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:22,806 INFO L93 Difference]: Finished difference Result 136105 states and 146386 transitions. [2021-11-02 22:50:22,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:50:22,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 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 636 [2021-11-02 22:50:22,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:22,883 INFO L225 Difference]: With dead ends: 136105 [2021-11-02 22:50:22,883 INFO L226 Difference]: Without dead ends: 76779 [2021-11-02 22:50:22,909 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 22:50:22,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76779 states. [2021-11-02 22:50:23,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76779 to 68677. [2021-11-02 22:50:23,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68677 states, 68676 states have (on average 1.0727182713029297) internal successors, (73670), 68676 states have internal predecessors, (73670), 0 states have call successors, (0), 0 states 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 22:50:23,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68677 states to 68677 states and 73670 transitions. [2021-11-02 22:50:23,864 INFO L78 Accepts]: Start accepts. Automaton has 68677 states and 73670 transitions. Word has length 636 [2021-11-02 22:50:23,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:23,865 INFO L470 AbstractCegarLoop]: Abstraction has 68677 states and 73670 transitions. [2021-11-02 22:50:23,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states 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 22:50:23,865 INFO L276 IsEmpty]: Start isEmpty. Operand 68677 states and 73670 transitions. [2021-11-02 22:50:23,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2021-11-02 22:50:23,882 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:23,883 INFO L513 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-02 22:50:23,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 22:50:23,883 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:50:23,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:23,884 INFO L85 PathProgramCache]: Analyzing trace with hash 655979903, now seen corresponding path program 1 times [2021-11-02 22:50:23,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:23,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591960498] [2021-11-02 22:50:23,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:23,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 396 proven. 0 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2021-11-02 22:50:24,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:24,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591960498] [2021-11-02 22:50:24,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591960498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:50:24,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:50:24,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:50:24,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46344242] [2021-11-02 22:50:24,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:50:24,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:24,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:50:24,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:50:24,561 INFO L87 Difference]: Start difference. First operand 68677 states and 73670 transitions. Second operand has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states 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 22:50:27,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:27,478 INFO L93 Difference]: Finished difference Result 142054 states and 152281 transitions. [2021-11-02 22:50:27,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:50:27,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 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 642 [2021-11-02 22:50:27,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:27,535 INFO L225 Difference]: With dead ends: 142054 [2021-11-02 22:50:27,535 INFO L226 Difference]: Without dead ends: 73804 [2021-11-02 22:50:27,562 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 22:50:27,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73804 states. [2021-11-02 22:50:28,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73804 to 68677. [2021-11-02 22:50:28,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68677 states, 68676 states have (on average 1.072441609878269) internal successors, (73651), 68676 states have internal predecessors, (73651), 0 states have call successors, (0), 0 states 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 22:50:28,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68677 states to 68677 states and 73651 transitions. [2021-11-02 22:50:28,430 INFO L78 Accepts]: Start accepts. Automaton has 68677 states and 73651 transitions. Word has length 642 [2021-11-02 22:50:28,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:28,431 INFO L470 AbstractCegarLoop]: Abstraction has 68677 states and 73651 transitions. [2021-11-02 22:50:28,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states 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 22:50:28,431 INFO L276 IsEmpty]: Start isEmpty. Operand 68677 states and 73651 transitions. [2021-11-02 22:50:28,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2021-11-02 22:50:28,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:28,450 INFO L513 BasicCegarLoop]: trace histogram [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, 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] [2021-11-02 22:50:28,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 22:50:28,451 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:50:28,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:28,451 INFO L85 PathProgramCache]: Analyzing trace with hash -257727872, now seen corresponding path program 1 times [2021-11-02 22:50:28,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:28,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947467916] [2021-11-02 22:50:28,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:28,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:28,679 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 561 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-02 22:50:28,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:28,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947467916] [2021-11-02 22:50:28,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947467916] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:50:28,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:50:28,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:50:28,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050698478] [2021-11-02 22:50:28,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:50:28,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:28,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:50:28,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:50:29,016 INFO L87 Difference]: Start difference. First operand 68677 states and 73651 transitions. Second operand has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states 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 22:50:31,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:31,565 INFO L93 Difference]: Finished difference Result 147594 states and 158214 transitions. [2021-11-02 22:50:31,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:50:31,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 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 648 [2021-11-02 22:50:31,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:31,631 INFO L225 Difference]: With dead ends: 147594 [2021-11-02 22:50:31,631 INFO L226 Difference]: Without dead ends: 77629 [2021-11-02 22:50:31,662 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 22:50:31,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77629 states. [2021-11-02 22:50:32,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77629 to 74216. [2021-11-02 22:50:32,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74216 states, 74215 states have (on average 1.0662938759010983) internal successors, (79135), 74215 states have internal predecessors, (79135), 0 states have call successors, (0), 0 states 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 22:50:32,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74216 states to 74216 states and 79135 transitions. [2021-11-02 22:50:32,691 INFO L78 Accepts]: Start accepts. Automaton has 74216 states and 79135 transitions. Word has length 648 [2021-11-02 22:50:32,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:32,691 INFO L470 AbstractCegarLoop]: Abstraction has 74216 states and 79135 transitions. [2021-11-02 22:50:32,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states 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 22:50:32,691 INFO L276 IsEmpty]: Start isEmpty. Operand 74216 states and 79135 transitions. [2021-11-02 22:50:32,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 669 [2021-11-02 22:50:32,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:32,705 INFO L513 BasicCegarLoop]: trace histogram [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, 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, 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 22:50:32,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-02 22:50:32,705 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:50:32,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:32,705 INFO L85 PathProgramCache]: Analyzing trace with hash -642091459, now seen corresponding path program 1 times [2021-11-02 22:50:32,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:32,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726112420] [2021-11-02 22:50:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:32,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:33,071 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 664 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:50:33,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:33,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726112420] [2021-11-02 22:50:33,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726112420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:50:33,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:50:33,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:50:33,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736068682] [2021-11-02 22:50:33,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:50:33,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:33,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:50:33,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:50:33,074 INFO L87 Difference]: Start difference. First operand 74216 states and 79135 transitions. Second operand has 6 states, 6 states have (on average 110.66666666666667) internal successors, (664), 5 states have internal predecessors, (664), 0 states have call successors, (0), 0 states 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 22:50:36,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:36,964 INFO L93 Difference]: Finished difference Result 144900 states and 154460 transitions. [2021-11-02 22:50:36,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:50:36,966 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 110.66666666666667) internal successors, (664), 5 states have internal predecessors, (664), 0 states have call successors, (0), 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 668 [2021-11-02 22:50:36,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:37,022 INFO L225 Difference]: With dead ends: 144900 [2021-11-02 22:50:37,023 INFO L226 Difference]: Without dead ends: 71109 [2021-11-02 22:50:37,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:50:37,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71109 states. [2021-11-02 22:50:37,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71109 to 69074. [2021-11-02 22:50:37,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69074 states, 69073 states have (on average 1.065249808173961) internal successors, (73580), 69073 states have internal predecessors, (73580), 0 states have call successors, (0), 0 states 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 22:50:37,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69074 states to 69074 states and 73580 transitions. [2021-11-02 22:50:37,965 INFO L78 Accepts]: Start accepts. Automaton has 69074 states and 73580 transitions. Word has length 668 [2021-11-02 22:50:37,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:37,965 INFO L470 AbstractCegarLoop]: Abstraction has 69074 states and 73580 transitions. [2021-11-02 22:50:37,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 110.66666666666667) internal successors, (664), 5 states have internal predecessors, (664), 0 states have call successors, (0), 0 states 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 22:50:37,966 INFO L276 IsEmpty]: Start isEmpty. Operand 69074 states and 73580 transitions. [2021-11-02 22:50:37,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 684 [2021-11-02 22:50:37,978 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:37,979 INFO L513 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:50:37,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-02 22:50:37,979 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:50:37,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:37,980 INFO L85 PathProgramCache]: Analyzing trace with hash -757092438, now seen corresponding path program 1 times [2021-11-02 22:50:37,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:37,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816942120] [2021-11-02 22:50:37,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:37,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 437 proven. 0 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-02 22:50:38,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:38,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816942120] [2021-11-02 22:50:38,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816942120] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:50:38,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:50:38,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:50:38,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681927238] [2021-11-02 22:50:38,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:50:38,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:38,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:50:38,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:50:38,266 INFO L87 Difference]: Start difference. First operand 69074 states and 73580 transitions. Second operand has 4 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 0 states have call successors, (0), 0 states 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 22:50:42,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:42,207 INFO L93 Difference]: Finished difference Result 149628 states and 159747 transitions. [2021-11-02 22:50:42,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:50:42,208 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 0 states have call successors, (0), 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 683 [2021-11-02 22:50:42,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:42,276 INFO L225 Difference]: With dead ends: 149628 [2021-11-02 22:50:42,276 INFO L226 Difference]: Without dead ends: 79693 [2021-11-02 22:50:42,309 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:50:42,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79693 states. [2021-11-02 22:50:43,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79693 to 73298. [2021-11-02 22:50:43,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73298 states, 73297 states have (on average 1.0655688500211469) internal successors, (78103), 73297 states have internal predecessors, (78103), 0 states have call successors, (0), 0 states 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 22:50:43,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73298 states to 73298 states and 78103 transitions. [2021-11-02 22:50:43,327 INFO L78 Accepts]: Start accepts. Automaton has 73298 states and 78103 transitions. Word has length 683 [2021-11-02 22:50:43,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:43,328 INFO L470 AbstractCegarLoop]: Abstraction has 73298 states and 78103 transitions. [2021-11-02 22:50:43,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 0 states have call successors, (0), 0 states 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 22:50:43,328 INFO L276 IsEmpty]: Start isEmpty. Operand 73298 states and 78103 transitions. [2021-11-02 22:50:43,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 692 [2021-11-02 22:50:43,343 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:43,344 INFO L513 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:50:43,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-02 22:50:43,345 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:50:43,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:43,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1670526685, now seen corresponding path program 1 times [2021-11-02 22:50:43,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:43,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167111881] [2021-11-02 22:50:43,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:43,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 717 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-02 22:50:43,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:43,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167111881] [2021-11-02 22:50:43,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167111881] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:50:43,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:50:43,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:50:43,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128414180] [2021-11-02 22:50:43,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:50:43,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:43,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:50:43,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:50:43,618 INFO L87 Difference]: Start difference. First operand 73298 states and 78103 transitions. Second operand has 4 states, 4 states have (on average 132.25) internal successors, (529), 4 states have internal predecessors, (529), 0 states have call successors, (0), 0 states 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 22:50:47,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:47,171 INFO L93 Difference]: Finished difference Result 152557 states and 162333 transitions. [2021-11-02 22:50:47,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:50:47,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 132.25) internal successors, (529), 4 states have internal predecessors, (529), 0 states have call successors, (0), 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 691 [2021-11-02 22:50:47,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:47,240 INFO L225 Difference]: With dead ends: 152557 [2021-11-02 22:50:47,240 INFO L226 Difference]: Without dead ends: 79261 [2021-11-02 22:50:47,267 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 22:50:47,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79261 states. [2021-11-02 22:50:48,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79261 to 72873. [2021-11-02 22:50:48,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72873 states, 72872 states have (on average 1.0632067186299266) internal successors, (77478), 72872 states have internal predecessors, (77478), 0 states have call successors, (0), 0 states 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 22:50:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72873 states to 72873 states and 77478 transitions. [2021-11-02 22:50:48,271 INFO L78 Accepts]: Start accepts. Automaton has 72873 states and 77478 transitions. Word has length 691 [2021-11-02 22:50:48,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:48,272 INFO L470 AbstractCegarLoop]: Abstraction has 72873 states and 77478 transitions. [2021-11-02 22:50:48,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.25) internal successors, (529), 4 states have internal predecessors, (529), 0 states have call successors, (0), 0 states 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 22:50:48,272 INFO L276 IsEmpty]: Start isEmpty. Operand 72873 states and 77478 transitions. [2021-11-02 22:50:48,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 711 [2021-11-02 22:50:48,287 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:48,288 INFO L513 BasicCegarLoop]: trace histogram [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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:50:48,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-02 22:50:48,288 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:50:48,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:48,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1876727815, now seen corresponding path program 1 times [2021-11-02 22:50:48,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:48,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059608463] [2021-11-02 22:50:48,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:48,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 755 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-11-02 22:50:48,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:48,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059608463] [2021-11-02 22:50:48,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059608463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:50:48,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:50:48,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:50:48,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322466145] [2021-11-02 22:50:48,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:50:48,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:48,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:50:48,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:50:48,567 INFO L87 Difference]: Start difference. First operand 72873 states and 77478 transitions. Second operand has 4 states, 4 states have (on average 137.75) internal successors, (551), 4 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)